编程语言 php java

Java模拟Http Get和Post 提交

java HTML我帮您 1年前  0次浏览
本帖最后由 html580 于 2014-5-15 10:06 编辑 在工具中有时我们要进行模态表单提交数据,现在给大家一个通过通过HttpURLConnection模拟Http Get和Post表单提交。
相关文章: Java 使用HttpClient模拟 Http Get和Post 提交
package com.html580.connection;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

import org.junit.Test;

public class URLConnectionHelper {
/**
* 向指定URL发送GET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
*/
public static String sendGet(String url, String params) {
String result = "";
BufferedReader in = null;
try {
String urlName = url + "?" + params;
URL realUrl = new URL(urlName);
// 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)");

// 建立实际的连接
conn.connect();
// 获取所有响应头字段

Map> map = conn.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "-" + map.get(key));
}

// 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;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常!" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}

/**
* 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
*/
public static String sendPost(String url, String params) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
HttpURLConnection conn = (HttpURLConnection)realUrl.openConnection();

conn.setRequestMethod("POST");
// 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);
conn.connect();
// 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;
}
} 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;
}



public void testSendGet() {
String url = "http://localhost:8080/jeeweb/testServlet";
String params = "username=admin&password=123456";
String str = URLConnectionHelper.sendGet(url, params);
System.out.println(str);
}

@Test
public void testSendPost() {
String url = "http://localhost:8080/jeeweb/testServlet";
String params = "username=admin&password=123456";
String str = URLConnectionHelper.sendPost(url, params);
System.out.println(str);
}
}
测试Servlet
package com.html580.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* @author html580.com
* 测试模拟表单提交Servlet
*/
public class TestServlet extends HttpServlet {

/**
* Destruction of the servlet.

*/
public void destroy() {
super.destroy();
}

/**
* The doGet method of the servlet.

*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String userid;
String passwd;
userid = request.getParameter("username");
passwd = request.getParameter("password");
System.out.println(userid);
System.out.println(passwd);
System.err.println("get");
}

/**
* The doPost method of the servlet.

*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String userid;
String passwd;
userid = request.getParameter("username");
passwd = request.getParameter("password");
System.out.println(userid);
System.out.println(passwd);
System.err.println("Post");
}

/**
* Initialization of the servlet.

*/
public void init() throws ServletException {
// Put your code here
}
}




发表评论