HttpHelper.java

package com.jiuqi.njt.data;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.zip.GZIPInputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
/**
 * 
 * <p>TODO 网络请求辅助类</p>
 *
 * <p>Copyright: 版权所有 (c) 2002 - 2008<br>
 * Company: 久其</p>
 *
 * @author jiangxuelei
 * @version 2012-7-24
 */
public class HttpHelper {
	private static HttpClient imageclient;
	@SuppressWarnings("unused")
	private static synchronized HttpClient getImageclient() {
		if(imageclient==null){
			imageclient=CustomerHttpClient.getImageHttpClient(); 
		}
		return imageclient;
	}
	public InputStream openStream(String url) throws IllegalStateException, IOException{
		HttpClient client =CustomerHttpClient.getImageHttpClient(); 
		if(client ==null){
			return null;
		}
		HttpResponse response = client.execute(getHttpPost(url, null));
		if (response.getStatusLine().getStatusCode() != 200) {
			return null;
		}
		HttpEntity entity = response.getEntity();
		InputStream content;
		if(entity.getContentEncoding()!=null&&
				entity.getContentEncoding().getValue().equals("gzip")){
			content = new GZIPInputStream(entity.getContent());
		}else{
		 content = entity.getContent();
		}
		return content;
	}
	public String getEntity(String url, List<? extends NameValuePair> parameters)
			throws IOException {
		return getResponse(getHttpPost(url, new UrlEncodedFormEntity(parameters,"GBK")));
	}
	public String getEntity(String url,  String argumentsExpression)
			throws IOException {
		return getResponse(getHttpPost(url, new StringEntity(argumentsExpression,"GBK")));
	}
	public String getEntity(String url) throws ClientProtocolException,
			IOException {
		return getResponse(getHttpPost(url, null));
	}
	
	public String getEntity(String url,  String argumentsExpression,boolean get)
			throws IOException {
		if(!get)return getResponse(getHttpPost(url, new StringEntity(argumentsExpression,"GBK")));
		else{
			HttpClient client = CustomerHttpClient.getHttpClient();
			HttpGet getter=new HttpGet(url+argumentsExpression);
			HttpResponse response = client.execute(getter);
			if (response.getStatusLine().getStatusCode() != 200) {
				return null;
			}
			HttpEntity entity = response.getEntity();
			InputStream content;
			if(entity.getContentEncoding()!=null&&
					entity.getContentEncoding().getValue().equals("gzip")){
				content = new GZIPInputStream(entity.getContent());
			}else{
			 content = entity.getContent();
			}
			String returnConnection = convertStreamToString(content, "GBK");
			return returnConnection;
		}
	}
	
	private HttpPost getHttpPost(String url,HttpEntity entity){
		String murl=url;
		HttpPost httpPost = new HttpPost(murl);
		httpPost.addHeader("Accept-Encoding","gzip");
		if(entity!=null)httpPost.setEntity(entity);
		return httpPost;
    }
	private String getResponse(HttpPost httpPost) throws IllegalStateException, IOException{
		HttpClient client = CustomerHttpClient.getHttpClient();
		HttpResponse response = client.execute(httpPost);
		if (response.getStatusLine().getStatusCode() != 200) {
			return null;
		}
		HttpEntity entity = response.getEntity();
		InputStream content;
		if(entity.getContentEncoding()!=null&&
				entity.getContentEncoding().getValue().equals("gzip")){
			content = new GZIPInputStream(entity.getContent());
		}else{
		 content = entity.getContent();
		}
		String returnConnection = convertStreamToString(content, "GBK");
		return returnConnection;
	}

	private String convertStreamToString(InputStream is, String Encoding) {
		BufferedReader reader;
		try {
			reader = new BufferedReader(new InputStreamReader(is, "GBK"));
		} catch (UnsupportedEncodingException e1) {
			reader = new BufferedReader(new InputStreamReader(is));
		}
		StringBuilder sb = new StringBuilder();
		String line = null;
		try {
			while ((line = reader.readLine()) != null) {
				sb.append(line);
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				is.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		System.out.println(sb.toString());
		return sb.toString();
		 
	}
	public  static String replaceHttpGetParam(String str) {
		return str.replace("\"", "%22").replace("{", "%7b").replace("}", "%7d");	//特殊字符进行转义
	}
	
	
}