公司最近在做聚合领取的性能，原来领取计划是不同的领取商户不同的业务解决，扩展性极差，且每新增一个业务商户都要独自开发一套领取接口，很显著这违反了OOP的思维。策略模式的组成部分有三局部
环境类(Context):用一个ConcreteStrategy对象来配置。保护一个对Strategy对象的援用。可定义一个接口来让Strategy拜访它的数据。形象策略类(Strategy):定义所有反对的算法的公共接口。 Context应用这个接口来调用某ConcreteStrategy定义的算法。 具体策略类(ConcreteStrategy):以Strategy接口实现某具体算法。领取形式的组成也有三局部
领取策略接口(PayStrategy):定义领取形式 具体领取形式(H5PayStrategy、WxPayStrategy、依据本人的):具体的领取算法 领取策略上下文(PayStrategyContent):治理所有领取形式的援用，并依据用户抉择援用对应的领取形式。代码实现(本案例是接的银联领取) 领取策略接口（PayStrategy）
/***@program:traffic-resource*@description领取策略接口*@author:belive*@create:2020-12-2521:06**/publicinterfacePayStrategy{/***领取接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@param param*@returnStringjson字符串*/RestRes<String>consumeApply(Stringparam);/***查问领取后果接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@param param*@returnStringjson字符串*/RestRes<String>consumeApplyDetail(Stringparam);/***退款接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@param param*@returnStringjson字符串*/RestRes<String>refund(Stringparam);/***查问退款后果接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@param param*@returnStringjson字符串*/RestRes<String>refundQuery(Stringparam);/***敞开订单接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@param param*@returnStringjson字符串*/RestRes<String>depositApply(Stringparam);具体领取形式(MiniPayStrategy) 本案例就以扫码领取为例
/***@program:traffic-resource*@description*@author:belive*@create:2020-12-2521:18**/@Slf4j@ServicepublicclassQrCodePayStrategyimplementsPayStrategy{@Value("${unionPay.url.qrcode_get_qrcode}")privateStringqrcode_get_qrcode;@OverridepublicRestRes<String>consumeApply(Stringbody){RestRes<String>restRes=newRestRes<>();TransactionHttptransactionHttp=newTransactionHttp();Stringresult=transactionHttp.send("https://api-mop.chinaums.com/v1/netpay/bills/get-qrcode",body);JSONObjectresultObj=JSON.parseObject(result);if("SUCCESS".equals(resultObj.getString("errCode"))){restRes.setMessage("获取领取链接胜利");restRes.setCode(0);}else{restRes.setMessage("获取领取链接失败");restRes.setCode(1000);}restRes.setData(result);Return restRes;}@OverridepublicRestRes<String>consumeApplyDetail(Stringparam){Return null;}@OverridepublicRestRes<String>refund(Stringparam){Return null;}@OverridepublicRestRes<String>refundQuery(Stringparam){Return null;}@OverridepublicRestRes<String>depositApply(Stringparam){Return null;}}领取策略上下文(PayStrategyContent)
/***@program:traffic-resource*@description领取策略上下文*@author:belive*@create:2020-12-2521:19**/@ComponentpublicclassPayStrategyContent{/**策略实例汇合*/ privateConcurrentHashMap<String,PayStrategy>strategyMap=newConcurrentHashMap<>(20);/***注入策略实例*如果应用的是结构器注入，可能会有多个参数注入进来。**如果应用的是field反射注入**如果应用的是setter办法注入，那么你将不能将属性设置为final。**@paramstrategyMap*留神注入类型要是Map根底类型*/@AutowiredpublicPayStrategyContent(Map<String,PayStrategy>strategyMap){ //清空集合数据 this.strategyMap.clear(); if(!CollectionUtils.isEmpty(strategyMap)){ strategyMap.forEach((beanName,payStrategy)->{ if(StringUtils.isEmpty(beanName)||payStrategy==null){ return; } this.strategyMap.put(beanName.toLowerCase(),payStrategy); }); } }/***抉择领取形式*小程序、H5、扫码**@parampaymentEnums**@returnRemoteResult*/publicRestRes<String>consumeApply(PaymentEnumspaymentEnums,Stringparam){if(CollectionUtils.isEmpty(strategyMap)){thrownewApiException(ErrorCodeEnum.UNION05);}returnthis.strategyMap.get(paymentEnums.getBeanName()).consumeApply(param);}/***查问领取后果接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@parampaymentEnums**@returnRemoteResult*/publicRestRes<String>consumeApplyDetail(PaymentEnumspaymentEnums,Stringparam){if(CollectionUtils.isEmpty(strategyMap)){thrownewApiException(ErrorCodeEnum.UNION05);}returnthis.strategyMap.get(paymentEnums.getBeanName()).consumeApplyDetail(param);}/***退款接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@parampaymentEnums**@returnRemoteResult*/publicRestRes<String>refund(PaymentEnumspaymentEnums,Stringparam){if(CollectionUtils.isEmpty(strategyMap)){thrownewApiException(ErrorCodeEnum.UNION05);}returnthis.strategyMap.get(paymentEnums.getBeanName()).refund(param);}/***查问退款后果接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@parampaymentEnums**@returnRemoteResult*/publicRestRes<String>refundQuery(PaymentEnumspaymentEnums,Stringparam){if(CollectionUtils.isEmpty(strategyMap)){thrownewApiException(ErrorCodeEnum.UNION05);}returnthis.strategyMap.get(paymentEnums.getBeanName()).refundQuery(param);}/***敞开订单接口*1.小程序领取*2.h5领取*3.扫码领取*4.app领取**@parampaymentEnums**@returnRemoteResult*/publicRestRes<String>depositApply(PaymentEnumspaymentEnums,Stringparam){if(CollectionUtils.isEmpty(strategyMap)){thrownewApiException(ErrorCodeEnum.UNION05);}returnthis.strategyMap.get(paymentEnums.getBeanName()).depositApply(param);} 领取形式枚举(PaymentEnums)
/***@program:traffic-resource*领取形式枚举对象*code->领取形式别名*beanName->实例的名称*@author:belive*@create:2020-12-2521:00**/publicenumPaymentEnums{/**领取形式*/H5_PAY("H5_PAY",H5PayStrategy.class.getSimpleName()),MINI_PAY("MINI_PAY",MiniPayStrategy.class.getSimpleName()),QR_CODE_PAY("QR_CODE_PAY",QrCodePayStrategy.class.getSimpleName()),;/***枚举定义+形容*/privateStringcode;privateStringbeanName;PaymentEnums(Stringcode,StringbeanName){this.code=code;this.beanName=StringUtils.isNotEmpty(beanName)?beanName.toLowerCase():null;}/***依据code获取对应的枚举对象*/publicstaticPaymentEnumsgetEnum(Stringcode){PaymentEnums[]values=PaymentEnums.values();if(null!=code&&values.length>0){for(PaymentEnumsvalue:values){if(value.code.equals(code)){returnvalue;}}}returnnull;}/***该code在枚举列表code属性是否存在*/publicstaticbooleancontainsCode(Stringcode){PaymentEnumsanEnum=getEnum(code);returnanEnum!=null;}/***判断code与枚举中的code是否雷同*/publicstaticbooleanequals(Stringcode,PaymentEnumscalendarSourceEnum){returncalendarSourceEnum.code.equals(code);}publicStringgetCode(){returncode;}publicStringgetBeanName(){returnbeanName;}}自定义Bean加载(PayStrategyContentConfig)
/***@program: traffic-resource*@description*@author: belive*@create: 2020-12-3023:07**/@Configurationpublic class PayStrategyContentConfig {@Bean public PayStrategyContent payStrategyContentInit() { H5PayStrategy h5PayStrategy = new H5PayStrategy(); MiniPayStrategy miniPayStrategy = new MiniPayStrategy(); QrCodePayStrategy qrCodePayStrategy = new QrCodePayStrategy(); HashMap<String, PayStrategy> strategyMap = new HashMap<>(); strategyMap.put(PaymentEnums.H5_PAY.getBeanName(), h5PayStrategy); strategyMap.put(PaymentEnums.MINI_PAY.getBeanName(), miniPayStrategy); strategyMap.put(PaymentEnums.QR_CODE_PAY.getBeanName(), qrCodePayStrategy); PayStrategyContent payStrategyContent = new PayStrategyContent(strategyMap); return payStrategyContent; }} 领取相干业务调用(代码片段)
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