Android--向服务器提交数据的两种方法Post和Get

最新推荐文章于 2021-05-29 16:03:51 发布

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最新推荐文章于 2021-05-29 16:03:51 发布

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分类专栏：笔记文章标签： BDawn android 提交数据

本文链接：https://blog.youkuaiyun.com/BDawn/article/details/42088201

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本文探讨了在Android应用中实现用户输入验证及通过HTTP POST和GET方法进行网络请求的基本流程，包括错误处理和响应消息展示。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

有些方法用的不是很好，希望大家多多指正

public class MainActivity extends ActionBarActivity {
    EditText et_name;
    EditText et_password;
    Button b_post;
    Button b_get;
    URL url;
    HttpURLConnection conn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_name = (EditText)findViewById(R.id.et_name);
        et_password = (EditText)findViewById(R.id.et_password);
        b_get = (Button)findViewById(R.id.b_get);
        b_post = (Button)findViewById(R.id.b_post);
    }
    public void clik(final View view){
        new Thread(){
            @Override
            public void run() {
                super.run();
                String <span style="font-family:System;">name</span> = et_name.getText().toString();
                String password = et_password.getText().toString();
                if (name.isEmpty()|| password.isEmpty()){
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(MainActivity.this,"用户名或密码不能为空",Toast.LENGTH_SHORT).show();
                        }
                    });
                    return;
                }
                final String s;
                if (view.getId() == R.id.b_get){
                    s= d<span style="font-family:System;">oGet(name ,password);</span>
                }else {
                    s= do<span style="font-family:System;">Post(name ,password);</span>
                }
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(MainActivity.this,s,Toast.LENGTH_SHORT).show();
                    }
                });
            }
        }.start();
    }
    public String doPost(String name,String password){
        String u = "http://192.168.2.3:8080/Web/TestServlet";
        String date = "name=" + name + "&password=" + password;
        try {
            url = new URL(u);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setConnectTimeout(5000);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            PrintWriter pw = new PrintWriter(conn.getOutputStream());
            pw.print(date);
            pw.flush();
            int code = conn.getResponseCode();
            System.out.println(code);
            if (code == 200){
                InputStream is = conn.getInputStream();
                String s = new BufferedReader(new InputStreamReader(is)).readLine();
                System.out.println(s);
                return s;
            }else{
                return "连接失败...";
            }

        } catch (Exception e) {
            e.printStackTrace();
            return "连接失败...";
        }
    }
    public String doGet(String name,String password){
        String u = "http://192.168.2.3:8080/Web/<span style="font-family: Arial, Helvetica, sans-serif;">TestServlet</span>";
        String date = "?name=" + name + "&password=" + password;
        try {
            url = new URL(u + date);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(5000);
            int code = conn.getResponseCode();
            if (code == 200){
                InputStream is = conn.getInputStream();
                String s = new BufferedReader(new InputStreamReader(is)).readLine();
                System.out.println(s);
                return s;
            }else{
                return "连接失败...";
            }
        } catch (Exception e) {
            e.printStackTrace();
            return "连接失败...";
        }
    }
}