android http 连接

public class HttpClient {

public static String sendHttpClientPost(String path,
Map<String, String> map, String encode) {
List<NameValuePair> list = new ArrayList<NameValuePair>();
if (map != null && !map.isEmpty()) {
for (Map.Entry<String, String> entry : map.entrySet()) {
list.add(new BasicNameValuePair(entry.getKey(), entry
.getValue()));
}
}
try {
// 实现将请求的参数封装到表单中，请求体当中
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, encode);
// 使用Post方式提交数据
HttpPost httpPost = new HttpPost(path);
httpPost.setEntity(entity);
// 执行Post请求
DefaultHttpClient client = new DefaultHttpClient();
HttpResponse httpResponse = client.execute(httpPost);
if (httpResponse.getStatusLine().getStatusCode() == 200) {
httpResponse.getEntity().getContent();
return changInputStream(httpResponse.getEntity().getContent(),
encode);
}
else{
System.out.println("error");
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "";

}

public static String changInputStream(InputStream inputStream,String encode) {

//将输入流变成字符串
ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
byte[] data=new byte[1024];
int len=0;
String result="";
try{
if(inputStream!=null){
while((len=inputStream.read(data))!=-1){
byteArrayOutputStream.write(data,0,len);

}
}
result=new String(byteArrayOutputStream.toByteArray(),encode);
}catch(Exception e){

}

return result;
}

public static void main(String[] args) {
// TODO Auto-generated method stub

String path="http://10.118.163.171/http/HttpServlet";
Map<String, String> params = new HashMap<String, String>();
params.put("name", "admin");
params.put("pwd", "199273");
String result = sendHttpClientPost(path, params, "utf-8");
System.out.println("--result-->" + result);
}

}