详解Android提交数据到服务器的两种方式四种方法

Android应用开发中，会经常要提交数据到服务器和从服务器得到数据，本文主要是给出了利用http协议采用HttpClient方式向服务器提交数据的方法。

代码比较简单，这里不去过多的阐述，直接看代码。

public class SubmitDataByHttpClientAndOrdinaryWay {
 
 public Boolean submitDataByDoGet(Map<String, String> map, String path) throws Exception {
 // 拼凑出请求地址
 StringBuilder sb = new StringBuilder(path);
 sb.append("?");
 for (Map.Entry<String, String> entry : map.entrySet()) {
  sb.append(entry.getKey()).append("=").append(entry.getValue());
  sb.append("&");
 }
 sb.deleteCharAt(sb.length() - 1);
 String str = sb.toString();
 System.out.println(str);
 URL Url = new URL(str);
 HttpURLConnection HttpConn = (HttpURLConnection) Url.openConnection();
 HttpConn.setRequestMethod("GET");
 HttpConn.setReadTimeout(5000);
 // GET方式的请求不用设置什么DoOutPut()之类的吗？
 if (HttpConn.getResponseCode() == HttpURLConnection.HTTP_OK) {
  return true;
 }
 return false;
 }
 
 public Boolean submitDataByDoPost(Map<String, String> map, String path) throws Exception {
 // 注意Post地址中是不带参数的，所以newURL的时候要注意不能加上后面的参数
 URL Url = new URL(path);
 // Post方式提交的时候参数和URL是分开提交的，参数形式是这样子的：name=y&age=6
 StringBuilder sb = new StringBuilder();
 // sb.append("?");
 for (Map.Entry<String, String> entry : map.entrySet()) {
  sb.append(entry.getKey()).append("=").append(entry.getValue());
  sb.append("&");
 }
 sb.deleteCharAt(sb.length() - 1);
 String str = sb.toString();
 HttpURLConnection HttpConn = (HttpURLConnection) Url.openConnection();
 HttpConn.setRequestMethod("POST");
 HttpConn.setReadTimeout(5000);
 HttpConn.setDoOutput(true);
 HttpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
 HttpConn.setRequestProperty("Content-Length", String.valueOf(str.getBytes().length));
 OutputStream os = HttpConn.getOutputStream();
 os.write(str.getBytes());
 if (HttpConn.getResponseCode() == HttpURLConnection.HTTP_OK) {
  return true;
 }
 return false;
 }
 
 public Boolean submitDataByHttpClientDoGet(Map<String, String> map, String path) throws Exception {
 HttpClient hc = new DefaultHttpClient();
 // 请求路径
 StringBuilder sb = new StringBuilder(path);
 sb.append("?");
 for (Map.Entry<String, String> entry : map.entrySet()) {
  sb.append(entry.getKey()).append("=").append(entry.getValue());
  sb.append("&");
 }
 sb.deleteCharAt(sb.length() - 1);
 String str = sb.toString();
 System.out.println(str);
 HttpGet request = new HttpGet(sb.toString());
 HttpResponse response = hc.execute(request);
 if (response.getStatusLine().getStatusCode() == HttpURLConnection.HTTP_OK) {
  return true;
 }
 return false;
 }
 
 public Boolean submintDataByHttpClientDoPost(Map<String, String> map, String path) throws Exception {
 // 1. 获得一个相当于浏览器对象HttpClient，使用这个接口的实现类来创建对象，DefaultHttpClient
 HttpClient hc = new DefaultHttpClient();
 // DoPost方式请求的时候设置请求，关键是路径
 HttpPost request = new HttpPost(path);
 // 2. 为请求设置请求参数，也即是将要上传到web服务器上的参数
 List<NameValuePair> parameters = new ArrayList<NameValuePair>();
 for (Map.Entry<String, String> entry : map.entrySet()) {
  NameValuePair nameValuePairs = new BasicNameValuePair(entry.getKey(), entry.getValue());
  parameters.add(nameValuePairs);
 }
 // 请求实体HttpEntity也是一个接口，我们用它的实现类UrlEncodedFormEntity来创建对象，注意后面一个String类型的参数是用来指定编码的
 HttpEntity entity = new UrlEncodedFormEntity(parameters, "UTF-8");
 request.setEntity(entity);
 // 3. 执行请求
 HttpResponse response = hc.execute(request);
 // 4. 通过返回码来判断请求成功与否
 if (response.getStatusLine().getStatusCode() == HttpURLConnection.HTTP_OK) {
  return true;
 }
 return false;
 }
}

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