Java如何使用Query动态拼接SQL详解

前言

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之前有做个一个自定义报表的查询，这里使用的是一个动态的sql拼接，是前端选择了什么指标就查询什么信息！（这里的指标是多个表的字段，前端随便选择了这些指标，然后后端根据这些指标拼接sql，返回这些指标的数据）。

参数接受DTO

public class DefinedReportFormDTO {
 /**
 * 指标id
 */
 private List ids;
 /**
 * 开始时间
 */
 @DateTimeFormat(pattern = "yyyy-MM")
 private Date startTime;
 /**
 * 结束时间
 */
 @DateTimeFormat(pattern = "yyyy-MM")
 private Date endTime;
 /**
 * 频率
 */
 private String timeStyle;
 

 private boolean avg =false;

 private String idsParam;

 private String companyIdsParam;

 public void setCompanyIdsParam(String companyIdsParam) {
 this.companyIdsParam = companyIdsParam;
 }

 public void setIdsParam(String idsParam) {
 this.idsParam = idsParam;
 }

 public String getCompanyIdsParam() {
 return companyIdsParam;
 }

 public String getIdsParam() {
 return idsParam;
 }
 public boolean isAvg() {
 return avg;
 }

 public void setAvg(boolean avg) {
 this.avg = avg;
 }


 public Date getStartTime() {
 return startTime;
 }

 public void setStartTime(Date startTime) {
 this.startTime = startTime;
 }

 public Date getEndTime() {
 return endTime;
 }

 public void setEndTime(Date endTime) {
 this.endTime = endTime;
 }

 public String getTimeStyle() {
 return timeStyle;
 }

 public void setTimeStyle(String timeStyle) {
 this.timeStyle = timeStyle;
 }

 public List getIds() {
 return ids;
 }

 public void setIds(List ids) {
 this.ids = ids;
 }
}

数据返回VO

public class DefinedReportFormVO implements Serializable {
 private String time;
 private List> arr = new ArrayList<>();

 public String getTime() {
 return time;
 }

 public void setTime(String time) {
 this.time = time;
 }

 public List> getArr() {
 return arr;
 }

 public void setArr(List> arr) {
 this.arr = arr;
 }
}

控制器Controller

@GetMapping("/report/defindReport")
 public JsonResponseExt defindReport(DefinedReportFormDTO definedReportFormDTO){

 

 
 //测试数据 
 

 List list1 = new ArrayList<>();
 list1.add("111");
 definedReportFormDTO.setIds(list1);
 definedReportFormDTO.setTimeStyle("month");
 definedReportFormDTO.setAvg(true); 

 Calendar instance = Calendar.getInstance();
 instance.set(2018,1,11);
 definedReportFormDTO.setStartTime(instance.getTime());
 instance.setTime(new Date());
 definedReportFormDTO.setEndTime(instance.getTime());

 return JsonResponseExt.success(dataAcquisitionFileInfoService.defindQuery(definedReportFormDTO));

 }

服务类Service

public interface DataAcquisitionFileInfoService {
 
 List defindQuery(DefinedReportFormDTO parameter);
 
 }

实现类ServiceImpl

@SuppressWarnings("unchecked")
 @Override
 public List defindQuery(DefinedReportFormDTO parameter) {


 /**


  * 定义五张表的查询字符串，年月，和机构id默认查询
  */
 StringBuilder orgInformationCbrc = new StringBuilder("select reporting_year as reportingYear,reporting_month as reportingMonth, company_id ,");
 StringBuilder orgBasicInformation = new StringBuilder("select reporting_year as reportingYear,reporting_month as reportingMonth, company_id,");
 StringBuilder orgBusinessStructure = new StringBuilder("select reporting_year as reportingYear,reporting_month as reportingMonth, company_id,");
 StringBuilder orgProfit = new StringBuilder("select reporting_year as reportingYear,reporting_month as reportingMonth, company_id,");
 StringBuilder orgBalanceSheets = new StringBuilder("select reporting_year as reportingYear,reporting_month as reportingMonth, company_id,");

 //定义机构的字符串
 StringBuilder companyIds = new StringBuilder("");
 //查询所有机构
 List orgList = orgService.getOrgList();

 //拼接所有机构的字符串（如果需要求平均数的话）
 for (Company company : orgList) {
  companyIds.append(company.getId()+",");
 }

 companyIds.deleteCharAt(companyIds.length()-1);
 //定义每个表的字符串判断
 Map bool = new HashMap<>();

 //指标名
 List fieldNames = new ArrayList();
 //返回结果
 List> result = new ArrayList<>();

 //指标名默认添加年月机构id
 fieldNames.add("reportingYear");
 fieldNames.add("reportingMonth");
 fieldNames.add("companyId");
 //定义指标id集合
 List ids = parameter.getIds();
 //循环所有的指标
 for (Object id : ids) {
  //如果指标为空
  if (!"".equals(id) && id != null) {
  //根据指标id查询指标
  OrgStatisticalIndicators orgStatisticalIndicators = orgStatisticalIndicatorsRespository.findByIdAndAndDelFlag(Long.parseLong(id.toString()));
  if(("year".equals(parameter.getTimeStyle()) && "0".equals(orgStatisticalIndicators.getYearQuery())) || ("month".equals(parameter.getTimeStyle()) && "0".equals(orgStatisticalIndicators.getMonthQuery()))){
   /**
   * 判断指标所在的表，然后为各自的表拼接上表的字段
   */
   if ("org_information_cbrc".equals(orgStatisticalIndicators.getTableName())) {
   orgInformationCbrc.append("ifnull("+orgStatisticalIndicators.getTableField()+",0) AS "+orgStatisticalIndicators.getField()+" ,");
   //
   if (bool.get("org_information_cbrc") == null) {
    bool.put("org_information_cbrc", orgStatisticalIndicators.getTableField());
   }
   //如果其他表不存在这个属性则为其他表拼接null
   orgBasicInformation.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBalanceSheets.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBusinessStructure.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgProfit.append("null as " + orgStatisticalIndicators.getField() + ",");

   //行业平均
   if (parameter.isAvg()) {
    if("year".equals(parameter.getTimeStyle())){
    orgInformationCbrc.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear AND reporting_month = '12' ) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }else{
    orgInformationCbrc.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }


    orgBalanceSheets.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");

    orgBasicInformation.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");

    orgBusinessStructure.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");

    orgProfit.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");




   }


   } else if ("org_basic_information".equals(orgStatisticalIndicators.getTableName())) {
   if (bool.get("org_basic_information") == null) {
    bool.put("org_basic_information", orgStatisticalIndicators.getTableField());
   }

   orgBasicInformation.append("ifnull("+orgStatisticalIndicators.getTableField()+",0) AS "+orgStatisticalIndicators.getField()+" ,");
   orgInformationCbrc.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBalanceSheets.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBusinessStructure.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgProfit.append("null as " + orgStatisticalIndicators.getField() + ",");

   //行业平均
   if (parameter.isAvg()) {
    if("year".equals(parameter.getTimeStyle())){
    orgBasicInformation.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear AND reporting_month = '12' ) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }else{
    orgBasicInformation.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }

    orgProfit.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgInformationCbrc.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBalanceSheets.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBusinessStructure.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");

   }

   } else if ("org_business_structure".equals(orgStatisticalIndicators.getTableName())) {
   orgBusinessStructure.append("ifnull("+orgStatisticalIndicators.getTableField()+",0) AS "+orgStatisticalIndicators.getField()+" ,");
   if (bool.get("org_business_structure") == null) {
    bool.put("org_business_structure", orgStatisticalIndicators.getTableField());
   }


   orgBasicInformation.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgInformationCbrc.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBalanceSheets.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgProfit.append("null as " + orgStatisticalIndicators.getField() + ",");

   //行业平均
   if (parameter.isAvg()) {
    if("year".equals(parameter.getTimeStyle())){
    orgBusinessStructure.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear AND reporting_month = '12' ) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }else{
    orgBusinessStructure.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }

    orgProfit.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgInformationCbrc.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBalanceSheets.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBasicInformation.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");





   }
   } else if ("org_profit".equals(orgStatisticalIndicators.getTableName())) {
   orgProfit.append("ifnull("+orgStatisticalIndicators.getTableField()+",0) AS "+orgStatisticalIndicators.getField()+" ,");
   if (bool.get("org_profit") == null) {
    bool.put("org_profit", orgStatisticalIndicators.getTableField());
   }

   orgBasicInformation.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgInformationCbrc.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBalanceSheets.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBusinessStructure.append("null as " + orgStatisticalIndicators.getField() + ",");

   //行业平均
   if (parameter.isAvg()) {
    if("year".equals(parameter.getTimeStyle())){
    orgProfit.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear AND reporting_month = '12' ) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }else{
    orgProfit.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }

    orgBasicInformation.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgInformationCbrc.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBalanceSheets.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBusinessStructure.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");



   }

   } else if ("org_balance_sheets".equals(orgStatisticalIndicators.getTableName())) {
   orgBalanceSheets.append("ifnull("+orgStatisticalIndicators.getTableField()+",0) AS "+orgStatisticalIndicators.getField()+" ,");
   if (bool.get("org_balance_sheets") == null) {
    bool.put("org_balance_sheets", orgStatisticalIndicators.getTableField());
   }


   orgBasicInformation.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgInformationCbrc.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgBusinessStructure.append("null as " + orgStatisticalIndicators.getField() + ",");
   orgProfit.append("null as " + orgStatisticalIndicators.getField() + ",");

   //行业平均
   if (parameter.isAvg()) {
    if("year".equals(parameter.getTimeStyle())){
    orgBalanceSheets.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear AND reporting_month = '12' ) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }else{
    orgBalanceSheets.append("(SELECT avg("+orgStatisticalIndicators.getTableField()+") FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    }


    orgProfit.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgInformationCbrc.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBalanceSheets.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");
    orgBusinessStructure.append("(SELECT avg(null) FROM "+orgStatisticalIndicators.getTableName()+" where reporting_year = reportingYear and reporting_month = reportingMonth) AS "+orgStatisticalIndicators.getField()+"Avg,");

   }
   }
   if (parameter.isAvg()==true) {
   fieldNames.add(orgStatisticalIndicators.getField());
   fieldNames.add(orgStatisticalIndicators.getField()+"Avg");
   } else {
   fieldNames.add(orgStatisticalIndicators.getField());
   }

  }

  }
 }


 //拼接where条件
 StringBuilder whereSql = new StringBuilder(" WHERE 1 = 1");


 if("year".equals(parameter.getTimeStyle())){
  whereSql.append(" AND reporting_year >= :startYear and reporting_year <= :endYear AND reporting_month = '12' ");
 }else{
  whereSql.append(" and CONCAT(reporting_year , '-' ,Right(100+CAST(reporting_month as SIGNED),2) )>= :startYear and CONCAT(reporting_year , '-' ,Right(100+CAST(reporting_month as SIGNED),2) ) <= :endYear");
 }

 //获取所有机构id
 List parameterCompanyIds = parameter.getCompanyIds();
 //如果机构id不为空
 if (parameterCompanyIds.size()>0) {
  whereSql.append(" AND company_id in ( ");


  for (int i = 0; i < parameterCompanyIds.size(); i++) {
  whereSql.append(":s"+i+" ,");
  }

  whereSql.deleteCharAt(whereSql.length()-1);
  whereSql.append(" )");
 }

 //定义Query
 Query orgBalanceSheetsQuery = null;



 //拼接五张表和条件
 orgBalanceSheets.deleteCharAt(orgBalanceSheets.length()-1);
 orgBalanceSheets.append(" from org_balance_sheets ");
 orgBalanceSheets.append(whereSql);

 orgBasicInformation.deleteCharAt(orgBasicInformation.length()-1);
 orgBasicInformation.append(" from org_basic_information ");
 orgBasicInformation.append(whereSql);

 orgBusinessStructure.deleteCharAt(orgBusinessStructure.length()-1);
 orgBusinessStructure.append(" from org_business_structure ");
 orgBusinessStructure.append(whereSql);

 orgInformationCbrc.deleteCharAt(orgInformationCbrc.length()-1);
 orgInformationCbrc.append(" from org_information_cbrc ");
 orgInformationCbrc.append(whereSql);


 orgProfit.deleteCharAt(orgProfit.length()-1);
 orgProfit.append(" from org_profit ");
 orgProfit.append(whereSql);


 //关联五张表
 orgBalanceSheets.append(" UNION ");
 orgBalanceSheets.append(orgBasicInformation.toString());

 orgBalanceSheets.append(" UNION ");
 orgBalanceSheets.append(orgBusinessStructure.toString());

 orgBalanceSheets.append(" UNION ");
 orgBalanceSheets.append(orgInformationCbrc.toString());

 orgBalanceSheets.append(" UNION ");
 orgBalanceSheets.append(orgProfit.toString());


 System.out.println(">>"+orgBalanceSheets.toString());


 //创建本地sql查询实例
 orgBalanceSheetsQuery = entityManager.createNativeQuery(orgBalanceSheets.toString());

 //如果时间为空那就获取现在的时间
 if(parameter.getEndTime() == null){
  parameter.setEndTime(new Date());
 }
 if(parameter.getStartTime() == null){
  parameter.setStartTime(new Date());
 }


 if("year".equals(parameter.getTimeStyle())){

  orgBalanceSheetsQuery.setParameter("startYear", com.honebay.spv.core.utils.DateUtil.formatDate(parameter.getStartTime(),"yyyy"));

  orgBalanceSheetsQuery.setParameter("endYear", com.honebay.spv.core.utils.DateUtil.formatDate(parameter.getEndTime(),"yyyy"));
 }else if("month".equals(parameter.getTimeStyle())){


  orgBalanceSheetsQuery.setParameter("startYear", com.honebay.spv.core.utils.DateUtil.formatDate(parameter.getStartTime(),"yyyy-MM"));

  orgBalanceSheetsQuery.setParameter("endYear", com.honebay.spv.core.utils.DateUtil.formatDate(parameter.getEndTime(),"yyyy-MM"));


 }




 if (parameterCompanyIds.size()>0) {

  for (int i = 0; i < parameterCompanyIds.size(); i++) {
  orgBalanceSheetsQuery.setParameter("s"+i, parameterCompanyIds.get(i));
  }
 }


 //获取数据
 List resultList = orgBalanceSheetsQuery.getResultList();


 System.out.println("resultList==="+resultList);

 //给数据设置属性
 for (int i = 0; i < resultList.size(); i++) {
  Object o = resultList.get(i);
  Object[] cells = (Object[]) o;
  Map map = new HashMap<>();
  if(cells.length == 3){
  continue;
  }
  for (int j = 0; j definedReportFormVOList = new ArrayList<>();
 Map stringListMap = new HashMap<>();



 //定义返回的格式
 for (Map map : result) {
  String reportingYear = (String) map.get("reportingYear");
  String reportingMonth = (String) map.get("reportingMonth");
  String reportingDate = reportingYear+"-"+reportingMonth;
  //如果时间类型是年
  if ("year".equals(parameter.getTimeStyle())) {
  List list = stringListMap.get(reportingYear);
  if (list != null) {
   list.add(map);
   stringListMap.put(reportingYear,list);
  }else{
   List inner =new ArrayList();
   inner.add(map);
   stringListMap.put(reportingYear,inner);
  }
  }else{//如果为月

  List list = stringListMap.get(reportingDate);
  if (list != null) {
   list.add(map);
   stringListMap.put(reportingDate,list);
  }else{
   List inner =new ArrayList();
   inner.add(map);
   stringListMap.put(reportingDate,inner);
  }
  }

 }

 System.out.println("stringListMap == "+stringListMap);


 for (Map.Entry entry : stringListMap.entrySet()) {
  DefinedReportFormVO formVO = new DefinedReportFormVO();
  formVO.setTime(entry.getKey());

  if(parameter.isAvg()==true){
  formVO.setArr(setAvg(entry.getValue(),fieldNames));
  }else{
  formVO.setArr(entry.getValue());
  }

  definedReportFormVOList.add(formVO);

 }


 return definedReportFormVOList;
 }

指标实体

/**
 * 统计指标
 */
@Entity
@Table(name = "org_statistical_indicators", catalog = "zhsupervision")
public class OrgStatisticalIndicators {
 @Id
 @GeneratedValue
 private Long id;
 /**
 * 前端显示名
 */
 private String name;
 /**
 * 表属性
 */
 private String tableField;
 /**
 * 表名称
 */
 private String tableName;
 /**
 * 创建时间
 */
 private Date createTime;
 /**
 * 更新时间
 */
 private Date updateTime;
 /**
 * 删除标识
 */
 private String delFlag;
 //父节点
 private Long pId;
 //属性
 private String field;
 //该指标查询月的时候是否查询 
 private String monthQuery;
 //该指标查询年的时候是否查询 
 private String yearQuery;

 public String getMonthQuery() {
 return monthQuery;
 }

 public void setMonthQuery(String monthQuery) {
 this.monthQuery = monthQuery;
 }

 public String getYearQuery() {
 return yearQuery;
 }

 public void setYearQuery(String yearQuery) {
 this.yearQuery = yearQuery;
 }

 public String getField() {
 return field;
 }

 public void setField(String field) {
 this.field = field;
 }

 public Long getId() {
 return id;
 }

 public void setId(Long id) {
 this.id = id;
 }

 public Long getpId() {
 return pId;
 }

 public void setpId(Long pId) {
 this.pId = pId;
 }

 public String getName() {
 return name;
 }

 public void setName(String name) {
 this.name = name;
 }

 public String getTableField() {
 return tableField;
 }

 public void setTableField(String tableField) {
 this.tableField = tableField;
 }

 public String getTableName() {
 return tableName;
 }

 public void setTableName(String tableName) {
 this.tableName = tableName;
 }

 public Date getCreateTime() {
 return createTime;
 }

 public void setCreateTime(Date createTime) {
 this.createTime = createTime;
 }

 public Date getUpdateTime() {
 return updateTime;
 }

 public void setUpdateTime(Date updateTime) {
 this.updateTime = updateTime;
 }

 public String getDelFlag() {
 return delFlag;
 }

 public void setDelFlag(String delFlag) {
 this.delFlag = delFlag;
 }
}

指标Service

/**
 * 统计指标服务类
 */
public interface OrgStatisticalIndicatorsService {
 /**
 * 根据id获取
 * @param id
 * @return
 */
 OrgStatisticalIndicators findOrgStatisticalIndicatorsById(Long id);

 /**
 * 根据表名查询
 */
 List findOrgStatisticalIndicatorsByTableName(String name);

}

指标serviceImpl

@Service
public class OrgStatisticalIndicatorsServiceImpl extends BaseServiceImpl implements OrgStatisticalIndicatorsService {

 @Autowired
 private OrgStatisticalIndicatorsRespository respository;
 
 @Override
 public OrgStatisticalIndicators findOrgStatisticalIndicatorsById(Long id) {
 return respository.findByIdAndAndDelFlag(id);
 }

 @Override
 public List findOrgStatisticalIndicatorsByTableName(String name) {
 return respository.findOrgStatisticalIndicatorsByTableName(name);
 }
}

指标repository

public interface OrgStatisticalIndicatorsRespository extends JpaSpecificationExecutor {
 
 @Query(value = "select * from org_statistical_indicators WHERE ID=?1 and del_flag = '0'",nativeQuery = true)
 OrgStatisticalIndicators findByIdAndAndDelFlag(Long id);

 @Query(value = "select * from org_statistical_indicators WHERE del_flag = '0' and NAME =?1",nativeQuery = true)
 OrgStatisticalIndicators findOrgStatisticalIndicatorsByName(String name);
}

这个repository要继承 extends JpaRepository 才可以，写漏了。

上面使用了union 进行表之间的关联查询，关联的表有点多，所以代码有些长，同时因为表多，指标（表的属性）有500多个，无法确定查询的返回实体，所以只能自己根据数据的返回给数据绑定属性。

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分享题目：Java如何使用Query动态拼接SQL详解
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