cgLib动态代理

Author: enjoyCoding666

.idea/workspace.xml

@@ -1,15 +1,2 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
-    <output url="file://$MODULE_DIR$/target/classes" />
-    <output-test url="file://$MODULE_DIR$/target/test-classes" />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
-      <excludeFolder url="file://$MODULE_DIR$/target" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4" />

DesignPatternsDemo.iml

@@ -8,8 +8,25 @@
     <artifactId>java</artifactId>
     <version>1.0-SNAPSHOT</version>
     <dependencies>
+        <dependency>
+            <groupId>cglib</groupId>
+            <artifactId>cglib</artifactId>
+            <version>2.2.2</version>
+        </dependency>
 
     </dependencies>
 
-
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>2.3.2</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 </project>

pom.xml

@@ -0,0 +1,40 @@
+package proxy.cgLibProxy;
+
+import net.sf.cglib.proxy.Enhancer;
+import net.sf.cglib.proxy.MethodInterceptor;
+import net.sf.cglib.proxy.MethodProxy;
+
+import java.lang.reflect.Method;
+
+public class CgLibProxyExample implements MethodInterceptor {
+    /**
+     * 生成cgLib代理对象
+     * @param cls
+     * @return
+     */
+   public  Object getProxy(Class cls) {
+       Enhancer enhancer=new Enhancer();
+       //设置增强类型
+       enhancer.setSuperclass(cls);
+       //定义代理逻辑对象为当前对象。要求当前对象实现MethodInterceptor接口。
+       enhancer.setCallback(this);
+       //生成并返回代理对象
+       return  enhancer.create();
+   }
+
+    /**
+     * 代理逻辑方法。
+     * @param o
+     * @param method
+     * @param args
+     * @param methodProxy
+     * @return
+     * @throws Throwable
+     */
+    public Object intercept(Object o, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
+        System.out.println("调用真实对象前。");
+        Object result=methodProxy.invokeSuper(o,args);
+        System.out.println("调用真实对象后。");
+        return result;
+    }
+}

src/main/java/proxy/cgLibProxy/CgLibProxyExample.java

@@ -0,0 +1,9 @@
+package proxy.cgLibProxy;
+
+public class CgLibTest {
+    public static void main(String[] args) {
+          CgLibProxyExample cgLibProxyExample=new CgLibProxyExample();
+          Order order=(Order) cgLibProxyExample.getProxy(Order.class);
+          order.getOrder();
+    }
+}

src/main/java/proxy/cgLibProxy/CgLibTest.java

@@ -0,0 +1,7 @@
+package proxy.cgLibProxy;
+
+public class Order {
+    public  void getOrder() {
+        System.out.println("成功获取Order");
+    }
+}

src/main/java/proxy/cgLibProxy/Order.java

@@ -28,7 +28,7 @@ public Object getProxyObject(Object target) {
     public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
         System.out.println("进入代理逻辑方法。");
         System.out.println("在调度真实对象之前的逻辑");
-        Object object=method.invoke(target,args);
+        Object object=method.invoke(target,args);       //通过反射进行方法的调用
         System.out.println("在调度真实对象之后的逻辑");
         return object;
     }