android中用GET和POST的方法向服务器上传数据

两者的区别如下：

GET上传的数据一般是很小的并且安全性能不高的数据，而POST上传的数据适用于数据量大，数据类型复杂，数据安全性能要求高的地方

GET和POST的使用方法一般如下：

1.采用GET方式向服务器传递数据的步骤

1.利用Map集合对数据进行获取并进行数据处理
if (params!=null&&!params.isEmpty()) {
for (Map.Entry<String, String> entry:params.entrySet()) {

sb.append(entry.getKey()).append("=");
sb.append(URLEncoder.encode(entry.getValue(),encoding));
sb.append("&");
   }
sb.deleteCharAt(sb.length()-1);

}

2.新建一个StringBuilder对象
sb=new StringBuilder()
3.新建一个HttpURLConnection的URL对象，打开连接并传递服务器的path
connection=(HttpURLConnection) new URL(path).openConnection();
4.设置超时和连接的方式

connection.setConnectTimeout(5000);
connection.setRequestMethod("GET");

2.采用POST方式向服务器传递数据的步骤

1.利用Map集合对数据进行获取并进行数据处理
if (params!=null&&!params.isEmpty()) {
for (Map.Entry<String, String> entry:params.entrySet()) {

sb.append(entry.getKey()).append("=");
sb.append(URLEncoder.encode(entry.getValue(),encoding));
sb.append("&");
   }
sb.deleteCharAt(sb.length()-1);

}

2.新建一个StringBuilder对象，得到POST传给服务器的数据
sb=new StringBuilder()
byte[] data=sb.toString().getBytes();
3.新建一个HttpURLConnection的URL对象，打开连接并传递服务器的path
connection=(HttpURLConnection) new URL(path).openConnection();
4.设置超时和允许对外连接数据
connection.setDoOutput(true);
5.设置连接的setRequestProperty属性

connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", data.length+"");
6.得到连接输出流
outputStream =connection.getOutputStream();
7.把得到的数据写入输出流中并刷新
outputStream.write(data);
outputStream.flush();

3.具体实现的过程如下：
1.使用GET方法上传数据
服务器中doGet方法中的代码如下：

[java] view plaincopyprint?protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        String name =request.getParameter("name");
        String age=request.getParameter("age");
        System.out.println("--------name:"+name);
        System.out.println("--------age:"+age);

    }

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

  String name =request.getParameter("name");
  String age=request.getParameter("age");
  System.out.println("--------name:"+name);
  System.out.println("--------age:"+age);

}
在客户端实现的代码如下：

[java] view plaincopyprint?public class UserSerivce {

    public static boolean save(String getname, String getage) throws Exception {

        String path = "http://10.254.1.62/WebForGETMethod/ServletForGetMethod";

        Map<String, String> params = new HashMap<String, String>();
        params.put("name", getname);
        params.put("age", getage);

        return sendGETRequest(path, params, "UTF-8");
    }

    private static boolean sendGETRequest(String path,
            Map<String, String> params, String encoding) throws Exception {

        StringBuilder sb = new StringBuilder(path);
        if (params != null && !params.isEmpty()) {
            sb.append("?");
            for (Map.Entry<String, String> entry : params.entrySet()) {

                sb.append(entry.getKey()).append("=");
                sb.append(URLEncoder.encode(entry.getValue(), encoding));
                sb.append("&");
            }
            sb.deleteCharAt(sb.length() - 1);
        }

        HttpURLConnection connection = (HttpURLConnection) new URL(
                sb.toString()).openConnection();
        connection.setConnectTimeout(5000);
        connection.setRequestMethod("GET");
        if (connection.getResponseCode() == 200) {
            return true;
        }

        return false;
    }

}

public class UserSerivce {

public static boolean save(String getname, String getage) throws Exception {

String path = "http://10.254.1.62/WebForGETMethod/ServletForGetMethod";

  Map<String, String> params = new HashMap<String, String>();
  params.put("name", getname);
  params.put("age", getage);

return sendGETRequest(path, params, "UTF-8");
}

private static boolean sendGETRequest(String path,
Map<String, String> params, String encoding) throws Exception {

  StringBuilder sb = new StringBuilder(path);
  if (params != null && !params.isEmpty()) {
   sb.append("?");
   for (Map.Entry<String, String> entry : params.entrySet()) {

sb.append(entry.getKey()).append("=");
sb.append(URLEncoder.encode(entry.getValue(), encoding));
&n

补充：移动开发 , Android ,