Spring Boot中的数据脱敏处理

在Spring Boot中实现数据脱敏处理，可以通过自定义注解和AOP（面向切面编程）来实现。以下是一个简单的例子：

1. 定义脱敏注解：

@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER})
public @interface Desensitize {
    DesensitizeType type() default DesensitizeType.PHONE;
}
 
public enum DesensitizeType {
    PHONE,      // 手机号
    ID_CARD,    // 身份证号
    EMAIL,      // 邮箱
    USERNAME    // 用户名
    // 可以根据需要扩展其他类型
}

2. 创建一个AOP切面处理脱敏：

@Aspect
@Component
public class DesensitizeAspect {
 
    @Around("@annotation(desensitize)")
    public Object desensitizeData(ProceedingJoinPoint joinPoint, Desensitize desensitize) throws Throwable {
        Object result = joinPoint.proceed();
        if (result instanceof String) {
            result = desensitize((String) result, desensitize.type());
        } else if (result instanceof Collection<?>) {
            Collection<?> collection = (Collection<?>) result;
            collection.forEach(item -> {
                if (item instanceof String) {
                    collection.add(desensitize((String) item, desensitize.type()));
                }
            });
        }
        // 其他类型的处理...
        return result;
    }
 
    private String desensitize(String data, DesensitizeType type) {
        switch (type) {
            case PHONE:
                return desensitizePhone(data);
            case ID_CARD:
                return desensitizeIdCard(data);
            case EMAIL:
                return desensitizeEmail(data);
            case USERNAME:
                return desensitizeUsername(data);
            default:
                return data;
        }
    }
 
    private String desensitizePhone(String phone) {
        // 手机号脱敏逻辑
        return phone.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
    }
 
    private String desensitizeIdCard(String idCard) {
        // 身份证号脱敏逻辑
        return idCard.replaceAll("(\\d{4})\\d{10}(\\d{4})", "$1*****$2");
    }
 
    private String desensitizeEmail(String email) {
        // 邮箱脱敏逻辑
        return email.replaceAll("(\\w?)\\w*(?=@)", "$1***");
    }
 
    private String desensitizeUsername(String username) {
        // 用户名脱敏逻辑
        if (username.length() > 2) {
            return username.substring(0, 1) + "**";
        }
        return username;
    }
}

3. 使用脱敏注解：

public class UserController {
 
    @GetMapping("/user/info")
    @Desensi