MyBatis插入数据时报“Try setting a different JdbcType for this parameter or a different jdbcTypeForNull”错误

一、现象描述

今天在开发过程中遇到一个问题就是使用MyBatis插入数据时，死活插不进去。数据都有传递啊，为啥啊？碰到这些问题总有点懵逼，具体报错信息如下：

org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: org.apache.ibatis.type.TypeException: Error setting null for parameter #3 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型
### The error may exist in UserMapper.xml
### The error may involve com.queen.mybatis.mapper.UserMapper.addUserMap-Inline
### The error occurred while setting parameters
### SQL: insert into   t_user(id,loginId,userName,role,note)   values(?,?,?,?,?)
### Cause: org.apache.ibatis.type.TypeException: Error setting null for parameter #3 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:154)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:141)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:51)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
	at com.sun.proxy.$Proxy2.addUserMap(Unknown Source)
	at com.queen.mybatis.MyBatisTest.testAdd(MyBatisTest.java:41)
	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:45)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
	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.junit.runners.ParentRunner.run(ParentRunner.java:300)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	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)
Caused by: org.apache.ibatis.type.TypeException: Error setting null for parameter #3 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型
	at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:45)
	at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:81)
	at org.apache.ibatis.executor.statement.PreparedStatementHandler.parameterize(PreparedStatementHandler.java:80)
	at org.apache.ibatis.executor.statement.RoutingStatementHandler.parameterize(RoutingStatementHandler.java:61)
	at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:74)
	at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:47)
	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:105)
	at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:71)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:152)
	... 28 more
Caused by: java.sql.SQLException: 无效的列类型
	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
	at oracle.jdbc.driver.OracleStatement.getInternalType(OracleStatement.java:3424)
	at oracle.jdbc.driver.OraclePreparedStatement.setNullCritical(OraclePreparedStatement.java:4197)
	at oracle.jdbc.driver.OraclePreparedStatement.setNull(OraclePreparedStatement.java:4186)
	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.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:70)
	at com.sun.proxy.$Proxy4.setNull(Unknown Source)
	at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:43)
	... 36 more

二、解决办法

经过网络的几番搜查，终于发现MyBatis 插入空值时，需要指定JdbcType ，否则会报错。

没有修改之前的XML文件，我的note这个字段在传递的时候是没有指定传值的，如下：

	
		select SEQ_T_USER_ID.nextval from dual
	
	insert into
	t_user(
		id,
		loginId,
		userName,
		role,
		note)
	values(
		#{id},
		#{loginId},
		#{userName},
		#{role},
		#{note}
	)

修改之后如下：

	
		select SEQ_T_USER_ID.nextval from dual
	
	insert into
	t_user(
		id,
		loginId,
		userName,
		role,
		note)
	values(
		#{id},
		#{loginId,jdbcType=VARCHAR},
		#{userName,jdbcType=VARCHAR},
		#{role,jdbcType=VARCHAR},
		#{note,jdbcType=VARCHAR}
	)

 

这个时候运行正常了。 

 

希望这个问题，对大家都有所帮助。本来也是一件很小的差别。一句话：都怪自己太年轻。