java 发送 http请求——HttpClient
使用HttpClient来发送Http请求
引入两个包：[1]org.apache.httpcomponents.httpclient_x.x.x.jar [2]org.apache.httpcomponents.httpcore_x.x.x.jar
下载链接：Apache HttpComponents - HttpComponents Downloads
参考文档：[1]HttpClient Tutorial [2]HttpClient Example
1 package http; 2 3 import java.io.IOException; 4 import java.io.InputStream; 5 6 import org.apache.http.Header; 7 import org.apache.http.HttpEntity; 8 import org.apache.http.ProtocolVersion; 9 import org.apache.http.StatusLine; 10 import org.apache.http.client.ClientProtocolException; 11 import org.apache.http.client.config.RequestConfig; 12 import org.apache.http.client.methods.CloseableHttpResponse; 13 import org.apache.http.client.methods.HttpGet; 14 import org.apache.http.impl.client.CloseableHttpClient; 15 import org.apache.http.impl.client.HttpClients; 16 17 18 19 public class HttpConnector { 20 public static void main(String[] args) { 21 CloseableHttpClient httpClient = HttpClients.createDefault(); 22 RequestConfig requestConfig = RequestConfig.custom() 23 .setConnectTimeout(1000) 24 .setSocketTimeout(1000) 25 .build(); 26 HttpGet get = new HttpGet("http://i.easou.com/s.m?q=电影&wver=t"); 27 get.setConfig(requestConfig); 28 29 /* 30 HttpPost post = new HttpPost("http://i.easou.com/s.m"); 31 post.setConfig(requestConfig); 32 List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 33 nameValuePairs.add(new BasicNameValuePair("q", "电影")); 34 nameValuePairs.add(new BasicNameValuePair("wver", "t")); 35 UrlEncodedFormEntity urlEntity; 36 urlEntity = new UrlEncodedFormEntity(nameValuePairs,Consts.UTF_8); 37 post.setEntity(urlEntity); 38 */ 39 CloseableHttpResponse response = null; 40 try { 41 response = httpClient.execute(get); 42 /* 43 response = httpClient.execute(post); 44 */ 45 StatusLine statusLine = response.getStatusLine(); 46 ProtocolVersion protocolVersion = statusLine.getProtocolVersion(); 47 String reasonPhrase = statusLine.getReasonPhrase(); 48 int statusCode = statusLine.getStatusCode(); 49 System.out.println(statusLine + "\n" + protocolVersion + " " + statusCode + " " + reasonPhrase); 50 /*#############################################################################################*/ 51 HttpEntity httpEntity = response.getEntity(); 52 if(httpEntity != null) { 53 Header contentType = httpEntity.getContentType(); 54 Header contentEncoding = httpEntity.getContentEncoding(); 55 long contentLength = httpEntity.getContentLength(); 56 boolean isStreaming = httpEntity.isStreaming(); 57 boolean isRepeatable = httpEntity.isRepeatable(); 58 boolean isChunked = httpEntity.isChunked(); 59 System.out.println(contentType + " | " + contentEncoding + " | " + contentLength + " | " + isStreaming + "/" + isRepeatable + "/" + isChunked); 60 /*#############################################################################################*/ 61 InputStream is = httpEntity.getContent(); 62 byte[] buff = new byte[512]; 63 while(is.read(buff) > 0) { 64 for(byte b : buff) { 65 System.out.print((char) b); 66 } 67 } 68 is.close(); 69 /*#############################################################################################*/ 70 } 71 } catch (ClientProtocolException e) { 72 e.printStackTrace(); 73 } catch (IOException e) { 74 e.printStackTrace(); 75 } finally { 76 if(response != null) { 77 try { 78 response.close(); 79 } catch (IOException e) { 80 e.printStackTrace(); 81 } 82 } 83 } 84 try { 85 httpClient.close(); 86 } catch (IOException e) { 87 e.printStackTrace(); 88 } 89 } 90 91 }
