Mybatis：使用bean传值，当传入值为Null时，提示“无效的列类型”的解决办法

问题描述：

在使用mybatis对数据库执行更新操作时，parameterType为某个具体的bean，而bean中传入的参数为null时，抛出异常如下：

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='pxh', mode=IN, javaType=class java.lang.Long, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting null for parameter #5 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: 1111
    at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:76)
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:399)
    at com.sun.proxy.$Proxy10.insert(Unknown Source)
    at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:253)
    at com.hsoft.mss.xtgl.dao.impl.GnzyDaoImpl.updateGnzy(GnzyDaoImpl.java:69)
    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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:201)
    at com.sun.proxy.$Proxy28.updateGnzy(Unknown Source)
    at com.hsoft.mss.xtgl.service.impl.GnzyServiceImpl.updateGnzy(GnzyServiceImpl.java:73)
    at com.hsoft.mss.xtgl.controller.GnzyController.updateGnzy(GnzyController.java:316)
    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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:775)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:965)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:867)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:841)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='pxh', mode=IN, javaType=class java.lang.Long, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting null for parameter #5 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型: 1111
    at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:89)
    at org.apache.ibatis.executor.statement.PreparedStatementHandler.parameterize(PreparedStatementHandler.java:85)
    at org.apache.ibatis.executor.statement.RoutingStatementHandler.parameterize(RoutingStatementHandler.java:63)
    at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:77)
    at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:48)
    at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:115)
    at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:75)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)
    at com.sun.proxy.$Proxy40.update(Unknown Source)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:170)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:157)
    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.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)
    ... 56 more
Caused by: org.apache.ibatis.type.TypeException: Error setting null for parameter #5 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: 1111
    at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:47)
    at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:87)
    ... 75 more
Caused by: java.sql.SQLException: 无效的列类型: 1111
    at oracle.jdbc.driver.OracleStatement.getInternalType(OracleStatement.java:3900)
    at oracle.jdbc.driver.OraclePreparedStatement.setNullCritical(OraclePreparedStatement.java:4406)
    at oracle.jdbc.driver.OraclePreparedStatement.setNull(OraclePreparedStatement.java:4388)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.setNull(OraclePreparedStatementWrapper.java:1281)
    at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_setNull(FilterChainImpl.java:2733)
    at com.alibaba.druid.filter.FilterAdapter.preparedStatement_setNull(FilterAdapter.java:1286)
    at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_setNull(FilterChainImpl.java:2730)
    at com.alibaba.druid.proxy.jdbc.PreparedStatementProxyImpl.setNull(PreparedStatementProxyImpl.java:397)
    at com.alibaba.druid.pool.DruidPooledPreparedStatement.setNull(DruidPooledPreparedStatement.java:266)
    at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:45)

mapper文件中代码如下：

<update id="update" parameterType="com.hsoft.mss.xtgl.model.Bean">
        update table
        <set>
                pxh  = #{pxh},    // 当pxh传入null时，抛出上述异常，pxh在bean中的类型为Long
                time = sysdate
        </set>
        where id = #{id}
</update>

解决办法一：

经过对代码分析，是由于未指定传入参数pxh的类型，当mybatis接收到null时，无法将其正确的进行解析，进而导致上述异常。

将mapper中代码修改如下：

<update id="update" parameterType="com.hsoft.mss.xtgl.model.Bean">
        update table
        <set>
                pxh  = #{pxh,jdbcType=NUMERIC}, //将pxh的类型指定为NUMERIC即可
                time = sysdate
        </set>
        where id = #{id,jdbcType=VARCHAR}
</update>

解决办法二：

在配置文件mybatis-config.xml中加入如下代码：

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">  
<configuration>  
       ... 
    <settings>
        <setting name="jdbcTypeForNull" value="NULL" />
    </settings>
       ... 
</configuration>

这样，即使传入参数为null，mybatis也能够将其转换成正确的数据类型，并进行存储操作。

附：常见的Jdbc Type 与 Java Type之间的关系

JDBC Type            Java Type  
CHAR                 String  
VARCHAR              String  
LONGVARCHAR          String  
NUMERIC              java.math.BigDecimal  
DECIMAL              java.math.BigDecimal  
BIT                  boolean  
BOOLEAN              boolean  
TINYINT              byte  
SMALLINT             short  
INTEGER              int  
BIGINT               long  
REAL                 float  
FLOAT                double  
DOUBLE               double  
BINARY               byte[]  
VARBINARY            byte[]  
LONGVARBINARY        byte[]  
DATE                 java.sql.Date  
TIME                 java.sql.Time  
TIMESTAMP            java.sql.Timestamp  
CLOB                 Clob  
BLOB                 Blob  
ARRAY                Array