HttpClientUtil.java示例代码

	        package api.util;
 
            import java.io.BufferedReader;
            import java.io.InputStreamReader;
            import java.util.List;
             
            import org.apache.http.HttpResponse;
            import org.apache.http.NameValuePair;
            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.CloseableHttpClient;
            import org.apache.http.impl.client.HttpClients;
             
            public class HttpClientUtil {
                private static String USER_AGENT = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; customie8)";
             
                // HTTP GET request
                public static String sendGet(String url, String charset) throws Exception {
                    CloseableHttpClient client = null;
                    StringBuffer result = null;
                    try {
                        client = HttpClients.createDefault();
                        HttpGet request = new HttpGet(url);
             
                        // add request header
                        request.addHeader("User-Agent", USER_AGENT);
             
                        HttpResponse response = client.execute(request);
             
                        // System.out.println("Response Code : " +
                        // response.getStatusLine().getStatusCode());
                        BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), charset));
             
                        result = new StringBuffer();
                        String line = "";
                        while ((line = rd.readLine()) != null) {
                            result.append(line);
                        }
                        return result.toString();
                    } catch (Exception e) {
                        e.printStackTrace();
                    } finally {
                        client.close();
                    }
                    return result.toString();
                }
             
                // HTTP POST request
                public static String sendPost(String url, List<NameValuePair> param, String charset) throws Exception {
                    CloseableHttpClient client = null;
                    StringBuffer result = null;
                    try {
                        client = HttpClients.createDefault();
                        HttpPost post = new HttpPost(url);
             
                        // add header
                        post.setHeader("User-Agent", USER_AGENT);
                        post.setEntity(new UrlEncodedFormEntity(param));
                        HttpResponse response = client.execute(post);
                        // System.out.println("Post parameters : " + post.getEntity());
                        // System.out.println("Response Code : " +
                        // response.getStatusLine().getStatusCode());
             
                        BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), charset));
                        result = new StringBuffer();
                        String line = "";
                        while ((line = rd.readLine()) != null) {
                            result.append(line);
                        }
                        return result.toString();
                    } catch (Exception e) {
                        e.printStackTrace();
                    } finally {
                        client.close();
                    }
                    return result.toString();
                }
            }