Mybatis 动态查询、插入、修改操作

简单的记一下吧 

insert操作   特别注意里面的判断语句，一般都是用包装类最好，另外 String类型最好加上一个判断  ！= ''

  
    
        insert into item_info
        
            
                pid,
            
            
                batch_name,
            
            
                faculty,
            
            
                item_type,
            
            
                item_rank,
            
            
                item_apply_status,
            
            
                item_middle_status,
            
            
                item_conclusion_status,
            
            
                item_sumMoney,
            
            
                item_balanceMoney,
            
            
                apply_time,
            
            
                item_introduce,
            
        

        
            
                #{pid},
            
            
                #{batch_name},
            
            
                #{faculty},
            
            
                #{item_type},
            
            
                #{item_rank},
            
            
                #{item_apply_status},
            
            
                #{item_middle_status},
            
            
                #{item_conclusion_status},
            
            
                #{item_sumMoney},
            
            
                #{item_balanceMoney},
            
            
                #{apply_time},
            
            
                #{item_introduce},
          
        
    

 

 

select 操作   还是自己要去注意where标签的用法

 
        select * from item_info
        
        
            faculty = #{faculty} and
        
        
            item_type = #{item_type} and
        
        
            item_rank = #{item_rank} and
        
        
            pid = #{pid} and
        
        
            item_id = #{item_id} and
        
            1=1
        
    

 

update  这里有一个set标签的用法

  
        update student
        
            
                studName = #{studName,jdbcType=VARCHAR},
            
            
                stud_faculty = #{stud_faculty,jdbcType=VARCHAR},
            
            
                className = #{className,jdbcType=VARCHAR},
            
            
                qq = #{qq,jdbcType=VARCHAR},
            
            
                sex = #{sex,jdbcType=VARCHAR},
            
            
                phoneNumber = #{phoneNumber,jdbcType=VARCHAR},
            
            
                studNum = #{studNum,jdbcType=VARCHAR},
            
        
        where item_id = #{item_id,jdbcType=INTEGER} and sign = #{sign}