android的两种网络请求方式关键代码详解

第一种，通过httpclient方式的异步加载过程

new AsyncTask<Void, Void, String>(){

        @Override
        protected String doInBackground(Void... params) {
            try {
                //创建一个网络连接
                HttpClient client=new DefaultHttpClient();
                //设置端口
                HttpPost post=new HttpPost("http://172.88.134.132:8080/ems/addEmp");
                post.setHeader("Content-Type", "appliction/x-www-form-urlencoded");
                //获得而一个解析实体类(在这一步开始的异常)
                List<NameValuePair> parameters=new ArrayList<NameValuePair>();
                parameters.add(new BasicNameValuePair("name", emp.getName()));
                parameters.add(new BasicNameValuePair("Salary", String.valueOf(emp.getSalary())));
                parameters.add(new BasicNameValuePair("age", String.valueOf(emp.getAge())));
                parameters.add(new BasicNameValuePair("gender", emp.getGender()));
                HttpEntity entity=new UrlEncodedFormEntity(parameters);
                //终于到了我们的请求响应
                HttpResponse resp = client.execute(post);
                //两种方法去解析我们的结果
                //第一种
           

//第二种

String result=EntityUtils.toString(resp.getEntity());

return result;

} catch (Exception e) {

e.printStackTrace();

}

return null;
        }
        @Override
        protected void onPostExecute(String result) {
            listener.onAddFinish(result);
        }
    }.execute();
           

第二种 通过另启动一个线程，HttpURLConnection的连接

new Thread(){

@Override

public void run() {

try {

URL url=new URL(“http://172.88.134.132:8080/ems/regist.do“);

HttpURLConnection connection=(HttpURLConnection) url.openConnection();

//请求方式

connection.setRequestMethod(“POST”);

//接受服务器的响应

connection.setDoInput(true);

//向服务器提供数据

connection.setDoOutput(true);

//在请求头中为，请求的内容说明，设置请求n参数

connection.setRequestProperty(“Content-Type”, “application/x-www-form-urlencoded”);

connection.connect();

//客户端提交数据

OutputStream out = connection.getOutputStream();

PrintWriter pw=new PrintWriter(out,true);

// String params=”log”+user.getName()+”“+user.getPassword()+”“+user.getRealname()+”“+user.getEmail();

String params=getParams(user);

pw.print(params);

pw.close();

//从客户端获取服务器响应

InputStream in =connection.getInputStream();

BufferedReader br=new BufferedReader(new InputStreamReader(in));

final String result=br.readLine();

br.close();

//在主线程执行

new Handler(Looper.getMainLooper()).post(new Runnable() {

@Override

public void run() {

listener.onregistFinishlistener(result);

}

});

} catch (Exception e) {

e.printStackTrace();

}

}

}.start();