如何通过Android向特定URL高效发送GET和POST请求？

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javaAndroid中使用URL发送GET和POST请求，示例代码如下：

javapackage cn.com.sino_device.msmartdemo.util;

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.URL;

public class HttpUtil { public static void main(String[] args) { String urlString=指定URL; String getResponse=sendGetRequest(urlString); String postResponse=sendPostRequest(urlString, 参数); System.out.println(GET请求结果: + getResponse); System.out.println(POST请求结果: + postResponse); }

public static String sendGetRequest(String urlString) { try { URL url=new URL(urlString); BufferedReader in=new BufferedReader(new InputStreamReader(url.openStream())); String inputLine; StringBuffer response=new StringBuffer(); while ((inputLine=in.readLine()) !=null) { response.append(inputLine); } in.close(); return response.toString(); } catch (IOException e) { e.printStackTrace(); return null; } }

public static String sendPostRequest(String urlString, String params) { try { URL url=new URL(urlString); PrintWriter out=new PrintWriter(url.openConnection().getOutputStream()); out.print(params); out.close();

BufferedReader in=new BufferedReader(new InputStreamReader(url.openConnection().getInputStream())); String inputLine; StringBuffer response=new StringBuffer(); while ((inputLine=in.readLine()) !=null) { response.append(inputLine); } in.close(); return response.toString(); } catch (IOException e) { e.printStackTrace(); return null; } }}

Android向指定URL发送GET和POST请求

package cn.com.sino_device.msmartdemo.util; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; /** * Android向指定URL发送GET和POST请求 */ public class HttpRequest { /** * 向指定URL发送GET请求 * * @param url 发送请求的URL * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @return URL 所代表远程资源的响应结果 */ public String sendGet(String url, String param) { String result = ""; BufferedReader in = null; try { String urlNameString = url + "?" + param; URL realUrl = new URL(urlNameString); // 打开和URL之间的连接 URLConnection connection = realUrl.openConnection(); connection.setConnectTimeout(5000); connection.setReadTimeout(5000); // 设置通用的请求属性 connection.setRequestProperty("accept", "*/*"); connection.setRequestProperty("connection", "Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 建立实际的连接 connection.connect(); // 获取所有响应头字段 Map > map = connection.getHeaderFields(); // 遍历所有的响应头字段 /* for (String key : map.keySet()) { System.out.println(key + "--->" + map.get(key)); }*/ // 定义 BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader(connection.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { // System.out.println("发送GET请求出现异常！" + e); e.printStackTrace(); } // 使用finally块来关闭输入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } return result; } /** * 向指定URL发送POST请求 * * @param url 发送请求的 URL * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @return 所代表远程资源的响应结果 */ public String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); // 设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); conn.setConnectTimeout(5000); conn.setReadTimeout(5000); // 获取URLConnection对象对应的输出流 out = new PrintWriter(conn.getOutputStream()); // 发送请求参数 out.print(param); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送 POST 请求出现异常！" + e); e.printStackTrace(); } //使用finally块来关闭输出流、输入流 finally { try { if (out != null) { out.close(); } if (in != null) { in.close(); } } catch (IOException ex) { ex.printStackTrace(); } } return result; } }