springsecurity5.7怎样配置token验证

Spring Security 5.7 可以通过配置使用 JWT （JSON Web Token）进行 token 验证。

首先，需要添加以下依赖：

<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>

然后，在 Spring Security 的配置类中添加以下代码：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Autowired
    private JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;
 
    @Autowired
    private JwtRequestFilter jwtRequestFilter;
 
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        // configure AuthenticationManagerBuilder
    }
 
    @Bean
    public PasswordEncoder passwordEncoder() {
        return NoOpPasswordEncoder.getInstance();
    }
 
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
 
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity.csrf().disable()
                .authorizeRequests().antMatchers("/authenticate").permitAll().
                        anyRequest().authenticated().and().
                        exceptionHandling().authenticationEntryPoint(jwtAuthenticationEntryPoint).and().sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS);
        httpSecurity.addFilterBefore(jwtRequestFilter, UsernamePasswordAuthenticationFilter.class);
    }
}

其中，JwtAuthenticationEntryPoint 是用于处理 token 认证失败的类，JwtRequestFilter 是用于验证 token 的过滤器。

接下来，需要实现一个 JwtTokenUtil 类用于生成和验证 token：

@Component
public class JwtTokenUtil {
 
    private static final String SECRET_KEY = "secret";
 
    public String generateToken(UserDetails userDetails) {
        Map<String, Object> claims = new HashMap<>();
        return createToken(claims, userDetails.getUsername());
    }
 
    private String createToken(Map<String, Object> claims, String subject) {
        return Jwts.builder().setClaims(claims).setSubject(subject).setIssuedAt(new Date(System.currentTimeMillis()))
                .setExpiration(new Date(System.currentTimeMillis() + 1000 * 60 * 60 * 10))
                .signWith(SignatureAlgorithm.HS256, SECRET_KEY).compact();
    }
 
    public Boolean validateToken(String token, UserDetails userDetails) {
        final String username = getUsernameFromToken(token);
        return (username.equals(userDetails.getUsername()) && !isTokenExpired(token));
    }
 
    private Boolean isTokenExpired(String token) {
        final Date expiration = getExpirationDateFromToken(token);
        return expiration.before(new Date());
    }
 
    public String getUsernameFromToken(String token) {
        return Jwts.parser().setSigningKey(SECRET_KEY).parseClaimsJws(token).getBody().getSubject();
    }
 
    private Date getExpirationDateFromToken(String token) {
        return Jwts.parser().setSigningKey(SECRET_KEY).parseClaimsJws(token).getBody().getExpiration();
    }
}

最后，在 Controller 中使用 JwtTokenUtil 和 AuthenticationManager 进行 token 认证：

@RestController
public class JwtAuthenticationController {
 
    @Autowired
    private AuthenticationManager authenticationManager;
 
    @Autowired
    private JwtTokenUtil jwtTokenUtil;
 
    @Autowired
    private UserDetailsService userDetailsService;
 
    @RequestMapping(value = "/authenticate", method = RequestMethod.POST)
    public ResponseEntity<?> createAuthenticationToken(@RequestBody JwtRequest authenticationRequest) throws Exception {
 
        authenticate(authenticationRequest.getUsername(), authenticationRequest.getPassword());
 
        final UserDetails userDetails = userDetailsService.loadUserByUsername(authenticationRequest.getUsername());
 
        final String token = jwtTokenUtil.generateToken(userDetails);
 
        return ResponseEntity.ok(new JwtResponse(token));
    }
 
    private void authenticate(String username, String password) throws Exception {
        try {
            authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(username, password));
        } catch (DisabledException e) {
            throw new Exception("USER_DISABLED", e);
        } catch (BadCredentialsException e) {
            throw new Exception("INVALID_CREDENTIALS", e);
        }
    }
}

以上代码实现了一个简单的基于 JWT 的 token 验证。当用户在请求 /authenticate 接口时，会进行用户名和密码的验证，并返回一个 token。之后，用户在每次请求时需要将 token 放入请求头中，服务端通过过滤器进行 token 验证。如果验证成功，就可以进行相应的操作。