策略模式基本概念：

• 一個接口或者抽象類，里面兩個方法（一個方法匹配類型，一個可替換的邏輯實現方法）
• 不同策略的差異化實現(就是說，不同策略的實現類)

使用策略模式替換判斷，使代碼更加優雅。

實現：

package com.demo.service.sjms;import com.demo.utils.Result;import java.util.Map;public interface InvoiceKj {Result service(Map param) ;
}

package com.demo.service.sjms;import com.demo.utils.Result;
import com.demo.utils.ResultUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;import java.util.Map;@Slf4j
@Component("QDP-FP-10001")
public class InvoiceQdpFp10001  implements InvoiceKj {@Overridepublic Result service(Map param)  {log.info("serviceid===>{}",param.get("serviceid"));log.info("藍票申請");return ResultUtil.fail("不支持此開票類型！");}}

package com.demo.service.sjms;import com.demo.utils.Result;
import com.demo.utils.ResultUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;import java.util.Map;@Slf4j@Component("QDP-FP-10002")
public class InvoiceQdpFp10002 implements InvoiceKj {@Overridepublic Result service(Map param)  {log.info("serviceid===>{}",param.get("serviceid"));log.info("紙票待開號碼查詢");return ResultUtil.fail("不支持此開票類型！");}}

package com.demo.service.sjms;import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;@Slf4j
@Component
public class InvoiceKjFactory {@AutowiredMap<String, InvoiceKj> invoiceKjs = new ConcurrentHashMap<>(36);public InvoiceKj getInstance(String serviceid)  {InvoiceKj invoiceKj = invoiceKjs.get(serviceid);return invoiceKj;}
}

package com.demo.service.sjms;import com.demo.utils.Result;import javax.servlet.http.HttpServletRequest;public interface InvoiceOpenApiService {/***  發票業務* @param request* @return*/Result<String> service(String serviceid, HttpServletRequest request);
}

package com.demo.service.sjms;import cn.hutool.json.JSONObject;
import com.demo.utils.Result;
import com.demo.utils.ResultUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import javax.servlet.http.HttpServletRequest;@Slf4j
@Service("invoiceOpenApiService")
public class InvoiceOpenApiServiceImpl  implements InvoiceOpenApiService {@Autowiredprivate InvoiceKjFactory invoiceKjFactory;public Result<String> service(String serviceid, HttpServletRequest request) {//1、處理請求參數log.info("==> 同步開票對外接口，請求參數：{}",serviceid);//3、校驗應用及驗簽JSONObject json = new JSONObject();json.put("serviceid", serviceid);//5、分發調用業務接口Result ret = ResultUtil.success(invoiceKjFactory.getInstance(serviceid).service(json));return ret;}}

調用

@GetMapping("/invoiceOpenApiService")public Result bbb(String serviceid, HttpServletRequest request) {return invoiceOpenApiService.service(serviceid, request);}