1、設(shè)置明文傳輸?shù)膞ml

<?xml version='1.0' encoding='UTF-8'?><network-security-config> <base-config cleartextTrafficPermitted='true'/></network-security-config>2、引入上述創(chuàng)建的xml

android:networkSecurityConfig='@xml/network_security_config'二、在MyEclipse當(dāng)中創(chuàng)建Web項(xiàng)目

1、創(chuàng)建項(xiàng)目

引入MySQL的驅(qū)動(dòng)包

2、創(chuàng)建實(shí)體類User

package entity;public class User { private int id; private String name; private String username; private String password; private int age; private String phone; public User() { } public User(int id, String name, String username, String password, int age, String phone) {this.id = id;this.name = name;this.username = username;this.password = password;this.age = age;this.phone = phone; } public int getId() {return id; } public void setId(int id) {this.id = id; } public String getName() {return name; } public void setName(String name) {this.name = name; } public String getUsername() {return username; } public void setUsername(String username) {this.username = username; } public String getPassword() {return password; } public void setPassword(String password) {this.password = password; } public int getAge() {return age; } public void setAge(int age) {this.age = age; } public String getPhone() {return phone; } public void setPhone(String phone) {this.phone = phone; }}

3、創(chuàng)建JDBCUtils工具類

package dao;import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;public class JDBCUtils { static {try { Class.forName('com.mysql.jdbc.Driver');} catch (ClassNotFoundException e) { e.printStackTrace();} } public static Connection getConn() {Connection conn = null;try { conn=DriverManager.getConnection('jdbc:mysql://127.0.0.1:3306/test','root','root');}catch (Exception exception){ exception.printStackTrace();}return conn; } public static void close(Connection conn){try { conn.close();} catch (SQLException throwables) { throwables.printStackTrace();} }}

4、創(chuàng)建UserDao類

package dao;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import entity.User;public class UserDao { public boolean login(String name,String password){String sql = 'select * from users where name = ? and password = ?';Connection con = JDBCUtils.getConn();try { PreparedStatement pst=con.prepareStatement(sql); pst.setString(1,name); pst.setString(2,password); if(pst.executeQuery().next()){return true; }} catch (SQLException throwables) { throwables.printStackTrace();}finally { JDBCUtils.close(con);}return false; } public boolean register(User user){String sql = 'insert into users(name,username,password,age,phone) values (?,?,?,?,?)';Connection con = JDBCUtils.getConn();try { PreparedStatement pst=con.prepareStatement(sql); pst.setString(1,user.getName()); pst.setString(2,user.getUsername()); pst.setString(3,user.getPassword()); pst.setInt(4,user.getAge()); pst.setString(5,user.getPhone()); int value = pst.executeUpdate(); if(value>0){return true; }} catch (SQLException throwables) { throwables.printStackTrace();}finally { JDBCUtils.close(con);}return false; } public User findUser(String name){String sql = 'select * from users where name = ?';Connection con = JDBCUtils.getConn();User user = null;try { PreparedStatement pst=con.prepareStatement(sql); pst.setString(1,name); ResultSet rs = pst.executeQuery(); while (rs.next()){ int id = rs.getInt(1); String namedb = rs.getString(2); String username = rs.getString(3); String passworddb = rs.getString(4); int age = rs.getInt(5);String phone = rs.getString(6); user = new User(id,namedb,username,passworddb,age,phone); }} catch (SQLException throwables) { throwables.printStackTrace();}finally { JDBCUtils.close(con);}return user; }}

5、創(chuàng)建對(duì)應(yīng)的LoginServlet

package servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import dao.UserDao;public class LoginServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String name = request.getParameter('name');String password = request.getParameter('password');response.setCharacterEncoding('UTF-8');UserDao dao = new UserDao();boolean login = dao.login(name, password);String msg = '';if(login){msg = '成功';}else{msg = '失敗';}PrintWriter out = response.getWriter();out.println(msg);out.flush();out.close();}}三、在Android Studio當(dāng)中調(diào)用Servlet（一）實(shí)現(xiàn)登錄功能

1、創(chuàng)建連接Servlet的工具類（PostUtil）

package com.example.application01.utils;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLEncoder;//訪問servletpublic class PostUtil { //訪問的serlver不一樣 //傳遞的參數(shù)不一樣 public static String Post(String url,String data) {String msg = '';try{ //http://ms-yffprtappszi:8080/AndroidWeb/LoginServlet HttpURLConnection conn = (HttpURLConnection) new URL('http://10.0.2.2:8080/AndroidWeb/'+url).openConnection(); //設(shè)置請(qǐng)求方式,請(qǐng)求超時(shí)信息 conn.setRequestMethod('POST'); conn.setReadTimeout(5000); conn.setConnectTimeout(5000); //設(shè)置運(yùn)行輸入,輸出: conn.setDoOutput(true); conn.setDoInput(true); //Post方式不能緩存,需手動(dòng)設(shè)置為false conn.setUseCaches(false); //我們請(qǐng)求的數(shù)據(jù): //獲取輸出流 OutputStream out = conn.getOutputStream(); out.write(data.getBytes()); out.flush(); if (conn.getResponseCode() == 200) {// 獲取響應(yīng)的輸入流對(duì)象InputStream is = conn.getInputStream();BufferedReader reader = new BufferedReader(new InputStreamReader(is));StringBuffer response = new StringBuffer();String line=null;while ((line = reader.readLine()) != null) { response.append(line);}msg=response.toString(); }}catch(Exception e){ e.printStackTrace();}return msg; }}

2、在MainActivity調(diào)用這個(gè)類

package com.example.application01;import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.EditText;import android.widget.Toast;import com.example.application01.dao.UserDao;import com.example.application01.utils.PostUtil;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main); } public void reg(View view){startActivity(new Intent(getApplicationContext(),RegisterActivity.class)); } public void login(View view){EditText EditTextname = (EditText)findViewById(R.id.name);EditText EditTextpassword = (EditText)findViewById(R.id.password);new Thread(){ @Override public void run() {String data='';try { data = 'name='+ URLEncoder.encode(EditTextname.getText().toString(), 'UTF-8')+ '&password='+ URLEncoder.encode(EditTextpassword.getText().toString(), 'UTF-8');} catch (UnsupportedEncodingException e) { e.printStackTrace();}String request = PostUtil.Post('LoginServlet',data);int msg = 0;if(request.equals('成功')){ msg = 1;}hand1.sendEmptyMessage(msg); }}.start(); } final Handler hand1 = new Handler() {@Overridepublic void handleMessage(Message msg) { if(msg.what == 1) {Toast.makeText(getApplicationContext(),'登錄成功',Toast.LENGTH_LONG).show(); } else {Toast.makeText(getApplicationContext(),'登錄失敗',Toast.LENGTH_LONG).show(); }} };}

在開啟web項(xiàng)目的情況下運(yùn)行Android項(xiàng)目

1、在web工程當(dāng)中創(chuàng)建RegisterServlet

package servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import dao.UserDao;import entity.User;public class RegisterServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {System.out.println('-----------------');response.setCharacterEncoding('UTF-8');String name = request.getParameter('name');String username = request.getParameter('username');String password = request.getParameter('password');String phone = request.getParameter('phone');int age = Integer.parseInt(request.getParameter('age'));User user = new User();user.setName(name);user.setUsername(username);user.setPassword(password);user.setAge(age);user.setPhone(phone);String msg = '';UserDao userDao = null;User uu = null;userDao = new UserDao(); uu = userDao.findUser(user.getName());boolean flag = false;if(uu == null){flag = userDao.register(user); }if(flag){ msg = '成功';}else{msg = '失敗';} if(uu != null) {msg = '已存在'; }PrintWriter out = response.getWriter();out.println(msg);out.flush();out.close();}}

2、在Android當(dāng)中的RegisterActivity訪問Servlet

package com.example.application01;import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.EditText;import android.widget.Toast;import com.example.application01.dao.UserDao;import com.example.application01.entity.User;import com.example.application01.utils.PostUtil;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;public class RegisterActivity extends AppCompatActivity { EditText name = null; EditText username = null; EditText password = null; EditText phone = null; EditText age = null; @Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_register); name = findViewById(R.id.name); username = findViewById(R.id.username); password = findViewById(R.id.password); phone = findViewById(R.id.phone); age = findViewById(R.id.age); } public void register(View view){String cname = name.getText().toString();String cusername = username.getText().toString();String cpassword = password.getText().toString();System.out.println(phone.getText().toString());String cphone = phone.getText().toString();int cgae = Integer.parseInt(age.getText().toString());if(cname.length() < 2 || cusername.length() < 2 || cpassword.length() < 2 ){ Toast.makeText(getApplicationContext(),'輸入信息不符合要求請(qǐng)重新輸入',Toast.LENGTH_LONG).show(); return;}User user = new User();user.setName(cname);user.setUsername(cusername);user.setPassword(cpassword);user.setAge(cgae);user.setPhone(cphone);new Thread(){ @Override public void run() {String data='';try { data = '&name='+ URLEncoder.encode(user.getName(), 'UTF-8')+ '&username='+ URLEncoder.encode(user.getUsername(), 'UTF-8')+ '&password='+ URLEncoder.encode(user.getPassword(), 'UTF-8')+ '&age='+ URLEncoder.encode(user.getAge()+'', 'UTF-8')+ '&phone='+ URLEncoder.encode(user.getPhone(), 'UTF-8');} catch (UnsupportedEncodingException e) { e.printStackTrace();}String request = PostUtil.Post('RegisterServlet',data);int msg = 0;if(request.equals('成功')){ msg = 2;}//已存在if(request.equals('已存在')){ msg = 1;}hand.sendEmptyMessage(msg); }}.start(); } final Handler hand = new Handler() {@Overridepublic void handleMessage(Message msg) { if(msg.what == 0) {Toast.makeText(getApplicationContext(),'注冊(cè)失敗',Toast.LENGTH_LONG).show(); } if(msg.what == 1) {Toast.makeText(getApplicationContext(),'該賬號(hào)已經(jīng)存在，請(qǐng)換一個(gè)賬號(hào)',Toast.LENGTH_LONG).show(); } if(msg.what == 2) {//startActivity(new Intent(getApplication(),MainActivity.class));Intent intent = new Intent();//將想要傳遞的數(shù)據(jù)用putExtra封裝在intent中intent.putExtra('a','???);setResult(RESULT_CANCELED,intent);finish(); }} };}

到此這篇關(guān)于Android Studio+Servlet+MySql實(shí)現(xiàn)登錄注冊(cè) 的文章就介紹到這了,更多相關(guān)Android Studio 登錄注冊(cè) 內(nèi)容請(qǐng)搜索好吧啦網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持好吧啦網(wǎng)！