import java.io.ByteArrayOutputStream;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.List;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.HttpEntityEnclosingRequestBase;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.mime.MultipartEntity;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.protocol.HTTP;import org.apache.http.util.EntityUtils;/** * Connect to the internet *  * @author crane *  */public class HttpTools {    /**     * Post data to server     *      * @param sUrl     * @param entity     * @return     */    public static String postData(String sUrl, MultipartEntity entity) {        String destUrl = "";        destUrl = sUrl;        String sResult = "";        // instantiate HttpPost object from the url address        HttpEntityEnclosingRequestBase httpRequest = new HttpPost(destUrl);        try {            httpRequest.setEntity(entity);            // execute the post and get the response from servers            HttpResponse httpResponse = new DefaultHttpClient()                    .execute(httpRequest);            int code = httpResponse.getStatusLine().getStatusCode();            if (httpResponse.getStatusLine().getStatusCode() == 200) {                // get the result                String strResult = EntityUtils.toString(httpResponse                        .getEntity());                sResult = strResult;                System.out.println(strResult);            } else {                System.out.println("Error Response"                        + httpResponse.getStatusLine().toString());            }        } catch (Exception e) {            System.out.println("error occurs");        }        return sResult;    }    /**     * Get data from server     *      * @param urlPath     * @return     */    public static String getData(String sUrl) {        String urlPath = sUrl;        ByteArrayOutputStream outStream = null;        String sResult = "";        try {            outStream = new ByteArrayOutputStream();            byte[] data = new byte[1024];            int len = 0;            URL url = new URL(urlPath);            HttpURLConnection conn = (HttpURLConnection) url.openConnection();            InputStream inStream = conn.getInputStream();            while ((len = inStream.read(data)) != -1) {                outStream.write(data, 0, len);            }            inStream.close();            sResult = new String(outStream.toByteArray()).trim();        } catch (Exception e) {            e.printStackTrace();        }        return sResult;    }    public static String post(String sUrl, List
     
       parameters) {        HttpClient httpClient = new DefaultHttpClient();        HttpPost httpPost = new HttpPost(sUrl);        String sResult = "";        try {            HttpEntity entity = new UrlEncodedFormEntity(parameters, HTTP.UTF_8); // 设置编码，防止中文乱码            httpPost.setEntity(entity);            // httpClient执行httpPost表单提交            HttpResponse response = httpClient.execute(httpPost);            // 得到服务器响应实体对象            HttpEntity responseEntity = response.getEntity();            if (responseEntity != null) {                sResult = EntityUtils.toString(responseEntity, "utf-8");                System.out.println("表单上传成功！");            } else {                System.out.println("服务器无响应！");            }        } catch (Exception e) {            e.printStackTrace();        } finally {            // 释放资源            httpClient.getConnectionManager().shutdown();        }        return sResult.replace("，", ",");    }} 所需jar包：