模拟登陆实现不了！！！求指教！100分哦！
本帖最后由 xyz 于 2013-06-30 22:08:12 编辑
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Scanner;
import javax.imageio.ImageIO;
import javax.net.ssl.HttpsURLConnection;//这句貌似没有用到！
public class wangrongfeng
{
public static void Login() throws Exception
{
// 下载验证码到本地
URL url = new URL("http://5pi.cn/code.php");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setUseCaches(false);
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setConnectTimeout(5000);
connection.setReadTimeout(10000);
((HttpURLConnection) connection).setRequestMethod("GET");
connection.setRequestProperty("User-Agent",
"Mozilla/5.0 (compatible; MSIE 8.0; Windows 7)");
connection.connect();
String cookies = connection.getHeaderField("Set-Cookie");
if (cookies!= null)
{
cookies = cookies.substring(0, cookies.indexOf(";"));
}
File imgCodeFile = new File("/Users/mac/Pictures"
+ System.currentTimeMillis() + ".gif");
BufferedImage image = ImageIO.read(connection.getInputStream());
ImageIO.write(image, "gif", imgCodeFile);
String checkCode = GetCheckCode();
String nextUrl = "http://5pi.cn/task_list.php?taskfrom=all&order=point";
nextUrl = URLEncoder.encode(nextUrl, "GBK");
//用户要输入值
String userName = "mememomo";
String password = "wrfl1346";
String chkcode = checkCode;
//生成地址https://login.passport.9you.com/checkCode?id=SSO_PAY&s=5384a672b08ac3e96ad534ac67e30442&userIp=60.191.73.11&userName=zhao88zhao8&password=458458&identifyingCode=5pre
String paramStr = "?"+ "&userName=" + userName + "&password=" + password + "&chkcode=" + chkcode+"login=1";
String loginUrl = "http://5pi.cn/member/checklogin.php" + paramStr;
System.out.println("请求地址:" + loginUrl);
//根据
url = new URL("http://5pi.cn/member/checklogin.php");
connection = (HttpURLConnection) url.openConnection();
connection.setUseCaches(false);
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setConnectTimeout(20000);
connection.setReadTimeout(20000);
connection.setRequestMethod("GET");
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", String.valueOf(paramStr.length()));
connection.setRequestProperty("Cookie", cookies);
connection.setRequestProperty("User-Agent",
"Mozilla/5.0 (compatible; MSIE 8.0; Windows 7)");
connection.connect();
DataOutputStream dos = new DataOutputStream(connection.getOutputStream());
dos.writeBytes(paramStr);
dos.flush();
dos.close();
int res = connection.getResponseCode();
if (res == 200)
{
BufferedReader in = new BufferedReader(new InputStreamReader(
connection.getInputStream(), "GBK"));
String retVal;
while ((retVal = in.readLine()) != null)
{
System.out.println(retVal);
}
}
}
private static String GetCheckCode()
{
Scanner sc = new Scanner(System.in);
System.out.print("验证码在C:\\ImageCode目录下 ,请你查看并输入:");
String inputCode = sc.next();
System.out.println("您输入的验证码是:" + inputCode);
return inputCode;
}
public static void main(String[] args)throws Exception
{
wangrongfeng.Login();
}
} 
我的做法就是模拟登陆5pi.cn这个网站，但是我用wireshark抓包的时候抓包抓到的是
我想知道，是不是系统本身设定的是post请求，是不是我用了get就不对了？
还有我的get的请求参数是不是不对？尤其是我只添加了密码和帐号验证码以及后面的那个抓到的标志！其余的还需要添加什么么？
抱歉，我是新手，第一次常识做这个，求大神解救哦！！！！！！！！ java 验证码 模拟登陆 URL 异常
[解决办法]
应该是不能用get的，开源项目httpclient比较好用
post地址:http://5pi.cn/member/checklogin.php
参数:
username:mememomo
password:******
chkcode:5354
login:1
[解决办法]
给你一个模拟登录qq空间的例子:
登录方法:
public static String login(final String qq,final String password){
HashMap<String, String> params=new HashMap<String, String>();
params.put("login_url", "http://pt.3g.qq.com/s?aid=nLogin");
params.put("sidtype", "1");
params.put("loginTitle", "手机腾讯网");
params.put("bid", "0");
params.put("qq", qq);
params.put("pwd", password);
params.put("loginType", "1");
try {
String response=WebUtils.doPost(QQ_LOGIN_URL, params, 0, 0);
int sidIndex=response.indexOf("sid");
SID=response.substring(sidIndex+4, sidIndex+28);
} catch (IOException e) {
e.printStackTrace();
}
return SID;
}
public static String doPost(String url, Map<String, String> params,int connectTimeout,int readTimeout) throws IOException {
String query=buildQuery(params, DEFAULT_CHARSET);
byte[] content=null;
if(query!=null){
content=query.getBytes(DEFAULT_CHARSET);
}
return doPost(url, CTYPE, content, connectTimeout, readTimeout);
}
public static String doPost(String url, String ctype, byte[] content,int connectTimeout,int readTimeout) throws IOException {
HttpURLConnection conn = null;
OutputStream out = null;
String rsp = null;
try {
try{
conn = getConnection(new URL(url), METHOD_POST, ctype);
conn.setConnectTimeout(connectTimeout);
conn.setReadTimeout(readTimeout);
out = conn.getOutputStream();
out.write(content);
rsp = getResponseAsString(conn);
}catch(IOException e){
throw e;
}
}finally {
if (out != null) {
out.close();
}
if (conn != null) {
conn.disconnect();
}
}
return rsp;
}
private static HttpURLConnection getConnection(URL url, String action, String ctype)
throws IOException {
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod(action);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestProperty("Accept", "text/xml,text/javascript,text/html");
conn.setRequestProperty("User-Agent", USER_AGENT);
conn.setRequestProperty("Content-Type", ctype);
return conn;
}
private static String getStreamAsString(InputStream stream, String charset) throws IOException {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(stream, charset));
StringWriter writer = new StringWriter();
char[] chars = new char[256];
int count = 0;
while ((count = reader.read(chars)) > 0) {
writer.write(chars, 0, count);
}
return writer.toString();
} finally {
if (stream != null) {
stream.close();
}
}
}
