mybatis判断int是否为空的时候,需要注意的3点

public class ExcelPutVo {
 private Integer startTime;// 开始时间
 private Integer endTime;// 截止时间
 private int sentId;// 下达者id
 private String onlyUuid;// 唯一标识
 public int getSentId() {
 return sentId;
 }

 public void setSentId(int sentId) {
 this.sentId = sentId;
 }

 public String getOnlyUuid() {
 return onlyUuid;
 }

 public void setOnlyUuid(String onlyUuid) {
 this.onlyUuid = onlyUuid;
 }
 public Integer getStartTime() {
 return startTime;
 }

 public void setStartTime(Integer startTime) {
 this.startTime = startTime;
 }

 public Integer getEndTime() {
 return endTime;
 }

 public void setEndTime(Integer endTime) {
 this.endTime = endTime;
 }

<!-- 导出excel的数据查询 -->
 <select id="selectByExcelPutVo" resultMap="BaseResultMap"
 parameterType="com.zeng.zhdj.wy.entity.vo.ExcelPutVo">
 select *
 from count_use
 <where>
 1=1
 <if test="sentId != null">
 and sent_id=#{sentId,jdbcType=INTEGER}
 </if>
 <if test="endTime != null">
 and count_end_month &lt;=#{endTime,jdbcType=INTEGER}
 </if>
 <if test="startTime!= null">
 and count_start_month &gt;=#{startTime,jdbcType=INTEGER}
 </if>
 <if test="onlyUuid != null">
 and only_type=#{onlyUuid,jdbcType=VARCHAR}
 </if>
 </where>
 </select>