springboot 2.3 整合mybatis分页插件，以及注意事项案例
1.添加依赖
com.github.pagehelper
pagehelper-spring-boot-starter
1.2.5
2.控制层代码的方法
@RestController
@Validated
@Api(tags = "我的报名相关接口")
@RequestMapping("/entroll")
public class EntrollController {
@RequestMapping("/getMyEntrollZsbmStudentsList")
public ResultVO getMyEntrollZsbmStudentsList(HttpServletRequest request,@NotNull(message ="currentPage不能为空！") @RequestParam(value="currentPage") Integer currentPage,
@NotNull(message ="pageSize不能为空！") @RequestParam(value="pageSize") Integer pageSize,@RequestParam(value="name",required = false) String name){
Object object = request.getSession().getAttribute(Constants.SESSION_USER_Attribute);
if(object!=null){
ZsbmUser user=(ZsbmUser)object;
return enterService.getMyEntrollZsbmStudentsList(currentPage,pageSize,name,user);
}
return new ResponseResultUtil().success(ResponseCodeEnum.UNLOGIN_ERROR.getCode(),
ResponseCodeEnum.UNLOGIN_ERROR.getMessage(),null,true);
}
}
3.业务层方法代码
@Service
public class EnterService {
/** 我的报名模块接口注入 **/
@Autowired
private ZsbmStudentDao zsbmStudentDao;
/**
* @description 我的报名列表查询
* @param currentPage 当前页
* @param pageSize 当前页的大小
* @param name 姓名
* @return ResultVO
*/
public ResultVO getMyEntrollZsbmStudentsList(Integer currentPage, Integer pageSize,String name,ZsbmUser user) {
//给mybatis插件设置起始页 要注意此处的位置【放在查询数据代码的前后都是不一样的】
PageHelper.startPage(currentPage, pageSize);
String uid = user.getUid();
String roleEname =user.getRoleEname();
Boolean isAdmin=false;
//如果是管理员用户
if(Constants.ROLE_ADMIN.equals(roleEname)){
isAdmin=true;
}
List zsbmStudents = zsbmStudentDao.getZsbmStudentList(uid,name,isAdmin);
PageInfo pageInfo = new PageInfo(zsbmStudents);
Page page=new Page(currentPage,true,pageSize,pageInfo.getSize());
if(pageInfo!=null&&pageInfo.getList().size()>0){
for(int i=0;i<=pageInfo.getList().size()-1;i++){
String sid=pageInfo.getList().get(i).getSid();
List zsbmStudentParentList = zsbmStudentDao.getZsbmStudentParentsBySid(sid);
if(zsbmStudentParentList!=null&&zsbmStudentParentList.size()>0){
pageInfo.getList().get(i).setZsbmStudentParents(zsbmStudentParentList);
}
List zsbmAttachList = zsbmStudentDao.getBestSoreBySid(sid);
if(zsbmAttachList!=null&&zsbmAttachList.size()>0){
pageInfo.getList().get(i).setBestScores(zsbmAttachList);
}
}
return new ResponseResultUtil().success(new PageVO(pageInfo.getList(), page), true);
}
return new ResponseResultUtil().success(true);
}
}
4.接口代码
package com.iflytek.edu.hnezzhxy.dao;
import com.iflytek.edu.hnezzhxy.model.ZsbmAttach;
import com.iflytek.edu.hnezzhxy.model.ZsbmStudent;
import com.iflytek.edu.hnezzhxy.model.ZsbmStudentParent;
import com.iflytek.edu.hnezzhxy.vo.MyEntrollVo;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import java.util.List;
@Mapper
public interface ZsbmStudentDao {
/** 查询学生信息列表 **/
List getZsbmStudentList(@Param("uid") String uid,@Param("name") String name,@Param("isAdmin")Boolean isAdmin);zsbmStudentParent);
/** 通过sid查询自己亲人信息 **/
List getZsbmStudentParentsBySid(@Param("sid") String sid);
/** 获取成绩照片信息 **/
List getBestSoreBySid(@Param("sid") String sid);
}
5.xml文件
a.id,a.sid,a.name,a.sex,a.birth,a.nation_code,a.graduate_school,a.stu_phone_num,a.ID_card_num
,a.admission_no,a.create_time,a.modify_time,a.del_flag,a.status,a.examine_time,examine_uid,a.examine_reason
insert into zsbm_student (sid,name,sex,birth,nation_code,
graduate_school,stu_phone_num,ID_card_num,
admission_no,creator_id,create_time,modify_time,del_flag
)
values (#{sid,jdbcType=VARCHAR}, #{name,jdbcType=VARCHAR},#{sex,jdbcType=TINYINT},
#{birth,jdbcType=DATE},#{nationCode,jdbcType=VARCHAR},#{graduateSchool,jdbcType=VARCHAR},
#{stuPhoneNum,jdbcType=VARCHAR},#{idcardNum,jdbcType=VARCHAR},#{admissionNo,jdbcType=VARCHAR},#{creatorId,jdbcType=VARCHAR},
#{createTime,jdbcType=TIMESTAMP}, #{modifyTime,jdbcType=TIMESTAMP},#{delFlag,jdbcType=TINYINT}
)
insert into zsbm_student_parent (sid,type,name,dw,phone,modify_time) values
(#{item.sid,jdbcType=VARCHAR},#{item.type,jdbcType=TINYINT},#{item.name,jdbcType=VARCHAR},
#{item.dw,jdbcType=VARCHAR},#{item.phone,jdbcType=VARCHAR},#{item.modifyTime,jdbcType=TIMESTAMP})
insert into zsbm_attach (sid,file_name,suffix,file_size,context_id,file_url,type) values
(#{item.sid,jdbcType=VARCHAR},#{item.fileName,jdbcType=VARCHAR},#{item.suffix,jdbcType=VARCHAR},
#{item.fileSize,jdbcType=VARCHAR},#{item.contextId,jdbcType=VARCHAR},#{item.fileUrl,jdbcType=VARCHAR}
,#{item.type,jdbcType=TINYINT}
)
insert into zsbm_attach(sid,file_name,suffix,file_size,context_id,
file_url,type
)
values (#{sid,jdbcType=VARCHAR},#{fileName,jdbcType=VARCHAR},#{suffix,jdbcType=VARCHAR},
#{fileSize,jdbcType=VARCHAR},#{contextId,jdbcType=VARCHAR},#{fileUrl,jdbcType=VARCHAR},#{type,jdbcType=TINYINT}
)
update zsbm_student
name = #{name,jdbcType=VARCHAR},
sex = #{sex,jdbcType=TINYINT},
birth = #{birth,jdbcType=DATE},
nation_code = #{nationCode,jdbcType=VARCHAR},
graduate_school = #{graduateSchool,jdbcType=VARCHAR},
stu_phone_num = #{stuPhoneNum,jdbcType=VARCHAR},
ID_card_num = #{idcardNum,jdbcType=VARCHAR},
admission_no = #{admissionNo,jdbcType=VARCHAR},
modify_time = #{modifyTime,jdbcType=TIMESTAMP}
where sid = #{sid,jdbcType=VARCHAR}
update zsbm_student_parent
type = #{item.type,jdbcType=TINYINT},
name = #{item.name,jdbcType=VARCHAR},
dw = #{item.dw,jdbcType=VARCHAR},
phone = #{item.phone,jdbcType=VARCHAR},
modify_time = #{item.modifyTime,jdbcType=TIMESTAMP}
where id = #{item.id,jdbcType=INTEGER}
update zsbm_attach
file_name = #{item.fileName,jdbcType=VARCHAR},
suffix = #{item.suffix,jdbcType=VARCHAR},
file_size = #{item.fileSize,jdbcType=VARCHAR},
context_id = #{item.contextId,jdbcType=VARCHAR},
file_url = #{item.fileUrl,jdbcType=VARCHAR},
del_flag = #{item.delFlag,jdbcType=TINYINT},
type = #{item.type,jdbcType=TINYINT},
where id = #{item.id,jdbcType=INTEGER}
update zsbm_attach
file_name = #{fileName,jdbcType=VARCHAR},
suffix = #{suffix,jdbcType=VARCHAR},
file_size = #{fileSize,jdbcType=VARCHAR},
context_id = #{contextId,jdbcType=VARCHAR},
file_url = #{fileUrl,jdbcType=VARCHAR},
del_flag = #{delFlag,jdbcType=TINYINT},
where id = #{id,jdbcType=INTEGER}
update zsbm_attach set del_flag=1 where sid=#{sid} and type=0 and del_flag=0
5.使用此mybatis分页插件需要注意的地方
不要在xml中使用关联查询1对多的collection标签，这样会导致列表查询出来的数据真实性有问题，因为主表数据重复了，导致分页有问题，比如：