package ln;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.util.HashMap;

import java.util.List;

import java.util.Map;/**

* 用于模拟HTTP请求中GET/POST方式

* @author landa

**/

public classHttpUtils {/**

* 发送GET请求

*

* @param url

* 目的地址

* @param parameters

* 请求参数，Map类型。

* @return 远程响应结果*/

public static String sendGet(String url, Mapparameters) {

String result="";

BufferedReaderin = null;//读取响应输入流

StringBuffer sb = new StringBuffer();//存储参数

String params = "";//编码之后的参数

try{//编码请求参数

if(parameters.size()==1){for(String name:parameters.keySet()){

sb.append(name).append("=").append(

java.net.URLEncoder.encode(parameters.get(name),"UTF-8"));

}params=sb.toString();

}else{for(String name : parameters.keySet()) {

sb.append(name).append("=").append(

java.net.URLEncoder.encode(parameters.get(name),"UTF-8")).append("&");

}

String temp_params=sb.toString();params = temp_params.substring(0, temp_params.length() - 1);

}

String full_url= url + "?" + params;

System.out.println(full_url);//创建URL对象

java.net.URL connURL = newjava.net.URL(full_url);//打开URL连接

java.net.HttpURLConnection httpConn =(java.net.HttpURLConnection) connURL

.openConnection();//设置通用属性

httpConn.setRequestProperty("Accept", "*/*");

httpConn.setRequestProperty("Connection", "Keep-Alive");

httpConn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");//建立实际的连接

httpConn.connect();//响应头部获取

Map> headers =httpConn.getHeaderFields();//遍历所有的响应头字段

for(String key : headers.keySet()) {

System.out.println(key + "\t：\t" + headers.get(key));

}//定义BufferedReader输入流来读取URL的响应,并设置编码方式

in = new BufferedReader(newInputStreamReader(httpConn

.getInputStream(),"UTF-8"));

String line;//读取返回的内容

while ((line = in.readLine()) != null) {

result+=line;

}

}catch(Exception e) {

e.printStackTrace();

}finally{try{if (in != null) {in.close();

}

}catch(IOException ex) {

ex.printStackTrace();

}

}returnresult ;

}/**

* 发送POST请求

*

* @param url

* 目的地址

* @param parameters

* 请求参数，Map类型。

* @return 远程响应结果*/

public static String sendPost(String url, Mapparameters) {

String result= "";//返回的结果

BufferedReader in = null;//读取响应输入流

PrintWriter out = null;

StringBuffer sb= new StringBuffer();//处理请求参数

String params = "";//编码之后的参数

try{//编码请求参数

if (parameters.size() == 1) {for(String name : parameters.keySet()) {

sb.append(name).append("=").append(

java.net.URLEncoder.encode(parameters.get(name),"UTF-8"));

}params =sb.toString();

}else{for(String name : parameters.keySet()) {

sb.append(name).append("=").append(

java.net.URLEncoder.encode(parameters.get(name),"UTF-8")).append("&");

}

String temp_params=sb.toString();params = temp_params.substring(0, temp_params.length() - 1);

}//创建URL对象

java.net.URL connURL = newjava.net.URL(url);//打开URL连接

java.net.HttpURLConnection httpConn =(java.net.HttpURLConnection) connURL

.openConnection();//设置通用属性

httpConn.setRequestProperty("Accept", "*/*");

httpConn.setRequestProperty("Connection", "Keep-Alive");

httpConn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");//设置POST方式

httpConn.setDoInput(true);

httpConn.setDoOutput(true);//获取HttpURLConnection对象对应的输出流

out = newPrintWriter(httpConn.getOutputStream());//发送请求参数

out.write(params);//flush输出流的缓冲

out.flush();//定义BufferedReader输入流来读取URL的响应，设置编码方式

in = new BufferedReader(newInputStreamReader(httpConn

.getInputStream(),"UTF-8"));

String line;//读取返回的内容

while ((line = in.readLine()) != null) {

result+=line;

}

}catch(Exception e) {

e.printStackTrace();

}finally{try{if (out != null) {out.close();

}if (in != null) {in.close();

}

}catch(IOException ex) {

ex.printStackTrace();

}

}returnresult;

}/**

* 主函数，测试请求

*

* @param args*/

public static voidmain(String[] args) {

Map parameters = new HashMap();

parameters.put("name", "sarin");

String result=sendGet("http://www.baidu.com", parameters);

System.out.println(result);

}

}