http请求服务

package cn.zgjkw.ehome.util;


import java.io.*; 
import java.net.*;
import java.util.*;




public class GetPostUtil
{


public static void main(String[] args) {
GetPostUtil.sendPost("http://localhost:8080/zjknh/admin/login.html", "logname="+"hehe"+"&"+"password="+"2134354");
}
/**
* 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<String, List<String>> 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
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); // params.toString().getBytes("UTF-8");
// 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 static String send(String method, String url, StringBuilder parameter) {
URL urlObj;
HttpURLConnection httpConn;
BufferedReader in = null;
String result = "";
try {
urlObj = new URL(url);
httpConn = (HttpURLConnection) urlObj.openConnection();
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
httpConn.setRequestMethod(method); // POST/GET


// 发送请求参数
httpConn.getOutputStream().write(
parameter.toString().getBytes("UTF-8"));
httpConn.getOutputStream().flush();
httpConn.getOutputStream().close();
httpConn.getResponseCode();
// httpConn.getInputStream();// 仅执行但不获取返回内容


// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += "\n" + line;
}


} catch (Exception 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;
}

}