SpringBoot_认证授权_JWT

àì夳堔傛蜴生んèń 2021-10-06 03:32 559阅读 0赞

### SpringBoot\_认证授权\_JWT ###

*  依赖pom.xml
 *  配置文件bootstrap.yml
 *  配置源码
 *   *  配置
     *  请求拦截器
     *  配置拦截器

# 依赖pom.xml #

<dependency>
    		<groupId>org.springframework.security</groupId>
    		<artifactId>spring-security-jwt</artifactId>
    		<version>1.0.8.RELEASE</version>
    	</dependency>
    	<dependency>
    		<groupId>io.jsonwebtoken</groupId>
    		<artifactId>jjwt</artifactId>
    	</dependency>

# 配置文件bootstrap.yml #

# 配置源码 #

## 配置 ##

/**
     * 生成、解析token工具类
     * @return
     */
    @Bean
    public Jwt jwt() {
    	return new Jwt(bProperties.getJwtKey(), bProperties.getJwtTtl());
    }
    
    //生成、解析token工具类
    public static class Jwt {
    	private String key;
    	private long ttl;
    
    	public Jwt(String key, long ttl) {
    		this.key = key;
    		this.ttl = ttl;
    	}
    
    	/**
    	 * 生成token
    	 * @param id 用户id
    	 * @param subject  用户名称
    	 * @param map 相关参数
    	 * @return
    	 */
    	public String createJWT(String id, String subject, Map<String, Object> map) {
    		long now = System.currentTimeMillis();
    		long exp = now + ttl;
    		JwtBuilder jwtBuilder = Jwts.builder().setId(id).setSubject(subject).setIssuedAt(new Date())
    				.signWith(SignatureAlgorithm.HS256, key);
    		for (Map.Entry<String, Object> entry : map.entrySet()) {
    			jwtBuilder.claim(entry.getKey(), entry.getValue());
    		}
    		if (ttl > 0) {
    			jwtBuilder.setExpiration(new Date(exp));
    		}
    		String token = jwtBuilder.compact();
    		return token;
    	}
    
    	/**
    	 * 解析token
    	 * @param token
    	 * @return
    	 */
    	public Claims parseJWT(String token) {
    		Claims claims = null;
    		try {
    			claims = Jwts.parser().setSigningKey(key).parseClaimsJws(token).getBody();
    		} catch (Exception e) {
    		}
    		return claims;
    	}
    }

## 请求拦截器 ##

/**
     * 不够安全
     * 
     * 登录，并返回token到页面，String token = jwtUtils.createJwt(user.getId(), user.getUsername(), map);
     * map添加Auth.JWT_API_NAME，存放授权关键字
     * 每次请求携带token
     * 
     * 统一的用户权限校验(访问接口的权限)
     * 
     * @author vander
     *
     */
    @Component
    public class JwtInterceptor extends HandlerInterceptorAdapter {
    
    	@Autowired
    	Jwt jwt;
    
    	@Override
    	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
    			throws Exception {
    		// 1.通过request获取请求token信息
    		String authorization = request.getHeader("Authorization");
    		// 判断请求头信息是否为空，或者是否已Bearer开头
    		if (!StringUtils.isEmpty(authorization) && authorization.startsWith("Bearer")) {
    			// 获取token数据
    			String token = authorization.replace("Bearer ", "");
    			// 解析token获取claims
    			Claims claims = jwt.parseJWT(token);
    			if (claims != null) {
    				// 通过claims获取到当前用户的可访问API权限字符串
    				String apis = (String) claims.get(Auth.JWT_API_NAME); // api-user-delete,api-user-update
    				// 通过handler
    				HandlerMethod h = (HandlerMethod) handler;
    				// 获取接口上的reqeustmapping注解
    				RequestMapping annotation = h.getMethodAnnotation(RequestMapping.class);
    				// 获取当前请求接口中的name属性
    				String name = annotation.name();
    				// 判断当前用户是否具有响应的请求权限
    				if (apis.contains(name)) {
    					request.setAttribute(Auth.JWT_USER_CLAIMS, claims);
    					return true;
    				} else {
    					throw new BException(Code.USER_NO_PERMISSION);
    				}
    			}
    		}
    		throw new BException(Code.USER_NO_PERMISSION);
    	}
    
    }

## 配置拦截器 ##

/**
     * 拦截器配置
     * 
     * @author vander
     *
     */
    @Configuration
    public class InterceptorConfig extends WebMvcConfigurationSupport {
    
    	@Autowired
    	private JwtInterceptor jwtInterceptor;
    	@Autowired
    	BProperties bProperties;	
        //添加自定义拦截器
    	@Override
    	protected void addInterceptors(InterceptorRegistry registry) {
    		if(bProperties.isEnableJwt()) {
    			registry.addInterceptor(jwtInterceptor)
    			.addPathPatterns(bProperties.getJwtPath())
    			.excludePathPatterns(bProperties.getJwtExclude()); // 设置不拦截的请求地址
    		}
    	}
        //排除静态资源访问
    	@Override
    	protected void addResourceHandlers(ResourceHandlerRegistry registry) {
    		registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");
    	}
    }