android怎么传map对象到服务器

android怎么传map对象到服务器

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 {
**
* 使用get请求以普通方式提交数据
*
* @param map
* 传递进来的数据，以map的形式进行了封装
* @param path
* 要求服务器servlet的地址
* @return 返回的boolean类型的参数
* @throws Exception
*/
public Boolean submitDataByDoGet(Map map, String path)
throws Exception {
// 拼凑出请求地址
StringBuilder sb = new StringBuilder(path);
sb.append("?");
for (Map.Entry 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 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 entry : map.entrySet()) {
sb.append(entry.getKey()).append("=").append(entry.getValue());
sb.append("&");
}
sb.deleteCharAt(sb.length() - 1);
String str = sb.toString();[/font][/size]
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 map,
String path) throws Exception {
HttpClient hc = new DefaultHttpClient();
// 请求路径
StringBuilder sb = new StringBuilder(path);
sb.append("?");
for (Map.Entry 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());[/font][/size]
HttpResponse response = hc.execute(request);
if (response.getStatusLine().getStatusCode() == HttpURLConnection.HTTP_OK) {
return true;
}
return false;
}

复制代码


public Boolean submintDataByHttpClientDoPost(Map 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 parameters = new ArrayList();
for (Map.Entry 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;
}
}

转化为 json 字符串 ，然后直接去json