MyHttpClientHelper.java

package com.zhong.helper;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class MyHttpClientHelper {

	public static byte[] loadByteFromURL(String url) {
		HttpClient httpClient = new DefaultHttpClient();
		HttpGet httpGet = new HttpGet(url);
		HttpResponse response;
		try {
			response = httpClient.execute(httpGet);
			if (response.getStatusLine().getStatusCode() == 200) {
				HttpEntity httpEntity = response.getEntity();
				return EntityUtils.toByteArray(httpEntity);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	public static InputStream loadFileFromURL(String url) {
		HttpClient httpClient = new DefaultHttpClient();
		HttpGet httpGet = new HttpGet(url);
		HttpResponse response;
		try {
			response = httpClient.execute(httpGet);
			if (response.getStatusLine().getStatusCode() == 200) {
				HttpEntity httpEntity = response.getEntity();
				return httpEntity.getContent();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	public static String loadTextFromURL(String url, String charset) {
		HttpClient httpClient = new DefaultHttpClient();
		HttpGet httpGet = new HttpGet(url);
		HttpResponse response;
		try {
			response = httpClient.execute(httpGet);
			if (response.getStatusLine().getStatusCode() == 200) {
				HttpEntity httpEntity = response.getEntity();
				return EntityUtils.toString(httpEntity, charset);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	public byte[] doGetSubmit(String url) {
		return loadByteFromURL(url);
	}

	public static byte[] doPostSubmit(String url, List<NameValuePair> params) {
		HttpClient httpClient = new DefaultHttpClient();
		HttpPost httpPost = new HttpPost();
		try {
			httpPost.setEntity(new UrlEncodedFormEntity(params, "utf-8"));
			HttpResponse response = httpClient.execute(httpPost);
			if (response.getStatusLine().getStatusCode() == 200) {
				HttpEntity entity = response.getEntity();
				return EntityUtils.toByteArray(entity);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}

	public static byte[] doPostSubmit(String url, Map<String, Object> params) {
		HttpClient httpClient = new DefaultHttpClient();
		HttpPost httpPost = new HttpPost();
		try {

			List<NameValuePair> list = new ArrayList<NameValuePair>();

			for (Entry<String, Object> entry : params.entrySet()) {
				NameValuePair nameValuePair = new BasicNameValuePair(
						entry.getKey(), entry.getValue().toString());
				list.add(nameValuePair);
			}
			httpPost.setEntity(new UrlEncodedFormEntity(list, "utf-8"));
			HttpResponse response = httpClient.execute(httpPost);
			if (response.getStatusLine().getStatusCode() == 200) {
				HttpEntity entity = response.getEntity();
				return EntityUtils.toByteArray(entity);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
}