小傅哥 | 重学 Java 设计模式：实战装饰器模式(SSO单点登录功能扩展，增加拦截用户访问方法范围场景)

README.md

@@ -12,4 +12,5 @@
 
 - [1. 重学 Java 设计模式：适配器模式(多样MQ消息抽取需要数据)](https://bugstack.cn/itstack-demo-design/2020/06/02/%E9%87%8D%E5%AD%A6-Java-%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F-%E9%80%82%E9%85%8D%E5%99%A8%E6%A8%A1%E5%BC%8F.html)
 - [2. 重学 Java 设计模式：实战桥接模式(多支付渠道「微信、支付宝」与多支付模式「刷脸、指纹」场景)](https://bugstack.cn/itstack-demo-design/2020/06/04/%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%A1%A5%E6%8E%A5%E6%A8%A1%E5%BC%8F.html)
-- [3. 重学 Java 设计模式：实战组合模式(营销差异化人群发券，决策树引擎搭建场景)](https://bugstack.cn/itstack-demo-design/2020/06/08/%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%BB%84%E5%90%88%E6%A8%A1%E5%BC%8F.html)
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+- [3. 重学 Java 设计模式：实战组合模式(营销差异化人群发券，决策树引擎搭建场景)](https://bugstack.cn/itstack-demo-design/2020/06/08/%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%BB%84%E5%90%88%E6%A8%A1%E5%BC%8F.html)
+- [4. 重学 Java 设计模式：实战装饰器模式(SSO单点登录功能扩展，增加拦截用户访问方法范围场景)](https://bugstack.cn/itstack-demo-design/2020/06/09/%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%A3%85%E9%A5%B0%E5%99%A8%E6%A8%A1%E5%BC%8F.html)
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itstack-demo-design-9-00/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-9-00</artifactId>
+
+
+</project>
\ No newline at end of file

itstack-demo-design-9-00/src/main/java/org/itstack/demo/design/HandlerInterceptor.java

+package org.itstack.demo.design;
+
+public interface HandlerInterceptor {
+
+    boolean preHandle(String request, String response, Object handler);
+
+}

itstack-demo-design-9-00/src/main/java/org/itstack/demo/design/SsoInterceptor.java

+package org.itstack.demo.design;
+
+public class SsoInterceptor implements HandlerInterceptor{
+
+    public boolean preHandle(String request, String response, Object handler) {
+        // 模拟获取cookie
+        String ticket = request.substring(1, 8);
+        // 模拟校验
+        return ticket.equals("success");
+    }
+
+}

itstack-demo-design-9-00/src/test/java/org/itstack/demo/design/test/ApiTest.java

+package org.itstack.demo.design.test;
+
+import org.itstack.demo.design.SsoInterceptor;
+import org.junit.Test;
+
+public class ApiTest {
+
+    @Test
+    public void test_sso() {
+        SsoInterceptor ssoInterceptor = new SsoInterceptor();
+        String request = "1successhuahua";
+        boolean success = ssoInterceptor.preHandle(request, "ewcdqwt40liuiu", "t");
+        System.out.println("登录校验：" + request +(success ? " 放行" : " 拦截"));
+    }
+
+}

itstack-demo-design-9-01/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-9-01</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>org.itstack</groupId>
+            <artifactId>itstack-demo-design-9-00</artifactId>
+            <version>1.0-SNAPSHOT</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+
+</project>
\ No newline at end of file

itstack-demo-design-9-01/src/main/java/org/itstack/demo/design/LoginSsoDecorator.java

+package org.itstack.demo.design;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class LoginSsoDecorator extends SsoInterceptor {
+
+    private static Map<String, String> authMap = new ConcurrentHashMap<String, String>();
+
+    static {
+        authMap.put("huahua", "queryUserInfo");
+        authMap.put("doudou", "queryUserInfo");
+    }
+
+    @Override
+    public boolean preHandle(String request, String response, Object handler) {
+
+        // 模拟获取cookie
+        String ticket = request.substring(1, 8);
+        // 模拟校验
+        boolean success = ticket.equals("success");
+
+        if (!success) return false;
+
+        String userId = request.substring(9);
+        String method = authMap.get(userId);
+
+        // 模拟方法校验
+        return "queryUserInfo".equals(method);
+    }
+
+}

itstack-demo-design-9-01/src/test/java/org/itstack/demo/design/test/ApiTest.java

+package org.itstack.demo.design.test;
+
+import org.itstack.demo.design.LoginSsoDecorator;
+import org.junit.Test;
+
+public class ApiTest {
+
+    @Test
+    public void test_LoginSsoDecorator() {
+        LoginSsoDecorator ssoDecorator = new LoginSsoDecorator();
+        String request = "1successhuahua";
+        boolean success = ssoDecorator.preHandle(request, "ewcdqwt40liuiu", "t");
+        System.out.println("登录校验：" + request + (success ? " 放行" : " 拦截"));
+    }
+
+}

itstack-demo-design-9-02/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-9-02</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>org.itstack</groupId>
+            <artifactId>itstack-demo-design-9-00</artifactId>
+            <version>1.0-SNAPSHOT</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+
+</project>
\ No newline at end of file

itstack-demo-design-9-02/src/main/java/org/itstack/demo/design/LoginSsoDecorator.java

+package org.itstack.demo.design;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class LoginSsoDecorator extends SsoDecorator {
+
+    private Logger logger = LoggerFactory.getLogger(LoginSsoDecorator.class);
+
+    private static Map<String, String> authMap = new ConcurrentHashMap<String, String>();
+
+    static {
+        authMap.put("huahua", "queryUserInfo");
+        authMap.put("doudou", "queryUserInfo");
+    }
+
+    public LoginSsoDecorator(HandlerInterceptor handlerInterceptor) {
+        super(handlerInterceptor);
+    }
+
+    @Override
+    public boolean preHandle(String request, String response, Object handler) {
+        boolean success = super.preHandle(request, response, handler);
+        if (!success) return false;
+        String userId = request.substring(8);
+        String method = authMap.get(userId);
+        logger.info("模拟单点登录方法访问拦截校验：{} {}", userId, method);
+        // 模拟方法校验
+        return "queryUserInfo".equals(method);
+    }
+}

itstack-demo-design-9-02/src/main/java/org/itstack/demo/design/SsoDecorator.java

+package org.itstack.demo.design;
+
+public abstract class SsoDecorator implements HandlerInterceptor {
+
+    private HandlerInterceptor handlerInterceptor;
+
+    private SsoDecorator(){}
+
+    public SsoDecorator(HandlerInterceptor handlerInterceptor) {
+        this.handlerInterceptor = handlerInterceptor;
+    }
+
+    public boolean preHandle(String request, String response, Object handler) {
+        return handlerInterceptor.preHandle(request, response, handler);
+    }
+
+}

itstack-demo-design-9-02/src/test/java/org/itstack/demo/design/test/ApiTest.java

+package org.itstack.demo.design.test;
+
+import org.itstack.demo.design.LoginSsoDecorator;
+import org.itstack.demo.design.SsoInterceptor;
+import org.junit.Test;
+
+public class ApiTest {
+
+    @Test
+    public void test_LoginSsoDecorator() {
+        LoginSsoDecorator ssoDecorator = new LoginSsoDecorator(new SsoInterceptor());
+        String request = "1successhuahua";
+        boolean success = ssoDecorator.preHandle(request, "ewcdqwt40liuiu", "t");
+        System.out.println("登录校验：" + request + (success ? " 放行" : " 拦截"));
+    }
+
+}

pom.xml

@@ -30,6 +30,9 @@
         <module>itstack-demo-design-7-02</module>
         <module>itstack-demo-design-8-01</module>
         <module>itstack-demo-design-8-02</module>
+        <module>itstack-demo-design-9-00</module>
+        <module>itstack-demo-design-9-01</module>
+        <module>itstack-demo-design-9-02</module>
     </modules>
 
     <dependencies>