3回答

• 

  qq_可乐_68

  2019-02-25 17:14:06

  已采纳

  大概意思是说你有一个参数为空，建议您先把代码贴出来

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• 

  qq_可乐_68

  2019-02-26 08:58:30

  我看你代码没有错呀，数据库设计怎么样呢？ResultMap配置（数据库跟实体类的映射配置）还有你试过DeBug找没？

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• 

  宝慕林0045603

  2019-02-25 21:16:11

  public void updateArea(){   
       Area area = new Area();     
         area.setAreaName("西苑");    
             area.setAreaId(3);     
                area.setLastEditTime(new Date());   
                     int effectedNum = areaDao.updateArea(area);  
                           assertEquals(1,effectedNum);  
                            }

  <update id="updateArea" parameterType="com.imooc.demo1.entity.Area">

          UPDATE tb_area

          <set>

              <if test="areaName != NULL">area_name=#{areaName},</if>

              <if test="priority != NULL">priority=#{priority},</if>

              <if test="lastEditTime != NULL">last_edit_time=#{lastEditTime}</if>

          </set>

          WHERE area_id=#{areaId}

      </update>

  public class Area {

      // 主键ID

      private Integer areaId;

      // 名称

      private String areaName;

      // 权重

      private Integer priority;

      // 创建时间

      private Date createTime;

      //更新时间

      private Date lastEditTime;

  
  

      public Integer getAreaId() {

          return areaId;

      }

  
  

      public void setAreaId(Integer areaId) {

          this.areaId = areaId;

      }

  
  

      public String getAreaName() {

          return areaName;

      }

  
  

      public void setAreaName(String areaName) {

          this.areaName = areaName;

      }

  
  

      public Integer getPriority() {

          return priority;

      }

  
  

      public void setPriority(Integer priority) {

          this.priority = priority;

      }

  
  

      public Date getCreateTime() {

          return createTime;

      }

  
  

      public void setCreateTime(Date createTime) {

          this.createTime = createTime;

      }

  
  

      public Date getLastEditTime() {

          return lastEditTime;

      }

  
  

      public void setLastEditTime(Date lastEditTime) {

          this.lastEditTime = lastEditTime;

      }

  
  

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