<JAVA问题>如何通过URLConnection读写WWW资源?

先创建一个URL,比如URL baidu = new URL("http://www.baidu.com"),
然后返回一个URLConnection,即URLConnection baiduConnection = baidu.openConnetion();
现在可以用这个URLConneciton来读写了.
DataInputStream datain = new DataInputStream(baiduConnection.getInputStream);
DataOutputStream dataout = new DataOutputStream(baiduConnection.getOutputStream);
读是datain.read();写是dataout.write();