java模拟http

1、采用post方式，并且可以取得返回值

 

/**
	 * 采用post方式向服务器发起申请
	 * @param serviceURL
	 * @param params
	 * @return
	 * @throws Exception
	 */
	public static boolean doPost(String serviceURL) throws Exception { 
	   	 HttpURLConnection conn = null;
	        OutputStream outStream = null;
	        InputStream inStream = null;

	        @SuppressWarnings("unused")
			Map<String, String> retMap = new HashMap<String, String>();
	        String retString=null;
	        boolean rst=false;
	      
	            URL url = new URL(serviceURL);
	            conn = (HttpURLConnection) url.openConnection();
	            conn.setDoOutput(true);
	            conn.setDoInput(true);

	            String serviceData="";
	           
	            outStream = conn.getOutputStream();
	            BufferedWriter bw = new BufferedWriter(new java.io.OutputStreamWriter(outStream, "UTF-8"));
	            bw.write(serviceData);
	            bw.flush();
	            bw.close();
	            outStream.flush();
	            outStream.close();
	            bw = null;
	            outStream = null;

	            Thread.sleep(10*1000);
	            inStream = conn.getInputStream();
	            BufferedReader br = new BufferedReader(new InputStreamReader(inStream, "gb2312"));
	            StringBuffer retBuffer = new StringBuffer(20000);
	            for (String line = null; (line = br.readLine()) != null;) {
	               retBuffer.append(line);
	            }
	            System.out.println(retBuffer.toString());
	            br.close();
	            inStream.close();
	            br = null;
	            inStream = null;

	            retString = retBuffer.toString().trim();
	            retBuffer = null;
	            conn.disconnect();
	        
	            
	            if(InitConfig.getParameter(Constants.SMS_SUCCESS).equals(retString)){
	            	rst=true;
	            }
	            
	       	 return rst;
	        
		}

 

 

 

注意到：如果想要组织数据的话，可以再加一个形参用来接收。

且此方法不需要用到任何额外的jar包。

 

 

2、get方法

/**
	 * 未采取任何编码
	 * @param url
	 * @param queryString
	 * @return
	 * @throws Exception
	 */
	 public static String doGet(String url, String queryString) throws Exception { 
	        String response = null; 
	        HttpClient client = new HttpClient(); 
	        HttpMethod method = new GetMethod(url); 
	        try { 
	                if (queryString !=null && !queryString.equals("")) 
	                        method.setQueryString(URIUtil.encodeQuery(queryString)); 
	                client.executeMethod(method); 
	                if (method.getStatusCode() == HttpStatus.SC_OK) { 
	                        response = method.getResponseBodyAsString(); 
	                        System.out.println("response is :"+response);
	                } 
	        }finally { 
	                method.releaseConnection(); 
	        } 
	        return response; 
	    } 

 

 

注意到：此方法要用到commons-httpclient-3.0-rc2.jar和commons-codec-1.6.jar。

 

refurl:http://lavasoft.blog.51cto.com/62575/175911/