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看过马士兵动态代理视频的朋友请进,该怎么处理

热度:9597   发布时间:2013-02-25 21:22:20.0
看过马士兵动态代理视频的朋友请进
我用了下他的那段代码,但是在通过jdk6的complier进行编译后,动态生成的java类和class不会马上出现,这时clent段就会报Exception in thread "main" java.lang.ClassNotFoundException: com.bjsxt.proxy.$Proxy1

具体代码如下:

Java code
package com.bjsxt.proxy;import java.io.File;import java.io.FileWriter;import java.lang.reflect.Constructor;import java.lang.reflect.Method;import java.net.URL;import java.net.URLClassLoader;import javax.tools.JavaCompiler;import javax.tools.StandardJavaFileManager;import javax.tools.ToolProvider;import javax.tools.JavaCompiler.CompilationTask;public class Proxy {    public static Object newProxyInstance(Class infce, InvocationHandler h) throws Exception { //JDK6 Complier API, CGLib, ASM        String methodStr = "";        String rt = "\r\n";                Method[] methods = infce.getMethods();        /*        for(Method m : methods) {            methodStr += "@Override" + rt +                          "public void " + m.getName() + "() {" + rt +                             "   long start = System.currentTimeMillis();" + rt +                            "   System.out.println(\"starttime:\" + start);" + rt +                            "   t." + m.getName() + "();" + rt +                            "   long end = System.currentTimeMillis();" + rt +                            "   System.out.println(\"time:\" + (end-start));" + rt +                         "}";        }        */        for(Method m : methods) {            methodStr += "@Override" + rt +                          "public void " + m.getName() + "() {" + rt +                         "    try {" + rt +                         "    Method md = " + infce.getName() + ".class.getMethod(\"" + m.getName() + "\");" + rt +                         "    h.invoke(this, md);" + rt +                         "    }catch(Exception e) {e.printStackTrace();}" + rt +                                                 "}";        }                String src =             "package com.bjsxt.proxy;" +  rt +            "import java.lang.reflect.Method;" + rt +            "public class $Proxy1 implements " + infce.getName() + "{" + rt +            "    public $Proxy1(InvocationHandler h) {" + rt +            "        this.h = h;" + rt +            "    }" + rt +                                    "    com.bjsxt.proxy.InvocationHandler h;" + rt +                                        methodStr +            "}";        String fileName =             "src/com/bjsxt/proxy/$Proxy1.java";        File f = new File(fileName);        FileWriter fw = new FileWriter(f);        fw.write(src);        fw.flush();        fw.close();                //compile        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();        StandardJavaFileManager fileMgr = compiler.getStandardFileManager(null, null, null);        Iterable units = fileMgr.getJavaFileObjects(fileName);        CompilationTask t = compiler.getTask(null, fileMgr, null, null, null, units);        t.call();        fileMgr.close();                //load into memory and create an instance        URL[] urls = new URL[] {new URL("file:/" + "src/")};        URLClassLoader ul = new URLClassLoader(urls);        Class c = ul.loadClass("com.bjsxt.proxy.$Proxy1");        System.out.println(c);                Constructor ctr = c.getConstructor(InvocationHandler.class);        Object m = ctr.newInstance(h);        //m.move();        return m;    }}

需要解决的办法是必须要把目录下的包重新手动刷新一下再运行才可以,请问是不是需要在MyEclipse中作什么设置才行,另外上面的代码是不是实现的结果就是这样的?谢谢
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