jeecgboot多表聯合查詢

在數據大屏中需要多表聯合查詢的業務處理，而Jeecgboot提供的生成工具只能滿足最普遍的簡單代碼，mybatis-plus框架使用的QueryWrapper顯然無法滿足多表聯合查詢，需要重寫API接口。

1.新建返回對象的實體類

import lombok.Data;
@Data
public class Vendorcount {
    private Integer vendor;
    private Integer material;
}

2.mapper層接口

public interface VendorcountMapper extends BaseMapper<vendorcount> {
    List<vendorcount> pageByVendor();
}

3.xml中寫入sql

<select id="pageByVendor" resulttype="org.jeecg.modules.demo.vendorquery.entity.Vendorcount">
        select count(DISTINCT material13.Vendor) as vendor,count(DISTINCT material13.Material) as material
        from material13 INNER JOIN stock on material13.Vendor=stock.create_by and material13.Plant=stock.plant
        and material13.Material=stock.partno
</select>

4.service接口

public&nbsp;interface&nbsp;IVendorcountService&nbsp;extends&nbsp;IService<vendorcount>&nbsp;{
    List<vendorcount> pageByVendorService();
}

5.serviceImpl

@Service
public class VendorcountServiceImpl extends ServiceImpl<vendorcountmapper, vendorcount=""> implements IVendorcountService {
    @Autowired
    private VendorcountMapper vendorcountMapper;

    @Override
    public List<vendorcount> pageByVendorService() {
        return vendorcountMapper.pageByVendor();
    }
}

6.control層

@Api(tags = "供應商查詢")
@RestController
@RequestMapping("/Vendorcount/vendorcount")
@Slf4j
public class VendorcountController extends JeecgController<vendorcount, ivendorcountservice=""> {
    @Autowired
&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;IVendorcountService&nbsp;vendorcountService;
    @AutoLog(value = "供應商查詢-統計個數")
    @ApiOperation(value = "供應商查詢-統計個數", notes = "供應商查詢-統計個數")
    @GetMapping(value = "/list")
    public Result<!--?--> queryVendor(HttpServletRequest req) {
        List<vendorcount> pageList = vendorcountService.pageByVendorService();
        return Result.ok(pageList);
    }
}

7.Shiro配置

// 配置不會被攔截的鏈接
filterChainDefinitionMap.put("/Vendorcount/vendorcount/**", "anon"); //

8.調試API接口

9.前端定時調用接口刷新數據

getAction("/Vendorcount/vendorcount/list").then((res) => {
    if (res.success) {
      let a = res.result
      this.titleItem[0].number.number = [a[0]["material"]]
      this.titleItem[1].number.number = [a[0]["vendor"]]
      this.titleItem = {
        ...this.titleItem
      }
      this.show = false
      this.$nextTick(() => {
        this.show = true
      })

大屏展示

</vendorcount,></vendorcountmapper,>