http使用apache工具类提交数据

package com.http.post;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;public class HttpUtils {public HttpUtils() {// TODO Auto-generated constructor stub}public static String sendHttpClientPost(String path,Map<String, String> map, String encode) {List<NameValuePair> list = new ArrayList<NameValuePair>();if (map != null && !map.isEmpty()) {for (Map.Entry<String, String> entry : map.entrySet()) {list.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));}}try {// 实现将请求的参数封装到表单中,请求体重UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, encode);// 使用Post方式提交数据HttpPost httpPost = new HttpPost(path);httpPost.setEntity(entity);// 指定post请求DefaultHttpClient client = new DefaultHttpClient();HttpResponse httpResponse = client.execute(httpPost);if (httpResponse.getStatusLine().getStatusCode() == 200) {return changeInputStream(httpResponse.getEntity().getContent(),encode);}} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return "";}/** * 将一个输入流转换成指定编码的字符串 *  * @param inputStream * @param encode * @return */public static String changeInputStream(InputStream inputStream,String encode) {// TODO Auto-generated method stubByteArrayOutputStream outputStream = new ByteArrayOutputStream();byte[] data = new byte[1024];int len = 0;String result = "";if (inputStream != null) {try {while ((len = inputStream.read(data)) != -1) {outputStream.write(data, 0, len);}result = new String(outputStream.toByteArray(), encode);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return result;}/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubString path = "http://172.16.47.156:8080/myhttp/LoginServlet";Map<String, String> params = new HashMap<String, String>();params.put("username", "admin");params.put("password", "123");String result = HttpUtils.sendHttpClientPost(path, params, "utf-8");System.out.println("-->>" + result);}}