エージェントモード(二)----すべてのインタフェースに対するすべての方法のエージェントの実装を完了する

Tank tank = new Tank() ;
Moveable tankTimeProxy = (Moveable)Proxy.newInstance(tank) ;

public class Proxy {
    public static Moveable newInstance(Moveable m) throws IOException, ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
        //        ，         
        String str =
                "package dynamicProxy ;" +
                        "public class TankTimeProxy implements Moveable {
" +
                        "    public TankTimeProxy(Moveable m) {
" +
                        "        this.m = m;
" +
                        "    }
" +
                        "
" +
                        "    private Moveable m ;
" +
                        "
" +
                "    @Override
" +
                "    public void move() throws InterruptedException {
" +
                "        long startTime = System.currentTimeMillis() ;
" +
                "        m.move();
" +
                "        long endTime = System.currentTimeMillis() ;
" +
                "        System.out.println(\"time : \" + (endTime - startTime));
" +
                "    }
" +
                "}
" ;


        //               
        // System.getProperty("user.dir")           
        String fileName = System.getProperty("user.dir") +   "/src/dynamicProxy/TankTimeProxy.java" ; 
        File file = new File(fileName) ;
        FileWriter fw = new FileWriter(file) ;
        fw.write(str);
        fw.flush();
        fw.close();
        
        //       ，          JDK6             
        JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler() ;
        //             StandardJavaFileManager    
        StandardJavaFileManager standardJavaFileManager = javaCompiler.getStandardFileManager(null,null,null)  ;
        //          
        Iterable units = standardJavaFileManager.getJavaFileObjects(fileName) ;
        //       
        JavaCompiler.CompilationTask task = javaCompiler.getTask(null,standardJavaFileManager,null,null,null,units) ;
        //       
        task.call() ;
        standardJavaFileManager.close();

        //          load            
        
        //          class     
        URL[] urls = new URL[]{new URL("file:/" + System.getProperty("user.dir") +  "/src/")} ;
        //    classLoader
        URLClassLoader ucl = new URLClassLoader(urls) ;
        //  laod     
        Class c = ucl.loadClass("dynamicProxy.TankTimeProxy") ;
        //       Moveable     
        Constructor constructor = c.getConstructor(Moveable.class) ;
        //        
        Moveable proxy = (Moveable) constructor.newInstance(new Tank());

        return proxy ;
    }
}

public static Moveable newInstance(Moveable m)

public static Object newInstance(Class inface)

Method[] methods = Method[] methods = inface.getMethods() ; 

String methodStr ="" ;
for(Method m : methods){
    methodStr +=
            "    @Override
" +
            "    public void " + m.getName() + "() {
" +
            "        try{
" +
            "            Method md = " + inface.getName() + ".class.getMethod(\""+ m.getName() +"\");
" +
            "            handler.invoke(this,md) ;
" +
            "        } catch (Exception e){
" +
            "            e.printStackTrace() ;
" +
            "        }
" +
            "    }" ;
}

String str =
        "package dynamicProxy ;
" +
        "import java.lang.reflect.Method; 
" +
        "public class TankTimeProxy implements " + inface.getName() + " {
" +
        "    public TankTimeProxy(Moveable m) {
" +
        "        this.m = m;
" +
        "    }
" +
        "
" +
        "    private " + inface.getName + " m ;
" +
        "
" +
        methodStr +
        "}
" ;

Constructor constructor = c.getConstructor(inface) ;
Object proxy =  constructor.newInstance(new Tank());