java.net.*操作session/GET/POST方法
终于又考完一门试，开始做课程设计了，结果课程设计给工作室一个尾气3个月的项目，而这次的先用我写的贴吧放上去，我变得暂时空闲了，开始着手写校内开心农场小工具- 全能拖拉机。 首先要解决的就是校内登录的问题，那就是Get/Post方法了，还有用户状态保存，就是session的操作。Java不同于C#，那位可以集成系统 的浏览器或者之间创建一个Browser。 开始写了自己的第一个版本。 import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.URL; import java.net.HttpURLConnection; public class FarmerHelper { /** * @param args * @throws ProtocolException */ public static void main(String[] args) throws ProtocolException { String loginUrlStr = "http://login.xiaonei.com/Login.do"; String homeUrlStr = "http://home.xiaonei.com/Home.do"; URL loginUrl = null; URL homeUrl = null; HttpURLConnection loginConn = null; HttpURLConnection homeConn = null; try { loginUrl = new URL(loginUrlStr); homeUrl = new URL(homeUrlStr); try { loginConn = (HttpURLConnection) loginUrl.openConnection(); homeConn = (HttpURLConnection) homeUrl.openConnection(); } catch (IOException e) { print("Conn't open the url connection!"); e.printStackTrace(); } } catch (MalformedURLException e) { print("Illegal URL!"); e.printStackTrace(); return; } loginConn.setRequestMethod("POST"); loginConn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.0.10)" + " Gecko/2009042316 Firefox/3.0.10"); loginConn.setRequestProperty("Keep-Alive", "300"); loginConn.setRequestProperty("Connection", "keep-alive"); loginConn.setRequestProperty("email", "alswlwangzi@163.com"); loginConn.setRequestProperty("password", "xh77Gffb_i"); loginConn.setRequestProperty("submit", "登录"); loginConn.setRequestProperty("Keep-Alive", "300"); try { loginConn.connect(); String headerName = null; String cookie = ""; /* * for (int i=0; (headerName = * loginConn.getHeaderFieldKey(i))!=null; i++) { if * (headerName.equals("Set-Cookie")) { cookie = * loginConn.getHeaderField(i); print(cookie); } } */ cookie = loginConn.getHeaderField("Set-Cookie"); print(cookie); homeConn.setRequestProperty("Cookie", cookie); homeConn.setRequestMethod("GET"); homeConn.connect(); BufferedReader in = new BufferedReader(new InputStreamReader( homeConn.getInputStream())); String lineStr = null; while ((lineStr = in.readLine()) != null) { // print(lineStr); print(new String(lineStr.getBytes("GBK"), "UTF-8")); } } catch (IOException e) { print("conn't connect to the server!"); e.printStackTrace(); } } private static void print(Object o) { System.out.println(o); } } 想法总是好的，现实总是残酷的，调试很久，用WireShark抓包，都是有Length Required错误，这个比较头疼，我感觉是我session传递的问题（其实不是，后来发现是Post的格式问题），于是网上找来一个Session操作类。 ...