springboot记住密码jwt令牌

对于Spring Boot应用程序记住密码和使用JWT令牌进行身份验证的场景，你可以按照以下步骤进行操作：

1. 添加依赖：在`pom.xml`文件中添加Spring Security和JWT的依赖项。

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt</artifactId>
    <version>0.9.1</version>
</dependency>

2. 创建Spring Security配置类：创建一个类来扩展`WebSecurityConfigurerAdapter`，并覆盖`configure`方法。

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
            .authorizeRequests()
                .antMatchers("/api/auth/**")
                .permitAll()
                .anyRequest()
                .authenticated();
    }

    @Override
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService())
            .passwordEncoder(passwordEncoder());
    }

    @Bean
    @Override
    public UserDetailsService userDetailsService() {
        // 实现自定义的UserDetailsService接口来获取用户信息并进行身份验证
        return new CustomUserDetailsService();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        // 使用BCryptPasswordEncoder来对密码进行加密和验证
        return new BCryptPasswordEncoder();
    }
}

3. 创建用户实体类：创建一个用户实体类，用于保存用户信息。

@Entity
@Table(name = "users")
public class User implements UserDetails {

    // 实现UserDetails接口的方法
    
    // 用户名、密码等其他属性
    
    // getter和setter方法
}

4. 创建自定义UserDetailsService：实现Spring Security的`UserDetailsService`接口，用于获取用户信息。

@Service
public class CustomUserDetailsService implements UserDetailsService {

    @Autowired
    private UserRepository userRepository;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userRepository.findByUsername(username);
        if (user == null) {
            throw new UsernameNotFoundException("User not found with username: " + username);
        }
        return user;
    }
}

5. 创建JWT工具类：创建一个JWT工具类，用于生成和解析JWT令牌。

@Component
public class JwtTokenProvider {

    private static final String SECRET_KEY = "yourSecretKey";
    private static final long EXPIRATION_TIME = 86400000; // 24小时

    public String generateToken(Authentication authentication) {
        User user = (User) authentication.getPrincipal();
        Date now = new Date();
        Date expiryDate = new Date(now.getTime() + EXPIRATION_TIME);

        return Jwts.builder()
                .setSubject(user.getUsername())
                .setIssuedAt(new Date())
                .setExpiration(expiryDate)
                .signWith(SignatureAlgorithm.HS512, SECRET_KEY)
                .compact();
    }

    public boolean validateToken(String token) {
        try {
            Jwts.parser().setSigningKey(SECRET_KEY).parseClaimsJws(token);
            return true;
        } catch (SignatureException ex) {
            System.out.println("Invalid JWT signature");
        } catch (MalformedJwtException ex) {
            System.out.println("Invalid JWT token");
        } catch (ExpiredJwtException ex) {
            System.out.println("Expired JWT token");
        } catch (UnsupportedJwtException ex) {
            System.out.println("Unsupported JWT token");
        } catch (IllegalArgumentException ex) {