From 58f9bf22a02f973a8a6864038efdd5ea66988d22 Mon Sep 17 00:00:00 2001 From: maxy19 <315802767@qq.com> Date: Sun, 15 Dec 2019 16:23:59 +0800 Subject: [PATCH] =?UTF-8?q?fix:=E4=BF=AE=E6=94=B9=E6=95=B4=E4=BD=93?= =?UTF-8?q?=E5=8A=A8=E6=80=81=E4=BB=A3=E7=90=86=E4=BB=A3=E7=A0=81?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- src/main/com/mxy/design/proxy/SchoolImpl.java | 3 +- ...StudentCglibProxy.java => CglibProxy.java} | 9 ++- .../dynamic/cglib/proxy/StudentService.java | 5 +- .../cglib/proxy/StudentServiceExtend.java | 5 +- .../proxy/StudentServiceExtendChildren.java | 6 +- .../dynamic/cglib/proxy/TeacherService.java | 19 +++++++ .../{SchoolJdkProxy.java => JdkProxy.java} | 14 ++--- .../proxy/dynamic/jdk/proxy/SchoolImpl.java | 25 ++++++++ .../mxy/design/proxy/DynamicProxyTest.java | 57 ++++++------------- 9 files changed, 86 insertions(+), 57 deletions(-) rename src/main/com/mxy/design/proxy/dynamic/cglib/proxy/{StudentCglibProxy.java => CglibProxy.java} (72%) create mode 100644 src/main/com/mxy/design/proxy/dynamic/cglib/proxy/TeacherService.java rename src/main/com/mxy/design/proxy/dynamic/jdk/proxy/{SchoolJdkProxy.java => JdkProxy.java} (62%) create mode 100644 src/main/com/mxy/design/proxy/dynamic/jdk/proxy/SchoolImpl.java diff --git a/src/main/com/mxy/design/proxy/SchoolImpl.java b/src/main/com/mxy/design/proxy/SchoolImpl.java index 721c538..415ef8c 100644 --- a/src/main/com/mxy/design/proxy/SchoolImpl.java +++ b/src/main/com/mxy/design/proxy/SchoolImpl.java @@ -3,9 +3,8 @@ public class SchoolImpl implements ISchool { public SchoolImpl(){ - //JDK动态代理通过反射会调用这个方法 - System.out.println(SchoolImpl.class+":JDK 动态代理反射调用。"); } + @Override public void save() { System.out.println("保存学校信息ing"); diff --git a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentCglibProxy.java b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/CglibProxy.java similarity index 72% rename from src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentCglibProxy.java rename to src/main/com/mxy/design/proxy/dynamic/cglib/proxy/CglibProxy.java index 51da3d0..3c799d8 100644 --- a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentCglibProxy.java +++ b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/CglibProxy.java @@ -9,11 +9,11 @@ /** * 动态代理 实现GGLIB 接口 * 注意： - * CGLIB是针对类实现代理，主要是对指定的类生成一个子类，覆盖其中的方法， + * CGLIB是针对类实现代理，主要是对指定的类生成一个子类， * 并覆盖其中方法实现增强，但是因为采用的是继承，所以该类或方法最好不要声明成final， * 对于final类或方法，是无法继承的。 */ -public class StudentCglibProxy implements MethodInterceptor { +public class CglibProxy implements MethodInterceptor { /** * CGLib需要代理的目标对象 */ @@ -24,7 +24,10 @@ public Object intercept(Object obj, Method method, Object[] args, MethodProxy me //可能造成死循环坑：而如果调用invokeSuper方法，则一定要使用被代理后的obj对象 //return methodProxy.invokeSuper(obj, args); //可能造成死循环坑：如果是用invoke方法一定要使用被代理的对象也就是上文中的target - return methodProxy.invoke(target, args); + System.out.println("被代理对象:" + target.getClass() + ":调用方法:" + method.getName() + ":前置通知:开启事务"); + Object invoke = methodProxy.invoke(target, args); + System.out.println("被代理对象:" + target.getClass() + ":调用方法:" + method.getName() + ":后置通知:提交事务"); + return invoke; } public T getInstance(Object target) { diff --git a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentService.java b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentService.java index 2af2074..09fc31c 100644 --- a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentService.java +++ b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentService.java @@ -4,10 +4,11 @@ public class StudentService { public StudentService() { //CGLIB动态代理通过反射会调用这个方法 - System.out.println("基类==> CGLIB 动态代理反射调用。"); + System.out.println("studentService===>基类类构造方法"); } + public StudentService(String str) { - //避免混淆 + //避免与当通过代理初始化对象空构造时候打印内容混淆 } public void save() { diff --git a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtend.java b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtend.java index b4ea74c..a511b7a 100644 --- a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtend.java +++ b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtend.java @@ -3,7 +3,10 @@ public class StudentServiceExtend extends StudentService { public StudentServiceExtend() { - System.out.println("===>扩展类构造方法"); + System.out.println("studentServiceExtend===>扩展类构造方法"); + } + + public StudentServiceExtend(String str) { } @Override diff --git a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtendChildren.java b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtendChildren.java index 36c86b8..c2b9e9a 100644 --- a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtendChildren.java +++ b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/StudentServiceExtendChildren.java @@ -3,7 +3,11 @@ public class StudentServiceExtendChildren extends StudentServiceExtend { public StudentServiceExtendChildren() { - System.out.println("===>扩展类子类构造方法"); + System.out.println("studentServiceExtendChildren===>扩展类子类构造方法"); + } + + public StudentServiceExtendChildren(String str) { + //避免与当通过代理初始化对象空构造时候打印内容混淆 } @Override diff --git a/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/TeacherService.java b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/TeacherService.java new file mode 100644 index 0000000..ecac348 --- /dev/null +++ b/src/main/com/mxy/design/proxy/dynamic/cglib/proxy/TeacherService.java @@ -0,0 +1,19 @@ +package com.mxy.design.proxy.dynamic.cglib.proxy; + +public class TeacherService { + + public TeacherService() { + System.out.println("teacherService===>基类类构造方法"); + } + public TeacherService(String str) { + //避免与当通过代理初始化对象空构造时候打印内容混淆 + } + + public void save() { + System.out.println("保存ing"); + } + + public void delete() { + System.out.println("删除ing"); + } +} diff --git a/src/main/com/mxy/design/proxy/dynamic/jdk/proxy/SchoolJdkProxy.java b/src/main/com/mxy/design/proxy/dynamic/jdk/proxy/JdkProxy.java similarity index 62% rename from src/main/com/mxy/design/proxy/dynamic/jdk/proxy/SchoolJdkProxy.java rename to src/main/com/mxy/design/proxy/dynamic/jdk/proxy/JdkProxy.java index 183b0f5..1734fdb 100644 --- a/src/main/com/mxy/design/proxy/dynamic/jdk/proxy/SchoolJdkProxy.java +++ b/src/main/com/mxy/design/proxy/dynamic/jdk/proxy/JdkProxy.java @@ -11,20 +11,20 @@ * 1.当Bean实现接口时，Spring就会用JDK的动态代理。 * 2.当Bean没有实现接口时，Spring使用CGlib是实现。 */ -public class SchoolJdkProxy implements InvocationHandler { +public class JdkProxy implements InvocationHandler { private Object target; - public SchoolJdkProxy(Object object) { - this.target = object; - } - - public T getInstance() { + public T getInstance(Object target) { + this.target = target; return (T) Proxy.newProxyInstance(target.getClass().getClassLoader(), target.getClass().getInterfaces(), this); } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { - return method.invoke(target, args); + System.out.println("被代理对象:" + target.getClass() + ":调用方法:" + method.getName() + ":前置通知:开启事务"); + Object invoke = method.invoke(target, args); + System.out.println("被代理对象:" + target.getClass() + ":调用方法:" + method.getName() + ":后置通知:提交事务"); + return invoke; } } diff --git a/src/main/com/mxy/design/proxy/dynamic/jdk/proxy/SchoolImpl.java b/src/main/com/mxy/design/proxy/dynamic/jdk/proxy/SchoolImpl.java new file mode 100644 index 0000000..b0adc1d --- /dev/null +++ b/src/main/com/mxy/design/proxy/dynamic/jdk/proxy/SchoolImpl.java @@ -0,0 +1,25 @@ +package com.mxy.design.proxy.dynamic.jdk.proxy; + +import com.mxy.design.proxy.ISchool; + +public class SchoolImpl implements ISchool { + + public SchoolImpl(){ + //JDK动态代理通过反射会调用这个方法 + System.out.println(SchoolImpl.class+":JDK 动态代理反射调用。"); + } + + public SchoolImpl(String str) { + //避免与当通过代理初始化对象空构造时候打印内容混淆 + } + + @Override + public void save() { + System.out.println("保存学校信息ing"); + } + + @Override + public void delete() { + System.out.println("删除学校信息ing"); + } +} diff --git a/src/test/com/mxy/design/proxy/DynamicProxyTest.java b/src/test/com/mxy/design/proxy/DynamicProxyTest.java index 1347c6b..17c7748 100644 --- a/src/test/com/mxy/design/proxy/DynamicProxyTest.java +++ b/src/test/com/mxy/design/proxy/DynamicProxyTest.java @@ -1,12 +1,14 @@ package com.mxy.design.proxy; -import com.mxy.design.proxy.dynamic.cglib.proxy.StudentCglibProxy; +import com.mxy.design.proxy.dynamic.cglib.proxy.CglibProxy; import com.mxy.design.proxy.dynamic.cglib.proxy.StudentService; import com.mxy.design.proxy.dynamic.cglib.proxy.StudentServiceExtendChildren; -import com.mxy.design.proxy.dynamic.jdk.proxy.SchoolJdkProxy; +import com.mxy.design.proxy.dynamic.cglib.proxy.TeacherService; +import com.mxy.design.proxy.dynamic.jdk.proxy.JdkProxy; +import com.mxy.design.proxy.dynamic.jdk.proxy.SchoolImpl; import org.junit.Test; -import java.util.Random; +import java.io.IOException; /** * 装饰模式:增加功能,不改变接口 @@ -21,55 +23,28 @@ public class DynamicProxyTest { @Test - public void cglibProxyTest() { + public void cglibProxyTest() throws IOException { System.out.println("=====使用CGLIB代理模式"); //去掉下面注释可以 会在指定位置生成文件 //System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, ".\\\\classes"); - StudentService cglibProxy = new StudentCglibProxy().getInstance(new StudentServiceExtendChildren()); - save(cglibProxy); - delete(cglibProxy); + TeacherService teacherService = new CglibProxy().getInstance(new TeacherService("")); + teacherService.save(); + + System.out.println(); + + StudentService studentService = new CglibProxy().getInstance(new StudentServiceExtendChildren("")); + studentService.delete(); } @Test public void jdkProxyTest() { System.out.println("=====使用JDK动态代理模式"); - ISchool jdkProxy = new SchoolJdkProxy(new SchoolImpl()).getInstance(); - //与静态代理输出结果保持一致 - save(jdkProxy); - //查询是否存在 - delete(jdkProxy); - } - - private void delete(ISchool jdkProxy) { - if (new Random().nextBoolean()) { - System.out.println("===开启事务"); - jdkProxy.delete(); - System.out.println("===提交事务"); - } else { - System.out.println("===该用户已经被删除"); - } - } + ISchool jdkProxy = new JdkProxy().getInstance(new SchoolImpl("")); - private void save(ISchool jdkProxy) { - System.out.println("==开启事务"); jdkProxy.save(); - System.out.println("==提交事务"); - } - public void save(StudentService cglibProxy) { - System.out.println("==开启事务"); - cglibProxy.save(); - System.out.println("==提交事务"); - } + System.out.println(); - public void delete(StudentService cglibProxy) { - if (new Random().nextBoolean()) { - System.out.println("===开启事务"); - cglibProxy.delete(); - System.out.println("===提交事务"); - } else { - System.out.println("===该用户已经被删除"); - } + jdkProxy.delete(); } - }