Mybatis：Mapper method attempted to return null from a method with a primitive return type (int)
Mybatis中 Mapper method attempted to return null from a method with a primitive return type (int)错误
本人是在进行插入操作的时候发生的错误，相应的删除和修改都是同样的道理
<select id="saveEmpInfo" resultType="int">INSERT INTO emp(eId,eName,did) VALUES(#{eId},#{eName},#{did})</select >
错误提示：
org.apache.ibatis.binding.BindingException: Mapper method 'com.xa.dao.EmpDaoMapper.saveEmpInfo attempted to return null from a method with a primitive return type (int).
正确写法：
<insert id="saveEmpInfo">INSERT INTO emp(eId,eName,did) VALUES(#{eId},#{eName},#{did})</insert>
原因分析
增加：<insert></insert>
删除：<delete></delete>
修改：<update></update>
查询：<select></select>
其中，增删改都不需要添加resultType="int"
效果：
修改前：
修改后：
修改日志：
由图可见：eId为16的员工信息发生了修改
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