Android网络数据之向服务器提交数据的三种方式（get+post+AsyncHttpClient）

2019-11-06 10:00:00

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前几次研究了Android端怎样解析web端上传的网络数据，这次我们来一起研究研究Android网络数据之向服务器提交数据的三种方式（get+post+AsyncHttpClient）

首先先来看看Android端的测试页面截图：（两个编辑框，分别为用户名和密码框，如若输入的的用户名密码是admin 123 的话，就会吐司success，否则就会吐司fail，三种方式，分别为三个按钮，也就是三个onclick事件）

我们先在web端写一个登录页面，以及登录方法：（SSH框架）

LoginAction.class:

public class LoginAction extends ActionSupport{	PRivate String uname;	private String upass;		public String getUname() {		return uname;	}	public void setUname(String uname) {		this.uname = uname;	}	public String getUpass() {		return upass;	}	public void setUpass(String upass) {		this.upass = upass;	}	public String login() throws Exception {				System.out.println("uname="+uname+" upass="+upass);				String result=null;		//判断数据库		if("admin".equals(uname)&&"123456".equals(upass)){			result="success";		}else{			result="fail";		}				ServletActionContext.getRequest().setAttribute("result", result);				return "loginResult";	}}     login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>	<form action="loginActionlogin.action" method="post">		Uname:<input type="text" name="uname"/><br/>		Upass:<input type="text" name="upass"/><br/>		<input type="submit" value="登录"/><br/>	</form></body></html>
    loginresult.jsp
<%@ page language="java" contentType="text/plain; charset=UTF-8"    pageEncoding="UTF-8"%>${result}   struts.xml
		<action name="loginAction*" class="com.zking.action.LoginAction" method="{1}">		    	<result name="loginResult">/loginResult.jsp</result>		</action>
     web端的页面准备好了，现在我们来Android端提交数据  main.xml
  <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)" />
  main.activiy：
public class MainActivity extends AppCompatActivity {    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);    }    public void loginByGet(View view) {        String uname = et_main_uname.getText().toString();        String upass = et_main_upass.getText().toString();        String path = getString(R.string.server_name) + "loginActionlogin.action";        //可变数组        new MyTask().execute(uname, upass, path, "GET");    }    public void loginByPost(View view) {        String uname = et_main_uname.getText().toString();        String upass = et_main_upass.getText().toString();        String path = getString(R.string.server_name) + "loginActionlogin.action";        //可变数组        new MyTask().execute(uname, upass, path, "POST");    }    public void loginByAsyncHttpClient(View view) {        String uname = et_main_uname.getText().toString();        String upass = et_main_upass.getText().toString();        String path = getString(R.string.server_name) + "loginActionlogin.action";        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+"&upass="+upass;            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();        }    }}
  在这里，我将三种提交数据方式共同使用一个AsynTask，减少了重复的代码，但是注意，有些代码在不同的提交方式判断里面是不能够删掉的，比如：
                    connection =  (HttpURLConnection) url.openConnection();                    connection.setRequestMethod(type);