数据库有自增主键，mybatis新增后获取自增主键

方法一

 在insert标签里加两个属性，分别是useGeneratedKeys="true"和keyProperty="seq"

其中seq是我数据库表里的自增主键

方法二

在insert标签内部加上

      
          select last_insert_id()
      

完整如下 

 
    insert into sys_menu
    
      
        seq,
      
      
        id,
      
      
        pid,
      
      
        text,
      
      
        icon_cls,
      
      
        url,
      
      
        state,
      
      
        create_date,
      
      
        update_date,
      
    
    
      
        #{seq,jdbcType=INTEGER},
      
      
        #{id,jdbcType=VARCHAR},
      
      
        #{pid,jdbcType=VARCHAR},
      
      
        #{text,jdbcType=VARCHAR},
      
      
        #{iconCls,jdbcType=VARCHAR},
      
      
        #{url,jdbcType=VARCHAR},
      
      
        #{state,jdbcType=INTEGER},
      
      
        #{createDate,jdbcType=TIMESTAMP},
      
      
        #{updateDate,jdbcType=TIMESTAMP},
      
    
      
          select last_insert_id()
      

  

调用实例

 @RequestMapping("add")
    public String addMenu(String jsonData){
        Result result=new Result();
        SysMenuEntity sysMenuEntity=JSONObject.parseObject(jsonData,SysMenuEntity.class);
        sysMenuEntity.setCreateDate(new Date());
        sysMenuEntity.setUpdateDate(new Date());
        int count = sysMenuService.insertSelective(sysMenuEntity);
        if (count == 1){
            result.setResultCode(Constant.ResultCode.OK);
            result.setMessage("保存成功");
        }
        System.out.println(sysMenuEntity.getSeq());
        super.writeJson(result);
        return null;
    }

输出结果

2018-10-31 15:35:02.802 DEBUG 5252 --- [nio-8098-exec-7] c.n.b.m.r.SysMenuMapper.insertSelective  : ==>  Preparing: insert into sys_menu ( id, pid, text, icon_cls, url, state, create_date, update_date ) values ( ?, ?, ?, ?, ?, ?, ?, ? ) 
2018-10-31 15:35:02.804 DEBUG 5252 --- [nio-8098-exec-7] c.n.b.m.r.SysMenuMapper.insertSelective  : ==> Parameters: 不不不(String), (String), 呃呃呃(String), 啊啊啊(String), (String), 1(Integer), 2018-10-31 15:35:02.799(Timestamp), 2018-10-31 15:35:02.799(Timestamp)
2018-10-31 15:35:02.895 DEBUG 5252 --- [nio-8098-exec-7] c.n.b.m.r.SysMenuMapper.insertSelective  : <==    Updates: 1
2018-10-31 15:35:02.896 DEBUG 5252 --- [nio-8098-exec-7] c.n.b.m.r.S.insertSelective!selectKey    : ==>  Preparing: select last_insert_id() 
2018-10-31 15:35:02.896 DEBUG 5252 --- [nio-8098-exec-7] c.n.b.m.r.S.insertSelective!selectKey    : ==> Parameters: 
2018-10-31 15:35:02.943 DEBUG 5252 --- [nio-8098-exec-7] c.n.b.m.r.S.insertSelective!selectKey    : <==      Total: 1
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