spring注解实现防盗链拦截

首先配置 applicationContext.xml, 添加

<!-- 启用 @AspectJ -->
<aop:aspectj-autoproxy />

新建Java工具类 util.java，获取referer信息

/**
* Title:工具类
* @author Victor
*/
public class util {
    /**
    * @description 获取referer,实现防盗链
    * @param request
    * @return String host
    */
    public static String getReferer(HttpServletRequest request) {
        String referer = request.getHeader("referer");
        if(referer == null) {
            return "nullReferer";
        }
        // 提取域名
        try {
            URL referUrl = new URL(referer);
            String host = referUrl.getHost();
            return host;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        return "nullReferer";
    }
}

新建 annotation 注解接口，实现自定义注解 AntitheftChain.java

/**
 * Title:自定义注解
 * Description: 标识是是否开启防盗链检查
 * @author Victor
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface AntitheftChain {

}

了解更多关于 annotation 注解的知识，转至：https://www.cnblogs.com/victorlyw/articles/9969072.html

新建java类 SecurityAspect.java 实现安全检查

/**
* Title:安全检查切面(是否登录检查)
* @author Victor
*/
@Component
@Aspect
public class SecurityAspect {
    @Around("@annotation(org.springframework.web.bind.annotation.RequestMapping)")
    public Object execute(ProceedingJoinPoint pjp) throws Throwable {
        // 从切点上获取目标方法
        MethodSignature methodSignature = (MethodSignature) pjp.getSignature();
        Method method = methodSignature.getMethod();
        // 目标方法是否开启防盗链检查
        if (method.isAnnotationPresent(AntitheftChain.class)) {
            // 获取请求域名
            String getDomain = util.getReferer(WebContextUtil.getRequest());
            if (getDomain == null || !getDomain.startsWith("localhost")) {
                throw new domainException("没有认证域名");
            }
        }
    }
}

新建 java类 domainException.java 异常处理

/**
* Title:盗链异常处理
* @author Victor
*/
public class domainException extends RuntimeException {
    private static final long serialVersionUID = 1L;

    private String msg;

    public DomainException(String msg) {
    super();
    this.msg = msg;
    }

    public String getMsg() {
    return msg;
    }

    public void setMsg(String msg) {
    this.msg = msg;
    }
}

以上异常可以统一处理