正则表达式 string.replaceAll替换花括号 报错illegal repetition near index 0
1 String regex = "(\\$|\\#)\\{[^{}]*\\}";//匹配的是#{xxx}或者${xxx} 2 List<WatcherTaskAgentFileMapping> watcherTaskAgentFileMappingList = agentFileQueryDao.queryWatcherAgentFileList(taskId); 3 Map<String, String> paramMap = new HashMap<>(); 4 for (WatcherTaskAgentFileMapping watcherTaskAgentFileMapping : watcherTaskAgentFileMappingList) { 5 Integer count = 1; 6 String fileUrl = watcherTaskAgentFileMapping.getFileUrl(); 7 Pattern p = Pattern.compile(regex); 8 Matcher matcher = p.matcher(fileUrl); 9 while (matcher.find()) { 10 String searchStr = fileUrl.substring(matcher.start(), matcher.end()); 11 if (StringUtils.isEmpty(paramMap.get(searchStr))) { 12 paramMap.put(searchStr, "${参数" + count++ + "}"); 13 } 14 } 15 } 16 if (!CollectionUtils.isEmpty(paramMap)) { 17 String regexAll = "(\\$|\\#)\\{[^{参数}]*\\}";//匹配除$/#{参数x} 外的 $/#{xxx} 18 Pattern p = Pattern.compile(regexAll); 19 for (WatcherTaskAgentFileMapping watcherTaskAgentFileMapping : watcherTaskAgentFileMappingList) { 20 for (String paramKey : paramMap.keySet()) { 21 String fileUrl = watcherTaskAgentFileMapping.getFileUrl(); 22 while (p.matcher(fileUrl).find()) {//因为string.replaceAll(a,b) a 参数，可以单独替换‘{’或者‘}’，如果是字符串{xxx},会报错，但是replace就不会 23 fileUrl = watcherTaskAgentFileMapping.getFileUrl().replace(paramKey, paramMap.get(paramKey)); 24 } 25 watcherTaskAgentFileMapping.setFileUrl(fileUrl); 26 } 27 } 28 }
replaceAll 替换带有花括号的字符串会报错，单独替换前花括号或者后花括号加上转义符不会报错；例如 "{cesi".replaceAll("\\{","a") = acesi
replace 替换带有花括号的字符串不会报错
