解决异常:Cause: java.sql.SQLException: Field 'id' doesn't have a default value

编写简单代码往数据库里用户表添加数据

        @Override

public Integer saveUserHasKey(User user) {

SqlSession session=null;

Integer result=0;

try {

session= factory.openSession(true);// 默认获取的session不会提交事物 设置为true 执行更新提交事物

session.insert("com.shsxt.mapper.UserMapper.saveUserHasKey", user);

result=user.getId();// 获取主键

} catch (Exception e) {

e.printStackTrace();

}finally{

if(null!=session){

session.close();

}

}

return result;

}

 

在xml中编写正确的sql语句

         

         <insert id="saveUserHasKey" parameterType="user" useGeneratedKeys="true" keyProperty="id">

             insert into user(user_name,user_pwd) values(#{userName},#{userPwd})

         insert>

 

执行测试发生如下异常

            org.apache.ibatis.exceptions.PersistenceException:

### Error updating database.  Cause: java.sql.SQLException: Field 'id' doesn't have a default value

### The error may involve com.shsxt.mapper.UserMapper.saveUserHasKey02-Inline

### The error occurred while setting parameters

### SQL: insert into user(user_name,user_pwd) values(?,?)

### Cause: java.sql.SQLException: Field 'id' doesn't have a default value     

     

看到自己代码没有错误的情况下，百度了一下，好多结果，一种方法是打开my.ini，查找sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"修改为sql-mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"然后重启MYSQL；

还有一种方法就是MySQL 5 uses a strict mode which needs to be disabled.In Windows, Goto Start-->Programs-->MySQL->MySQL Instance Config Wizard. Follow through the Reconfigure Instance option-->Detailed Configuration-->Continue Next a few screens. At the bottom under Enable TCP/IP option there is 'Enable Strict Mode'. Deslect this option (no tick). Save changes and MySQL will restart.

 

我试了几个方法，发现这个问题只需要把自己mysql数据库里，在设计表时主键id设置为自动递增，就能很简单的解决这个问题