Mybatis使用接口添加数据,报错 5C

这是单元测试

 public SqlSessionFactory getSqlSessionFactory() throws IOException {
        String resource = "mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        return new SqlSessionFactoryBuilder().build(inputStream);
    }
    @Test
    public void test03() throws IOException{
        SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();
        SqlSession openSession = sqlSessionFactory.openSession();
        try{
        EmployeeMapper mapper = openSession.getMapper(EmployeeMapper.class);
        Employee employee=new Employee(null, "leihong", "159159");

        //System.out.println(employee);

        mapper.insertuser(employee);
        openSession.commit();
        System.out.println("成功");
        }finally{
            openSession.close();

        }
    }

这是接口:

 package com.atguigu.mybatis.dao;

import com.atguigu.mybatis.bean.Employee;

public interface EmployeeMapper {

    public Employee getEmpById(Integer id);
    public Employee insertuser(Employee employee);

}

这是sql映射文件:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
**

    <mapper namespace="com.atguigu.mybatis.dao.EmployeeMapper">
                    <select id="getEmpById" resultType="com.atguigu.mybatis.bean.Employee">
        select * from user where id = #{id}
    </select>
    <insert id="insertuser">
    insert into user(username,password) values(#{username},#{password})
    </insert>
</mapper>**

这是封装类:
package com.atguigu.mybatis.bean;

import org.apache.ibatis.type.Alias;

@Alias("emp")
public class Employee {

private Integer id;
private String username;
private String password;


public Employee() {
    super();
    // TODO Auto-generated constructor stub
}


public Employee(Integer id, String username, String password) {
    super();
    this.id = id;
    this.username = username;
    this.password = password;
}


public Integer getId() {
    return id;
}
public void setId(Integer id) {
    this.id = id;
}
public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
@Override
public String toString() {
    return "Employee [id=" + id + ", username=" + username + ", password=" + password + "]";
}

}

这是全局配置文件:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">

<properties resource="dbconfig.properties"></properties>
<settings>
    <setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
<typeAliases>

    <package name="com.atguigu.mybatis.bean"/>
</typeAliases>

<environments default="dev_mysql">
    <environment id="dev_mysql">
        <transactionManager type="JDBC"></transactionManager>
        <dataSource type="POOLED">
            <property name="driver" value="${jdbc.driver}" />
            <property name="url" value="${jdbc.url}" />
            <property name="username" value="${jdbc.username}" />
            <property name="password" value="${jdbc.password}" />
        </dataSource>
    </environment>

    <environment id="dev_oracle">
        <transactionManager type="JDBC" />
        <dataSource type="POOLED">
            <property name="driver" value="${orcl.driver}" />
            <property name="url" value="${orcl.url}" />
            <property name="username" value="${orcl.username}" />
            <property name="password" value="${orcl.password}" />
        </dataSource>
    </environment>
</environments>

<databaseIdProvider type="DB_VENDOR">
    <!-- 为不同的数据库厂商起别名 -->
    <property name="MySQL" value="mysql"/>
    <property name="Oracle" value="oracle"/>
    <property name="SQL Server" value="sqlserver"/>
</databaseIdProvider>

<mappers>
    <package name="com.atguigu.mybatis.dao"/>
</mappers>

这是报错信息:

org.apache.ibatis.binding.BindingException: Mapper method 'com.atguigu.mybatis.dao.EmployeeMapper.insertuser' has an unsupported return type: class com.atguigu.mybatis.bean.Employee
        at org.apache.ibatis.binding.MapperMethod.rowCountResult(MapperMethod.java:109)
        at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:57)
        at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
        at com.sun.proxy.$Proxy7.insertuser(Unknown Source)
        at com.atguigu.mybatis.test.MyBatisTest.test03(MyBatisTest.java:117)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
        at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)al.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

4个回答

你把报错信息贴出来。好针对问题看。

qq_39330298
曾几何时锐不可当 回复Nothing_katu: 重新跟新
接近 3 年之前 回复
qq_39330298
曾几何时锐不可当 回复Nothing_katu: 已经改了,现在是新的错误了
接近 3 年之前 回复
u010001477
Nothing_katu 这里说的好像时找不到EmployeeMapper.xml配置文件啊?你mybatis-config.xml文件里面配置的路径对吗?检查看看
接近 3 年之前 回复
qq_39330298
曾几何时锐不可当 已经贴出来了
接近 3 年之前 回复
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.mybatis.dao.EmployeeMapper" >
<select id="getEmpById" resultType="com.atguigu.mybatis.bean.Employee">
    select * from user where id = #{id}
</select>
<insert id="insertuser">
insert into user(username,password) values(#{username},#{password})
</insert>
</mapper>

加上mapper

qq_39330298
曾几何时锐不可当 加了的有
接近 3 年之前 回复

你的参数对象EmployeeMapper与你的mapper对应的对象Employee不是同一个对象

 Mapper method 'com.atguigu.mybatis.dao.EmployeeMapper.insertuser' has an unsupported return type: class com.atguigu.mybatis.bean.Employee

public interface EmployeeMapper {

public Employee getEmpById(Integer id);
public Employee insertuser(Employee employee);

}
insertUser返回的不是 Employee 这个对象,是影响表行数的值 ,应该是 int 类型

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org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) Caused by: java.sql.SQLException: Operand should contain 1 column(s) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1086) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2617) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2778) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2834) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2156) at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1379) at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:169) at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:44) at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:69) at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:48) at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:105) at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:71) at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:152) at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:141) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) ... 35 more Process finished with exit code -1

在mybatis中插入数据为什么报空值

@Select("insert into shopBus values(#{id},#{goods.id},#{user.id})") @SelectKey(before=true,keyColumn="id",keyProperty="id",resultType=Integer.class,statement="select shopBus_seq.nextval as id from dual") public void addShop(Shop shop); goods和user对象都存有值,为什么还报空值 private Integer id; private Goods goods; private User user; Goods [id=83, goodsName=外套, count=1000, price=100.0, image=banner2.jpg, imageFile=null, remark=阿大恶趣味群若若群,] User [id=1, userName=aaa, password=111111, phone=12345678900]

mybatis-plus的baseMapper的方法在配置了多数据源的情况下如何使用

![配置了多数据源后,mybatis-plus的baseMapper的里面的方法无法使用,必须在对应的xml中加上对应方法的配置才能使用](https://img-ask.csdn.net/upload/201810/15/1539597041_175872.png) 配置了多数据源后,mybatis-plus的baseMapper的里面的方法无法使用,必须在对应的xml中加上对应方法的配置才能使用

Mybatis小练习 报错 求大神指导,信息详尽

# UserMapper ``` public interface UserMapper { //根据id查询用户信息 public User findUserById(int id) throws Exception; //根据用户名列查询用户列表 public List<User> findUserByName(String name)throws Exception; //插入用户 public void insertUser(User user)throws Exception; } ``` # UserMapper.xml ``` <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <!-- namespace命名空间,作用就是对sql进行分类化管理,理解sql隔离 注意:使用mapper代理方法开发,namespace有特殊重要的作用,namespace等于mapper接口地址 --> <mapper namespace="com.neuedu.mapper.UserMapper"> <!-- 在 映射文件中配置很多sql语句 --> <!-- 需求:通过id查询用户表的记录 --> <!-- 通过 select执行数据库查询 id:标识 映射文件中的 sql 将sql语句封装到mappedStatement对象中,所以将id称为statement的id parameterType:指定输入 参数的类型,这里指定int型 #{}表示一个占位符号 #{id}:其中的id表示接收输入 的参数,参数名称就是id,如果输入 参数是简单类型,#{}中的参数名可以任意,可以value或其它名称 resultType:指定sql输出结果 的所映射的java对象类型,select指定resultType表示将单条记录映射成的java对象。 --> <select id="findUserById" parameterType="int" resultType="user"> SELECT * FROM user WHERE id=#{value} </select> <!-- 根据用户名称模糊查询用户信息,可能返回多条 resultType:指定就是单条记录所映射的java对象 类型 ${}:表示拼接sql串,将接收到参数的内容不加任何修饰拼接在sql中。 使用${}拼接sql,引起 sql注入 ${value}:接收输入 参数的内容,如果传入类型是简单类型,${}中只能使用value --> <select id="findUserByName" parameterType="java.lang.String" resultType="com.neuedu.pojo.User"> SELECT * FROM user WHERE username LIKE '%${value}%' </select> <!-- 添加用户 parameterType:指定输入 参数类型是pojo(包括 用户信息) #{}中指定pojo的属性名,接收到pojo对象的属性值,mybatis通过OGNL获取对象的属性值 --> <insert id="insertUser" parameterType="com.neuedu.pojo.User"> <!-- 将插入数据的主键返回,返回到user对象中 SELECT LAST_INSERT_ID():得到刚insert进去记录的主键值,只适用与自增主键 keyProperty:将查询到主键值设置到parameterType指定的对象的哪个属性 order:SELECT LAST_INSERT_ID()执行顺序,相对于insert语句来说它的执行顺序 resultType:指定SELECT LAST_INSERT_ID()的结果类型 --> insert into user(id,username,birthday,sex,address) values (seq_user.nextval,#{username},#{birthday},#{sex},#{address}) <!-- 插入数据后,返回自动增长列的ID值,将sql语句的返回值赋给parameterType绑定对象的ID属性 MySQL中使用: select LAST_INSERT_ID() --> <selectKey keyProperty="id" order="AFTER" resultType="int"> SELECT LAST_INSERT_ID() <!--select seq_user.currval from dual--> </selectKey> <!-- 使用mysql的uuid()生成主键 执行过程: 首先通过uuid()得到主键,将主键设置到user对象的id属性中 其次在insert执行时,从user对象中取出id属性值 --> <!-- <selectKey keyProperty="id" order="BEFORE" resultType="java.lang.String"> SELECT uuid() </selectKey> insert into user(id,username,birthday,sex,address) value(#{id},#{username},#{birthday},#{sex},#{address}) --> </insert> <!-- 删除 用户 根据id删除用户,需要输入 id值 --> <delete id="deleteUser" parameterType="java.lang.Integer"> delete from user where id=#{id} </delete> <!-- 根据id更新用户 分析: 需要传入用户的id 需要传入用户的更新信息 parameterType指定user对象,包括 id和更新信息,注意:id必须存在 #{id}:从输入 user对象中获取id属性值 --> <update id="updateUser" parameterType="com.neuedu.pojo.User"> update user set username=#{username},birthday=#{birthday},sex=#{sex},address=#{address} where id=#{id} </update> </mapper> ``` # Tset ``` public class UserMapperTest { private SqlSessionFactory sqlSessionFactory; // 此方法是在执行testFindUserById之前执行 @Before public void setUp() throws Exception { // 创建sqlSessionFactory // mybatis配置文件 String resource = "config/SqlMapConfig.xml"; // 得到配置文件流 InputStream inputStream = Resources.getResourceAsStream(resource); // 创建会话工厂,传入mybatis的配置文件信息 sqlSessionFactory = new SqlSessionFactoryBuilder() .build(inputStream); } @Test public void testFindUserById() throws Exception { SqlSession sqlSession = sqlSessionFactory.openSession(); //创建UserMapper对象,mybatis自动生成mapper代理对象 UserMapper userMapper = sqlSession.getMapper(UserMapper.class); //调用userMapper的方法 User user = userMapper.findUserById(1); System.out.println(user); } @Test public void testFindUserByName() throws Exception { SqlSession sqlSession = sqlSessionFactory.openSession(); //创建UserMapper对象,mybatis自动生成mapper代理对象 UserMapper userMapper = sqlSession.getMapper(UserMapper.class); //调用userMapper的方法 List<User> list = userMapper.findUserByName("袁超"); sqlSession.close(); System.out.println(list); } } ``` # 报错信息 ``` DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter. DEBUG [main] - Class not found: org.jboss.vfs.VFS DEBUG [main] - JBoss 6 VFS API is not available in this environment. DEBUG [main] - Class not found: org.jboss.vfs.VirtualFile DEBUG [main] - VFS implementation org.apache.ibatis.io.JBoss6VFS is not valid in this environment. DEBUG [main] - Using VFS adapter org.apache.ibatis.io.DefaultVFS DEBUG [main] - Find JAR URL: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/pojo DEBUG [main] - Not a JAR: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/pojo DEBUG [main] - Reader entry: User.class DEBUG [main] - Listing file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/pojo DEBUG [main] - Find JAR URL: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/pojo/User.class DEBUG [main] - Not a JAR: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/pojo/User.class DEBUG [main] - Reader entry: ���� 1 N DEBUG [main] - Checking to see if class com.neuedu.pojo.User matches criteria [is assignable to Object] DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - Find JAR URL: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/test-classes/com/neuedu/mapper DEBUG [main] - Not a JAR: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/test-classes/com/neuedu/mapper DEBUG [main] - Reader entry: UserMapperTest.class DEBUG [main] - Listing file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/test-classes/com/neuedu/mapper DEBUG [main] - Find JAR URL: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/test-classes/com/neuedu/mapper/UserMapperTest.class DEBUG [main] - Not a JAR: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/test-classes/com/neuedu/mapper/UserMapperTest.class DEBUG [main] - Reader entry: ���� 1 a DEBUG [main] - Find JAR URL: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/mapper DEBUG [main] - Not a JAR: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/mapper DEBUG [main] - Reader entry: UserMapper.class DEBUG [main] - Reader entry: UserMapper.xml DEBUG [main] - Listing file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/mapper DEBUG [main] - Find JAR URL: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/mapper/UserMapper.class DEBUG [main] - Not a JAR: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/mapper/UserMapper.class DEBUG [main] - Reader entry: ���� 1    findUserById (I)Lcom/neuedu/pojo/User; DEBUG [main] - Find JAR URL: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/mapper/UserMapper.xml DEBUG [main] - Not a JAR: file:/C:/Users/95638/Desktop/mybatis/ch02-mybatis01/ch02-mybatis01/target/classes/com/neuedu/mapper/UserMapper.xml DEBUG [main] - Reader entry: <?xml version="1.0" encoding="UTF-8" ?> DEBUG [main] - Checking to see if class com.neuedu.mapper.UserMapperTest matches criteria [is assignable to Object] DEBUG [main] - Checking to see if class com.neuedu.mapper.UserMapper matches criteria [is assignable to Object] DEBUG [main] - Opening JDBC Connection DEBUG [main] - Created connection 209833425. DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@c81cdd1] DEBUG [main] - ==> Preparing: SELECT * FROM T_USER WHERE username LIKE '%袁超%' DEBUG [main] - ==> Parameters: org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'mybatis.t_user' doesn't exist ### The error may exist in com/neuedu/mapper/UserMapper.xml ### The error may involve com.neuedu.mapper.UserMapper.findUserByName-Inline ### The error occurred while setting parameters ### SQL: SELECT * FROM T_USER WHERE username LIKE '%袁超%' ### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'mybatis.t_user' doesn't exist at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:150) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) at com.sun.proxy.$Proxy3.findUserByName(Unknown Source) at com.neuedu.mapper.UserMapperTest.testFindUserByName(UserMapperTest.java:68) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'mybatis.t_user' doesn't exist at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:400) at com.mysql.jdbc.Util.getInstance(Util.java:383) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:980) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3847) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3783) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2447) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1901) at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1193) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59) at com.sun.proxy.$Proxy5.execute(Unknown Source) at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:63) at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79) at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63) at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324) at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) ... 29 more ``` # SqlMapConfig.xml ``` <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 加载属性文件 --> <properties resource="db.properties"> <!--properties中还可以配置一些属性名和属性值 --> <!-- <property name="jdbc.driver" value=""/> --> </properties> <!-- 全局配置参数,需要时再设置 --> <!-- <settings> </settings> --> <!-- 别名定义 --> <typeAliases> <!-- 针对单个别名定义 type:类型的路径 alias:别名 --> <!-- <typeAlias type="com.neuedu.mybatis.po.User" alias="user"/> --> <!-- 批量别名定义 指定包名,mybatis自动扫描包中的po类,自动定义别名,别名就是类名(首字母大写或小写都可以) --> <package name="com.neuedu.pojo"/> </typeAliases> <!-- 和spring整合后 environments配置将废除--> <environments default="development"> <environment id="development"> <!-- 使用jdbc事务管理,事务控制由mybatis--> <transactionManager type="JDBC" /> <!-- 数据库连接池,由mybatis管理--> <dataSource type="POOLED"> <property name="driver" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </dataSource> </environment> </environments> <!-- 加载 映射文件 --> <mappers> <mapper resource="sqlmap/User.xml"/> <!--通过resource方法一次加载一个映射文件 --> <!-- <mapper resource="sqlmap/User.xml"/> --> <!-- 通过mapper接口加载单个 映射文件 遵循一些规范:需要将mapper接口类名和mapper.xml映射文件名称保持一致,且在一个目录 中 上边规范的前提是:使用的是mapper代理方法 --> <!-- <mapper class="com.neuedu.mapper.UserMapper"/> --> <!-- 批量加载mapper 指定mapper接口的包名,mybatis自动扫描包下边所有mapper接口进行加载 遵循一些规范:需要将mapper接口类名和mapper.xml映射文件名称保持一致,且在一个目录 中 上边规范的前提是:使用的是mapper代理方法 --> <package name="com.neuedu.mapper"/> </mappers> </configuration> ``` # User ``` public class User { //属性名和数据库表的字段对应 private int id; private String username;// 用户姓名 private String sex;// 性别 private Date birthday;// 生日 private String address;// 地址 public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Override public String toString() { return "User [id=" + id + ", username=" + username + ", sex=" + sex + ", birthday=" + birthday + ", address=" + address + "]"; } } ``` 也不知道为什么,明明已经在UserMapper.xml里面把表名改了,但是报错信息里查找的还是T-user表 求大神指导!感恩! # 问题已解决 在maven文件里加上下面的代码 ``` <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*Mapper.xml</include> </includes> </resource> </resources> ```

spring、mybatis整合多线程问题

1.在已有的spring+mybatis项目中增加了多线程访问数据库的业务,主要是查询,添加,写入到其它数据源。 2.部分需要支持多线程的service类已增加@scope("prototype"),从debug可以看到service获取到的已是不同的对象(service是线程类,获取方式通过spring上下文获取)。 3.service中注解的mapper是单例的,运行过程中经常报连接已关闭。开始的想法是在mapper接口上也加入@scope("repository")注解,结果加上后,程序启动报错。 4.现在我是直接用原始jdbc来处理可以很好的解决多线程的问题,想请教下大家在原有的框架中怎么处理才能支持多线程。 <br></br> #2018年4月8日,更新 问题已解决,在service类中注解SqlSessionFactory对象,通过openSession方法可以获取到一个SqlSession对象,然后getMapper出来的对象就是线程安全的。

springmvc+mybatis调用controller报autowired失败

@service、@controller都写了,@service也写在了实现类而不是接口上,controller中autowired标在了set方法上,单元测试中service和serviceImpl没有问题,但页面调用controller却宝座autowired失败找不到对应service网上找了很多问题我都没有,大概是我检查不够仔细?求大神帮助 添加了一下spring配置和web.xml 异常信息: ``` org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void controller.LoginController.setLoginService(service.LoginService); nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [service.LoginService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} ``` controller ``` @Controller("loginController") @RequestMapping("/User") @Component public class LoginController { private LoginService loginService; public LoginService getLoginService() { return loginService; } @Autowired @Qualifier("loginService") public void setLoginService(LoginService loginService) { this.loginService = loginService; } @RequestMapping(value = "/Login",method=RequestMethod.POST) public String userLogin(HttpSession session,@RequestParam("userid") String userid, @RequestParam("password") String password, @RequestParam("perflg") int perflg,Model model ) { User user = loginService.Login(userid, password, perflg); if (loginService.Login(userid, password, perflg) != null) { session.setAttribute("userid", user.getUserId()); session.setAttribute("username",user.getUserName()); session.setAttribute("permission", user.getPermission()); session.removeAttribute("nologin"); if (perflg == 0) { return "adminhome"; } if (perflg == 1) { return "goverhome"; } if (perflg == 2) { return "compahome"; } if (perflg == 3) { return "consehome"; } if (perflg == 4) { return "peoplehome"; } } model.addAttribute("Lb_alert", "用户名或密码不正确"); session.setAttribute("nologin", "你还没有登陆."); return "forward:/Login"; } } ``` serviceimpl: ``` @Service("loginService") @Transactional @Component public class LoginServiceImpl implements LoginService { private LoginMapper loginMapper; public LoginMapper getLoginMapper() { return loginMapper; } @Autowired public void setLoginMapper(LoginMapper loginMapper) { this.loginMapper = loginMapper; } @Override public User Login(String userid, String password, int perflg){ return loginMapper.Login(userid, password, perflg); } } ``` service ``` public interface LoginService { public User Login(String userid,String password,int perflg); } ``` spring.xml ``` <!-- 引入属性文件 --> <context:property-placeholder location="classpath:mysqldb.properties" /> <!-- 自动注入 --> <context:component-scan base-package="service" /> <!-- 加载properties文件 --> <!-- <bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="locations"> <list> <value>classpath:mysqldb.properties</value> </list> </property> </bean> --> ``` spring-mvc.xml ``` <!-- 自动扫描controller包下的所有类,使其认为spring mvc的控制器 --> <context:component-scan base-package="controller" /> <!-- 配置静态资源吗,直接映射到对应的文件夹,不被DispatcherServlet处理,需要重新spring-mvc-3.0.xsd --> <mvc:resources mapping="/images/**" location="/images/" /> <mvc:resources mapping="/js/**" location="/js/" /> <mvc:resources mapping="/css/**" location="/css/" /> <!-- 对转向页面的路径解析。prefix:前缀, suffix:后缀 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp" /> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding"> <value>UTF-8</value> </property> <property name="maxUploadSize"> <value>32505856</value><!-- 上传文件 大小限制为31M,31*1024*1024 --> </property> <property name="maxInMemorySize"> <value>4096</value> </property> </bean> ``` spring-mybatis.xml ``` <!-- 配置数据源 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <!-- 基本属性 url、user、password --> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/electric" /> <property name="username" value="root" /> <property name="password" value="root" /> <property name="initialSize" value="1" /> <property name="minIdle" value="1" /> <property name="maxActive" value="20" /> <property name="maxWait" value="60000" /> <!-- 超过时间限制是否回收 --> <property name="removeAbandoned" value="true" /> <!-- 超过时间限制多长; --> <property name="removeAbandonedTimeout" value="180" /> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000" /> <!-- 用来检测连接是否有效的sql,要求是一个查询语句--> <property name="validationQuery" value="SELECT 1" /> <!-- 申请连接的时候检测 --> <property name="testWhileIdle" value="true" /> <!-- 申请连接时执行validationQuery检测连接是否有效,配置为true会降低性能 --> <property name="testOnBorrow" value="false" /> <!-- 归还连接时执行validationQuery检测连接是否有效,配置为true会降低性能 --> <property name="testOnReturn" value="false" /> </bean> <!-- Mybatis文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 映射文件路径 --> <property name="mapperLocations" value="classpath:mapping/*.xml" /> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="mapper" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </bean> <!-- 事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> ``` web.xml ``` <display-name>Archetype Created Web Application</display-name> <!-- Spring和mybatis的配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value> </context-param> <!-- spring mvc servlet --> <servlet> <description>spring mvc servlet</description> <servlet-name>springMvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <description>spring mvc 配置文件</description> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list> <!-- 配置session超时时间,单位分钟 --> <session-config> <session-timeout>15</session-timeout> </session-config> ```

求助:mybatis association 关联查询时,只返回第一条记录

1、这个是配置文件 <mapper namespace="com.mapping.IArticleOperation"> <resultMap type="User" id="userResultMap"> <!-- 属性名和数据库列名映射 --> <id property="id" column="id" /> <result property="userName" column="userName" /> <result property="userPwd" column="userPwd" /> </resultMap> <resultMap type="Article" id="articleResultMap" > <id property="id" column="id" /> <result property="title" column="title" /> <result property="content" column="content" /> <!-- 将article的user属性映射到userResultMap --> <association property="user" resultMap="userResultMap" /> </resultMap> <!--查询--> <select id="getUserArticles" parameterType="int" resultMap="articleResultMap" > select user.id,user.userName,user.userPwd,article.title,article.content from user,article where user.id = article.userId and user.id = #{id} </select> </mapper> 2、select user.id,user.userName,user.userPwd,article.title,article.content from user,article where user.id = article.userId and user.id = 1 这条sql语句在mysql中查询是有5条记录的,但是在代码中就只有一条记录 3、public List<Article> getUserArticles(int id); 这个是接口

在线等我后台传输到前台的数据为什么显示不出来(500错误 )

``` <table class="easyui-datagrid" id="itemList" title="商品列表" data-options="singleSelect:false,collapsible:true,pagination:true,url:'/rest/item',method:'get',pageSize:30,toolbar:toolbar"> <thead> <tr> <th data-options="field:'ck',checkbox:true"></th> <th data-options="field:'id',width:60">商品ID</th> <th data-options="field:'title',width:200">商品标题</th> <th data-options="field:'cid',width:100">叶子类目</th> <th data-options="field:'sellPoint',width:100">卖点</th> <th data-options="field:'price',width:70,align:'right',formatter:TAOTAO.formatPrice">价格</th> <th data-options="field:'num',width:70,align:'right'">库存数量</th> <th data-options="field:'barcode',width:100">条形码</th> <th data-options="field:'status',width:60,align:'center',formatter:TAOTAO.formatItemStatus">状态</th> <th data-options="field:'created',width:130,align:'center',formatter:TAOTAO.formatDateTime">创建日期</th> <th data-options="field:'updated',width:130,align:'center',formatter:TAOTAO.formatDateTime">更新日期</th> </tr> </thead> </table> ``` 这些是页面的请求; 后台代码: //查询商品列表; @RequestMapping(method=RequestMethod.GET) public ResponseEntity<EasyUIResult> queryItemList( @RequestParam(value="page",defaultValue="1") Integer pageNum, @RequestParam(value="rows", defaultValue="30") Integer pageSize){ //因为easyui数据表格需要两个数据去做分页显示 try { EasyUIResult easy=itemService.queryOrderbyCreated(pageNum,pageSize); if(easy == null){ ResponseEntity.status(HttpStatus.NOT_FOUND).body(null); }else { ResponseEntity.ok(easy); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null); } 业务层: public EasyUIResult queryOrderbyCreated(Integer page, Integer rows) { //将查询出来的数据封装到easyuiresult中去; PageHelper.startPage(page,rows); Example example=new Example(Item.class); //调用商品的映射去向数据库发送查询 List<Item> selectByExample = this.itemMapper.selectByExample(example); System.out.println(selectByExample.size()); PageInfo<Item> info = new PageInfo<Item>(selectByExample); return new EasyUIResult(info.getTotal(), info.getList()); } 查询结果: mapper查询的时候是有结果的: Preparing: SELECT CID,ID,UPDATED,STATUS,PRICE,CREATED,IMAGE,BARCODE,SELL_POINT SELLPOINT,TITLE,NUM FROM tb_item limit ?,? [DEBUG] ==> Parameters: 0(Integer), 30(Integer) ItemMapper.selectByExample_PageHelper]-[DEBUG] <== Total: 4 2016-10-01 19:41:56,645 [http-bio-8081-exec-2] [org.mybatis.spring.SqlSessionUtils]-[DEBUG] Transaction synchronization committing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7c4159a6] 2016-10-01 19:41:56,645 [http-bio-8081-exec-2] [org.mybatis.spring.SqlSessionUtils]-[DEBUG] Transaction synchronization deregistering SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7c4159a6] 2016-10-01 19:41:56,645 [http-bio-8081-exec-2] [org.mybatis.spring.SqlSessionUtils]-[DEBUG] Transaction synchronization closing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7c4159a6] 2016-10-01 19:41:56,645 [http-bio-8081-exec-2] [org.springframework.jdbc.datasource.DataSourceTransactionManager]-[DEBUG] Initiating transaction commit 2016-10-01 19:41:56,645 [http-bio-8081-exec-2] [org.springframework.jdbc.datasource.DataSourceTransactionManager]-[DEBUG] Committing JDBC transaction on Connection [ConnectionHandle{url=jdbc:mysql://127.0.0.1:3306/taotao?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true, user=root, debugHandle=null, lastResetAgoInSec=0, lastUsedAgoInSec=0, creationTimeAgoInSec=0}] 2016-10-01 19:41:56,646 [http-bio-8081-exec-2] [org.springframework.jdbc.datasource.DataSourceUtils]-[DEBUG] Resetting read-only flag of JDBC Connection [ConnectionHandle{url=jdbc:mysql://127.0.0.1:3306/taotao?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true, user=root, debugHandle=null, lastResetAgoInSec=0, lastUsedAgoInSec=0, creationTimeAgoInSec=0}] 2016-10-01 19:41:56,646 [http-bio-8081-exec-2] [org.springframework.jdbc.datasource.DataSourceTransactionManager]-[DEBUG] Releasing JDBC Connection [ConnectionHandle{url=jdbc:mysql://127.0.0.1:3306/taotao?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true, user=root, debugHandle=null, lastResetAgoInSec=0, lastUsedAgoInSec=0, creationTimeAgoInSec=0}] after transaction 2016-10-01 19:41:56,646 [http-bio-8081-exec-2] [org.springframework.jdbc.datasource.DataSourceUtils]-[DEBUG] Returning JDBC Connection to DataSource 2016-10-01 19:41:56,693 [http-bio-8081-exec-2] [org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdviceChain]-[DEBUG] Invoking ResponseBodyAdvice chain for body=null 2016-10-01 19:41:56,693 [http-bio-8081-exec-2] [org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdviceChain]-[DEBUG] After ResponseBodyAdvice chain body=null 2016-10-01 19:41:56,693 [http-bio-8081-exec-2] [org.springframework.web.servlet.DispatcherServlet]-[DEBUG] Null ModelAndView returned to DispatcherServlet with name 'taotao-manage': assuming HandlerAdapter completed request handling 2016-10-01 19:41:56,693 [http-bio-8081-exec-2] [org.springframework.web.servlet.DispatcherServlet]-[DEBUG] Successfully completed request NetworkError: 500 Internal Server Error

使用SpringBoot+MybatisPlus实现多表入库的时候报空指针异常

使用SpringBoot+MybatisPlus实现多表入库的时候报空指针异常,主表数据可以 录入,但是附表得数据不能录入 提示java.lang.NullPointerException 报错图 ![报错图](https://img-ask.csdn.net/upload/201903/30/1553953693_83485.png) 断点 ![图片说明](https://img-ask.csdn.net/upload/201903/30/1553953874_99146.png) pojo ![图片说明](https://img-ask.csdn.net/upload/201903/30/1553953769_550891.png) ![图片说明](https://img-ask.csdn.net/upload/201903/30/1553953792_531003.png) 代码如下 Service ``` @Autowired private WebOrderMapper webOrderMapper; @Autowired private WebOrderItemMapper webOrderItemMapper; public String saveOrder(Order order ) { //准备订单编号 船东id+货主id+当前时间 String orderId = System.currentTimeMillis() +""; //为Order对象补齐数据 order.setOrderId(orderId); order.setCreated(new Date()); order.setUpdated(order.getCreated()); webOrderMapper.insert( order ); //为OrderItem补全数据 List<OrderItem> orderItemList = order.getOrderItems(); for (OrderItem orderItem : orderItemList){ orderItem.setOrderId( orderId ); orderItem.setCreated( new Date( ) ); order.setUpdated(order.getCreated()); webOrderItemMapper.insert(orderItem); } return orderId; } ``` Controller ``` @Autowired private WebOrderService webOrderService; @ApiOperation(value="实现订单入库", notes="实现订单入库的接口") @RequestMapping(value = "/submit" ,method = RequestMethod.POST) public SysResult saveOrder(Order order ,Long shipownerId,Long shipperId ,Long publishCargoId){ try { order.setShipownerId( shipownerId ); order.setShipperId( shipperId ); order.setPublishCargoId( publishCargoId ); String orderId = webOrderService.saveOrder( order ); if(!StringUtils.isEmpty( orderId )){ return SysResult.ok(orderId); } }catch (Exception e){ e.printStackTrace(); } return SysResult.build( 201,"订单入库失败" ); } ```

mybatis 执行带多行sql 查询语句

``` begin <foreach collection="items" item="stu"> select name,address,city,province from teachers <trim prefix="where" prefixOverrides="and|or"> <if test="stu.name!=null"> and name =#{stu.name} </if> <if test="stu.age!=null"> and age =#{stu.age} </if> <if test="stu.name!=null"> and sex =#{stu.sex} </if> </trim> </foreach> 这样写的查询sql报无效的关系运算符,之后我想到的存储过程 Dao 接口 List<Teacher> queryTeacher(@Param("map")Map<String,Lis<Teacher> map) 查询sql { call(#{map.import_params,jdbcType=CURSOR,mode=IN}, #{map.out_params,mode=OUT,javaType=ResultSet,resultMap="baseMap"}) } 调用 Map<String,Teacher> m = new HashMap<String,List<Teacher>); m.put("import_params,list); m.put("outparam,null); teacherDao.queryTeacher(m); 这样查询报错说我的 there is no type handler for com.test.QueryTeacher.importParam,改成 #{import_param} 报错 there is no param import_param available is map 网上有的人就是这样写的,但是报错,请教各位大神这个如何写, 我将不胜感激。 ```

ssm使用shiro启动报错

报错内容 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginRealm': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.warehouse.service.UserLogingService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.warehouse.service.UserLogingService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.annotation.Resource(shareable=true, lookup=, name=, description=, authenticationType=CONTAINER, type=class java.lang.Object, mappedName=)} shiro.xml配置 ``` <!-- 配置Shiro核心Filter --> <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean"> <!-- 安全管理器 --> <property name="securityManager" ref="securityManager" /> <!-- 未认证,跳转到哪个页面 --> <property name="loginUrl" value="/login.html" /> <!-- 登陆成功页面 --> <property name="successUrl" value="/index.html" /> <!-- 认证后,没有权限跳转页面 --> <property name="unauthorizedUrl" value="/unauthorized.html" /> <property name="filterChainDefinitions"> <value> /WEB-INF/views/login.html* = anon /loging.do* = anon /WEB-INF/llb/* = anon /res/** = anon /** = authc </value> </property> </bean> <!-- 配置Realm --> <bean id="loginRealm" class="com.warehouse.service.LoginRealm"> </bean> <!-- 安全管理器 --> <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager"> <property name="realm" ref="loginRealm" /> <!-- <property name="cacheManager" ref="shiroCacheManager" /> --> </bean> <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/> ``` applicationContext.xml配置 ``` applicationContext.xml配置 <import resource="applicationContext-shiro.xml"/> <!-- 开启定时任务 --> <task:annotation-driven /> <!-- MyBatis配置 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 显式指定Mapper文件位置 --> <property name="mapperLocations" value="classpath*:/mybatis/*Mapper.xml" /> <!-- mybatis配置文件路径 --> <property name="configLocation" value="classpath:/mybatis-config.xml" /> <property name="typeHandlersPackage" value="package com.warehouse.util" /> </bean> <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg index="0" ref="sqlSessionFactory" /> <!-- 这个执行器会批量执行更新语句, 还有SIMPLE 和 REUSE --> <!-- <constructor-arg index="1" value="BATCH"/> --> </bean> <!-- 扫描basePackage接口 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 映射器接口文件的包路径, --> <property name="basePackage" value="com.warehouse.dao" /> </bean> <!-- 使用annotation定义事务 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" /> <!-- 数据源配置, 使用Tomcat JDBC连接池 --> <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close"> <!-- Connection Info --> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <!-- Connection Pooling Info --> <property name="maxActive" value="${jdbc.pool.maxActive}" /> <property name="maxIdle" value="${jdbc.pool.maxIdle}" /> <property name="minIdle" value="0" /> <property name="defaultAutoCommit" value="false" /> </bean> <!-- production环境 --> <beans profile="production"> <context:property-placeholder ignore-unresolvable="true" file-encoding="utf-8" location="classpath:config.properties,classpath:jdbc.properties" /> </beans> ``` springMVC.xml配置 ``` <context:component-scan base-package="com.warehouse.*" /> <!--jsp可以不用添加这个 如果修改成html就必须用这个 --> <mvc:default-servlet-handler /> <mvc:annotation-driven /> <!--上面这个是为了html可以用 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" /> </list> </property> </bean> <!--模板 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" /> </list> </property> </bean> <mvc:resources mapping="/res/**" location="/res/" /> <bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"> <property name="templateLoaderPath" value="/WEB-INF/views/" /> <property name="freemarkerSettings"> <props> <prop key="template_update_delay">0</prop> <prop key="default_encoding">UTF-8</prop> <prop key="number_format">0.##########</prop> <prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop> <prop key="classic_compatible">true</prop> <prop key="template_exception_handler">ignore</prop> <prop key="auto_import">ftl/public.ftl as p,ftl/page.ftl as pg </prop> </props> </property> <property name="freemarkerVariables"> <map> <entry key="listProduct" value-ref="ProductDiretciv" /> </map> </property> </bean> <bean id="viewResolver" class="com.warehouse.freemarker.RichFreeMarkerViewResolver"> <property name="suffix"> <value>.html</value> </property> <property name="contentType" value="text/html;charset=UTF-8"></property> </bean> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views" /> <property name="suffix" value=".*" /> </bean> <!-- <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/views/" p:suffix=".html"/> --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" /> </list> </property> </bean> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> ``` @Controller @Scope("prototype") public class UserLogingController { @RequestMapping("loging.do") @ResponseBody public String loging(ForeginUser fuser) { Subject subject = SecurityUtils.getSubject(); AuthenticationToken token = new UsernamePasswordToken(fuser.getUsername(), fuser.getPassword()); try { subject.login(token); return _HTML_INDEX_; } catch (AuthenticationException e) { e.printStackTrace(); return _HTML_LOGIN_; } } }@Controller @Scope("prototype") public class UserLogingController { @RequestMapping("loging.do") @ResponseBody public String loging(ForeginUser fuser) { Subject subject = SecurityUtils.getSubject(); AuthenticationToken token = new UsernamePasswordToken(fuser.getUsername(), fuser.getPassword()); try { subject.login(token); return _HTML_INDEX_; } catch (AuthenticationException e) { e.printStackTrace(); return _HTML_LOGIN_; } } } ``` ``` package com.warehouse.realm; public class LoginRealm extends AuthorizingRealm { @Resource private UserLogingService userlogingService; @Override protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection arg0) { return null; } @Override // 认证 protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException { UsernamePasswordToken upToken = (UsernamePasswordToken) token; ForeginUser resultUser = userlogingService.findByUsername(upToken.getUsername()); if (resultUser == null) { return new SimpleAuthenticationInfo(resultUser, null, getName()); } else { return new SimpleAuthenticationInfo(resultUser, resultUser.getPassword(), getName()); } } } package com.warehouse.service; @Service public class UserLogingServiceImpl implements UserLogingService { @Resource private UserLogingMapper userLogingMapeer; @Override public ForeginUser checkLoaderInfo(ForeginUser fuser) { return userLogingMapeer.findByUser(fuser); } @Override public ForeginUser findByUsername(String username) { return userLogingMapeer.findByUsername(username); } }

在java中怎么处理才能将数据存入postgresql数据库中类型为hstore的字段?

/** * 增加批量导入映射. * * @param * @return */ @Action(value = "addImportMapper", results = { @Result(name = "addImportMapper", type = "json", params = { "root", "jsonResult" }) }) public String addImportMapper() { Boolean operateResult = getImportMapperService().addImportMapper( assembleParameterToAddImportMapper()); Map<String, Object> map = new HashMap<String, Object>(); map.put("result", operateResult); jsonResult = map; return "addImportMapper"; } /** * 由于是对外提供接口,不宜显式地暴露对象. <br/> * 故将参数组装成对象. * * @return */ @SuppressWarnings("unchecked") private ImportMapper assembleParameterToAddImportMapper() { ImportMapper importMapper = new ImportMapper(); importMapper.setUuid(UUIDGenerator.genUuidStr()); importMapper.setMapperName("教职工姓名"); importMapper.setMatchedOrgUuid("123456"); importMapper.setMapperRule("name=>name,age=>20"); //hstore类型 importMapper.setCreatorUuid("789456"); return importMapper; } <!-- 添加一条批量导入映射 --> <insert id="insertImportMapper" parameterType="net.firstelite.bicp.dtd.personnel$manage.system.ImportMapper"> insert into t_pm_sys_import_mapper ( uuid, mapper_name, matched_org_uuid, mapper_rule, creator_uuid, create_time, modify_time )values( #{uuid}, #{mapperName}, #{matchedOrgUuid}, #{mapperRule}, #{creatorUuid}, current_timestamp(0), current_timestamp(0) ) </insert>

java.sql。SQLException:连接是只读的。不允许导致数据修改的查询怎么解决?

这是applicationContext.xml ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <context:component-scan base-package="com.sht"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- Spring的配置文件,这里主要配置和业务逻辑有关的 --> <!-- ==================数据源,事务控制,xxx================== --> <context:property-placeholder location="classpath:dbconfig.properties" /> <bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driverClass}"></property> <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property> <property name="user" value="${jdbc.user}"></property> <property name="password" value="${jdbc.password}"></property> </bean> <!-- =======================配置和MyBatis的整合================== --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 指定mybatis全局配置文件的位置 --> <property name="configLocation" value="classpath:mybatis-config.xml"></property> <property name="dataSource" ref="pooledDataSource"></property> <!-- 指定mybatis,mqpper文件的位置 --> <property name="mapperLocations" value="classpath:mapper/*.xml"></property> </bean> <!-- 配置扫描器,将mybatis接口的实现加入到ioc容器中 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 扫描所有dao接口的实现,加入到ioc容器中 --> <property name="basePackage" value="com.sht.dao"></property> </bean> <!-- 配置一个可以执行批量的sqlSession --> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg> <constructor-arg name="executorType" value="BATCH"></constructor-arg> </bean> <!-- ========================================================= --> <!-- ================事务控制的配置============================= --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 控制数据源 --> <property name="dataSource" ref="pooledDataSource"></property> </bean> <!-- 开启基于注解的事务,使用xml配置形式的事务(必要主要的都是使用配置式) --> <aop:config> <!-- 切入点表达式 --> <aop:pointcut expression="execution(* com.sht.service.impl..*(..))" id="txPoint"/> <!-- 配置事务增强 --> <aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/> </aop:config> <!-- 配置事务增强,事务如何切入--> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <!-- 所有方法都是事务方法 --> <tx:method name="*"/> <!-- 以get开始的所有方法 --> <tx:method name="get*" read-only="true"/> </tx:attributes> </tx:advice> <!-- Spring配置文件的核心点(数据源、与mybatis的整合、事务控制) --> </beans> ``` ![图片说明](https://img-ask.csdn.net/upload/202004/12/1586679388_889234.png)

实体类,实现了序列化接口,在什么时候能用上?

例如实现序列化接口后,需要添加一个序列化版本ID ``` private static final long serialVersionUID = 1L; ```

IDEA做SSM框架整合时,出现无法加载mapper,导致无法注入。

今日学习SSM框架整合,整合以后,单独用测试类可以连接成功连接数据库,可是一加入MVC用TOMCAT启动,项目就会报错,错误内容为:Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 以下为项目各部分截图,有没有大佬帮我分析下,问题到底出在哪? ========================================================================================================================================== ![项目报错详细情况](https://img-ask.csdn.net/upload/201908/15/1565880941_652575.png) ## 项目报错详细情况 ![spring配置文件已经配置了mapper.xml路径和齐对应的接口扫描包](https://img-ask.csdn.net/upload/201908/15/1565880955_958792.png) ## spring配置文件已经配置了mapper.xml路径和齐对应的接口扫描包 ![编译文件夹target里已经编译出了mapper相关配置文件及接口类](https://img-ask.csdn.net/upload/201908/15/1565881099_526884.png) ## 编译文件夹target里已经编译出了mapper相关配置文件及接口类 ![mapper.xml里的namespace已经指明了接口路径](https://img-ask.csdn.net/upload/201908/15/1565881139_161198.png) ## mapper.xml里的namespace已经指明了接口路径 ![pom文件里也配置了resource源](https://img-ask.csdn.net/upload/201908/15/1565881159_416309.png) ## pom文件里也配置了resource源 ========================================================================================================================================== # 详细代码已经贴在下方,只选了几个配置文件及mapper接口类,service及controller应该没关系就没传! ============================================= # mybatis-config.xml ``` <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!--添加缓存 引入第三方二级缓存 --> <settings> <setting name="mapUnderscoreToCamelCase" value="true"/> <setting name="cacheEnabled" value="false"/> </settings> <!-- 配置数据源 default默认使用的数据源 --> <environments default="mysql"> <environment id="mysql"> <transactionManager type="JDBC" /> <dataSource type="POOLED"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///orderuser"/> <property name="username" value="zhijia3278"/> <property name="password" value="0528"/> </dataSource> </environment> </environments> <!-- 映射文件 --> <mappers> <mapper resource="OrderUserMapper.xml"/> </mappers> </configuration> ``` # OrderUserMapper.java ``` package cn.tedu.mapper; import cn.tedu.domain.Order; import cn.tedu.domain.User; public interface OrderUserMapper { public User queryUser(String userId); public Order queryOrder(String orderId); public void updateUserPoints(User user); } ``` # OrderUserMapper.xml ``` <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="cn.tedu.mapper.OrderUserMapper"> <select id="queryUser" parameterType="String" resultType="User"> select * from t_user where user_id=#{userId} </select> <select id="queryOrder" parameterType="String" resultType="Order"> select * from t_order where order_id=#{orderId} </select> <update id="updateUserPoints" parameterType="User"> update t_user set points=#{points} where user_id=#{userId} </update> </mapper> ``` # spring.xml ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 配置内容 --> <context:component-scan base-package="cn.tedu"> </context:component-scan> <context:annotation-config></context:annotation-config> <!-- 持久层数据源 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <!-- 4个属性 --> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///orderuser"/> <property name="username" value="zhijia3278"/> <property name="password" value="0528"/> </bean> <!-- sqlSession --> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 数据源注入 --> <property name="dataSource" ref="dataSource"/> <!-- 扫描mybatis的独立配置文件 关闭二级缓存,驼峰命名 --> <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/> <!-- 映射文件扫描 --> <property name="mapperLocations" value="classpath:mapper/OrderUserMapper.xml" /> <!-- 别名包 --> <property name="typeAliasesPackage" value="cn.tedu.domain"></property> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 扫描的接口包 cn.tedu.mapper --> <property name="basePackage" value="cn.tedu.mapper"/> </bean> <!-- 注解驱动开启,@RequestMapping @RequestParam等 --> <mvc:annotation-driven/> <!-- 防止静态文件js css html访问被dispacherServlet拦截 --> <!-- localhost静态文件根目录 /static /js /css --> <!-- mapping 满足什么样子的访问地址 http://localhost:8080/js//1.js --> <mvc:resources location="/" mapping="/**"></mvc:resources> </beans> ``` # springmvc-servlet ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 配置内容 --> <context:component-scan base-package="cn.tedu"/> <!-- 注解驱动开启,@RequestMapping @RequestParam等 --> <mvc:annotation-driven/> <!-- 防止静态文件js css html访问被dispacherServlet拦截 --> <!-- localhost静态文件根目录 /static /js /css --> <!-- mapping 满足什么样子的访问地址 http://localhost:8080/js//1.js --> <mvc:resources location="/" mapping="/**"></mvc:resources> </beans> ``` # web.xml ``` <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- tomcat启动加载spring.xml --> <!-- <init-param>--> <!-- <param-name>contextConfigLocation</param-name>--> <!-- <param-value>classpath:springmvc/springmvc-servlet.xml</param-value>--> <!-- </init-param>--> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app> ``` # pom.xml ``` <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>cn.tedu</groupId> <artifactId>SSMDemo</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>SSM-DEMO01 Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <!-- <dependency>--> <!-- <groupId>junit</groupId>--> <!-- <artifactId>junit</artifactId>--> <!-- <version>4.12</version>--> <!-- <scope>compile</scope>--> <!-- </dependency>--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.13.RELEASE</version> </dependency> <!-- datasource --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.14</version> </dependency> <!-- spring mysql --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.13.RELEASE</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.0.8</version> </dependency> <!-- mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.5</version> </dependency> <!-- spring mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!-- springmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.3.13.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.13.RELEASE</version> </dependency> <!-- jackson --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.8.8</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.8.8</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.8.8</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> </dependencies> <build> <finalName>SSM-DEMO01</finalName> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <!-- 插件属性配置 --> <configuration> <!-- 端口 --> <port>8080</port> <!-- 项目访问路径 --> <path>/</path> <!-- 编解码 --> <uriEncoding>utf-8</uriEncoding> <useBodyEncodingForURI>true</useBodyEncodingForURI> </configuration> </plugin> </plugins> <resources> <resource> <directory>resource</directory> <includes> <include>**/*.xml</include> <include>mapper/*.xml</include> <include>mybatis/*.xml</include> <include>spring/*.xml</include> </includes> <!-- <filtering>true</filtering>--> </resource> </resources> </build> </project> ```

spirng注解事务 @Transactional 放到类上生效, 放到方法上不生效

1.框架springMVC+mybatis, 数据库mysql 2.mybatis采用mapper代理方式执行sql(即只定义了Mapper接口和mapper文件) 3.service注解的扫描 只在 applicationContxt.xml中扫描, spring-mvc.xml中已经排除出去 4.自己故意抛出一个运行时异常,如 int a = 1/0; 当@Transactional 放到方法上时, 1/0报错, 但是执行的sql却没有回滚,且日志中打出: "Closing non transactional SqlSession",意思好像是sqlSession没有被事务管理; 当@Transactional 放到类上时,1/0报错, 但是事务生效了, 回滚了, 请问,这是什么原因呢

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轻松等回家通知

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实时更新:计算机编程语言排行榜—TIOBE世界编程语言排行榜(2020年6月份最新版)

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