懒加载全局变量报持久化异常
学生接口
```java
/**
* 分步查询学生信息
* @param sid
* @return
*/
Student selectByIdStep(@Param("sid") Integer sid);
学生接口映射文件
<resultMap id="studentResultMapStep" type="Student">
<id property="sid" column="sid"/>
<result property="sname" column="sname" />
<association property="clazz" select="com.fei.mybatis.mapper.ClazzMapper.selectByIdStep" column="cid"/>
</resultMap>
<select id="selectByIdStep" resultMap="studentResultMapStep">
select sid,sname,cid from t_student
<where>sid = #{sid}</where>
</select>
单元测试
@Test
public void selectByIdStep(){
SqlSession sqlSession = SqlSessionUtils.openSession();
StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
Student student = mapper.selectByIdStep(5);
System.out.println(student.getSname());
//懒加载
System.out.println(student.getClazz().getCname());
sqlSession.close();
}
mybatis-config.xml文件，不打开懒加载全局配置，就可以分步查询没有出错，但开启了全局配置就会报错
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<properties resource="jdbc.properties"/>
<settings>
<setting name="lazyLoadingEnabled " value="true"/>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
<typeAliases>
<package name="com.fei.mybatis.bean"/>
</typeAliases>
<environments default="db1">
<environment id="db1">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<package name="com.fei.mybatis.mapper"/>
</mappers>
</configuration>
开启报的持久化异常
D:\Java\jdk1.8.0_333\bin\java.exe -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:D:\java\JetBrains\IntelliJ IDEA 2021.3\lib\idea_rt.jar=63319:D:\java\JetBrains\IntelliJ IDEA 2021.3\bin" -Dfile.encoding=UTF-8 -classpath "D:\java\JetBrains\IntelliJ IDEA 2021.3\lib\idea_rt.jar;D:\java\JetBrains\IntelliJ IDEA 2021.3\plugins\junit\lib\junit5-rt.jar;D:\java\JetBrains\IntelliJ IDEA 2021.3\plugins\junit\lib\junit-rt.jar;D:\java\jdk1.8.0_333\jre\lib\charsets.jar;D:\java\jdk1.8.0_333\jre\lib\deploy.jar;D:\java\jdk1.8.0_333\jre\lib\ext\access-bridge-64.jar;D:\java\jdk1.8.0_333\jre\lib\ext\cldrdata.jar;D:\java\jdk1.8.0_333\jre\lib\ext\dnsns.jar;D:\java\jdk1.8.0_333\jre\lib\ext\jaccess.jar;D:\java\jdk1.8.0_333\jre\lib\ext\jfxrt.jar;D:\java\jdk1.8.0_333\jre\lib\ext\localedata.jar;D:\java\jdk1.8.0_333\jre\lib\ext\nashorn.jar;D:\java\jdk1.8.0_333\jre\lib\ext\sunec.jar;D:\java\jdk1.8.0_333\jre\lib\ext\sunjce_provider.jar;D:\java\jdk1.8.0_333\jre\lib\ext\sunmscapi.jar;D:\java\jdk1.8.0_333\jre\lib\ext\sunpkcs11.jar;D:\java\jdk1.8.0_333\jre\lib\ext\zipfs.jar;D:\java\jdk1.8.0_333\jre\lib\javaws.jar;D:\java\jdk1.8.0_333\jre\lib\jce.jar;D:\java\jdk1.8.0_333\jre\lib\jfr.jar;D:\java\jdk1.8.0_333\jre\lib\jfxswt.jar;D:\java\jdk1.8.0_333\jre\lib\jsse.jar;D:\java\jdk1.8.0_333\jre\lib\management-agent.jar;D:\java\jdk1.8.0_333\jre\lib\plugin.jar;D:\java\jdk1.8.0_333\jre\lib\resources.jar;D:\java\jdk1.8.0_333\jre\lib\rt.jar;D:\java\IdeaProjects\mybatis\mybatis-005-advanced-mapping\target\test-classes;D:\java\IdeaProjects\mybatis\mybatis-005-advanced-mapping\target\classes;D:\java\MavenRepository\mysql\mysql-connector-java\8.0.30\mysql-connector-java-8.0.30.jar;D:\java\MavenRepository\com\google\protobuf\protobuf-java\3.19.4\protobuf-java-3.19.4.jar;D:\java\MavenRepository\org\mybatis\mybatis\3.5.10\mybatis-3.5.10.jar;D:\java\MavenRepository\junit\junit\4.11\junit-4.11.jar;D:\java\MavenRepository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;D:\java\MavenRepository\ch\qos\logback\logback-classic\1.2.11\logback-classic-1.2.11.jar;D:\java\MavenRepository\ch\qos\logback\logback-core\1.2.11\logback-core-1.2.11.jar;D:\java\MavenRepository\org\slf4j\slf4j-api\1.7.32\slf4j-api-1.7.32.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit4 com.fei.mybatis.test.StudentMapperTest,selectByIdStep
java.lang.ExceptionInInitializerError
at com.fei.mybatis.test.StudentMapperTest.selectByIdStep(StudentMapperTest.java:13)
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.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$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: org.apache.ibatis.exceptions.PersistenceException:
### Error building SqlSession.
### The error may exist in SQL Mapper Configuration
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: The setting lazyLoadingEnabled is not known. Make sure you spelled it correctly (case sensitive).
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:82)
at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:66)
at com.fei.mybatis.utils.SqlSessionUtils.<clinit>(SqlSessionUtils.java:23)
... 25 more
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: The setting lazyLoadingEnabled is not known. Make sure you spelled it correctly (case sensitive).
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:80)
... 27 more
Caused by: org.apache.ibatis.builder.BuilderException: The setting lazyLoadingEnabled is not known. Make sure you spelled it correctly (case sensitive).
at org.apache.ibatis.builder.xml.XMLConfigBuilder.settingsAsProperties(XMLConfigBuilder.java:135)
at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:107)
... 29 more
Process finished with exit code -1
```
