MybatisPlus自定义多表Sql分页查询
- 自定义sql分页的步骤
- 使用的MybatisPlus的版本
- 分页工具可以自己定义
- 入参实体
- 出参实体
-
自定义sql分页的步骤
- 第一个参数必须为分页的参数IPage，后面参数为QueryWrapper
使用的MybatisPlus的版本
<properties><mybatis.plus.version>3.1.0mybatis.plus.version>properties>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-coreartifactId>
<version>${mybatis.plus.version}version>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-boot-starterartifactId>
<version>${mybatis.plus.version}version>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-annotationartifactId>
<version>${mybatis.plus.version}version>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-extensionartifactId>
<version>${mybatis.plus.version}version>
dependency>
分页工具可以自己定义
@Slf4j
@Data
@ToString
@ApiModel(description = "分页请求对象")
public class PageReq<T> implements Serializable {
private static final long serialVersionUID = 1L;
@ApiModelProperty(value = "页码", required = true, example = "1")
private int pageNo;
@ApiModelProperty(value = "页大小", required = true, example = "20")
private int pageSize;
@ApiModelProperty(value = "参数实体")
private T t;
public int getMyStart() {
return (pageNo - 1) * pageSize;
}
public static <T> PageReq<T> getPageReq(String json, Class<T> objClass) {
ObjectMapper mapper = JSONUtils.getMapperInstance();
JsonNode root = null;
PageReq<T> page = null;
try {
root = mapper.readTree(json);
page = new PageReq<T>();
page.setPageNo(root.get("pageNo").asInt());
page.setPageSize(root.get("pageSize").asInt());
JsonNode tNode = root.get("t");
if (tNode != null) {
T t = JSONUtils.jsonToObject(root.get("t"), objClass);
page.setT(t);
}
} catch (Exception e) {
e.printStackTrace();
log.error("json string to JsonNode error,please check json string!json:" + json, e);
throw new RuntimeException("json string to JsonNode error,please check json string!");
}
return page;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
} else if (!(o instanceof PageReq)) {
return false;
} else {
PageReq other = (PageReq) o;
if (!other.canEqual(this)) {
return false;
} else {
Object this$pageNo = this.getPageNo();
Object other$pageNo = other.getPageNo();
if (this$pageNo == null) {
if (other$pageNo != null) {
return false;
}
} else if (!this$pageNo.equals(other$pageNo)) {
return false;
}
Object this$pageSize = this.getPageSize();
Object other$pageSize = other.getPageSize();
if (this$pageSize == null) {
if (other$pageSize != null) {
return false;
}
} else if (!this$pageSize.equals(other$pageSize)) {
return false;
}
return true;
}
}
}
protected boolean canEqual(Object other) {
return other instanceof PageReq;
}
@Override
public int hashCode() {
int result = 1;
Object $pageNo = this.getPageNo();
result = result * 59 + ($pageNo == null ? 43 : $pageNo.hashCode());
Object $pageSize = this.getPageSize();
result = result * 59 + ($pageSize == null ? 43 : $pageSize.hashCode());
return result;
}
@Override
public String toString() {
return "PageReq(pageNo=" + this.getPageNo() + ", pageSize=" + this.getPageSize() + ")";
}
}
入参实体
@Data
public class TeamPageReq {
@ApiModelProperty("用户名")
private String userName;
@ApiModelProperty("电话号码")
private String phone;
}
出参实体
@Data
public class TeamRes {
private BigDecimal achievement;
private String id;
private String userName;
private String phone;
private String phone;
private String vipNum;
private String achievement;
private String parent;
}
@RequestMapping("/teamApi")
public class TeamController {
@Autowired
private ITeamService teamService;
@ApiOperation(value = "团队列表查询", notes = "团队列表查询")
@PostMapping("/findTeamPage")
public ResponseVo<Page<TeamRes>> findOrderPage(@RequestBody PageReq<TeamPageReq> teamReqPage) {
return new ResponseVo(ResponseEnum.OK, teamService.findTeamPage(teamReqPage));
}
}
public interface ITeamService extends IService<TeamEntity>{
IPage<TeamRes> findTeamPage(PageReq<TeamPageReq> teamReqPage);
}
这是接口实现的代码
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zcr.backstage.entity.TeamEntity;
import com.zcr.backstage.mapper.TeamMapper;
import com.zcr.backstage.req.TeamPageReq;
import com.zcr.backstage.res.TeamRes;
import com.zcr.backstage.service.ITeamService;
import com.zcr.common.business.BusinessException;
import com.zcr.common.business.ResponseEnum;
import com.zcr.common.manager.ISessionManager;
import com.zcr.common.utils.StringUtils;
import com.zcr.common.vo.PageReq;
import com.zcr.common.vo.UserJwtRes;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Slf4j
@Service
public class TeamServiceImpl extends ServiceImpl<TeamMapper, TeamEntity> implements ITeamService {
@Override
public IPage<TeamRes> findTeamPage(PageReq<TeamPageReq> teamReqPage) {
String userName = teamReqPage.getT().getUserName();
String phone = teamReqPage.getT().getPhone();
QueryWrapper teamResQueryWrapper = new QueryWrapper<>();
if (StringUtils.isNotBlank(userName)) {
teamResQueryWrapper.like("u.user_name", userName);
}
if (StringUtils.isNotBlank(teamReqPage.getT().getPhone())) {
teamResQueryWrapper.like("u.phone", phone);
}
Page<TeamRes> page = new Page<>();
page.setCurrent(teamReqPage.getPageNo());
page.setSize(teamReqPage.getPageSize());
IPage<TeamRes> resPage = baseMapper.pageTeamInfo(page, teamResQueryWrapper);
return resPage;
}
}
这里是Mapper的代码
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Constants;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
public interface TeamMapper extends BaseMapper<TeamEntity> {
String sql = "SELECT\n" +
"\tu.id,\n" +
"\tu.user_name,\n" +
"\tu.phone,\n" +
"\tt.vip_num,\n" +
"\tt.achievement,\n" +
"\tt.parent\n" +
"FROM\n" +
"\tz_team t\n" +
"\tINNER JOIN z_user u ON u.id = t.user_id \n" +
"\tAND u.del_flag =0 ${ew.customSqlSegment}";
@Select(sql)
IPage<TeamRes> pageTeamInfo(Page<TeamRes> page, @Param(Constants.WRAPPER) QueryWrapper queryWrapper);
}
