Java_Spring反射

package remotecall; import java.io.*; import java.net.*; import java.util.*; import java.lang.reflect.*; public class SimpleServer { private Map remoteObjects=new HashMap(); //存放远程对象的缓存 /** 把一个远程对象放到缓存中 */ public void register(String className,Object remoteObject){ remoteObjects.put( className,remoteObject); } public void service()throws Exception{ ServerSocket serverSocket = new ServerSocket(8000); System.out.println("服务器启动."); while(true){ Socket socket=serverSocket.accept(); InputStream in=socket.getInputStream(); ObjectInputStream ois=new ObjectInputStream(in); OutputStream out=socket.getOutputStream(); ObjectOutputStream oos=new ObjectOutputStream(out); Call call=(Call)ois.readObject(); //接收客户发送的Call对象 System.out.println(call); call=invoke(call); //调用相关对象的方法 oos.writeObject(call); //向客户发送包含了执行结果的Call对象 ois.close(); oos.close(); socket.close(); } } public Call invoke(Call call){ Object result=null; try{ String className=call.getClassName(); String methodName=call.getMethodName(); Object[] params=call.getParams(); Class classType=Class.forName(className); Class[] paramTypes=call.getParamTypes(); Method method=classType.getMethod(methodName,paramTypes); Object remoteObject=remoteObjects.get(className); //从缓存中取出相关的远程对象 if(remoteObject==null){ throw new Exception(className+"的远程对象不存在"); }else{ result=method.invoke(remoteObject,params); } }catch(Exception e){result=e;} call.setResult(result); //设置方法执行结果 return call; } public static void main(String args[])throws Exception { SimpleServer server=new SimpleServer(); //把事先创建的HelloServiceImpl对象加入到服务器的缓存中 server.register("remotecall.HelloService",new HelloServiceImpl()); server.service(); } }