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，久久派带你了解更多相关信息。

目录

• 一、Android前端实现
• 二、数据库
• 三、SpringBoot后端搭建
• 四、部署至服务器
• 五、运行测试

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>            <!--Spring Cloud-->            <dependency>                <groupId>org.springframework.cloud</groupId>                <artifactId>spring-cloud-dependencies</artifactId>                <version>Hoxton.RELEASE</version>                <type>pom</type>                <scope>import</scope>            </dependency>            <!--mybatis-plus 持久层-->            <dependency>                <groupId>com.baomidou</groupId>                <artifactId>mybatis-plus-boot-starter</artifactId>                <version>${mybatis-plus.version}</version>            </dependency>            <!-- velocity 模板引擎, Mybatis Plus 代码生成器需要 -->            <dependency>                <groupId>org.apache.velocity</groupId>                <artifactId>velocity-engine-core</artifactId>                <version>${velocity.version}</version>            </dependency>            <!--swagger-->            <dependency>                <groupId>io.springfox</groupId>                <artifactId>springfox-swagger2</artifactId>                <version>${swagger.version}</version>            </dependency>            <!--swagger ui-->            <dependency>                <groupId>io.springfox</groupId>                <artifactId>springfox-swagger-ui</artifactId>                <version>${swagger.version}</version>            </dependency>            <!--日期时间工具-->            <dependency>                <groupId>joda-time</groupId>                <artifactId>joda-time</artifactId>                <version>${jodatime.version}</version>            </dependency>            <!--mysql-->            <dependency>                <groupId>mysql</groupId>                <artifactId>mysql-connector-java</artifactId>            </dependency>            <!--lombok用来简化实体类：需要安装lombok插件-->            <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、prodspring.profiles.active=dev# mysql数据库连接spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driverspring.datasource.url=jdbc:mysql://ip:3310/heartrate?serverTimezone=GMT%2B8&useSSL=falsespring.datasource.username=rootspring.datasource.password=123456#返回json的全局时间格式spring.jackson.date-format=yyyy-MM-dd HH:mm:ssspring.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;@Datapublic 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\";        }    }}

注意：第一个获取所有用户名的方法会发现我自己生成一个实体类，原因是我的数据库表里面有很多字段，但是我在前端展示的时候只能显示几个字段，就是起到保护隐私安全的作用。所以我新建了UserAll类。不影响阅读这些逻辑。

UserAll.java

@Datapublic class UserAll {    private String userName;}

7、运行springboot

这就是全部代码，我们运行之后启动成功。然后打开swagger测试

这里就可以进行接口测试。这里就不进行展示了。

四、部署至服务器

我们使用maven打包。点击package。就可以生成jar包了。

然后上传至服务器。

这里我们就使用 java -jar server-0.0.1-SNAPSHOT.jar 命令运行起来就可以了。

这样就跑起来了。

注意：
这里有一个坑，要看服务器8001的端口有没有开放，否则是不能通过ip访问到的。

firewall-cmd --list-portfirewall-cmd --zone=public --add-port=8001/tcp --permanentfirewall-cmd --reloadfirewall-cmd --query-port=8001/tcp

firewall-cmd --zone=public --remove-port=8001/tcp --permanent  # 删除netstat -anp|grep 8001

然后打开一个接口

五、运行测试

打开AS ,运行APP，打印日志

简单的登录注册基本功能逻辑就已经实现了，大致流程可以走通。接下来就可以继续开发其他了。
注：这里只是最基本的登录注册，还不完善，比如这里密码用户名是明文传送，很容易被抓包，所以这篇花了一点时间做的demo，并不完善，后面会补充完整。

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