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系统注册登录查看信息忘记密码项目+maven后端app前端+mob平台短信验证+阿里云服务器部署

作者:互联网

系统注册登录查看信息忘记密码项目+maven后端app前端+mob平台短信验证+阿里云服务器部署

IDEA编写后端代码

maven项目的创建
数据库连接
建表,数据库增删查改操作
对每个函数功能模块测试
后端网页编写及测试
用json实现与客户端的数据传输

maven项目的创建
数据库操作
部分代码:

package Servlet;

import lab2.*;
import net.sf.json.JSONObject;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.security.MessageDigest;

@WebServlet("/Sign")
public class Sign extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Sign() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.setContentType("text/html;charset=UTF-8");
        String username = request.getParameter("username").trim();
        String password = request.getParameter("password").trim();
        PrintWriter out = response.getWriter();
        UserOp uo = new UserOp();
        PersonOp po = new PersonOp();
        DB_conn_op sjk = null;
        try {
            sjk = new DB_conn_op();
        } catch (Exception e) {
            e.printStackTrace();
        }
        JSONObject res = new JSONObject();
        boolean flag = false;//username是否存在
        try {
            flag = uo.findUser1(new User(username,password),sjk);
            if(flag){//如果找到user
                Person p = po.findPerson1(username,sjk);
                res.put("username",p.getUsername());
                res.put("name",p.getName());
                if(p.getAge()!=null)
                    res.put("age",p.getAge().toString());
                else res.put("age","");
                if(p.getTeleno()!=null)
                    res.put("teleno",p.getTeleno());
                else res.put("teleno","");
            }
            else res.put("error","登陆失败,用户名或密码错误");

        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println(res);
        out.println(res);
        try {
            sjk.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        out.close();
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }
}

android编写客户端代码

mob平台申请短信验证服务
layout布局的设计和编写
实现activity函数,前端后端进行数据传输
使用哪个手机进行测试

部分代码:

package com.example.client;

import androidx.appcompat.app.AppCompatActivity;
import android.os.AsyncTask;
import  android.widget.Button;
import android.os.Bundle;
import android.view.*;
import android.content.*;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONObject;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {
    private EditText username;
    private EditText password;
    private TextView err;
    private Button b1;//注册按钮
    private Button b2;//登录按钮
    private Button b3;//忘记密码按钮
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        username = (EditText) findViewById(R.id.username);
        password = (EditText) findViewById(R.id.password);
        err = (TextView) findViewById(R.id.message);
        b1 = (Button) findViewById(R.id.register);
        b2 = (Button) findViewById(R.id.login);
        b3 = (Button) findViewById(R.id.login_error);
    }

    public void sign(View view) {    //登录按键的响应按键
        String user = username.getText().toString();
        String pass = password.getText().toString();
        if (user.isEmpty() || pass.isEmpty()) {
            err.setText("登录失败,用户名或密码不能为空");
            err.setVisibility(View.VISIBLE);
        } else {
            err.setText(null);
            err.setVisibility(View.INVISIBLE);
            new SignInProcess().execute(user,pass);
        }
    }

    public void signUp(View view) {   //注册按键的响应按键
        Intent intent = new Intent(MainActivity.this, RegisterActivity.class);
        startActivity(intent);
    }

    public void forget(View view) {   //注册按键的响应按键
        Intent intent = new Intent(MainActivity.this, ChangepassActivity.class);
        startActivity(intent);
    }

    private class SignInProcess extends AsyncTask<String, String, String> {
        @Override
        protected String doInBackground(String... params) {
            String username = params[0];
            String password = params[1];
            String result = "";
            String s_url = "http://101.132.124.216:8080/myservice/Sign?username="+username+"&password="+password;
            System.out.println(s_url);
            try {
                URL url = new URL(s_url);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                conn.setUseCaches(false);
                conn.connect();
                InputStream is = conn.getInputStream();
                InputStreamReader reader = new InputStreamReader(is, "UTF-8");//获取服务器数据实现从字节流到字符流转换
                int temp;
                while((temp=reader.read()) != -1) {
                    result += (char)temp;
                }
            } catch(Exception e) {
                err.setText("登录失败,网络错误");
                err.setVisibility(View.VISIBLE);
                e.printStackTrace();
            }
            System.out.println(result);
            return result;
        }

        @Override
        protected void onPostExecute(String result) {
            try {
                JSONObject result_json = new JSONObject(result);
                if(result_json.has("error")) {
                    String error_code;
                    error_code = result_json.getString("error");
                    err.setText(error_code);
                    err.setVisibility(View.VISIBLE);
                    password.setText(null);
                } else {
                    SignInSuccess(result_json);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }

    private void SignInSuccess(JSONObject info) {
        Intent intent=new Intent();
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.setClass(this,WelcomeActivity.class);

        Toast.makeText(this,"登录成功",Toast.LENGTH_SHORT).show();
        try {
            intent.putExtra("username", info.getString("username"));
            intent.putExtra("name", info.getString("name"));
            intent.putExtra("age", info.getString("age"));
            intent.putExtra("teleno", info.getString("teleno"));
        } catch (Exception e) {
            e.printStackTrace();
        }
        startActivity(intent);
    }
}

项目部署

购买阿里云学生机
配置云服务器环境

配置云服务器环境

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标签:username,String,import,app,maven,intent,new,mob,password
来源: https://blog.csdn.net/m0_45020051/article/details/111932988