Java如何使用Query动态拼接SQL详解
作者：零落星尘 发布时间：2022-12-31 09:40:14
标签：java,拼接,sql
前言
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<Map<String, Object>> arr = new ArrayList<>();
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public List<Map<String, Object>> getArr() {
return arr;
}
public void setArr(List<Map<String, Object>> 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<DefinedReportFormVO> defindQuery(DefinedReportFormDTO parameter);
}
实现类ServiceImpl
@SuppressWarnings("unchecked")
@Override
public List<DefinedReportFormVO> 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<Company> 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<String ,String> bool = new HashMap<>();
//指标名
List<String> fieldNames = new ArrayList();
//返回结果
List<Map<String,Object>> 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<String,Object> map = new HashMap<>();
if(cells.length == 3){
continue;
}
for (int j = 0; j<cells.length; j++) {
if (cells[j] != null && !"".equals(cells[j].toString())) {
map.put((String) fieldNames.get(j),cells[j]);
}else{
setField(resultList,fieldNames,map,i,j);
}
}
result.add(map);
}
System.out.println("result == "+result);
List<DefinedReportFormVO> definedReportFormVOList = new ArrayList<>();
Map<String,List> stringListMap = new HashMap<>();
//定义返回的格式
for (Map<String, Object> 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<String,List> 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<OrgStatisticalIndicators> findOrgStatisticalIndicatorsByTableName(String name);
}
指标serviceImpl
@Service
public class OrgStatisticalIndicatorsServiceImpl extends BaseServiceImpl<OrgStatisticalIndicators, String> implements OrgStatisticalIndicatorsService {
@Autowired
private OrgStatisticalIndicatorsRespository respository;
@Override
public OrgStatisticalIndicators findOrgStatisticalIndicatorsById(Long id) {
return respository.findByIdAndAndDelFlag(id);
}
@Override
public List<OrgStatisticalIndicators> 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<T, ID> 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。
来源：https://www.cnblogs.com/xiluonanfeng/p/10245974.html
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