1.引入依赖
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.10</version>
</dependency>
2.在application.yml中做如下配置
#pagehelper分页插件配置
pagehelper.helperDialect=mysql
pagehelper.reasonable=false
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql
3.在代码中使用
controller
@PostMapping("/photo/list")
@ResponseBody
public Object getMissionphotoList(PageRequest<MissionPhoto> page, MissionPhoto missionPhoto){
page.setParam(missionPhoto);
PageResult<MissionPhoto> pageResult = missionPhotoService.findPages(page);
PageResponse response = new PageResponse(pageResult.getCount(), pageResult.getData());
return response;
}
service
public PageResult<MissionPhoto> findPages(PageRequest<MissionPhoto> page) {
HashMap<String, Object> param = new HashMap<>();
if (page != null && page.getParam() != null){
param.put("deviceids",page.getParam().getDeviceIds());
param.put("missionids",page.getParam().getMissionIds());
}
Page page1 = PageHelper.startPage(page.getStart(),page.getLimit());
List<MissionPhoto> reslut = missionPhotoMapper.selectByCondition(param);
return new PageResult<MissionPhoto>(page1.getTotal(),reslut);
}
mapper
<select id="selectByCondition" parameterType="java.util.Map" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from tsk_mission_photo t
<where>
<if test="deviceids != null and deviceids.size() > 0">
and t.device_id in
<foreach item="item" collection="deviceids" separator="," open="(" close=")">
#{
item}
</foreach>
</if>
<if test="missionids != null and missionids.size() > 0">
and t.mission_id in
<foreach item="item" collection="missionids" separator="," open="(" close=")">
#{
item}
</foreach>
</if>
</where>
</select>
返回结构封装
public class PageRequest<T> {
//页码，1-based
private Integer page = 1;
//每页记录数
private Integer limit = Integer.MAX_VALUE;
private T param;
public PageRequest() {
}
public PageRequest(Integer page, Integer limit, T param) {
super();
this.page = page;
this.limit = limit;
this.param = param;
}
public Integer getPage() {
return page;
}
public void setPage(Integer page) {
this.page = page;
}
public Integer getLimit() {
return limit;
}
public void setLimit(Integer limit) {
this.limit = limit;
}
public Integer getStart() {
Integer start = (page -1) * limit;
return start;
}
public T getParam() {
return param;
}
public void setParam(T param) {
this.param = param;
}
}
/**
* @author lzg
* @param <T> 分页数据里面的数据对象类型
*/
public class PageResult<T> {
//总记录数
private Long count;
//数据
private List<T> data;
public PageResult(Long count, List<T> data) {
this.count = count;
this.data = data;
}
public Long getCount() {
return count;
}
public void setCount(Long count) {
this.count = count;
}
public List<T> getData() {
return data;
}
public void setData(List<T> data) {
this.data = data;
}
}
/**
* @author lzg
* 暴露给前端的分页查询响应数据
*/
public class PageResponse extends AjaxResponse {
//总记录数
private Long count;
public PageResponse() {
super();
}
public PageResponse(Integer code, Long count, Object data, String msg) {
super(code, msg, data);
this.count = count;
}
public PageResponse(Long count, Object data, String msg) {
this(ResponseCode.SUCCESS.getCode(), count, data, msg);
}
public PageResponse(Long count, Object pageData) {
this(count, pageData, "success");
}
public Long getCount() {
return count;
}
public void setCount(Long count) {
this.count = count;
}
}