RuoYi
2 years ago
1 changed files with 0 additions and 164 deletions
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package com.ruoyi.common.core.utils; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.HashSet; |
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import java.util.Set; |
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import java.util.regex.Matcher; |
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import java.util.regex.Pattern; |
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import com.ruoyi.common.core.text.Convert; |
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import com.ruoyi.common.core.utils.StringUtils; |
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public class ReUtil |
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{ |
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public final static Pattern GROUP_VAR = Pattern.compile("\\$(\\d+)"); |
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/** |
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* 正则中需要被转义的关键字 |
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*/ |
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public final static Set<Character> RE_KEYS = new HashSet<>( |
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Arrays.asList('$', '(', ')', '*', '+', '.', '[', ']', '?', '\\', '^', '{', '}', '|')); |
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/** |
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* 正则替换指定值<br> |
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* 通过正则查找到字符串,然后把匹配到的字符串加入到replacementTemplate中,$1表示分组1的字符串 |
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* |
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* <p> |
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* 例如:原字符串是:中文1234,我想把1234换成(1234),则可以: |
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* |
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* <pre> |
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* ReUtil.replaceAll("中文1234", "(\\d+)", "($1)")) |
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* |
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* 结果:中文(1234) |
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* </pre> |
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* |
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* @param content 文本 |
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* @param regex 正则 |
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* @param replacementTemplate 替换的文本模板,可以使用$1类似的变量提取正则匹配出的内容 |
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* @return 处理后的文本 |
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*/ |
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public static String replaceAll(CharSequence content, String regex, String replacementTemplate) |
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{ |
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final Pattern pattern = Pattern.compile(regex, Pattern.DOTALL); |
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return replaceAll(content, pattern, replacementTemplate); |
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} |
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|
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/** |
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* 正则替换指定值<br> |
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* 通过正则查找到字符串,然后把匹配到的字符串加入到replacementTemplate中,$1表示分组1的字符串 |
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* |
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* @param content 文本 |
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* @param pattern {@link Pattern} |
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* @param replacementTemplate 替换的文本模板,可以使用$1类似的变量提取正则匹配出的内容 |
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* @return 处理后的文本 |
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* @since 3.0.4 |
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*/ |
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public static String replaceAll(CharSequence content, Pattern pattern, String replacementTemplate) |
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{ |
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if (StringUtils.isEmpty(content)) |
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{ |
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return StringUtils.EMPTY; |
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} |
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final Matcher matcher = pattern.matcher(content); |
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boolean result = matcher.find(); |
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if (result) |
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{ |
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final Set<String> varNums = findAll(GROUP_VAR, replacementTemplate, 1, new HashSet<>()); |
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final StringBuffer sb = new StringBuffer(); |
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do |
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{ |
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String replacement = replacementTemplate; |
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for (String var : varNums) |
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{ |
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int group = Integer.parseInt(var); |
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replacement = replacement.replace("$" + var, matcher.group(group)); |
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} |
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matcher.appendReplacement(sb, escape(replacement)); |
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result = matcher.find(); |
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} |
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while (result); |
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matcher.appendTail(sb); |
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return sb.toString(); |
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} |
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return Convert.toStr(content); |
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} |
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/** |
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* 取得内容中匹配的所有结果 |
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* |
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* @param <T> 集合类型 |
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* @param pattern 编译后的正则模式 |
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* @param content 被查找的内容 |
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* @param group 正则的分组 |
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* @param collection 返回的集合类型 |
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* @return 结果集 |
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*/ |
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public static <T extends Collection<String>> T findAll(Pattern pattern, CharSequence content, int group, |
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T collection) |
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{ |
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if (null == pattern || null == content) |
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{ |
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return null; |
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} |
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if (null == collection) |
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{ |
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throw new NullPointerException("Null collection param provided!"); |
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} |
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final Matcher matcher = pattern.matcher(content); |
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while (matcher.find()) |
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{ |
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collection.add(matcher.group(group)); |
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} |
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return collection; |
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} |
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/** |
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* 转义字符,将正则的关键字转义 |
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* |
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* @param c 字符 |
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* @return 转义后的文本 |
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*/ |
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public static String escape(char c) |
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{ |
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final StringBuilder builder = new StringBuilder(); |
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if (RE_KEYS.contains(c)) |
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{ |
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builder.append('\\'); |
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} |
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builder.append(c); |
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return builder.toString(); |
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} |
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/** |
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* 转义字符串,将正则的关键字转义 |
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* |
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* @param content 文本 |
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* @return 转义后的文本 |
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*/ |
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public static String escape(CharSequence content) |
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{ |
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if (StringUtils.isBlank(content)) |
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{ |
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return StringUtils.EMPTY; |
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} |
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final StringBuilder builder = new StringBuilder(); |
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int len = content.length(); |
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char current; |
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for (int i = 0; i < len; i++) |
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{ |
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current = content.charAt(i); |
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if (RE_KEYS.contains(current)) |
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{ |
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builder.append('\\'); |
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} |
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builder.append(current); |
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} |
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return builder.toString(); |
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} |
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} |
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