SpringBoot2集成Log4j2并实现日志脱敏

野性酷女 2023-06-15 13:24 18阅读 0赞

最近在搭建springCloud项目，正好这个废了我点时间，也就记录下来，防止下次使用，也为了方便别人

首先是**pom.xml**配置：

删除springBoot自己的logback，导入log4j2

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
                <exclusions>
                    <exclusion>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-starter-logging</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-log4j2</artifactId>
            </dependency>

然后创建咱们的**log4j2.xml**配置文件：

<?xml version="1.0" encoding="UTF-8"?>
    
    
    
    <Configuration status="info">
    	<Appenders>
    		
    		<Console name="Console" target="SYSTEM_OUT">
    			<PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS}]%p[%t]%c{1}|%m%n" />
    		</Console>
    
    		
    		
    		<RollingRandomAccessFile name="DetailRollingFile" fileName="log/consumer/consumer_detail.log" filePattern="log/consumer/consumer_detail.log.%d{yyyyMMddHH}" immediateFlush="true">
    			
    			<ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
    			
    			<Log4jEncodeLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS}]%p[%t]%c{1}|%m%n" charset="UTF-8"/>
    			
    			<Policies>
    				
    				<TimeBasedTriggeringPolicy interval="1"/>
    			</Policies>
    		</RollingRandomAccessFile>
    		
    		<RollingRandomAccessFile name="MpspRollingFile" fileName="log/consumer/consumer_mpsp.log" filePattern="log/consumer/consumer_mpsp.log.%d{yyyyMMddHH}">
    			<ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
    			<PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS}]%m%n"/>
    			<Policies>
    				<TimeBasedTriggeringPolicy interval="1"/>
    			</Policies>
    			
    			
    		</RollingRandomAccessFile>
    		
    		<RollingRandomAccessFile name="ssRollingLog" fileName="log/consumer/ss.log" filePattern="log/consumer/ss.log.%d{yyyyMMddHH}">
    			<ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
    			<PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS}]%m%n"/>
    			<Policies>
    				<TimeBasedTriggeringPolicy interval="1"/>
    			</Policies>
    		</RollingRandomAccessFile>
    		
    		<RollingRandomAccessFile name="mpspRollingLog" fileName="log/consumer/mpsp.log" filePattern="log/consumer/mpsp.log.%d{yyyyMMddHH}">
    			<ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
    			<PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS}]%m%n"/>
    			<Policies>
    				<TimeBasedTriggeringPolicy interval="1"/>
    			</Policies>
    		</RollingRandomAccessFile>
    	</Appenders>
    
    	
    	<Loggers>
    		
    		<Logger name="payGateMpspLog" level="INFO" additivity="false">
    			<AppenderRef ref="MpspRollingFile" />
    		</Logger>
    		<Logger name="mpspLog" level="INFO" additivity="false">
    			<AppenderRef ref="mpspRollingLog" />
    		</Logger>
    		<Logger name="ssLog" level="INFO" additivity="false">
    			<AppenderRef ref="ssRollingLog" />
    		</Logger>
    		<Logger name="payGateBusiLog" level="INFO" additivity="false">
    			<AppenderRef ref="DetailRollingFile" />
    		</Logger>
    		<Logger name="com" level="INFO" additivity="false">
    			<AppenderRef ref="DetailRollingFile" />
    		</Logger>
    		<Logger name="com" level="INFO" additivity="false">
    			<AppenderRef ref="DetailRollingFile" />
    		</Logger>
    		<Root level="info">
    			<AppenderRef ref="Console" />
    		</Root>
    	</Loggers>
    </Configuration>

**这里要注意！！！**

由于我的是要实现日志脱敏的，所以，详细日志的打印格式，我是自己定义的，并不是   **PatternLayout**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xqeTk1MDkxNA_size_16_color_FFFFFF_t_70][]

如果只想要实现集成，则需要改正。

如果对xml配置项不太懂得，请参考这篇文章：[https://www.cnblogs.com/hafiz/p/6170702.html][https_www.cnblogs.com_hafiz_p_6170702.html]    写的挺不错的

接下来是实现日志脱敏，说白了，就是匹配正则表达式，将value值更换为\*\*\*\*\*\*\*\*

这里是实现类代码：

package com.umpay.utils;
    
    import java.nio.charset.Charset;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    import com.umpay.utils.StringUtils;
    import org.apache.logging.log4j.core.Layout;
    import org.apache.logging.log4j.core.LogEvent;
    import org.apache.logging.log4j.core.config.Node;
    import org.apache.logging.log4j.core.config.plugins.Plugin;
    import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
    import org.apache.logging.log4j.core.config.plugins.PluginFactory;
    import org.apache.logging.log4j.core.layout.AbstractStringLayout;
    import org.apache.logging.log4j.core.layout.PatternLayout;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    
    /**
     * log4j1.x重写log4j的PatternLayout，实现日志信息中敏感信息的编码或加密
     * log4j2.x重写log4j的AbstractStringLayout，实现日志信息中敏感信息的编码或加密
     */
    @Plugin(name = "Log4jEncodeLayout", category = Node.CATEGORY, elementType = Layout.ELEMENT_TYPE, printObject = true)
    public class Log4jEncodeLayout extends AbstractStringLayout {
    
    	private PatternLayout patternLayout;
    
    	protected Log4jEncodeLayout(Charset charset, String pattern) {
    		super(charset);
    		patternLayout = PatternLayout.newBuilder().withPattern(pattern).build();
    		init();
    	}
    
    	private static final Logger log = LoggerFactory.getLogger(Log4jEncodeLayout.class);
    
    	/** 要匹配的正则表达式（身份证/银行卡） */
    	private Pattern patternChar;
    	/** 要匹配的正则表达式（姓名） */
    	private Pattern namepatternChar;
    
    	private Pattern cvvpatternChar;
    	private int keys_length_char;// 要匹配关键字的数目
    	private int keys_cvv_length_char;// 要匹配关键字的数目
    	private String[] charKeys;
    	private String[] cvvcharKeys;
    
    	private void init() {
    //		String str_char_keys = YamlConfigurerUtil.getStrYmlVal("umfWeChatCore.logLayout", "");
    		String str_char_keys = StringUtils.trim(YmlUtils.getCommonYml("umfWeChatCore.logLayout"));
    		StringBuffer charSbf = new StringBuffer();
    		StringBuffer cvvSbf = new StringBuffer();
    		String cvv_char_keys = "";
    
    		if (StringUtils.isEmpty(str_char_keys)) {// 没有配置log4j.char.keys，不需要替换*
    			return;
    		}
    
    		// 2、区分脱敏字段配置规则
    		// 把带[]的脱敏字段放入到cvvSbf中，其他脱敏字段放入到charSbf中
    		String[] charKeysStrs = str_char_keys.split(",");// 读取配置中要加密的key
    		for (int i = 0; i < charKeysStrs.length; i++) {
    			if (isOptional(charKeysStrs[i])) {
    				// 带[]的脱敏字段
    				cvvSbf.append(charKeysStrs[i].substring(1, charKeysStrs[i].length() - 1) + ",");
    			} else {
    				charSbf.append(charKeysStrs[i] + ",");
    			}
    		}
    		str_char_keys = charSbf.toString();
    		cvv_char_keys = cvvSbf.toString();
    		// 去掉拼转好的字符串最后一个逗号“，”
    		if (StringUtils.isNotEmpty(str_char_keys) && str_char_keys.length() > 0) {
    			str_char_keys = str_char_keys.substring(0, str_char_keys.length() - 1);
    		}
    		if (StringUtils.isNotEmpty(cvv_char_keys) && cvv_char_keys.length() > 0) {
    			cvv_char_keys = cvv_char_keys.substring(0, cvv_char_keys.length() - 1);
    		}
    
    		// 3、组织需要脱敏字段的正则表达式
    		if (str_char_keys.length() > 0) {
    			charKeys = str_char_keys.split(",");// 读取配置中要加密的key
    			StringBuffer sbRegChar = new StringBuffer();
    			sbRegChar.append("(");
    			for (int i = 0; i < charKeys.length; i++) {
    				sbRegChar.append("(");
    				sbRegChar.append(charKeys[i]);
    				sbRegChar.append(")");
    				if (i < charKeys.length - 1) {
    					sbRegChar.append("|");
    				}
    			}
    			StringBuffer namesbRegChar = new StringBuffer(sbRegChar);
    			namesbRegChar.append(")(=|:|：|>)([\u4E00-\u9FA5\u00B7]{1,16})(;|,|\\||\\}|]|$|&|<)");
    			// 由于(\\s*\\w+={0,2}) key:value 中value中结尾包括==（base64导致，所以修改该写法）
    			sbRegChar.append(")(=|:|：|>)(\\s*\\w+={0,2})(;|,|\\||\\}|]|$|&|<)");
    
    			namepatternChar = Pattern.compile(namesbRegChar.toString());// 编译正则表达式
    			patternChar = Pattern.compile(sbRegChar.toString());// 编译正则表达式
    			keys_length_char = charKeys.length;
    		}
    
    		if (cvv_char_keys.length() > 0) {
    			cvvcharKeys = cvv_char_keys.split(",");// 读取配置中要加密的key
    			StringBuffer cvvRegChar = new StringBuffer();
    			cvvRegChar.append("(");
    			for (int i = 0; i < cvvcharKeys.length; i++) {
    				cvvRegChar.append("(");
    				cvvRegChar.append(cvvcharKeys[i]);
    				cvvRegChar.append(")");
    				if (i < cvvcharKeys.length - 1) {
    					cvvRegChar.append("|");
    				}
    			}
    			cvvRegChar.append(")(=|:|：|>)(.*?)(;|,|\\||\\}|]|$|&|<)");
    			cvvpatternChar = Pattern.compile(cvvRegChar.toString());// 编译正则表达式
    			keys_cvv_length_char = cvvcharKeys.length;
    		}
    	}
    
    	public static void main(String[] args) {
    		Log4jEncodeLayout log = new Log4jEncodeLayout(null, "");
    	}
    
    	/**
    	 * 对银行卡以及身份证号脱敏处理 1.判断配置文件中是否已经配置需要脱敏字段 2.判断敏感信息内容是否需要处理 2.1 处理银行卡和身份证敏感信息
    	 * 2.2 处理用户姓名敏感信息 2.3 处理需要不展示字段（例如：cvv=123展示为cvv=）
    	 *
    	 * @param @param msg
    	 * @param @return
    	 * @return String
    	 * @throws
    	 */
    	private String dimChar(String msg) {
    		try {
    			// 1.判断配置文件中是否已经配置需要脱敏字段
    			if (keys_length_char <= 0 && keys_cvv_length_char <= 0) {
    				return msg;
    			}
    
    			boolean nameFlag = false;
    			Matcher match = null;
    			StringBuffer sbMsg = new StringBuffer();
    			if (patternChar != null) {
    				match = patternChar.matcher(msg);
    				// 处理要打印的日志信息
    				// 2.判断敏感信息内容是否需要处理
    				while (match.find()) {
    					// 2.1 处理银行卡和身份证敏感信息
    					nameFlag = true;
    					// group(1)匹配key，group(keys_length+2)匹配(=|:|：)，group(keys_length+3)匹配value，group(keys_length+4)匹配(;|,|\\||]|\\)|$)
    					match.appendReplacement(sbMsg, match.group(1)
    							+ match.group(keys_length_char + 2)
    							+ replaceChar(match.group(keys_length_char + 3))
    							+ match.group(keys_length_char + 4));
    				}
    				match.appendTail(sbMsg);// 增加最后一个匹配项后面的值
    			}
    
    			if (namepatternChar != null) {
    				// 2.2 处理用户姓名敏感信息
    				if (nameFlag) {
    					match = namepatternChar.matcher(sbMsg);
    				} else {
    					match = namepatternChar.matcher(msg);
    				}
    				sbMsg = new StringBuffer();
    				while (match.find()) {
    					nameFlag = true;
    					// group(1)匹配key，group(keys_length+2)匹配(=|:|：)，group(keys_length+3)匹配value，group(keys_length+4)匹配(;|,|\\||]|\\)|$)
    					match.appendReplacement(sbMsg,
    							match.group(1)
    									+ match.group(keys_length_char + 2)
    									+ replaceNameChar(match.group(keys_length_char + 3))
    									+ match.group(keys_length_char + 4));
    				}
    				match.appendTail(sbMsg);// 增加最后一个匹配项后面的值
    			}
    
    			if (cvvpatternChar != null) {
    				if (nameFlag) {
    					match = cvvpatternChar.matcher(sbMsg);
    				} else {
    					match = cvvpatternChar.matcher(msg);
    				}
    				sbMsg = new StringBuffer();
    				// 2.3 处理需要不展示字段（例如：cvv=123展示为cvv=）
    				while (match.find()) {
    					// group(1)匹配key，group(keys_length+2)匹配(=|:|：)，group(keys_length+3)匹配value，group(keys_length+4)匹配(;|,|\\||]|\\)|$)
    					match.appendReplacement(
    							sbMsg,
    							match.group(1)
    									+ match.group(keys_cvv_length_char + 2)
    									+ replaceCvvChar(match.group(keys_cvv_length_char + 3))
    									+ match.group(keys_cvv_length_char + 4));
    				}
    				match.appendTail(sbMsg);// 增加最后一个匹配项后面的值
    			}
    			return sbMsg.toString();
    		} catch (Exception e) {
    			// 如果跑出异常为了不影响流程，直接返回原信息
    			log.error(e.getMessage(), e);
    		}
    		return msg;
    	}
    
    	private boolean isOptional(String key) {
    		return key.startsWith("[") && key.endsWith("]");
    	}
    
    	/**
    	 * 日志关键字用* 替换 规则： value <= 6 替换为****** 6 > value <= 12 后四位保留，其他为* value > 12
    	 * 前6位保留 中间* 后4位保留
    	 *
    	 * @param value
    	 * @return
    	 */
    	private static String replaceChar(String value) {
    
    		if (StringUtils.isEmpty(value)) {
    			return "";
    		}
    		if (value.length() <= 6) { // value <= 6 替换为******
    			return lStr("", '*', value.length());
    		} else if (value.length() > 6 && value.length() <= 12) { // 后四位保留，其他为*
    			int valLen = value.length();
    			String replaceHeadStr = value.substring(value.length() - 4);
    			return replaceHeadStr = lStr(replaceHeadStr, '*', valLen);
    		} else if (value.length() > 12) { // 前6位保留 中间* 后4位保留
    			String replaceHeadStr = value.substring(0, 6);
    			String replaceTailStr = value.substring(value.length() - 4);
    			String dimStr = lStr("", '*', value.length() - 10);
    			return replaceHeadStr + dimStr + replaceTailStr;
    		} else {
    			return value;
    		}
    	}
    
    	/**
    	 * 日志姓名关键字替换 保留第一个汉字，后边用*号表示（例如：张三--》张*）
    	 *
    	 * @param @param value
    	 * @param @return
    	 * @return String
    	 * @throws
    	 */
    	private static String replaceNameChar(String value) {
    
    		if (StringUtils.isEmpty(value)) {
    			return "";
    		}
    		String replaceHeadStr = value.substring(0, 1);
    		return replaceHeadStr + lStr("", '*', value.length() - 1);
    	}
    
    	/**
    	 * 日志cvv关键字替换 直接输出空（例如：1608--》）
    	 *
    	 * @param @param value
    	 * @param @return
    	 * @return String
    	 * @throws
    	 */
    	private static String replaceCvvChar(String value) {
    		return "";
    	}
    
    	/*
    	 * 左补长char
    	 */
    	public static String lStr(String s, char ch, int width) {
    		if (s.length() < width) { // 需要前面补'0'
    			while (s.length() < width)
    				s = ch + s;
    		} else { // 需要将高位丢弃
    			s = s.substring(s.length() - width, s.length());
    		}
    		return s;
    	}
    
    	@Override
    	public String toSerializable(LogEvent event) {
    		String message = patternLayout.toSerializable(event);
    		return dimChar(message);
    	}
    
    	@PluginFactory
    	public static Layout createLayout(
    			@PluginAttribute(value = "pattern") final String pattern,
    			// LOG4J2-783 use platform default by default, so do not specify
    			// defaultString for charset
    			@PluginAttribute(value = "charset") final Charset charset) {
    		return new Log4jEncodeLayout(charset, pattern);
    	}
    
    }

这个类，也就是我上面说过的，那个自定义的，至此，实现完成，但是还差个问题就是如何获取配置项的值。

package com.umpay.utils;
    
    import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;
    import org.springframework.core.io.ClassPathResource;
    import org.springframework.core.io.Resource;
    
    import java.util.Properties;
    
    /**
     * 读取配置文件地址
     */
    public class YmlUtils {
        private static String PROPERTY_NAME = "application.yml";
    
        public static Object getCommonYml(Object key){
            Resource resource = new ClassPathResource(PROPERTY_NAME);
            Properties properties = null;
            try {
                YamlPropertiesFactoryBean yamlFactory = new YamlPropertiesFactoryBean();
                yamlFactory.setResources(resource);
                properties =  yamlFactory.getObject();
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
            return properties.get(key);
        }
    }

如果还有哪里写的不对，也有请大佬们批评指正。

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xqeTk1MDkxNA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2019112216230810.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xqeTk1MDkxNA==,size_16,color_FFFFFF,t_70
[https_www.cnblogs.com_hafiz_p_6170702.html]: https://www.cnblogs.com/hafiz/p/6170702.html