springboot实现注册加密与登录解密功能(demo)

前情提要：本demo是基于springboot+mybatis-plus实现加密,加密为主，全局异常处理，日志处理为辅，而登录密码加密是每个项目中必须要的，密码不可能明文存入数据，这样没有安全性。
涉及的功能，全局异常处理，日志处理，mybatis-plus实现与数据库的交互,密码加密,restful风格

涉及的工具：IDEA,postman,sqlyog（navicat）

1. 首先我们直接看效果吧，如果你不满意，也就没必要看了

如果这正是你想要的效果呢，那你可以继续看下面的内容了

2. 首先，我们看下pom.xml文件

以下依赖为所需的主要依赖

<?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>2.2.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.jgsu</groupId>
<artifactId>springboot_rsa_encryption</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot_encryption</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- WEB依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- 热部署依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<!-- mysql的依赖，用于连接数据库-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<!-- lombok依赖,简化set/get方法 -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.20</version>
</dependency>
<!--druid数据源-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<!--mybatis-plus-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.2.0</version>
</dependency>
<!--spring-security实现密码加密-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>2.1.6.RELEASE</version>
</dependency>
<!--fastjsoon-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.51</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

3. 创建启动类SpringbootEncryptionApplication

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
@SpringBootApplication
@MapperScan("com.jgsu.mapper")
public class SpringbootEncryptionApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootEncryptionApplication.class, args);
}

/**
* 将加密工具类加入IOC容器中,便于加密
* */
@Bean
public BCryptPasswordEncoder encoder() {
return new BCryptPasswordEncoder();
}
}

4.实体类

这里只有用户名和密码(其他数据自己可扩展)

@Data
@AllArgsConstructor
@NoArgsConstructor
@TableName("user")
public class User {
@TableId(value = "id",type = IdType.AUTO)
private int id;
private String username;
private String password;
}

5. service层(业务层)

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.jgsu.entity.User;
import com.jgsu.exception.DataAddException;
import com.jgsu.exception.DataMatchException;
import com.jgsu.mapper.UserMapper;
import com.jgsu.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;
@Slf4j
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserMapper userMapper;
// 数据加密，在启动类中已经注入进IOC容器中
@Autowired
private BCryptPasswordEncoder encoder;
@Override
public User userLogin(String username,String password) {
// mybatis-plus的条件构造器，这里实现根据username查询
QueryWrapper<User> wrapper = new QueryWrapper<User>();
wrapper.eq("username", username);
User userLogin = userMapper.selectOne(wrapper);
/**
* encoder.matches(password, userLogin.getPassword()，实现输入的密码与数据库中的密码进
* 行匹配,如果匹配成功则返回匹配的数据给controller层，如果失败则抛异常。
* 为什么没盐，没有解密了?因为这个已经被CryptPasswordEncoder封装好了，
* 在encoder.matches()方进行解密匹配完全帮你封装好了，所以不必考虑，
* 只需要将前端传入的密码与数据库中加密后的密码进行匹配就行。
* **/
if (userLogin != null && encoder.matches(password, userLogin.getPassword())) {
log.info("用户{}，登录成功",username);
return userLogin;
} else {
log.error("用户名或密码错误");
throw new DataMatchException("405", "用户名或密码错误");
}
}
@Override
public User userRegister(String username, String password) {
User user = new User();
user.setId(user.getId());
user.setUsername(username);
user.setPassword(encoder.encode(password));
int i = userMapper.insert(user);
if (i == 1){
log.info("用户{}注册成功",username);
return user;
}else {
log.error("服务器发生异常，注册失败");
throw new DataAddException("403","注册失败");
}
}
}

6. mapper层

如果不了解，可以建议去看看mybatis-plus官方文档

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.jgsu.entity.User;
import org.springframework.stereotype.Repository;
@Repository
public interface UserMapper extends BaseMapper<User> {
}

7.controller层

import com.jgsu.entity.User;
import com.jgsu.service.UserService;
import com.jgsu.utils.CommonResult;
import com.jgsu.utils.ResultCode;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
UserService userService;
// 注册，基于restful风格
@GetMapping("/register/{username}/{password}")
public CommonResult register(@PathVariable("username") String username,@PathVariable("password") String password){
User user = userService.userRegister(username, password);
if (user != null){
return CommonResult.success(ResultCode.SUCCESS);
}else {
return CommonResult.failed(ResultCode.FAILED);
}
}
// 登录，基于restful风格
@GetMapping("/login/{username}/{password}")
public CommonResult login(@PathVariable("username") String username,@PathVariable("password") String password) {
User userLogin = userService.userLogin(username,password);
if (userLogin != null) {
return CommonResult.success(ResultCode.SUCCESS);
} else {
return CommonResult.failed(ResultCode.USERNAME_OR_PASSWORD_ERROR);
}
}
}

8.配置类(返回json数据的类)

封装错误码的接口

public interface IErrorCode {
long getState();
String getMessage();
}

枚举了一些常用API操作码

public enum ResultCode implements IErrorCode {
/**
* 成功
*/
SUCCESS(200, "ok"),
/**
* 失败
*/
FAILED(500, "server error"),
/**
* 验证过期
*/
VALIDATE_FAILED(404, "undefined"),
/**
* 未登录
*/
UNAUTHORIZED(401, "未登录"),
/**
* 用户名或密码错误
*/
USERNAME_OR_PASSWORD_ERROR(405, "用户名或密码错误"),
/**
* 数据查询错误
*/
DATA_Not_Exist_ERROR(603, "数据不存在"),
/**
* 数据添加出现问题
*/
DATA_ADD_ERROR(604, "数据添加异常"),
/**
* 文件
*/
FILE_ERROR(605, "上传文件出现错误"),
/**
* 数据查询出现问题
*/
IMAGE_ERROR(606, "图片处理出现错误"),
/**
* 权限不够
*/
FORBIDDEN(403, "forbidden");
private long state;
private String stateInfo;
ResultCode(long state, String stateInfo) {
this.state = state;
this.stateInfo = stateInfo;
}
@Override
public long getState() {
return state;
}
@Override
public String getMessage() {
return stateInfo;
}
}

通用返回对象

public class CommonResult<T> {
private long state;
private String stateInfo;
private T data;
public CommonResult() {
}
public CommonResult(long state, String stateInfo, T data) {
this.state = state;
this.stateInfo = stateInfo;
this.data = data;
}
public CommonResult(long state, String stateInfo) {
this.state = state;
this.stateInfo = stateInfo;
}
/**
* 成功返回结果
*
* @param data 获取的数据
*/
public static <T> CommonResult<T> success(T data) {
return new CommonResult<T>(ResultCode.SUCCESS.getState(), ResultCode.SUCCESS.getMessage(), data);
}
/**
* 成功返回结果
* @param data 获取的数据
* @param message 提示信息
* @return
*/
public static <T> CommonResult<T> success(T data, String message) {
return new CommonResult<T>(ResultCode.SUCCESS.getState(), message, data);
}
/**
* 失败返回结果
* @param errorCode 错误码
*/
public static <T> CommonResult<T> failed(IErrorCode errorCode) {
return new CommonResult<T>(errorCode.getState(), errorCode.getMessage(), null);
}
/**
* 失败返回结果
* @param message 提示信息
*/
public static <T> CommonResult<T> failed(String message) {
return new CommonResult<T>(ResultCode.FAILED.getState(), message, null);
}
/**
* 失败返回结果
* @param code
* @param message
*/
public static <T> CommonResult<T> failed(int code, String message) {
return failed(ResultCode.FAILED);
}
/**
* 参数验证失败返回结果
*/
public static <T> CommonResult<T> validateFailed() {
return failed(ResultCode.VALIDATE_FAILED);
}
/**
* 参数验证失败返回结果
* @param message 提示信息
*/
public static <T> CommonResult<T> validateFailed(String message) {
return new CommonResult<T>(ResultCode.VALIDATE_FAILED.getState(), message, null);
}
/**
* 未登录返回结果
*/
public static <T> CommonResult<T> unauthorized(T data) {
return new CommonResult<T>(ResultCode.UNAUTHORIZED.getState(), ResultCode.UNAUTHORIZED.getMessage(), data);
}
/**
* 未授权返回结果
*/
public static <T> CommonResult<T> forbidden(T data) {
return new CommonResult<T>(ResultCode.FORBIDDEN.getState(), ResultCode.FORBIDDEN.getMessage(), data);
}
public long getState() {
return state;
}
public void setState(long state) {
this.state = state;
}
public String getStateInfo() {
return stateInfo;
}
public void setStateInfo(String stateInfo) {
this.stateInfo = stateInfo;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
}

9. 异常类

全局异常拦截类

@Slf4j
@ControllerAdvice
@ResponseBody
public class GlobalExceptionHander {
@ExceptionHandler(value = Exception.class)
public CommonResult handlerException(Exception e){
if (e instanceof DataAddException){
log.error("【全局异常拦截】DataAddException: 请求方法 {}, 请求路径 {}",((DataAddException)e).getCode(),((DataAddException)e).getMessage());
return CommonResult.failed(ResultCode.DATA_ADD_ERROR);
}else if (e instanceof DataMatchException){
log.error("【全局异常拦截】DataMatchException: 请求方法 {}, 请求路径 {}",((DataMatchException)e).getCode(),((DataMatchException)e).getMessage());
return CommonResult.failed(ResultCode.USERNAME_OR_PASSWORD_ERROR);
} else {
log.error("服务器内部出错{}",e);
return CommonResult.failed(ResultCode.FAILED);
}
}
}

自定义数据添加异常类

public class DataAddException extends RuntimeException {
private String code;
private String message;
public DataAddException(String code, String message) {
this.code = code;
this.message = message;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
@Override
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}

自定义数据匹配异常类

public class DataMatchException extends RuntimeException {
private String code;
private String message;
public DataMatchException(String code, String message) {
this.code = code;
this.message = message;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
@Override
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}

以上是实现该功能的所有类，当然进行密码加密处理的类只涉及service层以及启动类，其他类为基本类，如果你只想了解怎么进行加密处理存入数据库以及怎么登陆就看看service层就行。

来源：https://juejin.im/post/5e5375a0e51d45270218f51f