泛型模板化设计使用-订单搜索接口
1.定义订单搜索接口
代码语言：javascript复制package com.example.core.mydemo.java.templateQuery;
//暂不使用该接口
//public interface SearchService<T extends BaseRequest,F extends BaseResponse>{
public interface SearchService<T,F>{
/**
* 订单搜索
*/
F orderSearch(T reqVO) throws Exception;
}2.定义抽象类
代码语言：javascript复制package com.example.core.mydemo.java.templateQuery;
import java.io.IOException;
/**
* 接口和抽象实现类不能同时含有<T,F>
* 'orderSearch(T)' in 'com.example.core.mydemo.java.templateQuery.AbstractSearchTemplate' clashes with 'orderSearch(T)' in 'com.example.core.mydemo.java.templateQuery.SearchService'; both methods have same erasure, yet neither overrides the other
* @param <T>
* @param <F>
*/
//public abstract class AbstractSearchTemplate<T,F> implements SearchService{
//public abstract class AbstractSearchTemplate<T extends BaseRequest,F extends BaseResponse>{ //去掉 实现 SearchService
public abstract class AbstractSearchTemplate<T,F>{ //这样定义也可以，不过 T extends BaseRequest,F extends BaseResponse 规范了类型
public F orderSearch(T reqVO) throws Exception {
return templateMethod(reqVO);
}
private F templateMethod(T reqVO) throws Exception {
System.out.println("构建查询条件，准备参数");
page(reqVO);
System.out.println("构建查询条件，分页");
filter(reqVO);
System.out.println("构建查询条件，过滤");
sort(reqVO);
System.out.println("构建查询条件，排序");
return transform(reqVO);
}
/**
* 分页
*/
protected abstract void page(T reqVO);
/**
* 过滤
*/
protected abstract void filter(T reqVO);
/**
* 排序
*/
protected abstract void sort(T reqVO);
/**
* 转换
*/
protected abstract F transform(T reqVO) throws IOException;
}3.定义请求基类和返回基类
代码语言：javascript复制package com.example.core.mydemo.java.templateQuery;
public class BaseRequest {
}
package com.example.core.mydemo.java.templateQuery;
public class BaseResponse {
}4.第一个实现类
代码语言：javascript复制package com.example.core.mydemo.java.templateQuery;
public class AppRequest extends BaseRequest{
/**
* app订单号
*/
private String orderNo;
public String getOrderNo() {
return orderNo;
}
public void setOrderNo(String orderNo) {
this.orderNo = orderNo;
}
}
package com.example.core.mydemo.java.templateQuery;
public class AppResponse extends BaseResponse{
/**
* 返回手机号
*/
private String mobile;
/**
* 返回姓名
*/
private String realName;
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getRealName() {
return realName;
}
public void setRealName(String realName) {
this.realName = realName;
}
}
package com.example.core.mydemo.java.templateQuery;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.Gson;
import java.io.IOException;
public class AppSearchServiceImpl extends AbstractSearchTemplate<AppRequest,AppResponse>{
@Override
protected void page(AppRequest reqVO) {
System.out.println("分页：" new Gson().toJson(reqVO));
}
@Override
protected void filter(AppRequest reqVO) {
System.out.println("过滤：" new Gson().toJson(reqVO));
}
@Override
protected void sort(AppRequest reqVO) {
System.out.println("排序：" new Gson().toJson(reqVO));
}
@Override
protected AppResponse transform(AppRequest reqVO) throws IOException {
System.out.println("数据转换：" new Gson().toJson(reqVO));
AppResponse appResponse = new AppResponse();
appResponse.setMobile("13100000000");
appResponse.setRealName("测试");
//外部调用返回的json字符串,模拟将json转换到response对象
AppResponse t = JSONObject.parseObject(new Gson().toJson(appResponse), AppResponse.class);
return t;
}
}5.第二个实现类
代码语言：javascript复制package com.example.core.mydemo.java.templateQuery;
public class ConsoleRequest extends BaseRequest{
/**
* 管理后台交易来源查询
*/
private String source;
public String getSource() {
return source;
}
public void setSource(String source) {
this.source = source;
}
}
package com.example.core.mydemo.java.templateQuery;
public class ConsoleResponse extends BaseResponse{
/**
* 管理后台操作人
*/
private String operator;
/**
* 订单时间
*/
private String orderTime;
public String getOperator() {
return operator;
}
public void setOperator(String operator) {
this.operator = operator;
}
public String getOrderTime() {
return orderTime;
}
public void setOrderTime(String orderTime) {
this.orderTime = orderTime;
}
}
package com.example.core.mydemo.java.templateQuery;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.Gson;
import java.io.IOException;
public class ConsoleSearchServiceImpl extends AbstractSearchTemplate<ConsoleRequest,ConsoleResponse>{
@Override
protected void page(ConsoleRequest reqVO) {
System.out.println("分页：" new Gson().toJson(reqVO));
}
@Override
protected void filter(ConsoleRequest reqVO) {
System.out.println("过滤：" new Gson().toJson(reqVO));
}
@Override
protected void sort(ConsoleRequest reqVO) {
System.out.println("排序：" new Gson().toJson(reqVO));
}
@Override
protected ConsoleResponse transform(ConsoleRequest reqVO) throws IOException {
System.out.println("数据转换：" new Gson().toJson(reqVO));
ConsoleResponse consoleResponse = new ConsoleResponse();
consoleResponse.setOperator("超级管理员");
consoleResponse.setOrderTime("2024-04-19 16:41:00");
//外部调用返回的json字符串,模拟将json转换到response对象
ConsoleResponse t = JSONObject.parseObject(new Gson().toJson(consoleResponse), ConsoleResponse.class);
return t;
}
}6.测试类
代码语言：javascript复制package com.example.core.mydemo.java.templateQuery;
import com.google.gson.Gson;
/**
* output:
* 构建查询条件，准备参数
* 分页：{"orderNo":"DD123456789"}
* 构建查询条件，分页
* 过滤：{"orderNo":"DD123456789"}
* 构建查询条件，过滤
* 排序：{"orderNo":"DD123456789"}
* 构建查询条件，排序
* 数据转换：{"orderNo":"DD123456789"}
* app查询返回结果：{"mobile":"13100000000","realName":"测试"}
* 构建查询条件，准备参数
* 分页：{"source":"3"}
* 构建查询条件，分页
* 过滤：{"source":"3"}
* 构建查询条件，过滤
* 排序：{"source":"3"}
* 构建查询条件，排序
* 数据转换：{"source":"3"}
* console查询返回结果：{"operator":"超级管理员","orderTime":"2024-04-19 16:41:00"}
*/
public class TemplateQueryTest {
public static void main(String[] args) throws Exception{
AppSearchServiceImpl app = new AppSearchServiceImpl();
AppRequest appRequest = new AppRequest();
appRequest.setOrderNo("DD123456789");
AppResponse appResponse = app.orderSearch(appRequest);
System.out.println("app查询返回结果：" new Gson().toJson(appResponse));
ConsoleSearchServiceImpl console = new ConsoleSearchServiceImpl();
ConsoleRequest consoleRequest = new ConsoleRequest();
consoleRequest.setSource("3");
ConsoleResponse consoleResponse = console.orderSearch(consoleRequest);
System.out.println("console查询返回结果：" new Gson().toJson(consoleResponse));
}
}
