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(
.URLEncoder.encode(parameters.get(name),"UTF-8"));
}params=sb.toString();
}else{for(String name : parameters.keySet()) {
sb.append(name).append("=").append(
.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
.URL connURL = .URL(full_url);//打开URL连接
.HttpURLConnection httpConn =(.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(
.URLEncoder.encode(parameters.get(name),"UTF-8"));
}params =sb.toString();
}else{for(String name : parameters.keySet()) {
sb.append(name).append("=").append(
.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
.URL connURL = .URL(url);//打开URL连接
.HttpURLConnection httpConn =(.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("", parameters);
System.out.println(result);
}
}
