forked from plusone/plusone-commons
重写 RegexUtil。
parent
59f5a1d17b
commit
fc667e5c72
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@ -16,42 +16,132 @@
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package xyz.zhouxy.plusone.commons.util;
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import javax.annotation.Nullable;
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import xyz.zhouxy.plusone.commons.collection.SafeConcurrentHashMap;
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import java.util.Map;
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import java.util.Objects;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class RegexUtil {
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import javax.annotation.Nullable;
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private static final Map<String, Pattern> PATTERN_CACHE = new SafeConcurrentHashMap<>();
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import com.google.common.base.Preconditions;
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public static Pattern getPattern(final String regex) {
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Objects.requireNonNull(regex);
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return PATTERN_CACHE.computeIfAbsent(regex, Pattern::compile);
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/**
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* 封装一些常用的正则操作，并可以缓存 {@link Pattern} 实例以复用（最多缓存 256 个）。
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*
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* @author ZhouXY
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*
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*/
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public final class RegexUtil {
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private static final int DEFAULT_CACHE_INITIAL_CAPACITY = 64;
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private static final int MAX_CACHE_SIZE = 256;
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private static final ConcurrentHashMap<String, Pattern> PATTERN_CACHE = new ConcurrentHashMap<>(
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DEFAULT_CACHE_INITIAL_CAPACITY);
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/**
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* 获取 {@link Pattern} 实例。
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*
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* @param pattern 正则表达式
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* @param cachePattern 是否缓存 {@link Pattern} 实例
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* @return {@link Pattern} 实例
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*/
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public static Pattern getPattern(final String pattern, final boolean cachePattern) {
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Preconditions.checkNotNull(pattern, "The pattern can not be null.");
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Pattern result = PATTERN_CACHE.get(pattern);
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if (result == null) {
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result = Pattern.compile(pattern);
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if (cachePattern && PATTERN_CACHE.size() < MAX_CACHE_SIZE) {
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PATTERN_CACHE.putIfAbsent(pattern, result);
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result = PATTERN_CACHE.get(pattern);
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}
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}
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return result;
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}
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public static boolean matches(@Nullable CharSequence input, String regex) {
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return matches(input, getPattern(regex));
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/**
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* 获取 {@link Pattern} 实例，不缓存。
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*
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* @param pattern 正则表达式
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* @return {@link Pattern} 实例
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*/
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public static Pattern getPattern(final String pattern) {
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Preconditions.checkNotNull(pattern, "The pattern can not be null.");
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Pattern result = PATTERN_CACHE.get(pattern);
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if (result == null) {
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result = Pattern.compile(pattern);
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}
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return result;
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}
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public static boolean matches(@Nullable CharSequence input, Pattern pattern) {
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Assert.notNull(pattern, "Pattern must not be null.");
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/**
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* 将各个正则表达式转为 {@link Pattern} 实例。
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*
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* @param patterns 正则表达式
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* @param cachePattern 是否缓存 {@link Pattern} 实例
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* @return Pattern 实例数组
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*/
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public static Pattern[] getPatterns(final String[] patterns, final boolean cachePattern) {
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Preconditions.checkNotNull(patterns, "The patterns can not be null.");
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final Pattern[] result = new Pattern[patterns.length];
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for (int i = 0; i < patterns.length; i++) {
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result[i] = getPattern(patterns[i], cachePattern);
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}
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return result;
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}
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/**
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* 将各个正则表达式转为 {@link Pattern} 实例，不缓存。
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*
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* @param patterns 正则表达式
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* @return {@link Pattern} 实例数组
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*/
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public static Pattern[] getPatterns(final String[] patterns) {
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Preconditions.checkNotNull(patterns, "The patterns can not be null.");
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final Pattern[] result = new Pattern[patterns.length];
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for (int i = 0; i < patterns.length; i++) {
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result[i] = getPattern(patterns[i]);
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}
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return result;
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}
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/**
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* 手动缓存 Pattern 实例。
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*
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* @param pattern 要缓存的 {@link Pattern} 实例
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* @return 缓存的 Pattern 实例。如果缓存已满，则返回 {@code null}。
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*/
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public static Pattern cachePattern(final Pattern pattern) {
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if (PATTERN_CACHE.size() >= MAX_CACHE_SIZE) {
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return null;
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}
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final String patternStr = pattern.pattern();
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PATTERN_CACHE.putIfAbsent(patternStr, pattern);
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return PATTERN_CACHE.get(patternStr);
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}
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/**
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* 判断 {@code input} 是否匹配 {@code pattern}。
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*
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* @param input 输入
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* @param pattern 正则
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* @return 判断结果
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*/
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public static boolean matches(@Nullable final CharSequence input, final Pattern pattern) {
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Preconditions.checkNotNull(pattern, "The pattern can not be null.");
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return input != null && pattern.matcher(input).matches();
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}
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public static boolean matchesOr(@Nullable CharSequence input, String... regexes) {
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for (String regex : regexes) {
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if (matches(input, regex)) {
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return true;
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}
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}
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/**
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* 判断 {@code input} 是否匹配 {@code patterns} 中的一个。
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*
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* @param input 输入
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* @param patterns 正则
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* @return 判断结果
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*/
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public static boolean matchOne(@Nullable final CharSequence input, final Pattern[] patterns) {
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Preconditions.checkNotNull(patterns, "The patterns can not be null.");
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if (input == null) {
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return false;
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}
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public static boolean matchesOr(@Nullable CharSequence input, Pattern... patterns) {
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for (Pattern pattern : patterns) {
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if (matches(input, pattern)) {
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return true;
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@ -60,16 +150,18 @@ public class RegexUtil {
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return false;
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}
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public static boolean matchesAnd(@Nullable CharSequence input, String... regexes) {
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for (String regex : regexes) {
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if (!matches(input, regex)) {
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/**
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* 判断 {@code input} 是否匹配全部正则。
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*
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* @param input 输入
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* @param patterns 正则
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* @return 判断结果
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*/
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public static boolean matchAll(@Nullable final CharSequence input, final Pattern[] patterns) {
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Preconditions.checkNotNull(patterns, "The patterns can not be null.");
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if (input == null) {
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return false;
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}
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}
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return true;
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}
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public static boolean matchesAnd(@Nullable CharSequence input, Pattern... patterns) {
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for (Pattern pattern : patterns) {
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if (!matches(input, pattern)) {
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return false;
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@ -78,7 +170,122 @@ public class RegexUtil {
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return true;
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}
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/**
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* 判断 {@code input} 是否匹配 {@code pattern}。
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*
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* @param input 输入
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* @param pattern 正则表达式
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* @param cachePattern 是否缓存 {@link Pattern} 实例
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* @return 判断结果
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*/
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public static boolean matches(@Nullable final CharSequence input, final String pattern,
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final boolean cachePattern) {
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return matches(input, getPattern(pattern, cachePattern));
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}
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/**
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* 判断 {@code input} 是否匹配 {@code pattern}。不缓存 {@link Pattern} 实例。
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*
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* @param input 输入
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* @param pattern 正则表达式
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* @return 判断结果
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*/
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public static boolean matches(@Nullable final CharSequence input, final String pattern) {
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return matches(input, getPattern(pattern));
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}
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/**
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* 判断 {@code input} 是否匹配 {@code patterns} 中的一个。
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*
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* @param input 输入
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* @param patterns 正则表达式
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* @param cachePattern 是否缓存 {@link Pattern} 实例
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* @return 判断结果
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*/
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public static boolean matchOne(@Nullable final CharSequence input, final String[] patterns,
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final boolean cachePattern) {
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final Pattern[] patternSet = getPatterns(patterns, cachePattern);
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return matchOne(input, patternSet);
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}
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/**
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* 判断 {@code input} 是否匹配 {@code patterns} 中的一个。不缓存 {@link Pattern} 实例。
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*
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* @param input 输入
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* @param patterns 正则表达式
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* @return 判断结果
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*/
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public static boolean matchOne(@Nullable final CharSequence input, final String[] patterns) {
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final Pattern[] patternSet = getPatterns(patterns);
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return matchOne(input, patternSet);
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}
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/**
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* 判断 {@code input} 是否匹配全部正则。
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*
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* @param input 输入
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* @param patterns 正则表达式
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* @param cachePattern 是否缓存 {@link Pattern} 实例
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* @return 判断结果
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*/
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public static boolean matchAll(@Nullable final CharSequence input, final String[] patterns,
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final boolean cachePattern) {
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final Pattern[] patternSet = getPatterns(patterns, cachePattern);
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return matchAll(input, patternSet);
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}
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/**
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* 判断 {@code input} 是否匹配全部正则。不缓存 {@link Pattern} 实例。
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*
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* @param input 输入
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* @param patterns 正则表达式
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* @return 判断结果
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*/
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public static boolean matchAll(@Nullable final CharSequence input, final String[] patterns) {
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final Pattern[] patternSet = getPatterns(patterns);
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return matchAll(input, patternSet);
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}
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/**
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* 生成匹配器。
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*
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* @param input 输入
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* @param pattern 正则
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* @return 结果
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*/
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public static Matcher getMatcher(final CharSequence input, final Pattern pattern) {
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Preconditions.checkNotNull(input, "The input can not be null");
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Preconditions.checkNotNull(pattern, "The pattern can not be null");
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return pattern.matcher(input);
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}
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/**
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* 生成匹配器。
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*
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* @param input 输入
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* @param pattern 正则表达式
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* @param cachePattern 是否缓存 {@link Pattern} 实例
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* @return 结果
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*/
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public static Matcher getMatcher(final CharSequence input, final String pattern, boolean cachePattern) {
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Preconditions.checkNotNull(input, "The input can not be null");
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return getPattern(pattern, cachePattern).matcher(input);
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}
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/**
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* 生成匹配器。不缓存 {@link Pattern} 实例。
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*
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* @param input 输入
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* @param pattern 正则表达式
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* @return 结果
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*/
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public static Matcher getMatcher(final CharSequence input, final String pattern) {
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Preconditions.checkNotNull(input, "The input can not be null");
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return getPattern(pattern).matcher(input);
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}
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private RegexUtil() {
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// 不允许实例化
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throw new IllegalStateException("Utility class");
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}
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}
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