jkd动态代理源码分析
代理对象的生成方法是：
Proxy.newProxyInstance（...）,进入这个方法内部，一步一步往下走会发现会调用
ProxyGenerator.generateProxyClass（），这个方法用来生成代理类的字节码。
下面通过调用 ProxyGenerator.generateProxyClass（）方法在本地生成代理类。
1.首先要有一个接口
2.生成代理类的方法如下
3.将生成的代理类导入到idea中查看是长这样
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
import com.example.springboottest.config.OrderService;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.lang.reflect.UndeclaredThrowableException;protected static class $OrderService extends Proxy implements OrderService {private static Method m1;private static Method m3;private static Method m2;private static Method m0;public $OrderService(InvocationHandler var1) throws {super(var1);}public final boolean equals(Object var1) throws {try {return (Boolean)super.h.invoke(this, m1, new Object[]{var1});} catch (RuntimeException | Error var3) {throw var3;} catch (Throwable var4) {throw new UndeclaredThrowableException(var4);}}public final void query() throws {try {super.h.invoke(this, m3, (Object[])null);} catch (RuntimeException | Error var2) {throw var2;} catch (Throwable var3) {throw new UndeclaredThrowableException(var3);}}public final String toString() throws {try {return (String)super.h.invoke(this, m2, (Object[])null);} catch (RuntimeException | Error var2) {throw var2;} catch (Throwable var3) {throw new UndeclaredThrowableException(var3);}}public final int hashCode() throws {try {return (Integer)super.h.invoke(this, m0, (Object[])null);} catch (RuntimeException | Error var2) {throw var2;} catch (Throwable var3) {throw new UndeclaredThrowableException(var3);}}static {try {m1 = Class.forName("java.lang.Object").getMethod("equals", Class.forName("java.lang.Object"));m3 = Class.forName("com.example.springboottest.config.OrderService").getMethod("query");m2 = Class.forName("java.lang.Object").getMethod("toString");m0 = Class.forName("java.lang.Object").getMethod("hashCode");} catch (NoSuchMethodException var2) {throw new NoSuchMethodError(var2.getMessage());} catch (ClassNotFoundException var3) {throw new NoClassDefFoundError(var3.getMessage());}}
} 可以发现在代理类中的构造方法中传入了我们实现的InvocationHandler，在调用方法时会回调invoke方法。
还可以发现代理类中继承了Proxy，由于java中是单继承的，所以java动态代理是针对接口的。
转载于:.html
jkd动态代理源码分析
代理对象的生成方法是：
Proxy.newProxyInstance（...）,进入这个方法内部，一步一步往下走会发现会调用
ProxyGenerator.generateProxyClass（），这个方法用来生成代理类的字节码。
下面通过调用 ProxyGenerator.generateProxyClass（）方法在本地生成代理类。
1.首先要有一个接口
2.生成代理类的方法如下
3.将生成的代理类导入到idea中查看是长这样
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
import com.example.springboottest.config.OrderService;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.lang.reflect.UndeclaredThrowableException;protected static class $OrderService extends Proxy implements OrderService {private static Method m1;private static Method m3;private static Method m2;private static Method m0;public $OrderService(InvocationHandler var1) throws {super(var1);}public final boolean equals(Object var1) throws {try {return (Boolean)super.h.invoke(this, m1, new Object[]{var1});} catch (RuntimeException | Error var3) {throw var3;} catch (Throwable var4) {throw new UndeclaredThrowableException(var4);}}public final void query() throws {try {super.h.invoke(this, m3, (Object[])null);} catch (RuntimeException | Error var2) {throw var2;} catch (Throwable var3) {throw new UndeclaredThrowableException(var3);}}public final String toString() throws {try {return (String)super.h.invoke(this, m2, (Object[])null);} catch (RuntimeException | Error var2) {throw var2;} catch (Throwable var3) {throw new UndeclaredThrowableException(var3);}}public final int hashCode() throws {try {return (Integer)super.h.invoke(this, m0, (Object[])null);} catch (RuntimeException | Error var2) {throw var2;} catch (Throwable var3) {throw new UndeclaredThrowableException(var3);}}static {try {m1 = Class.forName("java.lang.Object").getMethod("equals", Class.forName("java.lang.Object"));m3 = Class.forName("com.example.springboottest.config.OrderService").getMethod("query");m2 = Class.forName("java.lang.Object").getMethod("toString");m0 = Class.forName("java.lang.Object").getMethod("hashCode");} catch (NoSuchMethodException var2) {throw new NoSuchMethodError(var2.getMessage());} catch (ClassNotFoundException var3) {throw new NoClassDefFoundError(var3.getMessage());}}
} 可以发现在代理类中的构造方法中传入了我们实现的InvocationHandler，在调用方法时会回调invoke方法。
还可以发现代理类中继承了Proxy，由于java中是单继承的，所以java动态代理是针对接口的。
转载于:.html
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