Ubuntu IDEA MyBatis问题

Question

谁能帮我看一下哈
IDEA报错:

/home/qin/.jdks/openjdk-21.0.2/bin/java -javaagent:/media/qin/机械/Work-box/IEDA_Java/idea-IU-233.14015.106/lib/idea_rt.jar=43179:/media/qin/机械/Work-box/IEDA_Java/idea-IU-233.14015.106/bin -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath /home/qin/IdeaProjects/Hello_MyBatis_Test03/target/classes:/home/qin/.m2/repository/org/mybatis/mybatis/3.5.5/mybatis-3.5.5.jar:/home/qin/.m2/repository/com/mysql/mysql-connector-j/8.0.33/mysql-connector-j-8.0.33.jar:/home/qin/.m2/repository/com/google/protobuf/protobuf-java/3.21.9/protobuf-java-3.21.9.jar:/home/qin/.m2/repository/org/slf4j/slf4j-api/1.7.20/slf4j-api-1.7.20.jar:/home/qin/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/home/qin/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar org.example.Pojo.MyBatisDemo
03:00:10.874 [main] DEBUG org.apache.ibatis.logging.LogFactory - Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.
03:00:10.882 [main] DEBUG org.apache.ibatis.io.VFS - Class not found: org.jboss.vfs.VFS
03:00:10.882 [main] DEBUG org.apache.ibatis.io.JBoss6VFS - JBoss 6 VFS API is not available in this environment.
03:00:10.883 [main] DEBUG org.apache.ibatis.io.VFS - Class not found: org.jboss.vfs.VirtualFile
03:00:10.884 [main] DEBUG org.apache.ibatis.io.VFS - VFS implementation org.apache.ibatis.io.JBoss6VFS is not valid in this environment.
03:00:10.885 [main] DEBUG org.apache.ibatis.io.VFS - Using VFS adapter org.apache.ibatis.io.DefaultVFS
03:00:10.947 [main] DEBUG org.apache.ibatis.datasource.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
03:00:10.948 [main] DEBUG org.apache.ibatis.datasource.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
03:00:10.948 [main] DEBUG org.apache.ibatis.datasource.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
03:00:10.949 [main] DEBUG org.apache.ibatis.datasource.pooled.PooledDataSource - PooledDataSource forcefully closed/removed all connections.
Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.
### The error may exist in UserMapper.xml
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource UserMapper.xml
    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:64)
    at org.example.Pojo.MyBatisDemo.main(MyBatisDemo.java:17)
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource UserMapper.xml
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:122)
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:99)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:78)
    ... 2 more
Caused by: java.io.IOException: Could not find resource UserMapper.xml
    at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:114)
    at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:100)
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement(XMLConfigBuilder.java:374)
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:120)
    ... 4 more

进程已结束，退出代码为 1

主要是:

Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.
### The error may exist in UserMapper.xml
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource UserMapper.xml
    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:64)
    at org.example.Pojo.MyBatisDemo.main(MyBatisDemo.java:17)
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource UserMapper.xml
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:122)
    at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:99)
    at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:78)
    ... 2 more

本人试过各种教程,都不行,有谁知道怎么解决吗?
项目结构图:

Pojo两个类文件内容:
1.User类

package org.example.Pojo;

public class User {
    private int id;

    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 getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddr() {
        return addr;
    }

    public void setAddr(String addr) {
        this.addr = addr;
    }

    private String username;
    private String password;
    private String gender;
    private String addr;
}

2.MyBatisDemo类

package org.example.Pojo;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MyBatisDemo {
    public static void main(String[] args) throws IOException {
        //1. 加载mybatis的核心配置文件，获取 SqlSessionFactory
        String resource = "./logback/mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

        //2. 获取SqlSession对象，用它来执行sql
        SqlSession sqlSession = sqlSessionFactory.openSession();
        //3. 执行sql
        List<User> users = sqlSession.selectList("test.selectAll");
        //参数是一个字符串，该字符串必须是映射配置文件的namespace.id
        System.out.println(users);
        //4. 释放资源
        sqlSession.close();
    }
}

resources资源配置文件下的MyBatis配置文件logbacka里的两个xml文件:
1.mybatis-config.xml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">
<configuration>

        <typeAliases>
                <package name="src.main.java.org.example.Pojo"/>
        </typeAliases>

        <environments default="development">
                <environment id="development">
                        <transactionManager type="JDBC"/>
                        <dataSource type="POOLED">
                                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=false"/>
                                <property name="username" value="root"/>
                                <property name="password" value="1234"/>
                        </dataSource>
                </environment>
                <environment id="test">
                        <transactionManager type="JDBC"/>
                        <dataSource type="POOLED">
                                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=false"/>
                                <property name="username" value="root"/>
                                <property name="password" value="1234"/>
                        </dataSource>
                </environment>
        </environments>

        <mappers>
                <mapper resource="UserMapper.xml"/>
        </mappers>
</configuration>

2.UserMapper.xml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="test">

         <select id="selectAll" resultType="org/example/Pojo/User.java">
             select * from tb_user;
        </select>

</mapper>

Maven结构文件:

<?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>org.example</groupId>
    <artifactId>Hello_MyBatis_Test03</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!--在build中配置resources,来防止我们资源导出失败的问题-->
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/java/org/example</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>


    <dependencies>



        <!--mybatis 依赖-->
        <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.5</version>

    </dependency>

        <!--mysql 驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.33</version>
    </dependency>

        <!--junit 单元测试-->
        <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13</version>
        <scope>test</scope>

    </dependency>

        <!-- 添加slf4j日志api -->
        <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.20</version>
        </dependency>
        <!-- 添加logback-classic依赖 -->
        <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.3</version>
        </dependency>
        <!-- 添加logback-core依赖 -->
        <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
        <version>1.2.3</version>

    </dependency>
    </dependencies>

    <properties>
        <maven.compiler.source>21</maven.compiler.source>
        <maven.compiler.target>21</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

</project>

注,这是Ubuntu系统上的IDEA

Answer 1

错误告知你找不到UserMapper.xml文件，
你应该在按照这个目录来
resources
│ ├── application.yaml
│ └── mapper
│ └── UserMapper.xml

在resources下面建个application.yaml或者application.properties文件

在这个结构中, UserMapper.java是mapper接口, UserMapper.xml是mapper XML文件. 它们被放在与它们名字相对应的目录中，方便管理和查找。
最后别忘了在application.yaml或者application.properties中配置Mybatis的mapper文件位置:

mybatis:
  mapper-locations: classpath:mapper/*.xml

或者

mybatis.mapper-locations=classpath:mapper/*.xml

例如，如果你将mapper.xml文件放在resources/mapper目录下，那么配置就是classpath:mapper/*.xml。注意要正确配置，否则SpringBoot无法找到你的mapper.xml文件。