mybatis执行test07测试类却显示test05测试类调用的sql语句出错
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1.测试类 @Test public void test07() { IStudentDao studentDao = new IStudentDaoImpl(); Student student = studentDao.selectStudentById(10); System.out.println("查找成功!"); System.out.println(student.toString()); }
2.IStudentDao接口 @Override public Student selectStudentById(int id) { SqlSession sqlSession = null; try { sqlSession = mysqlSession.getSqlSession(); Student student = sqlSession.selectOne("selectId",id); return student; } catch (IOException e) { e.printStackTrace(); }finally { if(sqlSession!=null){ sqlSession.close(); } } return null; }
3.mapper.xml
... <select id="selectAll" resultType="com.abc.beans.Student"> select * from student </select> <!--根据姓名查询全部学生信息Map --> <select id="selectAll" resultType="com.abc.beans.Student" parameterType="String"> select * from student where name = #{name} </select> <select id="selectId" resultType="com.abc.beans.Student"> select * from student where id = #{id} </select>
...
问题,调用test07测试,用的是
<select id="selectId" resultType="com.abc.beans.Student">
select * from student where id = #{id}
</select>
但是错误提示是selectAll边出问题了,最后才发现是自己大意写了两个Id名为selectAll
报错信息:
org.apache.ibatis.exceptions.PersistenceException: ### Error building SqlSession. ### The error may exist in com/abc/dao/IStudentDao.xml ### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is ‘com/abc/dao/IStudentDao.xml‘. Cause: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for org.mybatis.example.BlogMapper.selectAll at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:52) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:36) at com.abc.utils.MySqlSession.getSqlSession(MySqlSession.java:16) at com.abc.dao.IStudentDaoImpl.selectStudentById(IStudentDaoImpl.java:132) at com.abc.AppTest.test07(AppTest.java:90) 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$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$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: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is ‘com/abc/dao/IStudentDao.xml‘. Cause: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for org.mybatis.example.BlogMapper.selectAll at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:121) at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:99) at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:50) ... 26 more Caused by: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is ‘com/abc/dao/IStudentDao.xml‘. Cause: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for org.mybatis.example.BlogMapper.selectAll at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:120) at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:92) at org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement(XMLConfigBuilder.java:373) at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:119) ... 28 more Caused by: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for org.mybatis.example.BlogMapper.selectAll at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:872) at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:844) at org.apache.ibatis.session.Configuration.addMappedStatement(Configuration.java:668) at org.apache.ibatis.builder.MapperBuilderAssistant.addMappedStatement(MapperBuilderAssistant.java:302) at org.apache.ibatis.builder.xml.XMLStatementBuilder.parseStatementNode(XMLStatementBuilder.java:109) at org.apache.ibatis.builder.xml.XMLMapperBuilder.buildStatementFromContext(XMLMapperBuilder.java:135) at org.apache.ibatis.builder.xml.XMLMapperBuilder.buildStatementFromContext(XMLMapperBuilder.java:128) at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:118) ... 31 more
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