mybatis-plus的版本号是 2.0.1,在调用自身的insert(T)的时候没有报错，但是执行update报错，调用selectById、deleteById的时候也报错。也就是涉及到需要主键识别的都报错。
语句如下:(接口与实现都是MP自己实现的)
???????User selectById = userMapper1.selectById("ceshi"); ???????userMapper1.deleteById("ceshi");报错信息如下:
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): cn.xm.jwxt.ceshi.mapper.UserMapper.deleteById ???at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:230) ???at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:48) ???at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:65) ???at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58) ???at com.sun.proxy.$Proxy18.deleteById(Unknown Source) ???at cn.xm.jwxt.ceshi.MpTest.test1(MpTest.java:30) ???at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ???at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ???at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ???at java.lang.reflect.Method.invoke(Method.java:606) ???at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) ???at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) ???at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) ???at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) ???at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) ???at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) ???at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) ???at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) ???at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254) ???at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89) ???at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) ???at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) ???at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) ???at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) ???at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) ???at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) ???at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) ???at org.junit.runners.ParentRunner.run(ParentRunner.java:292) ???at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193) ???at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) ???at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) ???at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) ???at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) ???at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) ???at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
原因:如果是自己手写的接口，没写SQL或者说是SQL的XML的namespace写错的话可以找出原因，可是这是MP自己实现的，自己都没动接口。
经检查，在实体类中，不对主键字段添加 @TableId("数据库字段名称") 注解的话，在调用涉及id的自带方法时就出现此错误。估计是mybatis-plus无法识别主键字段。
解决办法：声明数据库的主键列名称就可以了
所以，建议如果使用Mybatis-Plus的话，最好在实体类中详细注解好表名称(@TableName)、表主键(@TableId)，以免出现这种很难找到原因的错误。
另：据说新版本mybatis-plus已经解决此问题
mybatis-plus调用自身的 ?selectById ??方法报错:org.apache.ibatis.binding.BindingException:
原文地址：https://www.cnblogs.com/qlqwjy/p/10012849.html