开闭原则是说不修改原有代码的基础上,对于新增加的功能采用实现接口的方法即可实现
策略模式将对象的行为抽象为一个通用的方法,不同的对象实现同一个方法进行重写,可以减少复杂的if else的出现
代码如下
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.ip</groupId> <artifactId>ip-service</artifactId> <version>1.0-SNAPSHOT</version> <properties> <java.version>1.8</java.version> <skipTests>true</skipTests> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Hoxton.SR3</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>2.1.0.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <!--客户端--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <!--tomcat容器--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--添加fastjson依赖--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.7</version> </dependency> <!--lombok依赖--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.16</version> </dependency> <!--mysql驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> <!--springboot整合mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.2</version> </dependency> <!-- 热部署模块 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> <!-- 这个需要为 true 热部署才有效 --> </dependency> <!--java爬虫需要的jar包--> <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.12.2</version> </dependency> <!--判断空的用法 --> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <!--时间日期工具类--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.7</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.8</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <dependency> <groupId>com.squareup.okhttp3</groupId> <artifactId>okhttp</artifactId> <version>3.10.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.lionsoul</groupId> <artifactId>ip2region</artifactId> <version>1.7.2</version> </dependency> <!--RateLimiter的底层是基于令牌桶算法来实现的,来自谷歌的Guava包中--> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>28.0-jre</version> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.6</version> </dependency> <dependency> <groupId>org.lionsoul</groupId> <artifactId>ip2region</artifactId> <version>1.7.2</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> <finalName>server</finalName> </build> </project>
package com.ip.controller.front; import com.ip.bean.CrawlerDTO; import com.ip.config.SpringBeanUtil; import com.ip.handle.strategy.CrawlerHandleStrategy; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; /** * @author yourheart * @Description * @create 2022-04-26 21:40 */ @Controller @RequestMapping("/crawler") @Slf4j public class CrawlerController { /** * 自动获取网页的名称 * @param crawlerDTO * @return */ @PostMapping("/crawlerAddress") @ResponseBody public CrawlerDTO crawlerAddress(@RequestBody CrawlerDTO crawlerDTO){ log.info("【自动获取网页的名称】入参:{}",crawlerDTO); String serverName=crawlerDTO.getUrlDatasource()+"_crawler"; CrawlerHandleStrategy bean = SpringBeanUtil.getBean(serverName, CrawlerHandleStrategy.class); CrawlerDTO crawlerDto = bean.getCrawlerDto(crawlerDTO); return crawlerDto; } }
package com.ip.config; import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.stereotype.Component; /** * @Description: * @Author: Yourheart * @Create: 2022/12/8 18:42 */ @Component public class SpringBeanUtil implements ApplicationContextAware { private static ApplicationContext context; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if (context==null){ context=applicationContext; } } public static ApplicationContext getContext(){ return context; } /** * 通过name找到对应的实例 * @param name * @return */ public static Object getBean(String name){ return getContext().getBean(name); } /** * 通过class获取实例 * @param tClass * @param <T> * @return */ public static <T> T getBean(Class<T> tClass){ return getContext().getBean(tClass); } public static <T> T getBean(String name,Class<T> tClass){ T bean = getContext().getBean(name, tClass); return bean; } }
package com.ip.handle.strategy; import com.ip.bean.CrawlerDTO; /** * @Description: 处理爬虫的策略接口 * @Author: Yourheart * @Create: 2022/12/8 15:15 */ public interface CrawlerHandleStrategy { /** * 通过爬虫获取网页地址的名称 * @param crawlerDTO * @return */ CrawlerDTO getCrawlerDto(CrawlerDTO crawlerDTO); }
package com.ip.handle.strategy.impl; import com.ip.bean.CrawlerDTO; import com.ip.handle.strategy.CrawlerHandleStrategy; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Service; /** * @Description: * @Author: Yourheart * @Create: 2022/12/8 15:38 */ @Slf4j @Service("default_crawler") public class DefaultCrawlerHandleStrategy implements CrawlerHandleStrategy { /** * 通过爬虫获取网页地址的名称 * * @param crawlerDTO * @return */ @Override public CrawlerDTO getCrawlerDto(CrawlerDTO crawlerDTO) { log.info("使用默认方法获取网页地址....."); return null; } }
package com.ip.handle.strategy.impl; import com.ip.bean.CrawlerDTO; import com.ip.handle.strategy.CrawlerHandleStrategy; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Service; /** * @Description: * @Author: Yourheart * @Create: 2022/12/8 15:37 */ @Slf4j @Service("jianshu_crawler") public class JianShuCrawlerHandleStrategy implements CrawlerHandleStrategy { /** * 通过爬虫获取网页地址的名称 * * @param crawlerDTO * @return */ @Override public CrawlerDTO getCrawlerDto(CrawlerDTO crawlerDTO) { log.info("爬虫简书的地址..."); return null; } }
package com.ip.handle.strategy.impl; import com.ip.bean.CrawlerDTO; import com.ip.handle.strategy.CrawlerHandleStrategy; import lombok.extern.slf4j.Slf4j; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import org.springframework.stereotype.Service; import java.io.IOException; import java.util.Arrays; /** * @Description: * @Author: Yourheart * @Create: 2022/12/8 15:37 */ @Slf4j @Service("weixin_crawler") public class WeiXinCrawlerHandleStrategy implements CrawlerHandleStrategy { /** * 通过爬虫获取网页地址的名称 * * @param crawlerDTO * @return */ @Override public CrawlerDTO getCrawlerDto(CrawlerDTO crawlerDTO) { log.info("爬虫微信的地址..."); String url = crawlerDTO.getUrl(); try { Document doc = Jsoup.connect(url).get(); Elements select = doc.select("meta[property=twitter:title]"); StringBuilder stringBuilder=new StringBuilder(); for (Element element : select) { String string = element.toString(); string = string.replace("<", ""); string = string.replace(">", ""); string = string.replace("\"", ""); String[] split = string.split("="); Arrays.stream(split).forEach(a->{ log.info("a:{}",a); }); stringBuilder.append(split[split.length - 1]); } } catch (IOException e) { log.error("【微信爬虫失败】:{}",e); } return null; } }
标签:ip,模式,开闭,满足,springframework,org,import,com,CrawlerDTO From: https://www.cnblogs.com/q202105271618/p/16967036.html