java 索取了多表联合查询分页,mybatis-plus多表联合分页查询

1.entity层要写个Vo实体类

2.controller

@AutoLog(value = "员工CURD-分页列表查询")

@ApiOperation(value="员工CURD-分页列表查询", notes="员工CURD-分页列表查询")

@GetMapping(value = "/list")

public Result> queryPageList(EmployeeVo employee,

@RequestParam(name="pageNo", defaultValue="1") Integer pageNo,

@RequestParam(name="pageSize", defaultValue="10") Integer pageSize,

HttpServletRequest req) {

//QueryGenerator.initQueryWrapper是jeecg-boot封装的查询,默认支持所有复杂的检索查询

QueryWrapper queryWrapper = QueryGenerator.initQueryWrapper(employee, req.getParameterMap());

Page page = new Page(pageNo, pageSize);

//自定义getAll接口

IPage pageList=employeeService.getAll1(page,queryWrapper);

return Result.ok(pageList);

}

3.servlce

4.mapper.java

public interface EmployeeMapper extends BaseMapper {

/**

* mybatis-plus多表查询

* @param page

* @param wrapper

* @return

*/

[email protected](Constants.WRAPPER),xml里加上${ew.customSqlSegment}可以实现复杂条件检索查询

IPage findByPage(IPage page, @Param(Constants.WRAPPER) Wrapper wrapper);

}

5.mapper.xml

select employee.*,department.dep_name from employee left join department

on employee.sys_org_code = department.id ${ew.customSqlSegment}

6.查询出来的结果

{

"success": true,

"message": "操作成功！",

"code": 200,

"result": {

"records": [

{

"createTime": "2020-10-14 16:35:36",

"sex": "女",

"name": "helloTest",

"updateTime": "2020-10-14 16:41:41",

"id": "1316296704307597313",

"depName": "研发部",//这个是部门表中的字段,同过两表联查查询出来的

"age": 23,

"hobby": "打牌"

},

{

"createTime": "2020-08-01 16:50:04",

"sex": "男",

"name": "萨芬",

"updateTime": "2020-09-17 16:50:07",

"id": "2",

"depName": "人事部",

"age": 12,

"hobby": "阿斯顿"

}

],

"total": 2,

"size": 10,

"current": 1,

"orders": [],

"optimizeCountSql": true,

"hitCount": false,

"searchCount": true,

"pages": 1

},

"timestamp": 1602729521729

}

原文：https://www.cnblogs.com/exmyth/p/14342613.html

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