分析批量插入生成主键失败，解决方案

项目场景：

在开发中，需要通过批量插入，生成主键id，然后进行数据关联操作

问题描述

Caused by: org.apache.ibatis.executor.ExecutorException: Error getting generated key or setting result to parameter object. Cause: org.apache.ibatis.binding.BindingException: Parameter 'id' not found. Available parameters are [forlonList, param1]

at org.apache.ibatis.executor.keygen.Jdbc3KeyGenerator.processBatch(Jdbc3KeyGenerator.java:71)

at org.apache.ibatis.executor.keygen.Jdbc3KeyGenerator.processAfter(Jdbc3KeyGenerator.java:45)

at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:50)

at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)

at com.sun.proxy.$Proxy371.update(Unknown Source)

at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:50)

at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)

at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)

at com.sun.proxy.$Proxy370.update(Unknown Source)

at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)

at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)

... 68 more

Caused by: org.apache.ibatis.binding.BindingException: Parameter 'id' not found. Available parameters are [forlonList, param1]

at org.apache.ibatis.binding.MapperMethod$ParamMap.get(MapperMethod.java:186)

at org.apache.ibatis.reflection.wrapper.MapWrapper.getSetterType(MapWrapper.java:85)

at org.apache.ibatis.reflection.MetaObject.getSetterType(MetaObject.java:97)

at org.apache.ibatis.executor.keygen.Jdbc3KeyGenerator.getTypeHandlers(Jdbc3KeyGenerator.java:108)

at org.apache.ibatis.executor.keygen.Jdbc3KeyGenerator.processBatch(Jdbc3KeyGenerator.java:65)

... 93 more

批量插入后，生成主键失败，说是没有匹配到这个参数

ForlanDao.java

int batchInsert(@Param("forlonList") List forlonList);

ForlanMapper.xml

INSERT INTO

Forlan(name,remark)

VALUES

(#{item.name},#{item.remark})

原因分析：

这里使用的是1.3.1版本，目前发现是版本问题，其它版本是正常的

解决方案：

本质就是，需要把foreach标签中的collection属性值改为list

修改dao和mapper里面的forlonList为listForlanDao.java

int batchInsert(@Param("list") List forlonList);

ForlanMapper.xml

INSERT INTO

Forlan(name,remark)

VALUES

(#{item.name},#{item.remark})

去掉@Param注解，修改collection=“list”ForlanDao.java

int batchInsert(List forlonList);

ForlanMapper.xml

INSERT INTO

Forlan(name,remark)

VALUES

(#{item.name},#{item.remark})

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