When this project about GPS optimization requirements, find related query function menu page together a DAO interface implementation class, I immediately looked listAll, pre, next, countAll method highly similar business code,
This has been explained that the DAO plays a non-single principle , which bears the inquiry multiple menu systems.
A. in common is common query table ca_app_info, co-operation or Hibernate object VCaAppInfo .
B. The difference reflected at the following aspects: 1, contains HQL and SQL queries. 2, where different conditions (for dynamic filtering of data and addition of a determined fight StringBuffer object (i.e., SQL / HQL) The conditions page form) .
The four methods involve query (listAll, pre, next, countAll method highly similar business code), the code is redundant, is not conducive to maintenance.
Therefore, take this opportunity, the current demand for GPS queries involving four pages to reconstruct, to extract the four documents implementation class, inherit the abstract class unity, internal maintenance-related SQL or HQL query logic, only the caller on the line configuration file ,
Can generate different implementation class, improve scalability, maintainability. Before reconstruction code, click the link to view method: listAll, pre, next, countAll, you know the.
Source code snippet: how it codes. . .
@Override
public List<VCaAppInfo> pre(VCaAppInfoId ci, int pn, int defaultPageSize) {
// TODO Auto-generated method stub
StringBuffer sb = new StringBuffer();
sb.append("from VCaAppInfo v where 1=1");
List<Object> listParams = new ArrayList<Object>();
AbstractWhereExecutor<VCaAppInfoId> whereExecutor;
WhereContext whereContext = new WhereContext(ci,sb,listParams,WhereContext.Strategy.HQL);
String status = ci.getStatus();
if (StringUtil.checkStatus(status)) {
sb.append(" and v.id.status in (?)");
listParams.add(status);
sb.append(" and v.AUserId=? ");
listParams.add(ci.getUser().getUserId());
/*
* if("23".equals(status)){ //根据REFUSE_STATUS拒绝状态查询
* sb.append(" and v.refuseStatus in (?)");
* listParams.add(ci.getRefusestatus()); }else
* if("24".equals(status)){ sb.append(" and v.refuseStatus <> 3"); }
*/
if ("23".equals(status)) { // 根据REFUSE_STATUS拒绝状态查询
sb.append(" and v.refuseStatus in (?)");
listParams.add(ci.getRefusestatus());
} else if ("24".equals(status) && !"3".equals(ci.getRefusestatus())) { // refusestatus
// =
// 0
// 1
// 终审
sb.append(" and v.refuseStatus <> 3");
} else if ("3".equals(ci.getRefusestatus())) { // 3 复核拒绝
sb.append(" and v.refuseStatus = 3");
}
} else if ("80".equals(ci.getStatus())) { // 复审审批页面 显示自己审批的和信贷经理退回审批的
// 150123
sb.append(" and v.id.status in('23','30')");
sb.append(" and v.AUserId=? ");
listParams.add(ci.getUser().getUserId());
} else if ("-27".equals(status)) { // 经销商上传GPS安装单 150302
sb.append(" and (v.isGps ='0' or v.isGps ='2') and v.gpsFee<>0 and v.gpsFee !='' and v.gpsFee is not null and v.manageApprovalTime is not null and v.id.status not in('11','12') ");
// 经销商用户只能查看该门店单子 其他用户查看所有
Set<SyUserDealer> ds = ci.getUser().getSyUserDealers();
if (ds.size() != 0) {
sb.append(" and v.id.dealerCode in(");
Iterator<SyUserDealer> it = ci.getUser().getSyUserDealers()
.iterator();
while (it.hasNext()) {
SyUserDealer d = it.next();
int dealerCode = d.getId().getDealerCode();
sb.append(dealerCode + " ,");
}
String allhql = sb.substring(0, sb.length() - 1);
allhql += ") ";
sb.setLength(0);// 清空 后加上
sb.append(allhql);
}
} else if ("-28".equals(status)) { // GPS维护 已上传GPS安装
whereExecutor = new InstalledGpsQueryExecutor(whereContext);
whereExecutor.execute();
} else if ("-29".equals(status)) { // GPS维护
whereExecutor = new UnInstallGpsQueryExecutor(whereContext);
whereExecutor.execute();
} else if ("-30".equals(status)) { // 贷后资料维护
sb.append(" and (v.ALOANARRIVE is null or v.ALOANARRIVE!='1') and v.id.status='32' ");
if (ci.getIsOld() != null) {
sb.append(" and v.isOld=? ");
listParams.add(ci.getIsOld());
}
if (ci.getPostLoanStatus() != null) {// 新车贷后资料上传状态(包括花乡的二手车 即先放款后抵押)
if ("0".equals(ci.getPostLoanStatus())) {// 未上传
sb.append(" and (v.postLoanStatus is null or v.postLoanStatus='0' ) ");
} else if ("1".equals(ci.getPostLoanStatus())) {// 已上传
sb.append(" and v.postLoanStatus='1' ");
} else if ("2".equals(ci.getPostLoanStatus())) {// 审批退回
sb.append(" and v.postLoanStatus='2' ");
} else if ("3".equals(ci.getPostLoanStatus())) {// 审批通过
sb.append(" and v.postLoanStatus='3' ");
}
}
} else if ("-31".equals(status)) { // 贷后资料维护回退
sb.append(" and v.ALOANARRIVE='1' and v.id.status='32' ");
} else if ("-32".equals(status)) { // 新车等待上传贷后资料
sb.append(" and v.id.status='32' and ifnull(v.ALOANARRIVE,'')!='1' ");
if (ci.getIsOld() != null) {
sb.append(" and v.isOld=? ");
listParams.add(ci.getIsOld());
}
if (ci.getPostLoanStatus() != null) {
if ("0".equals(ci.getPostLoanStatus())) {// 未上传
sb.append(" and (v.postLoanStatus is null or v.postLoanStatus='0') ");
} else if ("1".equals(ci.getPostLoanStatus())) {// 已上传
sb.append(" and v.postLoanStatus='1' ");
} else if ("2".equals(ci.getPostLoanStatus())) {// 审批退回
sb.append(" and v.postLoanStatus='2' ");
} else if ("3".equals(ci.getPostLoanStatus())) {// 审批通过
sb.append(" and v.postLoanStatus='3' ");
}
} else {
sb.append(" and ifnull(v.postLoanStatus,'')!='1' and ifnull(v.postLoanStatus,'')!='3' ");// 所有，不显示已上传的申请单和审批通过的
}
// 经销商用户只能查看该门店单子 其他用户查看所有
Set<SyUserDealer> ds = ci.getUser().getSyUserDealers();
if (ds.size() != 0) {
sb.append(" and v.id.dealerCode in(");
Iterator<SyUserDealer> it = ci.getUser().getSyUserDealers()
.iterator();
while (it.hasNext()) {
SyUserDealer d = it.next();
int dealerCode = d.getId().getDealerCode();
sb.append(dealerCode + " ,");
}
String allhql = sb.substring(0, sb.length() - 1);
allhql += ") ";
sb.setLength(0);// 清空 后加上
sb.append(allhql);
}
} else if ("-33".equals(status)) {// 经销商GPS安装列表，TODO zhaozhaoxin
// 20170411 add
sb.append(" and v.gpsFee<>0 and v.gpsFee !='' and v.gpsFee is not null and v.manageApprovalTime is not null and status in('15','16','17','18','19','25','26','27','28','29','32') ");
// 经销商用户只能查看该门店单子 其他用户查看所有
Set<SyUserDealer> ds = ci.getUser().getSyUserDealers();
if (ds.size() != 0) {
sb.append(" and v.id.dealerCode in(");
Iterator<SyUserDealer> it = ci.getUser().getSyUserDealers()
.iterator();
while (it.hasNext()) {
SyUserDealer d = it.next();
int dealerCode = d.getId().getDealerCode();
sb.append(dealerCode + " ,");
}
String allhql = sb.substring(0, sb.length() - 1);
allhql += ") ";
sb.setLength(0);// 清空 后加上
sb.append(allhql);
}
} else {
sb.append(" and v.id.status in (?)");
listParams.add(status);
// TODO zhaozhaoxin 20170308 add 进行分组查询
if (isRoleQueryData(ci.getUser())) {
getUserGroupIds(sb, ci.getUser(), status, true);
} else {
return null;
}
}
if (ci.getFlowSeq() != null) {
sb.append(" and v.flowSeq= ?");
listParams.add(ci.getFlowSeq());
}
if (ci.getDealerName() != null) {
sb.append(" and v.id.dealerName like ?");
listParams.add("%" + ci.getDealerName() + "%");
}
if (ci.getAppCode() != null) {
sb.append(" and v.id.appCode = ?");
listParams.add(ci.getAppCode());
}
if (ci.getProppserName() != null) {
sb.append(" and v.id.proppserName like ?");
listParams.add("%" + ci.getProppserName() + "%");
}
if (ci.getIsLcv() != null) {
sb.append(" and v.isLcv = ?");
listParams.add(ci.getIsLcv());
}
if (ci.getAppTime() != null) {
sb.append(" and date_format(v.id.appTime,'%Y%m%d') >= ?");
listParams.add(DateUtil.getDateFormatE(ci.getAppTime()));
}
if (ci.getAppTime2() != null) {
sb.append(" and date_format(v.id.appTime,'%Y%m%d') <= ?");
listParams.add(DateUtil.getDateFormatE(ci.getAppTime2()));
}
if (ci.getUpdateTime1() != null) {
sb.append(" and date_format(v.updateTime,'%Y%m%d') >= ?");
listParams.add(DateUtil.getDateFormatE(ci.getUpdateTime1()));
}
if (ci.getUpdateTime2() != null) {
sb.append(" and date_format(v.updateTime,'%Y%m%d') <= ?");
listParams.add(DateUtil.getDateFormatE(ci.getUpdateTime2()));
}
if (ci.getLoanDate1() != null) {
sb.append(" and date_format(v.loanTime,'%Y%m%d') >= ?");
listParams.add(DateUtil.getDateFormatE(ci.getLoanDate1()));
}
if (ci.getLoanDate2() != null) {
sb.append(" and date_format(v.loanTime,'%Y%m%d') <= ?");
listParams.add(DateUtil.getDateFormatE(ci.getLoanDate2()));
}
sb.append(" order by v.updateTime asc");// 从小到大排序 先提交的在前面
List<VCaAppInfo> result = queryByHql(sb.toString(), pn,
defaultPageSize, listParams.toArray());
return result;
}Involving four system function menu
1, car loan application management " to be uploaded GPS single installation
2, car loan application management " the GPS installing a single list
3, car loan approval management "GPS single installation did not upload
4, car loan approval management "GPS installing a single uploaded
1, FIG Class
1.1, executor FIG class
1.2, context class diagram
2, the relevant source code
2.1 abstract class: AbstractWhereExecutor
public abstract class AbstractWhereExecutor<T> implements Predicate<WhereContext> {
/**
* 上线文
*/
protected WhereContext<T> context;
/**
* 参数DTO
*/
protected T dto;
/**
* 查询条件
*/
protected StringBuffer queryWhere;
/**
* 构造函数
* @param context 上线文对象
*/
public AbstractWhereExecutor(WhereContext<T> context) {
this.context = context;
}
/**
* 处理接口
*/
public void execute() {
this.execute((e)->{});
}
/**
* 处理接口
* @param after
*/
public void execute(Consumer<WhereContext> after) {
// 初始化
this.prepare();
// 检查参数
this.check(context);
// 执行鉴定
if(this.test(context)){
switch (context.getStrategy()){
case SQL:
sql();
break;
case HQL:
hql();
break;
default:
break;
}
}
// 后置处理
after.accept(context);
}
/**
* 参数检查
* @param context
*/
protected void check(WhereContext context){
Assert.notNull(context.getDto(),"DTO对象为空");
Assert.notNull(context.getStrategy(),"strategy为空");
}
/**
* 初始化参数
*/
protected void prepare(){
this.dto = this.context.getDto();
this.queryWhere = this.context.getQueryWhere();
}
/**
* 由子类实现具体处理SQL条件
*/
protected abstract void sql();
/**
* 由子类实现具体处理HQL条件
*/
protected abstract void hql();
}2.2, the implementation class: InstalledGpsQueryExecutor
public class InstalledGpsQueryExecutor extends AbstractWhereExecutor<VCaAppInfoId> {
/**
* 标示
*/
protected String gpsFlow;
/**
* 审批人
*/
protected Integer approvalUserId;
/**
* 构造函数
*
* @param context 上线文对象
*/
public InstalledGpsQueryExecutor(WhereContext context) {
super(context);
}
@Override
protected void check(WhereContext context) {
super.check(context);
SyUser sessionUser = dto.getUser();
Assert.notNull(sessionUser,"sessionUser为空");
}
@Override
protected void prepare() {
super.prepare();
this.gpsFlow = dto.getGpsFlow();
this.approvalUserId = dto.getUser().getUserId();
}
@Override
protected void sql() {
VCaAppInfoId dto = super.dto;
StringBuffer where = super.queryWhere;
if(this.isMine()){
where.append(" and exists(select 1 from ca_gps_flow f where f.app_code = v.app_code and f.flow_step = 0 and f.approval_user_id = "+this.approvalUserId+") ");
}
where.append(" and v.status not in (11,13) and v.is_Gps ='2' and v.gps_Fee<>0 and v.gps_Fee !='' and v.gps_Fee is not null and v.manage_Approval_Time is not null");
if(!StringUtil.isBlank(dto.getProvince())){
where.append(" and exists(select 1 from Sy_Dealer dr where dr.province = '"+dto.getProvince()+"' and dr.dealer_Code = v.dealer_Code) ");
}
if (!StringUtil.isBlank(dto.getPostLoanStatus())) {
//由于manual_audit_code多个时以";"分割，所以需要使用FIND_IN_SET函数处理 add by 石冬冬 on 2017/9/21
where.append(" and v.app_code IN (SELECT app_code FROM Ca_Car_Gps WHERE del_status=1 and FIND_IN_SET ("+dto.getPostLoanStatus()+",replace(manual_audit_code,';',','))>0 ");
where.append(" GROUP BY app_code) ");
}
}
@Override
protected void hql() {
VCaAppInfoId dto = super.dto;
StringBuffer where = super.queryWhere;
if(this.isMine()){
where.append(" and exists(select 1 from CaGpsFlow f where f.appCode = v.id.appCode and f.flowStep = 0 and f.approvalUserId = " + this.approvalUserId+")");
}
where.append(" and v.id.status not in (11,13) and v.isGps ='2' and v.gpsFee<>0 and v.gpsFee !='' and v.gpsFee is not null and v.manageApprovalTime is not null");
if(!StringUtil.isBlank(dto.getProvince())){
where.append(" and exists(select 1 from SyDealer dr where dr.province = '"+dto.getProvince()+"' and dr.dealerCode = v.id.dealerCode) ");
}
if (!StringUtil.isBlank(dto.getPostLoanStatus())) {
//由于manual_audit_code多个时以";"分割，所以需要使用FIND_IN_SET函数处理 add by 石冬冬 on 2017/9/21
where.append(" and v.id.appCode IN (SELECT appCode FROM CaCarGps WHERE delStatus=1 and find_in_set("+dto.getPostLoanStatus()+",replace(manualAuditCode,';',','))>0 ");
where.append(" GROUP BY appCode) ");
}
}
@Override
public boolean test(WhereContext context) {
VCaAppInfoId dto = (VCaAppInfoId)context.getDto();
return "-28".equals(dto.getStatus());
}
private boolean isMine(){
return "mine".equals(gpsFlow);
}
}
2.3, implementation class: TobeUploadGpsQueryExecutor
public class TobeUploadGpsQueryExecutor extends AbstractWhereExecutor<VCaAppInfoId> {
/**
* 构造函数
*
* @param context 上线文对象
*/
public TobeUploadGpsQueryExecutor(WhereContext context) {
super(context);
}
@Override
protected void check(WhereContext context) {
super.check(context);
SyUser sessionUser = dto.getUser();
Assert.notNull(sessionUser,"sessionUser为空");
}
@Override
protected void sql() {
StringBuffer where = super.queryWhere;
SyUser sessionUser = dto.getUser();
where.append(" and (v.is_Gps ='0' or v.is_Gps ='2') and v.gps_Fee<>0 and v.gps_Fee !='' and v.gps_Fee is not null and v.manage_Approval_Time is not null and v.status not in('11','12') ");
GpsUtil.appendDealerCodes(sessionUser,(list) -> {
String condition = MessageFormat.format(" and v.dealer_Code in({0})", StringUtils.join(list,","));
where.append(condition);
});
}
@Override
protected void hql() {
StringBuffer where = super.queryWhere;
SyUser sessionUser = dto.getUser();
where.append(" and (v.isGps ='0' or v.isGps ='2') and v.gpsFee<>0 and v.gpsFee !='' and v.gpsFee is not null and v.manageApprovalTime is not null and v.id.status not in('11','12') ");
GpsUtil.appendDealerCodes(sessionUser,(list) -> {
String condition = MessageFormat.format(" and v.id.dealerCode in({0})", StringUtils.join(list,","));
where.append(condition);
});
}
@Override
public boolean test(WhereContext context) {
VCaAppInfoId dto = (VCaAppInfoId)context.getDto();
return "-27".equals(dto.getStatus());
}
}
2.4, implementation class: UnInstalledGpsQueryExecutor
/**
* @description: 车贷审批管理》GPS安装单未上传
* @Date : 上午10:17 2017/11/17
* @Author : 石冬冬-Heil Hitler([email protected])
*/
public class UnInstalledGpsQueryExecutor extends AbstractWhereExecutor<VCaAppInfoId> {
/**
* 标示
*/
protected String gpsFlow;
/**
* 审批人
*/
protected Integer approvalUserId;
/**
* 构造函数
*
* @param context 上线文对象
*/
public UnInstalledGpsQueryExecutor(WhereContext context) {
super(context);
}
@Override
protected void check(WhereContext context) {
super.check(context);
SyUser sessionUser = dto.getUser();
Assert.notNull(sessionUser,"sessionUser为空");
}
@Override
protected void prepare() {
super.prepare();
this.gpsFlow = dto.getGpsFlow();
this.approvalUserId = dto.getUser().getUserId();
}
@Override
protected void sql() {
StringBuffer where = super.queryWhere;
if(this.isMine()){
where.append(" and exists(select 1 from ca_gps_flow f where f.app_code = v.app_code and f.flow_step = 0 and f.approval_user_id = "+this.approvalUserId+")");
}
where.append(" and v.status not in (11,13) and v.is_Gps ='0' and v.gps_Fee<>0 and v.gps_Fee !='' and v.gps_Fee is not null and v.manage_Approval_Time is not null");
if(!StringUtil.isBlank(dto.getProvince())){
where.append(" and exists(select 1 from Sy_Dealer dr where dr.province = '"+dto.getProvince()+"' and dr.dealer_Code = v.dealer_Code) ");
}
}
@Override
protected void hql() {
VCaAppInfoId dto = super.dto;
StringBuffer where = super.queryWhere;
if(this.isMine()){
where.append(" and exists(select 1 from CaGpsFlow f where f.appCode = v.id.appCode and f.flowStep = 0 and f.approvalUserId = "+this.approvalUserId+")");
}
where.append(" and v.id.status not in (11,13) and v.isGps ='0' and v.gpsFee<>0 and v.gpsFee !='' and v.gpsFee is not null and v.manageApprovalTime is not null");
if(!StringUtil.isBlank(dto.getProvince())){
where.append(" and exists(select 1 from SyDealer dr where dr.province = '"+dto.getProvince()+"' and dr.dealerCode = v.id.dealerCode) ");
}
}
@Override
public boolean test(WhereContext context) {
VCaAppInfoId dto = (VCaAppInfoId)context.getDto();
return "-29".equals(dto.getStatus());
}
private boolean isMine(){
return "mine".equals(gpsFlow);
}
}
2.5, implementation class: UploadedGpsQueryExecutor
public class UploadedGpsQueryExecutor extends AbstractWhereExecutor<VCaAppInfoId> {
private final String STATUS_SCOPE = "'15','16','17','18','19','25','26','27','28','29','32'";
/**
* 构造函数
*
* @param context 上线文对象
*/
public UploadedGpsQueryExecutor(WhereContext context) {
super(context);
}
@Override
protected void check(WhereContext context) {
super.check(context);
SyUser sessionUser = dto.getUser();
Assert.notNull(sessionUser,"sessionUser为空");
}
@Override
protected void sql() {
VCaAppInfoId dto = super.dto;
StringBuffer where = super.queryWhere;
SyUser sessionUser = dto.getUser();
where.append(" and v.gps_Fee<>0 and v.gps_Fee !='' and v.gps_Fee is not null and v.manage_Approval_Time is not null and status in("+STATUS_SCOPE+") ");
GpsUtil.appendDealerCodes(sessionUser,(list) -> {
String condition = MessageFormat.format(" and v.dealer_Code in({0})", StringUtils.join(list,","));
where.append(condition);
});
}
@Override
protected void hql() {
VCaAppInfoId dto = super.dto;
StringBuffer where = super.queryWhere;
SyUser sessionUser = dto.getUser();
where.append(" and v.gpsFee<>0 and v.gpsFee !='' and v.gpsFee is not null and v.manageApprovalTime is not null and status in("+STATUS_SCOPE+") ");
GpsUtil.appendDealerCodes(sessionUser,(list) -> {
String condition = MessageFormat.format(" and v.id.dealerCode in({0})", StringUtils.join(list,","));
where.append(condition);
});
}
@Override
public boolean test(WhereContext context) {
VCaAppInfoId dto = (VCaAppInfoId)context.getDto();
return "-33".equals(dto.getStatus());
}
}
2.6, the caller
