通过Java修改consul配置（保留注释、保留缩进）

 

 

 

 

 

　　直接上代码了，找了很久也没找到保留注释的三方包，snakeyaml 的缩进一直也有问题，就自己写了个正则方式的

　　consul也没有相关接口，只接受整个的

　　传key和value，替换相应value值，

　　大佬有更好的方法希望能告诉我

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<dependency>     <groupId>com.orbitz.consul</groupId>     <artifactId>consul-client</artifactId>     <version>1.5.3</version> </dependency>

　　

 

 

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String regex = buildRegexForKey(keyToFind); Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.DOTALL); Matcher matcher = pattern.matcher(yamlContent); if(matcher.find()){     String content = matcher.group(0);     String targetLine = this.getLine(keyToFind, content);     if ("".equals(targetLine)) {         // 按原值查询         result = this.findByOriginal(             yamlContent, keyToFind, newValue, result         );         replacement1 = result.getReplacement1();         replacement2 = result.getReplacement2();         addFlag = result.isAddFlag();     } else {         String[] parts = keyToFind.split("\\.");         String param = parts[parts.length -1];         Pair<String, String> pair = this.handleTargetLine(targetLine, param);         // 获取到左右部分，可以赋值         replacement1 = targetLine;         replacement2 = pair.getKey() + " " + newValue;     }   } else {     // 按原值查询     result = this.findByOriginal(             yamlContent, keyToFind, newValue, result     );     replacement1 = result.getReplacement1();     replacement2 = result.getReplacement2();     addFlag = result.isAddFlag(); }   private String buildRegexForKey(String key) {           String[] parts = key.split("\\.");         StringBuilder regexBuilder = new StringBuilder();           // 匹配每个部分的键和冒号，考虑到YAML的缩进         for (int i = 0; i < parts.length; i++) {             if (i == parts.length -1) { // 如果不是第一个部分，添加换行符和缩进                 regexBuilder.append("\\b").append(parts[i]).append(":\\s*");             } else {                 regexBuilder.append("\\b").append(parts[i]).append(":\\s*\\n.*?");             }         } //        regexBuilder.append("[^\\s]+"); // 匹配值直到下一个空白字符或换行符         regexBuilder.append("([^\\n]*)"); // 匹配值直到下一个换行符           return regexBuilder.toString();     } private String getLine(String key, String yamlContent) {         String returnStr = "";         String[] lines = yamlContent.split("\n");         String[] keyParts = key.split("\\.");         int length = keyParts.length;           String lastKey = keyParts[length - 1];           // 步骤1: 找到 'springlm.datasourcelm' 所在行的下面一行         String parentKey;         if (length >= 2) {             parentKey = keyParts[length - 2];         } else {             parentKey = keyParts[length - 1];         }             String nextLine = null;         int indentSpacesCount = 0;           for (int i = 0; i < lines.length; i++) {             String line = lines[i].trim();             if (line.startsWith(parentKey + ":")) {                 // 确保下一行不是空行或注释                 String candidateLine = (i + 1 < lines.length) ? lines[i + 1] : "";                 if (!candidateLine.isEmpty() && !candidateLine.startsWith("#")) {                     nextLine = candidateLine;                     break;                 }             }         }           // 如果没有找到 下一行，则返回null         if (nextLine == null) {             return returnStr;         }           // 步骤2: 获取下一行的空格数量         indentSpacesCount = countLeadingSpaces(nextLine);           // 步骤3: 构建用于匹配目标行的空格字符串         String indentSpaces = buildSpaces(indentSpacesCount);           // 步骤4: 根据空格数量和最后一个.后面的key，获取这个key的所在行         for (String line : lines) {             if (line.startsWith(indentSpaces + lastKey + ":")) {                 return line;             }         }           return returnStr; // 如果没有找到匹配的行，返回null     }       // 辅助方法，用于计算字符串中前导空格的数量     private int countLeadingSpaces(String line) {         int count = 0;         while (count < line.length() && line.charAt(count) == ' ') {             count++;         }         return count;     }       // 辅助方法，用于构建由空格组成的字符串     private String buildSpaces(int count) {         StringBuilder sb = new StringBuilder();         for (int i = 0; i < count; i++) {             sb.append(' ');         }         return sb.toString();     }         public Pair<String, String> handleTargetLine(String line, String key) {         String regex = "(\\s*" + key + ":)\\s+(.+)";         Pattern pattern = Pattern.compile(regex);         Matcher matcher = pattern.matcher(line);           if (matcher.find()) {             String prefix = matcher.group(1); // "urllm:" 及其前面的空格             String url = matcher.group(2);     // URL 的其余部分             return new Pair<>(prefix, url);         } else {             return null; // 或者抛出一个异常，取决于您的错误处理策略         }     }       public UpdateResultDto findByOriginal(             String yamlContent, String keyToFind,             String newValue, UpdateResultDto result     ) { //        String pathRegex = "(\\b" + keyToFind + ")\\s*:\\s*([^\\n]+)";         String pathRegex = "^(" + keyToFind + ")\\s*:\\s*([^\n]+)";         Pattern pathPattern = Pattern.compile(pathRegex, Pattern.MULTILINE);         Matcher pathMatcher = pathPattern.matcher(yamlContent);         String replacement1 = null;         String replacement2 = null;         boolean addFlag = false;           if (pathMatcher.find()) {             replacement1 = pathMatcher.group(0); // 匹配到的整个键值对             replacement2 = keyToFind + ": " + newValue; // 新的键值对         } else {             // 如果没有匹配到，说明是新增             addFlag = true;         }         result.setReplacement1(replacement1);         result.setReplacement2(replacement2);         result.setAddFlag(addFlag);         return result;     }