Android向服务器提交数据(方式:get、post、AsyncHttpClient )

今天说下想服务器提交数据的方式:
服务端:
方法:

  @RequestMapping("dologin.xhtml")
   public String login(HttpServletRequest req){
      String  uname=req.getParameter("uname");
      String password=req.getParameter("pwd");

        System.out.println("uname="+uname+" upass="+password);
         String result=null;
        //判断数据库
        if("admin".equals(uname)&&"123456".equals(password)){
            result="success";
        }else{
            result="fail";
        }

        req.setAttribute("result", result);
        //System.out.println(uname+""+password);
        return "loginResult";
    }

登录界面:

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<html>
<HEAD>
    <TITLE> ZTREE DEMO - Standard Data TITLE>
HEAD>
<body>

<form action="dologin.xhtml" method="post">
        name:<input type="text" name="uname"/><br/>
        password:<input type="text" name="pwd"/><br/>
        <input type="submit" value="登录"/><br/>
    form>
 div>
body>
html>

返回结果页面:

<%@ page language="java" contentType="text/plain; charset=UTF-8"
    pageEncoding="UTF-8"%>${result}

移动端:

xml:


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.example.an_comit_data_to_server.MainActivity">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="admin"
        android:id="@+id/et_main_uname"
        />

    <EditText
        android:id="@+id/et_main_upass"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="123456" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="loginByGet"
        android:text="登录(GET)" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="loginByPost"
        android:text="登录(POST)" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="loginByAsyncHttpClient"
        android:text="登录(AsyncHttpClient)" />

LinearLayout>

activity:



 private EditText et_main_uname;
    private EditText et_main_upass;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

             et_main_uname =(EditText) findViewById(R.id.et_main_uname);
            et_main_upass = (EditText) findViewById(R.id.et_main_upass);
    }

    //get方式登录
    public void loginByGet(View view){

        String uname=et_main_uname.getText().toString();
        String password= et_main_upass.getText().toString();

        String path="http://172.21.202.8:8090/front/dologin.xhtml";

        new Mytask().execute(uname,password,path,"GET");

    }

    //post方式登录
    public void  loginByPost(View view){
        String uname=et_main_uname.getText().toString();
        String password= et_main_upass.getText().toString();
        String path="http://172.21.202.8:8090/front/dologin.xhtml";
        //可变数组
        new  Mytask().execute(uname, password, path, "POST");
    }

        AsyncHttpClient asyncHttpClient=new AsyncHttpClient();
        RequestParams requestParams=new RequestParams();
        requestParams.put("uname",uname);
        requestParams.put("upass",upass);
        asyncHttpClient.post(path,requestParams,new TextHttpResponseHandler(){
            @Override
            public void onSuccess(int statusCode, Header[] headers, String responseBody) {
                super.onSuccess(statusCode, headers, responseBody);
                Toast.makeText(MainActivity.this, responseBody, Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, String responseBody, Throwable error) {
                super.onFailure(statusCode, headers, responseBody, error);
            }
        });

    }



    class MyTask extends AsyncTask {

        private HttpURLConnection connection;
        private URL url;

        @Override
        protected Object doInBackground(Object[] objects) {

            //获取参数的值
            String uname = objects[0].toString();
            String upass = objects[1].toString();
            String path = objects[2].toString();
            String type = objects[3].toString();

            String str="uname="+uname+"&pwd="+password;
            try {
                if ("GET".equals(type)) {
                    //用GET方式提交
                    path = path + "?"+str;
                    url = new URL(path);
                    connection =  (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod(type);
                } else if ("POST".equals(type)) {
                    //用POST方式提交
                    url = new URL(path);
                    connection =  (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod(type);
                    //设置contentType  contentLength
                    connection.setRequestProperty("Content-Length",str.length()+"");
                    connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
                    //设置允许对外输出数据
                    connection.setDoOutput(true);
                    //将用户名和密码提交到服务器
                    connection.getOutputStream().write(str.getBytes());
                }
                connection.setConnectTimeout(5000);
                if (connection.getResponseCode() == 200) {
                    InputStream is = connection.getInputStream();
                    BufferedReader br = new BufferedReader(new InputStreamReader(is));
                    String result = br.readLine();
                    return result;
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }
        @Override
        protected void onPostExecute(Object o) {
            super.onPostExecute(o);

            String s = (String) o;
            Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();

        }
    }


}

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