小傅哥 | 重学 Java 设计模式：实战模版模式「模拟爬虫各类电商商品，生成营销推广海报场景」

.gitignore

@@ -35,3 +35,4 @@
 /itstack-demo-design-19-01/itstack-demo-design-19-01.iml
 /itstack-demo-design-19-00/itstack-demo-design-19-00.iml
 /itstack-demo-design-20-01/itstack-demo-design-20-01.iml
+/itstack-demo-design-21-00/itstack-demo-design-21-00.iml

README.md

@@ -27,4 +27,5 @@
 - [`5. 重学 Java 设计模式：实战备忘录模式「模拟互联网系统上线过程中，配置文件回滚场景」`](https://bugstack.cn/itstack-demo-design/2020/06/28/%E9%87%8D%E5%AD%A6-Java-%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F-%E5%AE%9E%E6%88%98%E5%A4%87%E5%BF%98%E5%BD%95%E6%A8%A1%E5%BC%8F.html)
 - [`6. 重学 Java 设计模式：实战观察者模式「模拟类似小客车指标摇号过程，监听消息通知用户中签场景」`](https://bugstack.cn/itstack-demo-design/2020/06/30/%E9%87%8D%E5%AD%A6-Java-%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F-%E5%AE%9E%E6%88%98%E8%A7%82%E5%AF%9F%E8%80%85%E6%A8%A1%E5%BC%8F.html)
 - [`7. 重学 Java 设计模式：实战状态模式「模拟系统营销活动，状态流程审核发布上线场景」`](https://bugstack.cn/itstack-demo-design/2020/07/02/%E9%87%8D%E5%AD%A6-Java-%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F-%E5%AE%9E%E6%88%98%E7%8A%B6%E6%80%81%E6%A8%A1%E5%BC%8F.html)
-- [`8. 重学 Java 设计模式：实战策略模式「模拟多种营销类型优惠券，折扣金额计算策略场景」`](https://bugstack.cn/itstack-demo-design/2020/07/05/%E9%87%8D%E5%AD%A6-Java-%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F-%E5%AE%9E%E6%88%98%E7%AD%96%E7%95%A5%E6%A8%A1%E5%BC%8F.html)
\ No newline at end of file
+- [`8. 重学 Java 设计模式：实战策略模式「模拟多种营销类型优惠券，折扣金额计算策略场景」`](https://bugstack.cn/itstack-demo-design/2020/07/05/%E9%87%8D%E5%AD%A6-Java-%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F-%E5%AE%9E%E6%88%98%E7%AD%96%E7%95%A5%E6%A8%A1%E5%BC%8F.html)
+- [`9. 重学 Java 设计模式：实战模版模式「模拟爬虫各类电商商品，生成营销推广海报场景」`](https://bugstack.cn/itstack-demo-design/2020/07/07/%E9%87%8D%E5%AD%A6-Java-%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F-%E5%AE%9E%E6%88%98%E6%A8%A1%E6%9D%BF%E6%A8%A1%E5%BC%8F.html)
\ No newline at end of file

itstack-demo-design-21-00/pom.xml

+<?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">
+    <parent>
+        <artifactId>itstack-demo-design</artifactId>
+        <groupId>org.itstack</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>itstack-demo-design-21-00</artifactId>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>
\ No newline at end of file

itstack-demo-design-21-00/src/main/java/org/itstack/demo/design/HttpClient.java

+package org.itstack.demo.design;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+public class HttpClient {
+
+    public static String doGet(String httpurl) {
+        HttpURLConnection connection = null;
+        InputStream is = null;
+        BufferedReader br = null;
+        String result = null;// 返回结果字符串
+        try {
+            // 创建远程url连接对象
+            URL url = new URL(httpurl);
+            // 通过远程url连接对象打开一个连接，强转成httpURLConnection类
+            connection = (HttpURLConnection) url.openConnection();
+            // 设置连接方式：get
+            connection.setRequestMethod("GET");
+            // 设置连接主机服务器的超时时间：15000毫秒
+            connection.setConnectTimeout(15000);
+            // 设置读取远程返回的数据时间：60000毫秒
+            connection.setReadTimeout(60000);
+            // 发送请求
+            connection.connect();
+            // 通过connection连接，获取输入流
+            if (connection.getResponseCode() == 200) {
+                is = connection.getInputStream();
+                // 封装输入流is，并指定字符集
+                br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+                // 存放数据
+                StringBuilder sbf = new StringBuilder();
+                String temp = null;
+                while ((temp = br.readLine()) != null) {
+                    sbf.append(temp);
+                    sbf.append("\r\n");
+                }
+                result = sbf.toString();
+            }
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            // 关闭资源
+            if (null != br) {
+                try {
+                    br.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+
+            if (null != is) {
+                try {
+                    is.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+
+            assert connection != null;
+            connection.disconnect();// 关闭远程连接
+        }
+
+        return result;
+    }
+
+}

itstack-demo-design-21-00/src/main/java/org/itstack/demo/design/NetMall.java

+package org.itstack.demo.design;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+
+/**
+ * 基础电商推广服务
+ * 1. 生成最优价商品海报
+ * 2. 海报含带推广邀请码
+ */
+public abstract class NetMall {
+
+    protected Logger logger = LoggerFactory.getLogger(NetMall.class);
+
+    String uId;   // 用户ID
+    String uPwd;  // 用户密码
+
+    public NetMall(String uId, String uPwd) {
+        this.uId = uId;
+        this.uPwd = uPwd;
+    }
+
+    /**
+     * 生成商品推广海报
+     *
+     * @param skuUrl 商品地址(京东、淘宝、当当)
+     * @return 海报图片base64位信息
+     */
+    public String generateGoodsPoster(String skuUrl) {
+        if (!login(uId, uPwd)) return null;             // 1. 验证登录
+        Map<String, String> reptile = reptile(skuUrl);  // 2. 爬虫商品
+        return createBase64(reptile);                   // 3. 组装海报
+    }
+
+    // 模拟登录
+    protected abstract Boolean login(String uId, String uPwd);
+
+    // 爬虫提取商品信息(登录后的优惠价格)
+    protected abstract Map<String, String> reptile(String skuUrl);
+
+    // 生成商品海报信息
+    protected abstract String createBase64(Map<String, String> goodsInfo);
+
+}

itstack-demo-design-21-00/src/main/java/org/itstack/demo/design/impl/DangDangNetMall.java

+package org.itstack.demo.design.impl;
+
+import com.alibaba.fastjson.JSON;
+import org.itstack.demo.design.HttpClient;
+import org.itstack.demo.design.NetMall;
+import sun.misc.BASE64Encoder;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class DangDangNetMall extends NetMall {
+
+    public DangDangNetMall(String uId, String uPwd) {
+        super(uId, uPwd);
+    }
+
+    @Override
+    public Boolean login(String uId, String uPwd) {
+        logger.info("模拟当当用户登录 uId：{} uPwd：{}", uId, uPwd);
+        return true;
+    }
+
+    @Override
+    public Map<String, String> reptile(String skuUrl) {
+        String str = HttpClient.doGet(skuUrl);
+        Pattern p9 = Pattern.compile("(?<=title\\>).*(?=</title)");
+        Matcher m9 = p9.matcher(str);
+        Map<String, String> map = new ConcurrentHashMap<String, String>();
+        if (m9.find()) {
+            map.put("name", m9.group());
+        }
+        map.put("price", "4548.00");
+        logger.info("模拟当当商品爬虫解析：{} | {} 元 {}", map.get("name"), map.get("price"), skuUrl);
+        return map;
+    }
+
+    @Override
+    public String createBase64(Map<String, String> goodsInfo) {
+        BASE64Encoder encoder = new BASE64Encoder();
+        logger.info("模拟生成当当商品base64海报");
+        return encoder.encode(JSON.toJSONString(goodsInfo).getBytes());
+    }
+
+}

itstack-demo-design-21-00/src/main/java/org/itstack/demo/design/impl/JDNetMall.java

+package org.itstack.demo.design.impl;
+
+import com.alibaba.fastjson.JSON;
+import org.itstack.demo.design.HttpClient;
+import org.itstack.demo.design.NetMall;
+import sun.misc.BASE64Encoder;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * 模拟JD商城
+ */
+public class JDNetMall extends NetMall {
+
+    public JDNetMall(String uId, String uPwd) {
+        super(uId, uPwd);
+    }
+
+    public Boolean login(String uId, String uPwd) {
+        logger.info("模拟京东用户登录 uId：{} uPwd：{}", uId, uPwd);
+        return true;
+    }
+
+    public Map<String, String> reptile(String skuUrl) {
+        String str = HttpClient.doGet(skuUrl);
+        Pattern p9 = Pattern.compile("(?<=title\\>).*(?=</title)");
+        Matcher m9 = p9.matcher(str);
+        Map<String, String> map = new ConcurrentHashMap<String, String>();
+        if (m9.find()) {
+            map.put("name", m9.group());
+        }
+        map.put("price", "5999.00");
+        logger.info("模拟京东商品爬虫解析：{} | {} 元 {}", map.get("name"), map.get("price"), skuUrl);
+        return map;
+    }
+
+    public String createBase64(Map<String, String> goodsInfo) {
+        BASE64Encoder encoder = new BASE64Encoder();
+        logger.info("模拟生成京东商品base64海报");
+        return encoder.encode(JSON.toJSONString(goodsInfo).getBytes());
+    }
+
+}

itstack-demo-design-21-00/src/main/java/org/itstack/demo/design/impl/TaoBaoNetMall.java

+package org.itstack.demo.design.impl;
+
+import com.alibaba.fastjson.JSON;
+import org.itstack.demo.design.HttpClient;
+import org.itstack.demo.design.NetMall;
+import sun.misc.BASE64Encoder;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class TaoBaoNetMall extends NetMall {
+
+    public TaoBaoNetMall(String uId, String uPwd) {
+        super(uId, uPwd);
+    }
+
+    @Override
+    public Boolean login(String uId, String uPwd) {
+        logger.info("模拟淘宝用户登录 uId：{} uPwd：{}", uId, uPwd);
+        return true;
+    }
+
+    @Override
+    public Map<String, String> reptile(String skuUrl) {
+        String str = HttpClient.doGet(skuUrl);
+        Pattern p9 = Pattern.compile("(?<=title\\>).*(?=</title)");
+        Matcher m9 = p9.matcher(str);
+        Map<String, String> map = new ConcurrentHashMap<String, String>();
+        if (m9.find()) {
+            map.put("name", m9.group());
+        }
+        map.put("price", "4799.00");
+        logger.info("模拟淘宝商品爬虫解析：{} | {} 元 {}", map.get("name"), map.get("price"), skuUrl);
+        return map;
+    }
+
+    @Override
+    public String createBase64(Map<String, String> goodsInfo) {
+        BASE64Encoder encoder = new BASE64Encoder();
+        logger.info("模拟生成淘宝商品base64海报");
+        return encoder.encode(JSON.toJSONString(goodsInfo).getBytes());
+    }
+
+}

itstack-demo-design-21-00/src/test/java/org/itstack/demo/design/test/ApiTest.java

+package org.itstack.demo.design.test;
+
+import org.itstack.demo.design.NetMall;
+import org.itstack.demo.design.impl.JDNetMall;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ApiTest {
+
+    public Logger logger = LoggerFactory.getLogger(ApiTest.class);
+
+    /**
+     * 测试链接
+     * 京东；https://item.jd.com/100008348542.html
+     * 淘宝；https://detail.tmall.com/item.htm
+     * 当当；http://product.dangdang.com/1509704171.html
+     */
+    @Test
+    public void test_NetMall() {
+        NetMall netMall = new JDNetMall("1000001","*******");
+        String base64 = netMall.generateGoodsPoster("https://item.jd.com/100008348542.html");
+        logger.info("测试结果：{}", base64);
+    }
+
+}

pom.xml

@@ -57,6 +57,7 @@
         <module>itstack-demo-design-19-02</module>
         <module>itstack-demo-design-20-01</module>
         <module>itstack-demo-design-20-02</module>
+        <module>itstack-demo-design-21-00</module>
     </modules>
 
     <dependencies>