Java正则表达式循环匹配字符串方式 Java正则表达式循环匹配字符串

正则表达式循环匹配字符串
Java匹配正则表达式大全

我们先举个例子来看看Java匹配正则表达式
匹配表达式的特殊情况

正则表达式循环匹配字符串

public static void main(String[] args) {/*** String str = "[Part 'name=1234567']"; */String targetStr = "where 1=1 [and user_name like '%$user_name$%'][and company_name like '%$company_name$%']"; String[] split = targetStr.split("]"); System.out.println("split==== " + split); String patternStr = "^[\\s\\S]{0,}\\[\\s{0,}and\\s{0,}[\\d\\W\\w]{1,}\\s{0,}[\\w]{1,}\\s{0,}\\W{0,}(\\$.+?\\$)\\W{0,}\\s{0,}\\s{0,}$"; // 正则表达式Pattern pattern = Pattern.compile(patternStr); // 参数：要匹配的目标字符串Map map = new HashMap(); map.put("$user_name$","user_value"); map.put("$company_name$","company_value"); map.put("$school_name$","$school_name$"); /*int groupCount = matcher.groupCount(); System.out.println("groupCount==== " + groupCount); */for (int i = 0; i<=split.length-1; i++) {Matcher matcher = pattern.matcher(split[i]); System.out.println("split[i]==== " + split[i]); boolean b = matcher.find(); if (b) {String key = matcher.group(1); for (Map.Entry m : map.entrySet()){String mapKey = m.getKey(); if (key.equalsIgnoreCase(mapKey)) {System.out.println("key==== " + key ); /*String bigGroup = matcher.group(); System.out.println("bigGroup==== " + bigGroup); */targetStr = targetStr.replace(key,m.getValue()); // System.out.println("targetStr after replace innner==== " + targetStr); }} }//System.out.println("targetStr after replace outer==== " + targetStr); }System.out.println("targetStr after replace final==== " + targetStr); }

Java匹配正则表达式大全 java匹配字符串表达式在我们数据处理方面是及其重要的，现在就把我这几天数据处理比较常用的向大家介绍一下，常规的一些匹配方式就不介绍了，我们来学习一些特殊的

我们先举个例子来看看Java匹配正则表达式

Pattern pattern = Pattern.compile("采购(人名称|人单位|名称).*"); Matcher matcher = pattern.matcher("采购名称乒位"); String dateStr = null; if (matcher.find()) {dateStr = matcher.group(0); System.out.println(dateStr); }

运行结果如下：

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匹配表达式的特殊情况
（1）匹配中文字符

Pattern pattern = Pattern.compile("[\\u4e00-\\u9fa5]"); Matcher matcher = pattern.matcher("2322购购购购232323"); String dateStr = null; if (matcher.find()) {dateStr = matcher.group(0); System.out.println(dateStr); }

运行结果如下：

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（2）匹配从规定字符开始所有非换行字符

Pattern pattern = Pattern.compile("1.*"); Matcher matcher = pattern.matcher("2312购购购购232323"); String dateStr = null; if (matcher.find()) {dateStr = matcher.group(0); System.out.println(dateStr); }

运行结果如图：