位置：首页>> 软件编程>> Android编程>> Android使用OKhttp3实现登录注册功能+springboot搭建后端的详细过程

Android使用OKhttp3实现登录注册功能+springboot搭建后端的详细过程

作者：hequnwang10　　发布时间：2022-07-07 15:07:56　

标签：Android,springboot,OKhttp3

一、Android前端实现

新建一个login的项目，主要的几个文件在这里

1、gradle引入OKhttp3依赖

implementation 'com.squareup.okhttp3:okhttp:3.14.7'
implementation 'com.squareup.okio:okio:1.17.5'

2、activity_main.xml布局文件

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<EditText
android:id="@+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="用户名"
android:textSize="34sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.051" />
<EditText
android:id="@+id/password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="密码"
android:textSize="34sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/username"
app:layout_constraintVertical_bias="0.067" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="register"
android:text="注册"
android:textSize="24sp"
app:backgroundTint="#E91E63"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.501"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/password"
app:layout_constraintVertical_bias="0.058" />
<Button
android:id="@+id/getUser"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="getUser"
android:text="获取"
android:textSize="24sp"
app:backgroundTint="#E91E63"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.501"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button3"
app:layout_constraintVertical_bias="0.174" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="登录"
android:textSize="24sp"
app:backgroundTint="#E91E63"
android:onClick="login"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.501"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button"
app:layout_constraintVertical_bias="0.113" />
</androidx.constraintlayout.widget.ConstraintLayout>

3、AndroidManifest.xml配置文件

这里需要加上网络请求权限，添加网络权限的时候注意：在res目录下新建xml目录，创建network_security_config.xml文件

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<base-config cleartextTrafficPermitted="true" />
</network-security-config>

并在配置文件中加入这行代码：

android:networkSecurityConfig="@xml/network_security_config"

完整的AndroidManifest.xml文件如下

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.login">

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:networkSecurityConfig="@xml/network_security_config"
android:supportsRtl="true"
android:theme="@style/Theme.Login">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

4、创建User实体类

新建entity目录创建User实体类。注意这里我是根据后端数据库的字段创建的，在实现登录注册的时候只需要id,username,password 几个基础的字段就行，这里我比较多，读者可以自行忽略。
User.java

package com.example.login.entity;
public class User {
private Integer userId;
private String userName;
private String userPassword;
private String currentVersion;
private String latestVersion;
private String updateDescription;
private String headPortrait;
private String nickName;
private String vipTime;
private String userCategory;
private String registerDate;

public User(Integer userId, String userName, String userPassword, String currentVersion, String latestVersion, String updateDescription, String headPortrait, String nickName, String vipTime, String userCategory, String registerDate) {
this.userId = userId;
this.userName = userName;
this.userPassword = userPassword;
this.currentVersion = currentVersion;
this.latestVersion = latestVersion;
this.updateDescription = updateDescription;
this.headPortrait = headPortrait;
this.nickName = nickName;
this.vipTime = vipTime;
this.userCategory = userCategory;
this.registerDate = registerDate;
}

public User() {
}

public Integer getUserId() {
return userId;
}

public void setUserId(Integer userId) {
this.userId = userId;
}

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public String getUserPassword() {
return userPassword;
}

public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}

public String getCurrentVersion() {
return currentVersion;
}

public void setCurrentVersion(String currentVersion) {
this.currentVersion = currentVersion;
}

public String getLatestVersion() {
return latestVersion;
}

public void setLatestVersion(String latestVersion) {
this.latestVersion = latestVersion;
}

public String getUpdateDescription() {
return updateDescription;
}

public void setUpdateDescription(String updateDescription) {
this.updateDescription = updateDescription;
}

public String getHeadPortrait() {
return headPortrait;
}

public void setHeadPortrait(String headPortrait) {
this.headPortrait = headPortrait;
}

public String getNickName() {
return nickName;
}

public void setNickName(String nickName) {
this.nickName = nickName;
}

public String getVipTime() {
return vipTime;
}

public void setVipTime(String vipTime) {
this.vipTime = vipTime;
}

public String getUserCategory() {
return userCategory;
}

public void setUserCategory(String userCategory) {
this.userCategory = userCategory;
}

public String getRegisterDate() {
return registerDate;
}

public void setRegisterDate(String registerDate) {
this.registerDate = registerDate;
}
}

LoginUser.java

public class LoginUser {
private String userName;
private String userPassword;

public LoginUser(String userName, String userPassword) {
this.userName = userName;
this.userPassword = userPassword;
}

public LoginUser() {
}

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public String getUserPassword() {
return userPassword;
}

public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
}

5、MainActivity.java

package com.example.login;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.example.login.entity.User;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class MainActivity extends AppCompatActivity {
private EditText username;
private EditText password;
private User user;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = findViewById(R.id.username);
password = findViewById(R.id.password);

}

public void register(View view) {
user = new User();
user.setUserName(username.getText().toString());
user.setUserPassword(password.getText().toString());
Log.d("whqusername",username.getText().toString());
Log.d("whqpassword",password.getText().toString());
new Thread(new Runnable() {
@Override
public void run() {
MediaType JSON = MediaType.parse("application/json;charset=utf-8");
JSONObject jsonObject = new JSONObject();
OkHttpClient httpClient = new OkHttpClient();
try {
jsonObject.put("userId",10);
jsonObject.put("userName",user.getUserName());
jsonObject.put("userPassword",user.getUserPassword());
jsonObject.put("currentVersion",null);
jsonObject.put("latestVersion",null);
jsonObject.put("updateDescription",null);
jsonObject.put("headPortrait",null);
jsonObject.put("nickName",user.getUserName());
jsonObject.put("vipTime",null);
jsonObject.put("userCategory",null);
jsonObject.put("registerDate",null);
} catch (JSONException e) {
e.printStackTrace();
}
RequestBody requestBody = RequestBody.create(JSON, String.valueOf(jsonObject));
String url = "http://ip:8001/server/user/addUser/";
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.build();

Call call = httpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.d("whq","失败了");
}

@Override
public void onResponse(Call call, Response response) throws IOException {
Log.d("whq",response.toString()+"------------------");
Log.d("whq",response.body().toString()+"------------------");

}
});

}
}).start();
}

public void getUser(View view) {
OkHttpClient httpClient = new OkHttpClient();

String url = "http://ip:8001/server/user/getAllUserName";
Request getRequest = new Request.Builder()
.url(url)
.get()
.build();

Call call = httpClient.newCall(getRequest);

new Thread(new Runnable() {
@Override
public void run() {
try {
//同步请求，要放到子线程执行
Response response = call.execute();
Log.i("whq+getAllUserName", "okHttpGet run: response:"+ response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();

}

public void login(View view) {
loginUser = new LoginUser();
loginUser.setUserName(username.getText().toString());
loginUser.setUserPassword(password.getText().toString());
new Thread(new Runnable() {
@Override
public void run() {
MediaType JSON = MediaType.parse("application/json;charset=utf-8");
JSONObject jsonObject = new JSONObject();
OkHttpClient httpClient = new OkHttpClient();
try {
jsonObject.put("userName",loginUser.getUserName());
jsonObject.put("userPassword",MD5.encrypt(loginUser.getUserPassword()));
} catch (JSONException e) {
e.printStackTrace();
}
RequestBody requestBody = RequestBody.create(JSON, String.valueOf(jsonObject));
String url = "http://ip:8001/server/user/login";
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.build();

Call call = httpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.d("whq登录","失败了");
}

@Override
public void onResponse(Call call, Response response) throws IOException {
String MyResult = response.body().string();
Log.d("whq登录",response+"---------response---------");
Log.d("whq登录",response.message()+"---------message---------");
Log.d("whq登录",response.body().toString()+"------------------");
Log.d("whq登录",MyResult+"-----------MyResult-------");
}
});
}
}).start();
}
}

到这里就实现了Android的前端实现。

二、数据库

数据库就是简单的一个user表

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`userId` int(11) NOT NULL AUTO_INCREMENT,
`userName` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`userPassword` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`currentVersion` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`latestVersion` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`updateDescription` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`headPortrait` mediumblob NULL,
`nickName` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`vipTime` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`userCategory` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT 'normal',
`registerDate` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
PRIMARY KEY (`userId`, `userName`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 13 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC;

SET FOREIGN_KEY_CHECKS = 1;

三、SpringBoot后端搭建

后端搭建用到的是SSM框架

1、新建一个springboot项目，添加依赖

pom.xml文件。这里有mybatis-plus+swagger+velocity，使用了代码生成器

<properties>
<java.version>1.8</java.version>
<mybatis-plus.version>3.0.5</mybatis-plus.version>
<swagger.version>2.7.0</swagger.version>
<jodatime.version>2.10.1</jodatime.version>
<poi.version>3.17</poi.version>
<httpclient.version>4.5.1</httpclient.version>
<gson.version>2.8.2</gson.version>
<velocity.version>2.0</velocity.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>


<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>

<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>${mybatis-plus.version}</version>
</dependency>


<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>${velocity.version}</version>
</dependency>


<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>${swagger.version}</version>
</dependency>

<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${swagger.version}</version>
</dependency>

<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>${jodatime.version}</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>

2、application.properties文件

# 服务端口
server.port=8001
# 服务名
spring.application.name=heartrate

# 环境设置：dev、test、prod
spring.profiles.active=dev

# mysql数据库连接
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://ip:3310/heartrate?serverTimezone=GMT％2B8&useSSL=false
spring.datasource.username=root
spring.datasource.password=123456

#返回json的全局时间格式
spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8

##mybatis日志//要使用logback日志，就需要注释掉
#mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

#配置mapper xml文件的路径
mybatis-plus.mapper-locations=classpath:com/atguigu/eduservice/mapper/xml/*.xml

这里的数据库连接发现我是使用3310端口，因为我的服务器是使用docker创建数据库的。请自行查看我之前的文章。

3、CodeGenerator.java代码生成器

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import org.junit.Test;

/**
* @author ahuwhq
* @since 2021/7/27
*/
public class CodeGenerator {

@Test
public void run() {

// 1、创建代码生成器
AutoGenerator mpg = new AutoGenerator();

// 2、全局配置
GlobalConfig gc = new GlobalConfig();
String projectPath = System.getProperty("user.dir");
//这里改成自己的目录
gc.setOutputDir("E:\\LaboratoryCode\\service\\server" + "/src/main/java");
gc.setAuthor("ahuwhq");
gc.setOpen(false); //生成后是否打开资源管理器
gc.setFileOverride(false); //重新生成时文件是否覆盖
gc.setServiceName("％sService");//去掉Service接口的首字母I
gc.setIdType(IdType.ID_WORKER_STR); //主键策略
gc.setDateType(DateType.ONLY_DATE);//定义生成的实体类中日期类型
gc.setSwagger2(true);//开启Swagger2模式

mpg.setGlobalConfig(gc);

// 3、数据源配置
DataSourceConfig dsc = new DataSourceConfig();
//这里的数据库改为自己的
dsc.setUrl("jdbc:mysql://ip:3310/heartrate?serverTimezone=GMT％2B8");
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("123456");
dsc.setDbType(DbType.MYSQL);
mpg.setDataSource(dsc);

// 4、包配置
PackageConfig pc = new PackageConfig();
pc.setParent("com.message");
pc.setModuleName("server"); //模块名

pc.setController("controller");
pc.setEntity("entity");
pc.setService("service");
pc.setMapper("mapper");
mpg.setPackageInfo(pc);

// 5、策略配置
StrategyConfig strategy = new StrategyConfig();
//这里是对应的数据库的表
strategy.setInclude("user");
strategy.setNaming(NamingStrategy.underline_to_camel);//数据库表映射到实体的命名策略
strategy.setTablePrefix(pc.getModuleName() + "_"); //生成实体时去掉表前缀

strategy.setColumnNaming(NamingStrategy.underline_to_camel);//数据库表字段映射到实体的命名策略
strategy.setEntityLombokModel(true); // lombok 模型 @Accessors(chain = true) setter链式操作

strategy.setRestControllerStyle(true); //restful api风格控制器
strategy.setControllerMappingHyphenStyle(true); //url中驼峰转连字符

mpg.setStrategy(strategy);

// 6、执行
mpg.execute();
}
}

点击运行就会自动生成文件

4、添加config目录

这里的config目录代码生成器没有帮我们生成，我们添加这个目录主要是想使用swagger测试（SwaggerConfig），并且代码生成器生成文件之后，我们需要配置一下能扫描到mapper文件（ServerConfig）

ServerConfig.java

package com.message.server.config;

import com.baomidou.mybatisplus.core.injector.ISqlInjector;
import com.baomidou.mybatisplus.extension.injector.LogicSqlInjector;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@MapperScan("com.message.server.mapper")
public class ServerConfig {

/**
* 逻辑删除插件
*/
@Bean
public ISqlInjector sqlInjector() {
return new LogicSqlInjector();
}

/**
* 分页插件
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
return new PaginationInterceptor();
}
}

SwaggerConfig.java

import com.google.common.base.Predicates;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration//配置类
@EnableSwagger2//swagger2注解
public class SwaggerConfig {
@Bean
public Docket webApiConfig(){
return new Docket(DocumentationType.SWAGGER_2)
.groupName("webApi")
.apiInfo(webApiInfo())
.select()
// .paths(Predicates.not(PathSelectors.regex("/admin/.*")))
.paths(Predicates.not(PathSelectors.regex("/error.*")))
.build();

}
private ApiInfo webApiInfo(){

return new ApiInfoBuilder()
.title("网站-课程中心API文档")
.description("本文档描述了课程中心微服务接口定义")
.version("1.0")
.contact(new Contact("java", "http://ahuwhq.com", "ahuwhq@163.com"))
.build();
}
}

5、Controller层实现 UserController.java

这里我实现了好多种方法，不仅是登录注册，但是Android前段我们只用到登录注册和获取全部用户

import com.message.server.entity.User;
import com.message.server.entity.vo.UserAll;
import com.message.server.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;
/**
* <p>
* 前端控制器
* </p>
*
* @author ahuwhq
* @since 2021-07-27
*/
@RestController
@RequestMapping("/server/user")
public class UserController {
//访问地址：http://ip:8001/server/user/findAll 最终部署到服务器时使用这个来访问
//访问地址：http://localhost:8001/server/user/findAll 这是本地测试地址也是Swagger地址
@Autowired
private UserService userService;

/**
* 查询所有的用户
* @return
*/
@GetMapping("getAllUsers")
public List<User> findAllUser(){
//调用方法查询
List<User> list = userService.list(null);
return list;
}

/**
* 添加用户,注册功能
* @param user
* @return
*/
@PostMapping("addUser")
public Boolean addUser(@RequestBody User user){
boolean save = userService.save(user);
return save;

}

/**
* 获取所有用户名
*/
@GetMapping("getAllUserName")
public List<UserAll> getAllUserName(){
List<UserAll> userNamelist = userService.getAllUserName();
return userNamelist;
}

/**
* 根据用户ID查询用户的昵称
* @param id
* @return
*/
@GetMapping("getUserNickname/{id}")
public String getUserNickname(@PathVariable Integer id){
User user = userService.getById(id);
String nickName = user.getNickName();
return nickName;
}

/**
*修改密码
* @param userName
* @return
*/
@PostMapping("changePassword/{userName}/{password}")
public Boolean changePassword(@PathVariable String userName,
@PathVariable String password){
Boolean result = userService.changePassword(userName,password);
return result;
}

/**
* 用户的登录功能PostMapping
* @param loginuser
* @return
*/
@PostMapping("login")
public R login(@RequestBody loginUser loginuser){
String token = userService.login(loginuser);
if (token == "wrong Password"){
return R.error().data("result",token);
}else{
return R.ok().data("result",token);
}
}
}

这里用到了几个文件R.java，ResultCode.java,MyException.java
R.java

//统一返回结果

import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

import java.util.HashMap;
import java.util.Map;

@Data
public class R {
@ApiModelProperty(value = "是否成功")
private Boolean success;

@ApiModelProperty(value = "返回码")
private Integer code;

@ApiModelProperty(value = "返回消息")
private String message;

@ApiModelProperty(value = "返回数据")
private Map<String, Object> data = new HashMap<String, Object>();

//构造方法私有化
private R(){}

//链式编程
//成功静态方法

public static R ok(){
R r = new R();
r.setSuccess(true);
r.setCode(ResultCode.SUCCESS);
r.setMessage("成功");
return r;
}

//失败静态方法
public static R error(){
R r = new R();
r.setSuccess(false);
r.setCode(ResultCode.ERROR);
r.setMessage("失败");
return r;
}

public R success(Boolean success){
this.setSuccess(success);
return this;
}

public R message(String message){
this.setMessage(message);
return this;
}

public R code(Integer code){
this.setCode(code);
return this;
}

public R data(String key, Object value){
this.data.put(key, value);
return this;
}

public R data(Map<String, Object> map){
this.setData(map);
return this;
}

}

ResultCode.java

public interface ResultCode {

public static Integer SUCCESS = 20000;//成功

public static Integer ERROR = 20001;//失败
}

MyException.java

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor//生成有参构造方法
@NoArgsConstructor//生成无参构造方法
public class MyException extends RuntimeException{

private Integer code;//状态码

private String msg;//异常信息
}

5、UserService接口

public interface UserService extends IService<User> {

/**
* 获取所有用户名
* @return
*/
List<UserAll> getAllUserName();

/**
* 修改密码
* @param userName
* @return
*/
Boolean changePassword(String userName,String password);

/**
* 用户的登录功能
* @param userName
* @param password
* @return
*/
Boolean login(String userName, String password);
}

6、UserServiceImpl.java

public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

@Autowired
private UserService userService;

/**
* 获取所有用户名
*/
@Override
public List<UserAll> getAllUserName() {

//创建一个构造器
QueryWrapper<User> wrapper = new QueryWrapper<>();
//查询所有的userName
wrapper.eq("userName",0);
//重新封装一个UserAll的类，专门来查询所有用户名
List<User> users = baseMapper.selectList(wrapper);

List<UserAll> userAlls = new ArrayList<>();
for (int i = 0; i < users.size(); i++) {
User user = users.get(i);
String userName = user.getUserName();
UserAll userAll = new UserAll();
userAll.setUserName(userName);
userAlls.add(userAll);
}
return userAlls ;
}

/**
* 修改密码
* @param userName
* @param password
* @return
*/
@Override
public Boolean changePassword(String userName,String password) {
QueryWrapper<User> wrapper = new QueryWrapper<>();
wrapper.eq("userName",userName);
User user = baseMapper.selectOne(wrapper);
if (user == null){
return false;
}
user.setUserPassword(password);
boolean save = userService.update(user,null);
return save;
}

/**
* 用户的登录功能PostMapping
* @param loginuser
* @return
*/
@Override
public String login(loginUser loginuser) {
String userName = loginuser.getUserName();
String userPassword = loginuser.getUserPassword();
//用户名和密码非空判断
if(org.springframework.util.StringUtils.isEmpty(userName) || org.springframework.util.StringUtils.isEmpty(userPassword)) {
return "wrong Password";
}
//判断手机号是否正确
QueryWrapper<User> wrapper = new QueryWrapper<>();
wrapper.eq("userName",userName);
User user = baseMapper.selectOne(wrapper);
//判断密码
//因为存储到数据库密码肯定加密的
//把输入的密码进行加密，再和数据库密码进行比较
//加密方式 MD5
if(!userPassword.equals(user.getUserPassword())) {
return "wrong Password";

}
else {
return "success login";
}
}
}