我们已经讲过了okhttp和登录系统的使用，我们今天做一个完整的登录系统，后端用spring+mybatis去做
数据库内容
sql
-- 创建学生信息表
CREATE TABLE student_info (
id SERIAL PRIMARY KEY, -- 添加自增主键
name VARCHAR(255) NOT NULL,
number INT NOT NULL,
code INT NOT NULL,
student_id INT UNIQUE NOT NULL, -- 学号唯一
Ptteacher VARCHAR(255),
Zone INT,
grade INT NOT NULL,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP -- 添加创建时间戳
);
-- 插入示例数据
INSERT INTO student_info (name, number, code, student_id, Ptteacher, Zone, grade)
VALUES
('张三', 1001, 2023, 20230001, '王老师', 2, 1),
('李四', 1002, 2023, 20230002, '刘老师', 1, 1),
('王五', 2001, 2022, 20220001, '张老师', 3, 2),
('赵六', 2002, 2022, 20220002, '谢老师', 2, 2), -- 导师可以为空
('钱七', 3001, 2021, 20210001, '陈老师', 1, 3);
-- 查询验证数据
SELECT * FROM student_info;效果图
后端
Student.java
java
package com.example.threes;
public class Student { // 改为更有意义的类名
private Integer id; // 添加主键
private String name;
private Integer number;
private Integer code;
private Integer studentId; // 改为Java命名规范
private String ptTeacher; // 改为Java命名规范
private Integer zone;
private Integer grade;
// 所有getter/setter
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getNumber() {
return number;
}
public void setNumber(Integer number) {
this.number = number;
}
public Integer getCode() {
return code;
}
public void setCode(Integer code) {
this.code = code;
}
public Integer getStudentId() {
return studentId;
}
public void setStudentId(Integer studentId) {
this.studentId = studentId;
}
public String getPtTeacher() {
return ptTeacher;
}
public void setPtTeacher(String ptTeacher) {
this.ptTeacher = ptTeacher;
}
public Integer getZone() {
return zone;
}
public void setZone(Integer zone) {
this.zone = zone;
}
public Integer getGrade() {
return grade;
}
public void setGrade(Integer grade) {
this.grade = grade;
}
}StudentController.java
java
package com.example.threes;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
@RequestMapping("/students")
public class StudentController {
@Autowired
private StudentService studentService;
@GetMapping("/all")
public List<Student> getAllStudents() {
return studentService.getAllStudents();
}
@GetMapping("/search")
public List<Student> getStudentById(
@RequestParam(value = "student_id", required = true) Integer studentId) {
return studentService.getStudentById(studentId);
}
}StudentDao.java
java
package com.example.threes;
import java.util.List;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface StudentDao { // 接口改名
List<Student> findAll();
List<Student> findByStudentId(Integer studentId); // 单一查询方法
// 删除其他不相关的方法
}StudentService.java
java
package com.example.threes;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class StudentService {
@Autowired
private StudentDao studentDao;
public List<Student> getAllStudents(){
return studentDao.findAll();
}
public List<Student> getStudentById(Integer studentId){
return studentDao.findByStudentId(studentId);
}
}Student.xml
xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.threes.StudentDao"> <!-- 更新为正确的接口名 -->
<!-- 结果映射 -->
<resultMap id="studentResultMap" type="com.example.threes.Student">
<id property="id" column="id"/>
<result property="name" column="name"/>
<result property="number" column="number"/>
<result property="code" column="code"/>
<result property="studentId" column="student_id"/>
<result property="ptTeacher" column="ptteacher"/>
<result property="zone" column="zone"/>
<result property="grade" column="grade"/>
</resultMap>
<!-- 查询所有学生 -->
<select id="findAll" resultMap="studentResultMap">
SELECT * FROM student_info
</select>
<!-- 按student_id查询 -->
<select id="findByStudentId" resultMap="studentResultMap" parameterType="int">
SELECT * FROM student_info
WHERE student_id = #{studentId}
</select>
</mapper>效果图
客户端
student.java
java
package com.example.project_a.Information;
public class Student {
public String name;
public int number;
public int code;
public int student_id;
public String Ptteacher;
public int Zone;
public int grade;
//学生的必要信息，可从数据库中修改
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
// number 属性的getter和setter
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
// code 属性的getter和setter
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
// student_id 属性的getter和setter
public int getStudent_id() {
return student_id;
}
public void setStudent_id(int student_id) {
this.student_id = student_id;
}
// Ptteacher 属性的getter和setter
public String getPtteacher() {
return Ptteacher;
}
public void setPtteacher(String Ptteacher) {
this.Ptteacher = Ptteacher;
}
// Zone 属性的getter和setter
public int getZone() {
return Zone;
}
public void setZone(int Zone) {
this.Zone = Zone;
}
// grade 属性的getter和setter
public int getGrade() {
return grade;
}
public void setGrade(int grade) {
this.grade = grade;
}
}Stu_Login_Activity.java
java
package com.example.project_a;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.Manifest;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.text.method.TransformationMethod;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.example.project_a.Information.Student;
import com.example.project_a.tools.PermissionsInfo;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.HttpUrl;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import pub.devrel.easypermissions.AfterPermissionGranted;
import pub.devrel.easypermissions.EasyPermissions;
public class Stu_Login_Activity extends AppCompatActivity {
// 控件声明
private EditText mEtUsername;
private EditText mEtPassword;
private Button mBtnLogin;
private Button mBtnFound;
private ImageView mImgEye;
private CheckBox mChbRemember;
private TextView tv_result;
private CheckBox mChbAutoLogin;
// 额外声明
private SharedPreferences loginPreferences;
// Student对象作为成员变量
private Student student;
private boolean studentDataLoaded = false;
// 常量定义
private static String strUsername = "1";
private static String strPassword = "1";
private static boolean hide = true;
private static String CheckOrNot = "checked";
private static String UserName = "UserName";
private static String PassWord = "PassWord";
private boolean isNetworkVerificationInProgress = false; // 新增标志位
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_stu_login);
checkingAndroidVersion(); // 检查安卓版本
// 初始化Student对象
student = new Student();
// 控件绑定
mEtUsername = findViewById(R.id.ed_stuLogin_username);
mEtPassword = findViewById(R.id.et_stuLogin_Password);
mBtnLogin = findViewById(R.id.btn_stuLogin_login);
mBtnFound = findViewById(R.id.btn_stuLogin_find);
mImgEye = findViewById(R.id.img_stuLogin_eye);
mChbRemember = findViewById(R.id.cb_stuLogin_remember);
mChbAutoLogin = findViewById(R.id.cb_stuLogin_autologin);
tv_result = findViewById(R.id.tv_result); // 确保有这个TextView
loginPreferences = getSharedPreferences("Login_stu", MODE_PRIVATE);
boolean checked = loginPreferences.getBoolean(CheckOrNot, false);
if (checked) {
Map<String, String> map = readLogin();
if (map != null) {
mEtUsername.setText(map.get(UserName).toString());
mEtPassword.setText(map.get(PassWord).toString());
mChbRemember.setChecked(checked);
}
}
// 功能实现
// 登录
mBtnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 读取是否保存了密码
configLoginInfo(mChbRemember.isChecked());
// 防止重复点击
if (isNetworkVerificationInProgress) {
return;
}
// 正常登录
if (onCheck(v)) {
Intent intent = new Intent(Stu_Login_Activity.this, Activity_Student_Homepage.class);
startActivity(intent);
}
}
});
// 跳转到网页
mBtnFound.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Uri uri = Uri.parse("http://www.bing.com"); // 账户找回url修改位置
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}
});
// 密码显示与否设置
mImgEye.setImageResource(R.drawable.invisible);
mImgEye.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (v.getId() == R.id.img_stuLogin_eye) {
if (hide == true) {
mImgEye.setImageResource(R.drawable.visible);
HideReturnsTransformationMethod method = HideReturnsTransformationMethod.getInstance();
mEtPassword.setTransformationMethod(method);
hide = false;
} else if (hide == false) {
mImgEye.setImageResource(R.drawable.invisible);
TransformationMethod method = PasswordTransformationMethod.getInstance();
mEtPassword.setTransformationMethod(method);
hide = true;
}
}
}
});
}
// 发起GET方式的HTTP请求
private void doGet() {
isNetworkVerificationInProgress = true; // 设置网络验证开始标志
final String username = mEtUsername.getText().toString().trim();
if (username.isEmpty()) {
runOnUiThread(() -> {
Toast.makeText(Stu_Login_Activity.this, "用户名不能为空", Toast.LENGTH_SHORT).show();
isNetworkVerificationInProgress = false;
});
return;
}
// 1. 构建带参数的URL
HttpUrl url = new HttpUrl.Builder()
.scheme("http")
.host("192.168.43.9") // 替换为实际IP
.port(8080)
.addPathSegments("students/search") // 层级路径的正确写法
.addQueryParameter("student_id", username) // 查询参数 - 使用真实的用户名
.build();
OkHttpClient client = new OkHttpClient.Builder()
.connectTimeout(15, TimeUnit.SECONDS) // 添加超时配置
.readTimeout(20, TimeUnit.SECONDS)
.build();
Request request = new Request.Builder()
.url(url)
.header("Accept-Language", "zh-CN")
.build();
runOnUiThread(() -> Toast.makeText(Stu_Login_Activity.this, "正在验证账号...", Toast.LENGTH_SHORT).show());
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
runOnUiThread(() -> {
Toast.makeText(Stu_Login_Activity.this, "网络请求失败: " + e.getMessage(), Toast.LENGTH_SHORT).show();
tv_result.setText("请求失败: " + e.getMessage());
isNetworkVerificationInProgress = false;
});
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
String resp = response.body().string();
try {
JSONArray jsonArray = new JSONArray(resp);
// 检查是否有数据
if (jsonArray.length() > 0) {
// 只取第一组学生数据
JSONObject jsonObject = jsonArray.getJSONObject(0);
// 填充Student对象数据
student.name = jsonObject.optString("name", "未知");
student.number = jsonObject.optInt("number", 0);
student.code = jsonObject.optInt("code", 0);
student.student_id = jsonObject.optInt("studentId", 0);
student.Ptteacher = jsonObject.optString("ptTeacher", "未知");
student.Zone = jsonObject.optInt("zone", 0);
student.grade = jsonObject.optInt("grade", 0);
// 标记数据已加载
studentDataLoaded = true;
// 在UI线程中完成密码验证
runOnUiThread(() -> {
// 获取用户输入的密码
String password = mEtPassword.getText().toString().trim();
// 验证服务器返回的code是否与密码匹配
if (password.equals(String.valueOf(student.code))) {
Toast.makeText(Stu_Login_Activity.this, "登录成功！", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Stu_Login_Activity.this, Activity_Student_Homepage.class);
startActivity(intent);
} else {
Toast.makeText(Stu_Login_Activity.this, "密码错误", Toast.LENGTH_SHORT).show();
}
isNetworkVerificationInProgress = false; // 重置网络验证标志
});
} else {
runOnUiThread(() -> {
Toast.makeText(Stu_Login_Activity.this, "未找到学生信息", Toast.LENGTH_SHORT).show();
tv_result.setText("未找到学生信息");
isNetworkVerificationInProgress = false;
});
}
} catch (JSONException e) {
runOnUiThread(() -> {
Toast.makeText(Stu_Login_Activity.this, "JSON解析失败", Toast.LENGTH_SHORT).show();
tv_result.setText("JSON解析失败\n原始数据：" + resp);
isNetworkVerificationInProgress = false;
});
}
} else {
runOnUiThread(() -> {
Toast.makeText(Stu_Login_Activity.this, "服务器返回错误: " + response.code(), Toast.LENGTH_SHORT).show();
tv_result.setText("服务器返回错误\n状态码：" + response.code());
isNetworkVerificationInProgress = false;
});
}
response.close(); // 确保关闭响应资源
}
});
}
/*onCheck确认密码事件*/
private boolean onCheck(View v) {
// 需要获取输入的用户名和密码
String username = mEtUsername.getText().toString();
String password = mEtPassword.getText().toString();
// 弹出内容设置
String ok = "登陆成功！";
String fail = "密码或用户名有误，登陆失败。";
// 1. 检查本地测试账号（特殊硬编码账号）
if (username.equals(strUsername) && password.equals(strPassword)) {
Toast.makeText(getApplicationContext(), ok, Toast.LENGTH_SHORT).show();
return true;
}
// 2. 检查是否已加载学生数据（网络验证已成功且加载过数据）
if (studentDataLoaded && password.equals(String.valueOf(student.code))) {
Toast.makeText(getApplicationContext(), ok, Toast.LENGTH_SHORT).show();
return true;
}
// 3. 尝试网络验证
doGet();
Toast toastCenter = Toast.makeText(Stu_Login_Activity.this, "正在验证账号...", Toast.LENGTH_SHORT);
toastCenter.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0);
toastCenter.show();
return false; // 返回false，等待网络验证回调处理登录结果
}
/*保存密码*/
private void configLoginInfo(boolean checked) {
SharedPreferences.Editor editor = loginPreferences.edit();
editor.putBoolean(CheckOrNot, mChbRemember.isChecked());
if (checked) {
editor.putString(UserName, mEtUsername.getText().toString());
editor.putString(PassWord, mEtPassword.getText().toString());
} else {
editor.remove(UserName).remove(PassWord);
}
editor.commit();
}
/*登录临时信息读取*/
private Map<String, String> readLogin() {
Map<String, String> map = new HashMap<>();
String username = loginPreferences.getString(UserName, "");
String password = loginPreferences.getString(PassWord, "");
map.put(UserName, username);
map.put(PassWord, password);
return map;
}
// PermissionInfo
private static final int REQUEST_PERMISSIONS = 9527;
public void checkingAndroidVersion() {
Toast toastCenter = Toast.makeText(getApplicationContext(), "当前安卓版本为" + Build.VERSION.SDK_INT, Toast.LENGTH_SHORT);
toastCenter.show();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// Android6.0及以上先获取权限再定位
requestPermission();
} else {
// Android6.0以下直接定位
Toast toastCenter1 = Toast.makeText(getApplicationContext(), "ok", Toast.LENGTH_SHORT);
toastCenter1.show();
}
}
@AfterPermissionGranted(REQUEST_PERMISSIONS)
public void requestPermission() {
String[] permissions = {
android.Manifest.permission.ACCESS_COARSE_LOCATION,
android.Manifest.permission.ACCESS_FINE_LOCATION,
android.Manifest.permission.READ_PHONE_STATE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
if (EasyPermissions.hasPermissions(this, permissions)) {
// true 有权限 开始定位
Toast info = Toast.makeText(getApplicationContext(), "已获得权限，可以定位啦！", Toast.LENGTH_SHORT);
info.show();
} else {
// false 无权限
EasyPermissions.requestPermissions(this, "需要权限", REQUEST_PERMISSIONS, permissions);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
// 设置权限请求结果
EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}
}stu_log.xml
xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".Stu_Login_Activity">
<ImageView
android:layout_width="64dp"
android:layout_height="64dp"
android:src="@drawable/kids"
android:layout_marginTop="200dp"
android:layout_gravity="center_horizontal"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="学 生 登 录 界 面"
android:layout_marginTop="10dp"
android:gravity="center_horizontal"
android:layout_gravity="center_horizontal"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="65dp"
android:layout_gravity="center_horizontal">
<EditText
android:id="@+id/ed_stuLogin_username"
android:layout_width="350dp"
android:layout_height="48dp"
android:layout_gravity="center"
android:hint="Username"
android:maxLines="1"
android:textSize="16sp"/>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<EditText
android:id="@+id/et_stuLogin_Password"
android:layout_width="350dp"
android:layout_height="48dp"
android:layout_marginTop="6dp"
android:layout_gravity="center_horizontal"
android:hint="Password"
android:inputType="textPassword"
android:maxLines="1"
android:textSize="16sp"/>
<ImageView
android:id="@+id/img_stuLogin_eye"
android:layout_width="32dp"
android:layout_height="32dp"
android:layout_alignBottom="@+id/et_stuLogin_Password"
android:layout_alignEnd="@+id/et_stuLogin_Password"
android:layout_alignTop="@+id/et_stuLogin_Password"
android:src="@drawable/invisible"/>
</RelativeLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center_horizontal">
<CheckBox
android:id="@+id/cb_stuLogin_remember"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="记住密码"
android:textSize="13sp"/>
<CheckBox
android:id="@+id/cb_stuLogin_autologin"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="自动登录"
android:textSize="13sp"
android:layout_marginLeft="76dp"/>
</LinearLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal">
<Button
android:id="@+id/btn_stuLogin_login"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="Login"
android:textSize="17sp"/>
<Button
android:id="@+id/btn_stuLogin_find"
android:layout_width="95dp"
android:layout_height="wrap_content"
android:text="found"
android:textSize="17sp"
android:layout_toRightOf="@id/btn_stuLogin_login"
android:layout_marginLeft="5dp"/>
</RelativeLayout>
<TextView
android:id="@+id/tv_result"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="5dp"
android:textColor="@color/black"
android:textSize="17sp" />
</LinearLayout>之后我们通过数据库中的student_id和code来进行登录，同时还要保证网络连接的相同，就可以正常连接了。
