org.apache.ibatis.exceptions.PersistenceException:

报错如下：
- 错误代码提示：
- 错误信息中的关键信息：
- 翻译：
- 源代码如下：
- 错误分析：
- 解决：
报错如下：
- 错误代码提示：
- 错误信息中的关键信息：
- 翻译：
- 错误分析：
- 解决：
- - 运行之后，发现代码还是异常！！！
  - 解决：

报错如下：

错误代码提示：

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.mapper.GoodsMapper.listALL
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.mapper.GoodsMapper.listALLat org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:149)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:135)at com.test.Demo.test1(Demo.java:24)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:59)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)at org.junit.runners.ParentRunner.run(ParentRunner.java:413)at org.junit.runner.JUnitCore.run(JUnitCore.java:137)at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.mapper.GoodsMapper.listALLat org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:1031)at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:821)at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:814)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:146)... 28 moreProcess finished with exit code -1

错误信息中的关键信息：

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.mapper.GoodsMapper.listALL
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.mapper.GoodsMapper.listALL

翻译：

org.apache.ibatis.exceptions.PersistenceException:查询数据库错误。原因:java.lang.IllegalArgumentException: Mapped Statements集合不包含com.mapper.GoodsMapper.listALL的值原因:java.lang.IllegalArgumentException: Mapped Statements集合不包含com.mapper.GoodsMapper.listALL的值

源代码如下：

package com.test;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 org.junit.Test;import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Map;public class Demo {@Testpublic void test1() throws IOException {String resource = "mybatis-config.xml";InputStream inputStream = Resources.getResourceAsStream(resource);SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);SqlSession session = sqlSessionFactory.openSession();System.out.println("session:"+session);List<Map> goodsList= session.selectList("com.mapper.GoodsMapper.listALL"); //错误代码//List<Map> goodsList= session.selectList("com.mapper.GoodsMapper.listAll");  //正确代码System.out.println("goodList"+goodsList);for(Map map:goodsList){System.out.println(map);}session.close();}
}

错误分析：

查询数据库错误。原因:java.lang.IllegalArgumentException: Mapped Statements集合不包含com.mapper.GoodsMapper.listALL的值。

通过代码错误提示信息,找到我们调用的xml代码文件中定义的listAll:

对比之后，不难发现错误的原因是代码中的单词： listALL 导致的错误！

解决：

将代码中的listALL修改为listAll之后，运行代码：

报错如下：

错误代码提示：

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: java.sql.SQLException: Error setting driver on UnpooledDataSource. Cause: java.lang.ClassNotFoundException: Cannot find class: com.mysql.cj.jdbc.Driver
### The error may exist in com/mapper/StudentInfoMapper.xml
### The error may involve com.mapper.StudentInfoMapper.listAll
### The error occurred while executing a query
### Cause: java.sql.SQLException: Error setting driver on UnpooledDataSource. Cause: java.lang.ClassNotFoundException: Cannot find class: com.mysql.cj.jdbc.Driverat org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:149)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:135)at com.test.StudentTest.testListAll(StudentTest.java:27)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:59)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)at org.junit.runners.ParentRunner.run(ParentRunner.java:413)at org.junit.runner.JUnitCore.run(JUnitCore.java:137)at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
Caused by: java.sql.SQLException: Error setting driver on UnpooledDataSource. Cause: java.lang.ClassNotFoundException: Cannot find class: com.mysql.cj.jdbc.Driverat org.apache.ibatis.datasource.unpooled.UnpooledDataSource.initializeDriver(UnpooledDataSource.java:244)at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:223)at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:219)at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.getConnection(UnpooledDataSource.java:95)at org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:432)at org.apache.ibatis.datasource.pooled.PooledDataSource.getConnection(PooledDataSource.java:89)at org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:139)at org.apache.ibatis.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:61)at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:337)at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:86)at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:325)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:89)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)... 28 moreProcess finished with exit code -1

错误信息中的关键信息：

org.apache.ibatis.exceptions.PersistenceException: Caused by:java.sql.SQLException: Error setting driver on UnpooledDataSource.Cause: java.lang.ClassNotFoundException:
Cannot find class: com.mysql.cj.jdbc.Driver

翻译：

org.apache.ibatis.exceptions.PersistenceException:引起的:UnpooledDataSource上的错误设置驱动程序。原因:java.lang.ClassNotFoundException:不能找到类:com.mysql.cj.jdbc.Driver

错误分析：

原因:java.lang.ClassNotFoundException:不能找到类:com.mysql.cj.jdbc.Driver
通过代码错误提示信息,找到我们修改的xxxxMapper.xml代码文件中定义的sql语句，发现未修改官网模板代码：

解决：

将代码中的sql语句修改为正确后运行代码：

运行之后，发现代码还是异常！！！

接着，继续分析错误原因：
UnpooledDataSource上的错误设置驱动程序。

原因:java.lang.ClassNotFoundException:

不能找到类:com.mysql.cj.jdbc.Driver 不能找到mysql驱动类

解决：

引入mysql jar包依赖，运行：

// A code block
var foo = 'bar';