org.apache.ibatis.builder.IncompleteElementException: Could not find result map com.me.mybatis.mapper.OrderMapper.
 at org.apache.ibatis.builder.MapperBuilderAssistant.setStatementResultMap(MapperBuilderAssistant.java:346)
 at org.apache.ibatis.builder.MapperBuilderAssistant.addMappedStatement(MapperBuilderAssistant.java:284)
 at org.apache.ibatis.builder.xml.XMLStatementBuilder.parseStatementNode(XMLStatementBuilder.java:107)
 at org.apache.ibatis.session.Configuration.buildAllStatements(Configuration.java:698)
 at org.apache.ibatis.session.Configuration.hasStatement(Configuration.java:668)
 at org.apache.ibatis.session.Configuration.hasStatement(Configuration.java:663)
 at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:180)
 at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)
 at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)
 at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)
 at com.sun.proxy.$Proxy10.selectOrders(Unknown Source)
 at com.me.mybatis.junit.MybatisMapperTest.testOrderList(MybatisMapperTest.java:187)
 at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.base/java.lang.reflect.Method.invoke(Method.java:567)
 at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:628)
 at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:117)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:184)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:180)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:127)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:68)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
 at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
 at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
 at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
 at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
 at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
 at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
 at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
 at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
 at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
 at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
 at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
 at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
 at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
 at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
 at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:137)
 at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:89)
 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)
Caused by: java.lang.IllegalArgumentException: Result Maps collection does not contain value for com.me.mybatis.mapper.OrderMapper.
 at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:797)
 at org.apache.ibatis.session.Configuration.getResultMap(Configuration.java:550)
 at org.apache.ibatis.builder.MapperBuilderAssistant.setStatementResultMap(MapperBuilderAssistant.java:344)
 ... 64 more

 

 

分析原因：找不到resultmap，然后打开对应的xml文件，发现

 

 

 

两个不一样。因此只需要把resultmap和id的内容一致就可以了。