URL url = new URL("http://www.baidu.com/s?ie=utf-8&bs=23&f=8&rsv_bp=1&wd=23&rsv_sug3=1&rsv_sug4=89&rsv_sug1=1&inputT=0");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setDoOutput(true);
InputStream inStream = conn.getInputStream();
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();
outStream.close();
inStream.close();
System.out.println(new String(data, "utf-8"));
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setDoOutput(true);
InputStream inStream = conn.getInputStream();
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();
outStream.close();
inStream.close();
System.out.println(new String(data, "utf-8"));
现在就是想拿到服务器返回回来的这个页面的html。
我刚刚试了试http://www.8u.cn/members/login.asp这个网站。这个网站的登陆表格是post的,但是我的程序也得不到登陆后的界面。
import java.io.*;
import java.util.*;
import java.net.*;public class sdsw {public static void main(String[] args) { /**
* 向指定URL发送POST方法的请求
*
* @param url
* 发送请求的URL
* @param params
* 请求参数,请求参数应该是name1=value1&name2=value2的形式。
* @return URL所代表远程资源的响应
*/
String url="http://www.8u.cn/members/login.asp";String params="usrname=todayfriday&usrpass=zxdzxd";
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"); // 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(params);
// flush输出流的缓冲
out.flush(); // 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += "\n" + line;
System.out.println(line);
}
} catch (Exception e) {
System.out.println("发送POST请求出现异常!" + e);
e.printStackTrace();
}
// 使用finally块来关闭输出流、输入流
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}