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

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'> <EditTextandroid: 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' /> <EditTextandroid: 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' /> <Buttonandroid: 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' /> <Buttonandroid: 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' /> <Buttonandroid: 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' /> <applicationandroid: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。

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:LaboratoryCodeserviceserver' + '/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Igc.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.javaR.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userNamewrapper.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 MD5if(!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。

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

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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