一、引言
作者将代码上传到了Gitee，小伙伴可以直接Clone项目到本地
项目地址：https://gitee.com/cai-zijing/SpringBoot_MongoDB_Login.git
再分享给大家一个非常好用的插件Gitee，主要功能为在IDEAL中与远程仓库进行可视化交互
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输入项目地址一步解决项目克隆
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二、项目结构
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三、代码
3.1 pom.xml依赖
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.7.4</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.bcn</groupId> <artifactId>SpringBoot_MongoDB_Login</artifactId> <version>0.0.1-SNAPSHOT</version> <name>SpringBoot_MongoDB_Login</name> <description>SpringBoot_MongoDB_Login</description> <properties> <java.version>17</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>
3.2 applicaiton.yml配置文件
因人喜好是否将application.propertie重命名为application.yml
server: port: 8900 servlet: encoding: charset: utf-8 enabled: true spring: data: mongodb: uri: mongodb://root:123456@localhost:27017/login?maxIdleTimeMS=86400000 port: 27017
3.3 User实体类
@Data各个属性getter、setter等方法
@AllArgsConstructor有参构造函数
@NoArgsConstructor无参构造函数
@Document(collection = "user")对应数据库中的集合
package com.bcn.springboot_mongodb_login.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import org.springframework.data.annotation.Id; import org.springframework.data.mongodb.core.mapping.Document; /** * @author 大白菜 * @date Created in 2022/10/12 8:48 */ @Data @AllArgsConstructor @NoArgsConstructor @Document(collection = "user") public class User { @Id private String id; private String username; private String password; public User(String username, String password) { this.username = username; this.password = password; } }
3.4 UserMapper接口层
@Repository SpringBoot数据访问层标志
MongoRepository<User,Long> 第一个参数User为对应实体类对象，Long为User的主键类型
MongoRepository是模板类，使用该类后很多方法可以直接获取，只需要定义好Restful风格函数名即可，类似于Mybatis_plus和JPA
package com.bcn.springboot_mongodb_login.mapper; import com.bcn.springboot_mongodb_login.pojo.User; import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.stereotype.Repository; /** * @author 大白菜 * @date Created in 2022/10/12 9:34 */ @Repository public interface UserMapper extends MongoRepository<User,String> { User findByUsername(String username); }
3.5 UserService业务接口层
当业务需求较为简单时，该层可舍弃，只用ServiceImpl即可
package com.bcn.springboot_mongodb_login.service; import com.bcn.springboot_mongodb_login.pojo.User; /** * @author 大白菜 * @date Created in 2022/10/12 10:18 */ public interface UserService { String loginService(String username,String password); String registerService(User user); }
3.6 UserServiceImpl业务层
@Service 业务层标志
package com.bcn.springboot_mongodb_login.service.Impl; import com.bcn.springboot_mongodb_login.mapper.UserMapper; import com.bcn.springboot_mongodb_login.pojo.User; import com.bcn.springboot_mongodb_login.service.UserService; import org.springframework.stereotype.Service; import javax.annotation.Resource; /** * @author 大白菜 * @date Created in 2022/10/12 10:19 */ @Service public class UserServiceImpl implements UserService { @Resource private UserMapper userMapper; @Override public String loginService(String username, String password) { User user = userMapper.findByUsername(username); if (user == null) { return "用户不存在"; } else { if (password.equals(user.getPassword())) { return "SUCCESS"; } else { return "用户密码错误"; } } } @Override public String registerService(User user) { String tempUnm = user.getUsername(); User tempUser = userMapper.findByUsername(tempUnm); if (tempUser != null) { return "用户已存在"; } else { userMapper.save(user); return "SUCCESS"; } } }
3.7 UserController控制层
@SuppressWarnings({"all"}) 控制台输出过滤掉警告信息
@RestController控制层标志，等价于@Controller+@ResponseBody
@RequestMapping() 对外接口地址
package com.bcn.login_mybatis_demo.controller; import com.bcn.login_mybatis_demo.pojo.User; import com.bcn.login_mybatis_demo.service.serviceImpl.UserServiceImpl; import com.bcn.login_mybatis_demo.util.Result; import com.bcn.login_mybatis_demo.util.ResultUtil; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; /** * @author 大白菜 * @date Created in 2022/9/26 14:56 */ @SuppressWarnings({"all"}) @RestController @RequestMapping("/user") public class UserController { @Autowired UserServiceImpl userServiceImpl; @RequestMapping("/login") public Result login(@RequestParam String uact, @RequestParam String upwd) { String msg = userServiceImpl.loginService(uact,upwd); if(("SUCCESS").equals(msg)){ return ResultUtil.success("登录成功"); }else{ return ResultUtil.error(msg); } } @RequestMapping("/register") public Result login(@RequestBody User user) { String msg = userServiceImpl.registerService(user); if(("SUCCESS").equals(msg)){ return ResultUtil.success("注册成功"); }else{ return ResultUtil.error(msg); } } }
3.8 Result、ResultCode、ResultUtil 返回结果工具类
在正式开发中，我们返回给前端除了Body之外，还需要状态码与状态信息，这就需要使用到Result工具类，其返回效果如下
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Result类
package com.bcn.springboot_mongodb_login.util; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; /** * @author 大白菜 * @date Created in 2022/9/26 19:54 */ @Data @AllArgsConstructor @NoArgsConstructor public class Result<T> { private Integer code; private String msg; private T data; }
ResultCode类
package com.bcn.springboot_mongodb_login.util; /** * @author 大白菜 * @date Created in 2022/9/26 19:50 */ public enum ResultCode { // 自定义枚举内容 SUCCESS(200, "Success"), ERROR(400, "Error"); private Integer code; private String msg; ResultCode(Integer code, String msg) { this.code = code; this.msg = msg; } public Integer getCode() { return code; } public String getMsg() { return msg; } }
ResultUtil类
package com.bcn.springboot_mongodb_login.util; /** * @author 大白菜 * @date Created in 2022/9/26 19:55 */ public class ResultUtil { /** * 成功且带数据 **/ public static Result success(Object object) { Result result = new Result(); result.setCode(ResultCode.SUCCESS.getCode()); result.setMsg(ResultCode.SUCCESS.getMsg()); result.setData(object); return result; } /** * 成功但不带数据 **/ public static Result success() { return success(null); } /** * 失败 **/ public static Result error(Object object) { Result result = new Result(); result.setCode(ResultCode.ERROR.getCode()); result.setMsg(ResultCode.ERROR.getMsg()); result.setData(object); return result; } }
3.9 login.js数据库文件
/* Navicat Premium Data Transfer Source Server : Demo Source Server Type : MongoDB Source Server Version : 60001 (6.0.1) Source Host : localhost:27017 Source Schema : login Target Server Type : MongoDB Target Server Version : 60001 (6.0.1) File Encoding : 65001 Date: 12/10/2022 11:05:31 */ // ---------------------------- // Collection structure for user // ---------------------------- db.getCollection("user").drop(); db.createCollection("user"); // ---------------------------- // Documents of user // ---------------------------- db.getCollection("user").insert([ { _id: ObjectId("634617c49d110f9df6014f83"), username: "bcn", password: "123" } ]); db.getCollection("user").insert([ { _id: ObjectId("634618219d110f9df6014f85"), username: "alg", password: 123 } ]); db.getCollection("user").insert([ { _id: ObjectId("63462e5c39561e5497cfd4bf"), username: "aaa", password: "123", _class: "com.bcn.springboot_mongodb_login.pojo.User" } ]);
接口测试
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