spring结合设计模式之策略模式

策略模式基本概念：

一个接口或者抽象类，里面两个方法（一个方法匹配类型，一个可替换的逻辑实现方法）
不同策略的差异化实现(就是说，不同策略的实现类)

使用策略模式替换判断，使代码更加优雅。

实现：

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("蓝票申请");return ResultUtil.fail("不支持此开票类型！");}}

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("纸票待开号码查询");return ResultUtil.fail("不支持此开票类型！");}}

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 {/***  发票业务* @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、处理请求参数log.info("==> 同步开票对外接口，请求参数：{}",serviceid);//3、校验应用及验签JSONObject json = new JSONObject();json.put("serviceid", serviceid);//5、分发调用业务接口Result ret = ResultUtil.success(invoiceKjFactory.getInstance(serviceid).service(json));return ret;}}

调用

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

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