HttpUtils.java

package com.jqmobile.core.http2;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import javax.servlet.http.HttpServletRequest;

import com.jqmobile.core.utils.json.JSONConvertor2;
import com.jqmobile.core.utils.json.JSONObject;

/**
 * <p>HTTP 请求工具类</p>
 * <p>遵从久其移动《客户端通讯协议》
 * <p>Copyright: 版权所有 (c) 2002 - 2015<br>
 * Company: 久其</p>
 *
 * @author modi
 * @version 2014年3月17日
 */
public class HttpUtils implements HttpInvoke{
	public static final String HTTP_CONNTENT_TYPE = "text/html";
	public static final String CHARSET = "UTF-8";
	private final String serviceAddress;
	private int timeOut = 10000;
	public HttpUtils(String url, String uri){
		this.serviceAddress = url+uri;
	}
	public void setTimeOut(int timeOut) {
		this.timeOut = timeOut;
	}
	public int getTimeOut() {
		return timeOut;
	}
	/**
	 * 获得请求ip
	 * @param request
	 * @return String
	 */
	public static String getRemortIP(HttpServletRequest request) {
		if (request.getHeader("x-forwarded-for") == null) {
			return request.getRemoteAddr();
		}
		return request.getHeader("x-forwarded-for");
	}
	@Override
	public HttpSerializableObject invoke(HttpSerializableObject obj)
			throws HttpException, Throwable {
		//create connection
		HttpURLConnection conn = connect(serviceAddress);
		conn.setConnectTimeout(timeOut);
		conn.setReadTimeout(timeOut);
		conn.connect();
		//request
		PrintWriter out = new PrintWriter(new OutputStreamWriter(
				conn.getOutputStream(), CHARSET));
		JSONObject ret = JSONConvertor2.serializable(obj);//new JSONObject(obj);
		String requestString = ret.toString();
		out.print(requestString);
		out.flush();
		out.close();
		//response
		StringBuilder sResult = new StringBuilder();
		int responseCode = conn.getResponseCode();
		if (responseCode == HttpURLConnection.HTTP_OK) {
			InputStream httpInput = null;
			BufferedReader httpReader = null;

			// 读取数据
			httpInput = conn.getInputStream();
			httpReader = new BufferedReader(new InputStreamReader(
					httpInput, CHARSET));
			String line = null;
			while ((line = httpReader.readLine()) != null) {
				if (sResult.length() > 0) {
					sResult.append("\n");
				}
				sResult.append(line);
			}
		} else {
			throw new HttpException(HttpException.REQUEST_REFUSE, "请求服务器失败:"+responseCode);
		}
		if(null == sResult || "".equals(sResult.toString().trim())){
			return null;
		}
		JSONObject result = new JSONObject(sResult.toString());
		return (HttpSerializableObject)JSONConvertor2.unAutoSerializable(result, HttpSerializableObject.class);
	}
	/**
	 * 通过URL建立连接
	 * @param url
	 * @return
	 * @throws IOException
	 */
	public static HttpURLConnection connect(String url) throws IOException {
		URL _url = null;
		try {
			_url = new URL(url);
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}
		
		HttpURLConnection conn = null;
		//
		conn = (HttpURLConnection) _url.openConnection();
		conn.setDoOutput(true);
		conn.setDoInput(true);
		conn.setRequestMethod("POST");
		conn.setUseCaches(false);
		conn.setRequestProperty("Content-type", HTTP_CONNTENT_TYPE);
		conn.setRequestProperty("Charset", CHARSET);
		//
		return conn;
	}
}