在现代企业级应用开发中,数据安全和隐私保护越来越重要。本文将详细介绍如何在Spring Boot项目中实现一套完整的数据脱敏系统,保护用户隐私数据的安全。
📋 目录
1. 概述
1.1 什么是数据脱敏
数据脱敏(Data Masking)是指对敏感数据进行变形、遮蔽或替换处理,使其在保持数据格式和业务逻辑正确的前提下,无法被直接识别和利用,从而保护数据隐私和安全。
1.2 为什么需要数据脱敏
- 法律合规:满足《个人信息保护法》、GDPR等法规要求
- 安全防护:防止敏感数据泄露造成的安全风险
- 开发测试:为开发和测试环境提供安全的数据
- 日志安全:避免敏感信息在日志中明文显示
- 第三方对接:对外提供数据时保护用户隐私
1.3 实现目标
✅ 多场景支持:JSON序列化、日志输出、AOP拦截
✅ 丰富的脱敏类型:手机号、邮箱、身份证、银行卡等
✅ 灵活配置:支持全局配置和注解级别控制
✅ 高性能:优化算法,支持批量处理
✅ 易扩展:模块化设计,便于添加新的脱敏规则
2. 技术架构设计
2.1 整体架构图
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| ┌─────────────────────────────────────────────────────────────┐ │ 数据脱敏系统架构 │ ├─────────────────────────────────────────────────────────────┤ │ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │ │ 注解层 │ │ 配置层 │ │ 工具层 │ │ │ │ @Sensitive │ │SensitiveConfig│ │SensitiveUtil │ │ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │ │ │ │ │ │ ▼ ▼ ▼ │ │ ┌─────────────────────────────────────────────────────────┐ │ │ │ 处理层 │ │ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │ │ │ │ AOP 切面 │ │ JSON序列化 │ │ 日志处理 │ │ │ │ │ │SensitiveAspect│ │JsonSerializer│ │ LogUtil │ │ │ │ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │ │ └─────────────────────────────────────────────────────────┘ │ │ │ │ │ ▼ │ │ ┌─────────────────────────────────────────────────────────┐ │ │ │ 输出层 │ │ │ │ API响应 日志文件 控制台输出 │ │ │ └─────────────────────────────────────────────────────────┘ │ └─────────────────────────────────────────────────────────────┘
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2.2 核心模块说明
| 模块 |
功能 |
作用 |
| 注解层 |
标记敏感字段 |
通过注解声明脱敏规则 |
| 配置层 |
全局配置管理 |
统一管理脱敏开关和参数 |
| 工具层 |
脱敏算法实现 |
提供各种脱敏处理方法 |
| 处理层 |
自动脱敏处理 |
在不同场景下自动应用脱敏 |
2.3 支持的脱敏场景
- JSON 序列化:API 响应自动脱敏
- 日志输出:日志记录时自动脱敏
- AOP 拦截:方法返回值自动脱敏
- 手动调用:程序中手动脱敏处理
3. 核心组件实现
3.1 脱敏类型枚举
首先定义支持的脱敏类型:
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| public enum SensitiveType { MOBILE, NAME, EMAIL, PASSWORD, ID_CARD, BANK_CARD, ADDRESS, CAR_LICENSE, FIXED_PHONE, CUSTOM }
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3.2 敏感数据注解
设计一个功能丰富的注解:
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| @Target({ElementType.FIELD, ElementType.METHOD}) @Retention(RetentionPolicy.RUNTIME) public @interface Sensitive {
SensitiveType value() default SensitiveType.CUSTOM;
int keepStart() default 2;
int keepEnd() default 2;
String maskChar() default "*";
boolean enableLog() default true;
boolean enableJson() default true; }
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3.3 脱敏工具类核心实现
实现各种脱敏算法:
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| @Component public class SensitiveUtil {
private static final String DEFAULT_MASK_CHAR = "*"; private static final Pattern MOBILE_PATTERN = Pattern.compile("^1[3-9]\\d{9}$");
public static String desensitize(String data, SensitiveType type) { if (!StringUtils.hasText(data) || type == null) { return data; } switch (type) { case MOBILE: return desensitizeMobile(data); case NAME: return desensitizeName(data); case EMAIL: return desensitizeEmail(data); case PASSWORD: return desensitizePassword(data); case ID_CARD: return desensitizeIdCard(data); case BANK_CARD: return desensitizeBankCard(data); case ADDRESS: return desensitizeAddress(data); case CAR_LICENSE: return desensitizeCarLicense(data); case FIXED_PHONE: return desensitizeFixedPhone(data); case CUSTOM: default: return desensitizeDefault(data); } }
public static String desensitizeMobile(String mobile) { if (!StringUtils.hasText(mobile)) { return mobile; } if (!MOBILE_PATTERN.matcher(mobile).matches()) { return mobile; } return mobile.substring(0, 3) + "****" + mobile.substring(7); }
public static String desensitizeName(String name) { if (!StringUtils.hasText(name)) { return name; } int length = name.length(); if (length <= 1) { return name; } if (length == 2) { return name.charAt(0) + "*"; } else if (length == 3) { return name.substring(0, 2) + "*"; } else { return name.substring(0, 2) + repeatChar("*", length - 2); } }
public static String desensitizeCustom(String data, int keepStart, int keepEnd, String maskChar) { if (!StringUtils.hasText(data)) { return data; } if (keepStart < 0) keepStart = 0; if (keepEnd < 0) keepEnd = 0; if (!StringUtils.hasText(maskChar)) maskChar = DEFAULT_MASK_CHAR; int length = data.length(); if (keepStart + keepEnd >= length) { return data; } String start = data.substring(0, keepStart); String end = data.substring(length - keepEnd); String middle = repeatChar(maskChar, length - keepStart - keepEnd); return start + middle + end; }
private static String repeatChar(String str, int count) { if (count <= 0) { return ""; } StringBuilder sb = new StringBuilder(); for (int i = 0; i < count; i++) { sb.append(str); } return sb.toString(); } }
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3.4 JSON 序列化脱敏处理器
实现Jackson自定义序列化器:
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| public class SensitiveJsonSerializer extends JsonSerializer<String> implements ContextualSerializer {
private SensitiveType sensitiveType; private int keepStart; private int keepEnd; private String maskChar; private boolean enableJson;
public SensitiveJsonSerializer() { }
public SensitiveJsonSerializer(SensitiveType sensitiveType, int keepStart, int keepEnd, String maskChar, boolean enableJson) { this.sensitiveType = sensitiveType; this.keepStart = keepStart; this.keepEnd = keepEnd; this.maskChar = maskChar; this.enableJson = enableJson; }
@Override public void serialize(String value, JsonGenerator gen, SerializerProvider serializers) throws IOException { if (!enableJson) { gen.writeString(value); return; }
String maskedValue = desensitizeValue(value); gen.writeString(maskedValue); }
@Override public JsonSerializer<?> createContextual(SerializerProvider prov, BeanProperty property) throws JsonMappingException { if (property != null) { Sensitive sensitive = property.getAnnotation(Sensitive.class); if (sensitive != null) { return new SensitiveJsonSerializer( sensitive.value(), sensitive.keepStart(), sensitive.keepEnd(), sensitive.maskChar(), sensitive.enableJson() ); } } return this; }
private String desensitizeValue(String value) { if (sensitiveType == null) { return value; }
if (sensitiveType == SensitiveType.CUSTOM) { return SensitiveUtil.desensitizeCustom(value, keepStart, keepEnd, maskChar); }
return SensitiveUtil.desensitize(value, sensitiveType); } }
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3.5 AOP 切面脱敏处理器
实现自动脱敏的AOP切面:
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| @Aspect @Component public class SensitiveAspect {
private static final Logger logger = LoggerFactory.getLogger(SensitiveAspect.class);
@Autowired private SensitiveConfig.SensitiveProperties sensitiveProperties;
@Pointcut("execution(public * org.practice.surveymaster.controller..*(..))") public void controllerMethods() {}
@Around("controllerMethods()") public Object aroundController(ProceedingJoinPoint joinPoint) throws Throwable { if (!sensitiveProperties.isEnabled()) { return joinPoint.proceed(); }
Object result = joinPoint.proceed();
return desensitizeResult(result); }
private Object desensitizeResult(Object result) { if (result == null) { return null; }
try { if (result instanceof List) { return desensitizeList((List<?>) result); } else if (result.getClass().getPackage() != null && result.getClass().getPackage().getName().startsWith("org.practice.surveymaster")) { return desensitizeObject(result); } } catch (Exception e) { logger.warn("脱敏处理失败: {}", e.getMessage(), e); }
return result; }
private Object desensitizeObject(Object obj) { if (obj == null) { return null; }
Class<?> clazz = obj.getClass(); Field[] fields = clazz.getDeclaredFields();
for (Field field : fields) { Sensitive sensitive = field.getAnnotation(Sensitive.class); if (sensitive != null && field.getType() == String.class) { try { field.setAccessible(true); String originalValue = (String) field.get(obj); String desensitizedValue = desensitizeFieldValue(originalValue, sensitive); field.set(obj, desensitizedValue); logger.debug("字段 {} 脱敏处理完成", field.getName()); } catch (IllegalAccessException e) { logger.warn("无法访问字段 {}: {}", field.getName(), e.getMessage()); } catch (Exception e) { logger.error("字段 {} 脱敏处理异常: {}", field.getName(), e.getMessage(), e); } } }
return obj; } }
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4. 配置和使用
4.1 配置类实现
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| @Configuration @ConfigurationProperties(prefix = "sensitive") public class SensitiveConfig {
private boolean enabled = true;
private boolean enableLog = true;
private boolean enableJson = true;
private String defaultMaskChar = "*";
@Bean @Primary public ObjectMapper sensitiveObjectMapper() { ObjectMapper objectMapper = new ObjectMapper(); objectMapper.registerModule(new JavaTimeModule()); objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS); objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); SimpleModule sensitiveModule = new SimpleModule("SensitiveModule"); sensitiveModule.addSerializer(String.class, new SensitiveJsonSerializer()); objectMapper.registerModule(sensitiveModule); return objectMapper; } }
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4.2 应用配置文件
在 application.yml 中添加脱敏配置:
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| sensitive: enabled: true enable-log: true enable-json: true default-mask-char: "*"
spring: jackson: date-format: yyyy-MM-dd HH:mm:ss time-zone: GMT+8 serialization: write-dates-as-timestamps: false deserialization: fail-on-unknown-properties: false
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4.3 实体类使用示例
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| @Data @JsonIgnoreProperties(ignoreUnknown = true) public class User { private int id; @Sensitive(SensitiveType.NAME) @JsonSerialize(using = SensitiveJsonSerializer.class) private String username; @Sensitive(SensitiveType.PASSWORD) @JsonSerialize(using = SensitiveJsonSerializer.class) private String password; @Sensitive(SensitiveType.EMAIL) @JsonSerialize(using = SensitiveJsonSerializer.class) private String email; @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss") private LocalDateTime createdAt; }
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4.4 控制器使用示例
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| @RestController @RequestMapping("/api/demo/sensitive") public class SensitiveDemoController {
@GetMapping("/user") public ApiResponse<User> getUserInfo() { User user = new User(); user.setId(1); user.setUsername("张三丰"); user.setPassword("mySecretPassword123"); user.setEmail("zhangsan@example.com"); user.setCreatedAt(LocalDateTime.now()); return ApiResponse.success(user); }
@GetMapping("/sensitive-info") public ApiResponse<SensitiveInfoDemo> getSensitiveInfo() { SensitiveInfoDemo info = new SensitiveInfoDemo(); info.setMobile("13812345678"); info.setIdCard("110101199001011234"); info.setBankCard("6217000123456789012"); info.setAddress("北京市朝阳区三里屯街道1号"); return ApiResponse.success(info); }
public static class SensitiveInfoDemo { @Sensitive(SensitiveType.MOBILE) private String mobile; @Sensitive(SensitiveType.ID_CARD) private String idCard; @Sensitive(SensitiveType.BANK_CARD) private String bankCard; @Sensitive(SensitiveType.ADDRESS) private String address; @Sensitive(value = SensitiveType.CUSTOM, keepStart = 3, keepEnd = 3, maskChar = "#") private String customField = "ThisIsACustomSensitiveField";
} }
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5. 高级特性
5.1 批量脱敏处理
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public static String[] desensitizeBatch(String[] dataArray, SensitiveType type) { if (dataArray == null || dataArray.length == 0) { return dataArray; } String[] result = new String[dataArray.length]; for (int i = 0; i < dataArray.length; i++) { result[i] = desensitize(dataArray[i], type); } return result; }
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5.2 条件脱敏
根据用户角色或权限级别进行条件脱敏:
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public static String desensitizeByRole(String data, SensitiveType type, String userRole) { if ("ADMIN".equals(userRole)) { return data; } return desensitize(data, type); }
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5.3 脱敏规则动态配置
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| @Component public class DynamicSensitiveRuleManager { private final Map<String, SensitiveRule> ruleCache = new ConcurrentHashMap<>();
public void addRule(String fieldName, SensitiveType type, int keepStart, int keepEnd) { SensitiveRule rule = new SensitiveRule(type, keepStart, keepEnd, "*"); ruleCache.put(fieldName, rule); }
public SensitiveRule getRule(String fieldName) { return ruleCache.get(fieldName); }
public static class SensitiveRule { private SensitiveType type; private int keepStart; private int keepEnd; private String maskChar; } }
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5.4 多环境脱敏策略
不同环境使用不同的脱敏策略:
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| sensitive: enabled: false
sensitive: enabled: true enable-log: true enable-json: true
sensitive: enabled: true enable-log: true enable-json: true default-mask-char: "*"
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6. 最佳实践
6.1 注解使用最佳实践
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| @Entity public class UserProfile { @Sensitive(SensitiveType.MOBILE) private String phoneNumber; @Sensitive(value = SensitiveType.CUSTOM, keepStart = 2, keepEnd = 4, maskChar = "#") private String customerCode; @Sensitive(value = SensitiveType.EMAIL, enableLog = false, enableJson = true) private String email; private String idCard; @Sensitive(SensitiveType.NAME) private String nickname; }
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6.2 性能优化策略
缓存脱敏结果
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| @Component public class CachedSensitiveUtil { private final LoadingCache<String, String> cache = Caffeine.newBuilder() .maximumSize(10000) .expireAfterWrite(1, TimeUnit.HOURS) .build(key -> { String[] parts = key.split(":"); SensitiveType type = SensitiveType.valueOf(parts[0]); String data = parts[1]; return SensitiveUtil.desensitize(data, type); }); public String desensitizeWithCache(String data, SensitiveType type) { String key = type.name() + ":" + data; return cache.getUnchecked(key); } }
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异步脱敏处理
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| @Service public class AsyncSensitiveService { @Async("sensitiveExecutor") public CompletableFuture<List<String>> desensitizeBatchAsync(List<String> dataList, SensitiveType type) { List<String> result = dataList.parallelStream() .map(data -> SensitiveUtil.desensitize(data, type)) .collect(Collectors.toList()); return CompletableFuture.completedFuture(result); } }
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6.3 安全性考虑
脱敏结果不可逆
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public class SecureSensitiveUtil { public static String secureDesensitize(String data, SensitiveType type) { String masked = SensitiveUtil.desensitize(data, type); return addSecuritySalt(masked); } public static String reversibleDesensitize(String data) { return "NEVER_IMPLEMENT_THIS"; } private static String addSecuritySalt(String data) { return data + "_SECURE"; } }
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脱敏审计日志
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| @Component public class SensitiveAuditLogger { private static final Logger auditLogger = LoggerFactory.getLogger("SENSITIVE_AUDIT"); public void logDesensitizeOperation(String userId, String fieldName, SensitiveType type) { auditLogger.info("脱敏操作 - 用户: {}, 字段: {}, 类型: {}, 时间: {}", userId, fieldName, type, LocalDateTime.now()); } }
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7. 性能优化
7.1 性能测试结果
我们对脱敏系统进行了性能测试:
| 场景 |
数据量 |
耗时(ms) |
QPS |
| 单条脱敏 |
1 |
0.1 |
10,000 |
| 批量脱敏 |
1,000 |
15 |
66,667 |
| JSON序列化脱敏 |
100对象 |
50 |
2,000 |
| AOP拦截脱敏 |
100对象 |
80 |
1,250 |
7.2 性能优化建议
优化1:减少反射操作
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| @Component public class OptimizedSensitiveProcessor { private final Map<Class<?>, List<FieldInfo>> fieldCache = new ConcurrentHashMap<>(); public Object processObject(Object obj) { Class<?> clazz = obj.getClass(); List<FieldInfo> fields = fieldCache.computeIfAbsent(clazz, this::extractSensitiveFields); for (FieldInfo fieldInfo : fields) { try { String value = (String) fieldInfo.getField().get(obj); String masked = SensitiveUtil.desensitize(value, fieldInfo.getType()); fieldInfo.getField().set(obj, masked); } catch (IllegalAccessException e) { } } return obj; } private List<FieldInfo> extractSensitiveFields(Class<?> clazz) { return Arrays.stream(clazz.getDeclaredFields()) .filter(field -> field.isAnnotationPresent(Sensitive.class)) .filter(field -> field.getType() == String.class) .map(field -> { field.setAccessible(true); Sensitive annotation = field.getAnnotation(Sensitive.class); return new FieldInfo(field, annotation.value()); }) .collect(Collectors.toList()); } private static class FieldInfo { private final Field field; private final SensitiveType type; } }
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优化2:并行处理
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| public class ParallelSensitiveProcessor { public List<String> desensitizeBatch(List<String> dataList, SensitiveType type) { return dataList.parallelStream() .map(data -> SensitiveUtil.desensitize(data, type)) .collect(Collectors.toList()); } }
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8. 故障排查
8.1 常见问题及解决方案
问题1:LocalDateTime 序列化异常
错误信息:
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| Java 8 date/time type `java.time.LocalDateTime` not supported by default
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解决方案:
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| <dependency> <groupId>com.fasterxml.jackson.datatype</groupId> <artifactId>jackson-datatype-jsr310</artifactId> </dependency>
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| @Bean @Primary public ObjectMapper sensitiveObjectMapper() { ObjectMapper objectMapper = new ObjectMapper(); objectMapper.registerModule(new JavaTimeModule()); objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS); return objectMapper; }
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问题2:脱敏功能不生效
可能原因:
排查步骤:
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| @RestController public class SensitiveDebugController { @Autowired private SensitiveConfig.SensitiveProperties sensitiveProperties; @GetMapping("/debug/sensitive-config") public Map<String, Object> debugConfig() { Map<String, Object> config = new HashMap<>(); config.put("enabled", sensitiveProperties.isEnabled()); config.put("enableLog", sensitiveProperties.isEnableLog()); config.put("enableJson", sensitiveProperties.isEnableJson()); config.put("defaultMaskChar", sensitiveProperties.getDefaultMaskChar()); return config; } }
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问题3:性能问题
性能分析:
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| @Component public class SensitivePerformanceMonitor { private static final Logger perfLogger = LoggerFactory.getLogger("PERFORMANCE"); public String monitorDesensitize(String data, SensitiveType type) { long startTime = System.nanoTime(); String result = SensitiveUtil.desensitize(data, type); long duration = System.nanoTime() - startTime; if (duration > 1_000_000) { perfLogger.warn("脱敏操作耗时过长: {}ns, 类型: {}, 数据长度: {}", duration, type, data.length()); } return result; } }
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8.2 监控和告警
脱敏操作监控
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| @Component public class SensitiveMetrics { private final Counter desensitizeCounter = Counter.builder("sensitive.desensitize") .description("脱敏操作计数") .register(Metrics.globalRegistry); private final Timer desensitizeTimer = Timer.builder("sensitive.desensitize.duration") .description("脱敏操作耗时") .register(Metrics.globalRegistry); public String desensitizeWithMetrics(String data, SensitiveType type) { return desensitizeTimer.recordCallable(() -> { desensitizeCounter.increment(Tags.of("type", type.name())); return SensitiveUtil.desensitize(data, type); }); } }
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告警规则配置
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| groups: - name: sensitive_alerts rules: - alert: HighDesensitizeLatency expr: histogram_quantile(0.95, sensitive_desensitize_duration_seconds) > 0.1 for: 5m labels: severity: warning annotations: summary: "脱敏操作延迟过高" description: "95%分位脱敏操作耗时超过100ms" - alert: DesensitizeErrorRate expr: rate(sensitive_desensitize_errors_total[5m]) > 0.01 for: 2m labels: severity: critical annotations: summary: "脱敏操作错误率过高" description: "脱敏操作错误率超过1%"
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