org.apache.ibatis.builder.IncompleteElementException: Could not find result map com.itcast.mapper.UserMapper.User
at org.apache.ibatis.builder.MapperBuilderAssistant.getStatementResultMaps(MapperBuilderAssistant.java:346)
at org.apache.ibatis.builder.MapperBuilderAssistant.addMappedStatement(MapperBuilderAssistant.java:290)
at org.apache.ibatis.builder.xml.XMLStatementBuilder.parseStatementNode(XMLStatementBuilder.java:109)
at org.apache.ibatis.session.Configuration.buildAllStatements(Configuration.java:775)
at org.apache.ibatis.session.Configuration.hasStatement(Configuration.java:745)
at org.apache.ibatis.session.Configuration.hasStatement(Configuration.java:740)
at org.apache.ibatis.binding.MapperMethodSqlCommand.<init>(MapperMethod.java:217)atorg.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:48)atorg.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:65)atorg.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58)atcom.sun.proxy.Proxy5.loginUser(Unknown Source)
at com.itcast.mapper.UserMapperTest.testLoginUser(UserMapperTest.java:47)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
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.ParentRunner2.evaluate(ParentRunner.java:268)atorg.junit.runners.ParentRunner.run(ParentRunner.java:363)atorg.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)atorg.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)atorg.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)atorg.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)atorg.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)atorg.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)Causedby:java.lang.IllegalArgumentException:ResultMapscollectiondoesnotcontainvalueforcom.itcast.mapper.UserMapper.Useratorg.apache.ibatis.session.ConfigurationStrictMap.get(Configuration.java:875)
at org.apache.ibatis.session.Configuration.getResultMap(Configuration.java:627)
at org.apache.ibatis.builder.MapperBuilderAssistant.getStatementResultMaps(MapperBuilderAssistant.java:344)
… 35 more
解决方法，细心
解决办法:
上述标黄线处代码更改为: resultType
更改后,发现程序能够正常运行
resultType和resultMap区别:
相同点:resultType和resultMap都映射到了User对象中
不同点:
1.resultType对应的是java对象中的属性，大小写不敏感，
2.resultType如果放的是java.lang.Map,key是查询语句的列名，value是查询的值，大小写敏感
3.resultMap:指的是定义好了的id的，是定义好的resyltType的引用
注意：用resultType的时候，要保证结果集的列名与java对象的属性相同，而resultMap则不用，而且resultMap可以用typeHander转换
4.type:java 对象对应的类，id:在本文件要唯一column :数据库的列名或别名，property:对应java对象的属性，jdbcType:java.sql.Types
查询语句中，resultMap属性指向上面那个属性的标签的id
parameterType:参数类型，只能传一个参数，如果有多个参数要封装，如封装成一个类，要写包名加类名，基本数据类型则可以省略
5.一对1、一对多时，若有表的字段相同必须写别名，不然查询结果无法正常映射，出现某属性为空或者返回的结果与想象中的不同，而这往往是没有报错的。
