Android_HttpClient_get請求post表單提交上傳

關於HttpUrlConnection用法 1.HttpRequestBase(HttpGet..) HttpClient 支持多種訪問網絡的方式，包括GET, HEAD, POST, PUT, DELETE, TRACE and OPTIONS. 其對應子類為HttpGet, HttpHead, HttpPost, HttpPut, HttpDelete, HttpTrace, and HttpOptions.但在使用時多為HttpGet, HttpPost兩種方式。 [java]  /**   * 一個簡單的get請求   */   private static void get() {       // 1.得到HttpClient對象       HttpClient httpClient = new DefaultHttpClient();       // 2.實例化一個HttpGet對象       HttpGet httpGet = new HttpGet("http://www.baidu.com");       try {           // 3.httpClient執行httpGet請求           HttpResponse response = httpClient.execute(httpGet);           HttpEntity entity = response.getEntity();           if (entity != null) { // 如果有數據表示請求成功               System.out.println(EntityUtils.toString(entity, "utf-8"));           } else {               System.out.println("連接失敗！");           }       } catch (Exception e) {           e.printStackTrace();       } finally {           // 4.釋放資源(Shuts down this connection manager and releases allocated           // resources)           httpClient.getConnectionManager().shutdown();       }   }   2.HttpResponse 通過得到HttpResponse對象，可以得到相關訪問網絡的信息，比如getEntity() getStatusLine()等等 [java]   System.out.println(response.getProtocolVersion());   System.out.println(response.getStatusLine().getStatusCode());   System.out.println(response.getStatusLine().getReasonPhrase());   System.out.println(response.getStatusLine().toString());   輸出結果為 [java]   /*  HTTP/1.1  200  OK  HTTP/1.1 200 OK  */   [java]  //得到請求的響應數據   //方式一.   HttpEntity entity = response.getEntity();   if (entity != null) { // 如果有數據表示請求成功       System.out.println(EntityUtils.toString(entity, "utf-8"));   } else {       System.out.println("連接失敗！");   }   //方式二.   if(response.getStatusLine().getStatusCode() == 200){       HttpEntity myEntity = response.getEntity();       BufferedInputStream in = new BufferedInputStream(myEntity.getContent());       byte[] bytes = read(in);//通過自定義的read方法，取得該輸入流對應的數據   }   3.ResponseHandler [java]   /**   * 通過ResponseHandler處理請求   */   private static void test() {       HttpClient httpClient = new DefaultHttpClient();       HttpGet httpGet = new HttpGet("http://www.baidu.com");              //自定義ResponseHandler對象       ResponseHandler<String> myHandler = new ResponseHandler<String>() {           @Override           public String handleResponse(HttpResponse response)                   throws ClientProtocolException, IOException {               HttpEntity entity = response.getEntity();               String result = "連接失敗！";               if (entity != null) { // 如果有數據表示請求成功                   result = EntityUtils.toString(entity, "utf-8");               }               return result;           }       };       try {           String result = httpClient.execute(httpGet, myHandler);//接收該myHandler對象           System.out.println(result);       } catch (Exception e) {           e.printStackTrace();       } finally {       // 釋放資源(Shuts down this connection manager and releases allocated resources)           httpClient.getConnectionManager().shutdown();       }   }   4.Post完成Form表單的提交 [java]  /**   * 完成form表單的提交   */   private static void post() {       HttpClient httpClient = new DefaultHttpClient();       HttpPost httpPost = new HttpPost("http://127.0.0.1:8080/My/upload");          try {           // 為httpPost設置HttpEntity對象           List<NameValuePair> parameters = new ArrayList<NameValuePair>();           parameters.add(new BasicNameValuePair("username", "zhangsan"));           parameters.add(new BasicNameValuePair("password", "123321"));           HttpEntity entity = new UrlEncodedFormEntity(parameters);           httpPost.setEntity(entity);           // httpClient執行httpPost表單提交           HttpResponse response = httpClient.execute(httpPost);           // 得到服務器響應實體對象           HttpEntity responseEntity = response.getEntity();           if (responseEntity != null) {               System.out.println(EntityUtils                       .toString(responseEntity, "utf-8"));               System.out.println("表單上傳成功！");           } else {               System.out.println("服務器無響應！");           }       } catch (Exception e) {           e.printStackTrace();       } finally {           // 釋放資源           httpClient.getConnectionManager().shutdown();       }   }   5.Post完成文件的長傳 [java]  /**   * 通過post完成文件的上傳   */   private static void postFile() {       HttpClient httpClient = new DefaultHttpClient();       HttpPost httpPost = new HttpPost("http://127.0.0.1:8080/My/upload");       try {           // 需要上傳的文件           String root = "D:/api/";           String fileName = "JDK6.0 中文文檔.CHM";           File uploadFile = new File(root+fileName);           //定義FileEntity對象           HttpEntity entity = new FileEntity(uploadFile);           //為httpPost設置頭信息           httpPost.setHeader("filename", URLEncoder.encode(fileName,"utf-8"));//服務器可以讀取到該文件名           httpPost.setHeader("Content-Length", String.valueOf(entity.getContentLength()));//設置傳輸長度           httpPost.setEntity(entity); //設置實體對象                      // httpClient執行httpPost提交           HttpResponse response = httpClient.execute(httpPost);           // 得到服務器響應實體對象           HttpEntity responseEntity = response.getEntity();           if (responseEntity != null) {               System.out.println(EntityUtils.toString(responseEntity, "utf-8"));               System.out.println("文件 "+fileName+"上傳成功！");           } else {               System.out.println("服務器無響應！");           }       } catch (Exception e) {           e.printStackTrace();       } finally {           // 釋放資源           httpClient.getConnectionManager().shutdown();       }   }