dubbo StringUtils 源码
dubbo StringUtils 代码
文件路径：/dubbo-common/src/main/java/org/apache/dubbo/common/utils/StringUtils.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.dubbo.common.utils;
import org.apache.dubbo.common.io.UnsafeStringWriter;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import static java.lang.String.valueOf;
import static java.util.Collections.emptySet;
import static java.util.Collections.unmodifiableSet;
import static org.apache.dubbo.common.constants.CommonConstants.COMMA_SEPARATOR;
import static org.apache.dubbo.common.constants.CommonConstants.COMMA_SPLIT_PATTERN;
import static org.apache.dubbo.common.constants.CommonConstants.DOT_REGEX;
import static org.apache.dubbo.common.constants.CommonConstants.GROUP_KEY;
import static org.apache.dubbo.common.constants.CommonConstants.HIDE_KEY_PREFIX;
import static org.apache.dubbo.common.constants.CommonConstants.INTERFACE_KEY;
import static org.apache.dubbo.common.constants.CommonConstants.SEPARATOR_REGEX;
import static org.apache.dubbo.common.constants.CommonConstants.UNDERLINE_SEPARATOR;
import static org.apache.dubbo.common.constants.CommonConstants.VERSION_KEY;
/**
* StringUtils
*/
public final class StringUtils {
public static final String EMPTY_STRING = "";
public static final int INDEX_NOT_FOUND = -1;
public static final String[] EMPTY_STRING_ARRAY = new String[0];
private static final Logger logger = LoggerFactory.getLogger(StringUtils.class);
private static final Pattern KVP_PATTERN = Pattern.compile("([_.a-zA-Z0-9][-_.a-zA-Z0-9]*)[=](.*)"); //key value pair pattern.
private static final Pattern NUM_PATTERN = Pattern.compile("^\\d+$");
private static final Pattern PARAMETERS_PATTERN = Pattern.compile("^\\[((\\s*\\{\\s*[\\w_\\-\\.]+\\s*:\\s*.+?\\s*\\}\\s*,?\\s*)+)\\s*\\]$");
private static final Pattern PAIR_PARAMETERS_PATTERN = Pattern.compile("^\\{\\s*([\\w-_\\.]+)\\s*:\\s*(.+)\\s*\\}$");
private static final int PAD_LIMIT = 8192;
private static final byte[] HEX2B;
/**
* @since 2.7.5
*/
public static final char EQUAL_CHAR = '=';
public static final String EQUAL = valueOf(EQUAL_CHAR);
public static final char AND_CHAR = '&';
public static final String AND = valueOf(AND_CHAR);
public static final char SEMICOLON_CHAR = ';';
public static final String SEMICOLON = valueOf(SEMICOLON_CHAR);
public static final char QUESTION_MASK_CHAR = '?';
public static final String QUESTION_MASK = valueOf(QUESTION_MASK_CHAR);
public static final char SLASH_CHAR = '/';
public static final String SLASH = valueOf(SLASH_CHAR);
public static final char HYPHEN_CHAR = '-';
public static final String HYPHEN = valueOf(HYPHEN_CHAR);
static {
HEX2B = new byte[128];
Arrays.fill(HEX2B, (byte) -1);
HEX2B['0'] = (byte) 0;
HEX2B['1'] = (byte) 1;
HEX2B['2'] = (byte) 2;
HEX2B['3'] = (byte) 3;
HEX2B['4'] = (byte) 4;
HEX2B['5'] = (byte) 5;
HEX2B['6'] = (byte) 6;
HEX2B['7'] = (byte) 7;
HEX2B['8'] = (byte) 8;
HEX2B['9'] = (byte) 9;
HEX2B['A'] = (byte) 10;
HEX2B['B'] = (byte) 11;
HEX2B['C'] = (byte) 12;
HEX2B['D'] = (byte) 13;
HEX2B['E'] = (byte) 14;
HEX2B['F'] = (byte) 15;
HEX2B['a'] = (byte) 10;
HEX2B['b'] = (byte) 11;
HEX2B['c'] = (byte) 12;
HEX2B['d'] = (byte) 13;
HEX2B['e'] = (byte) 14;
HEX2B['f'] = (byte) 15;
}
private StringUtils() {
}
/**
* Gets a CharSequence length or {@code 0} if the CharSequence is
* {@code null}.
*
* @param cs a CharSequence or {@code null}
* @return CharSequence length or {@code 0} if the CharSequence is
* {@code null}.
*/
public static int length(final CharSequence cs) {
return cs == null ? 0 : cs.length();
}
/**
* <p>Repeat a String {@code repeat} times to form a
* new String.</p>
*
* <pre>
* StringUtils.repeat(null, 2) = null
* StringUtils.repeat("", 0) = ""
* StringUtils.repeat("", 2) = ""
* StringUtils.repeat("a", 3) = "aaa"
* StringUtils.repeat("ab", 2) = "abab"
* StringUtils.repeat("a", -2) = ""
* </pre>
*
* @param str the String to repeat, may be null
* @param repeat number of times to repeat str, negative treated as zero
* @return a new String consisting of the original String repeated,
* {@code null} if null String input
*/
public static String repeat(final String str, final int repeat) {
// Performance tuned for 2.0 (JDK1.4)
if (str == null) {
return null;
}
if (repeat <= 0) {
return EMPTY_STRING;
}
final int inputLength = str.length();
if (repeat == 1 || inputLength == 0) {
return str;
}
if (inputLength == 1 && repeat <= PAD_LIMIT) {
return repeat(str.charAt(0), repeat);
}
final int outputLength = inputLength * repeat;
switch (inputLength) {
case 1:
return repeat(str.charAt(0), repeat);
case 2:
final char ch0 = str.charAt(0);
final char ch1 = str.charAt(1);
final char[] output2 = new char[outputLength];
for (int i = repeat * 2 - 2; i >= 0; i--, i--) {
output2[i] = ch0;
output2[i + 1] = ch1;
}
return new String(output2);
default:
final StringBuilder buf = new StringBuilder(outputLength);
for (int i = 0; i < repeat; i++) {
buf.append(str);
}
return buf.toString();
}
}
/**
* <p>Repeat a String {@code repeat} times to form a
* new String, with a String separator injected each time. </p>
*
* <pre>
* StringUtils.repeat(null, null, 2) = null
* StringUtils.repeat(null, "x", 2) = null
* StringUtils.repeat("", null, 0) = ""
* StringUtils.repeat("", "", 2) = ""
* StringUtils.repeat("", "x", 3) = "xxx"
* StringUtils.repeat("?", ", ", 3) = "?, ?, ?"
* </pre>
*
* @param str the String to repeat, may be null
* @param separator the String to inject, may be null
* @param repeat number of times to repeat str, negative treated as zero
* @return a new String consisting of the original String repeated,
* {@code null} if null String input
* @since 2.5
*/
public static String repeat(final String str, final String separator, final int repeat) {
if (str == null || separator == null) {
return repeat(str, repeat);
}
// given that repeat(String, int) is quite optimized, better to rely on it than try and splice this into it
final String result = repeat(str + separator, repeat);
return removeEnd(result, separator);
}
/**
* <p>Removes a substring only if it is at the end of a source string,
* otherwise returns the source string.</p>
*
* <p>A {@code null} source string will return {@code null}.
* An empty ("") source string will return the empty string.
* A {@code null} search string will return the source string.</p>
*
* <pre>
* StringUtils.removeEnd(null, *) = null
* StringUtils.removeEnd("", *) = ""
* StringUtils.removeEnd(*, null) = *
* StringUtils.removeEnd("www.domain.com", ".com.") = "www.domain.com"
* StringUtils.removeEnd("www.domain.com", ".com") = "www.domain"
* StringUtils.removeEnd("www.domain.com", "domain") = "www.domain.com"
* StringUtils.removeEnd("abc", "") = "abc"
* </pre>
*
* @param str the source String to search, may be null
* @param remove the String to search for and remove, may be null
* @return the substring with the string removed if found,
* {@code null} if null String input
*/
public static String removeEnd(final String str, final String remove) {
if (isAnyEmpty(str, remove)) {
return str;
}
if (str.endsWith(remove)) {
return str.substring(0, str.length() - remove.length());
}
return str;
}
/**
* <p>Returns padding using the specified delimiter repeated
* to a given length.</p>
*
* <pre>
* StringUtils.repeat('e', 0) = ""
* StringUtils.repeat('e', 3) = "eee"
* StringUtils.repeat('e', -2) = ""
* </pre>
*
* <p>Note: this method doesn't not support padding with
* <a href="http://www.unicode.org/glossary/#supplementary_character">Unicode Supplementary Characters</a>
* as they require a pair of {@code char}s to be represented.
* If you are needing to support full I18N of your applications
* consider using {@link #repeat(String, int)} instead.
* </p>
*
* @param ch character to repeat
* @param repeat number of times to repeat char, negative treated as zero
* @return String with repeated character
* @see #repeat(String, int)
*/
public static String repeat(final char ch, final int repeat) {
final char[] buf = new char[repeat];
for (int i = repeat - 1; i >= 0; i--) {
buf[i] = ch;
}
return new String(buf);
}
/**
* <p>Strips any of a set of characters from the end of a String.</p>
*
* <p>A {@code null} input String returns {@code null}.
* An empty string ("") input returns the empty string.</p>
*
* <p>If the stripChars String is {@code null}, whitespace is
* stripped as defined by {@link Character#isWhitespace(char)}.</p>
*
* <pre>
* StringUtils.stripEnd(null, *) = null
* StringUtils.stripEnd("", *) = ""
* StringUtils.stripEnd("abc", "") = "abc"
* StringUtils.stripEnd("abc", null) = "abc"
* StringUtils.stripEnd(" abc", null) = " abc"
* StringUtils.stripEnd("abc ", null) = "abc"
* StringUtils.stripEnd(" abc ", null) = " abc"
* StringUtils.stripEnd(" abcyx", "xyz") = " abc"
* StringUtils.stripEnd("120.00", ".0") = "12"
* </pre>
*
* @param str the String to remove characters from, may be null
* @param stripChars the set of characters to remove, null treated as whitespace
* @return the stripped String, {@code null} if null String input
*/
public static String stripEnd(final String str, final String stripChars) {
int end;
if (str == null || (end = str.length()) == 0) {
return str;
}
if (stripChars == null) {
while (end != 0 && Character.isWhitespace(str.charAt(end - 1))) {
end--;
}
} else if (stripChars.isEmpty()) {
return str;
} else {
while (end != 0 && stripChars.indexOf(str.charAt(end - 1)) != INDEX_NOT_FOUND) {
end--;
}
}
return str.substring(0, end);
}
/**
* <p>Replaces all occurrences of a String within another String.</p>
*
* <p>A {@code null} reference passed to this method is a no-op.</p>
*
* <pre>
* StringUtils.replace(null, *, *) = null
* StringUtils.replace("", *, *) = ""
* StringUtils.replace("any", null, *) = "any"
* StringUtils.replace("any", *, null) = "any"
* StringUtils.replace("any", "", *) = "any"
* StringUtils.replace("aba", "a", null) = "aba"
* StringUtils.replace("aba", "a", "") = "b"
* StringUtils.replace("aba", "a", "z") = "zbz"
* </pre>
*
* @param text text to search and replace in, may be null
* @param searchString the String to search for, may be null
* @param replacement the String to replace it with, may be null
* @return the text with any replacements processed,
* {@code null} if null String input
* @see #replace(String text, String searchString, String replacement, int max)
*/
public static String replace(final String text, final String searchString, final String replacement) {
return replace(text, searchString, replacement, -1);
}
/**
* <p>Replaces a String with another String inside a larger String,
* for the first {@code max} values of the search String.</p>
*
* <p>A {@code null} reference passed to this method is a no-op.</p>
*
* <pre>
* StringUtils.replace(null, *, *, *) = null
* StringUtils.replace("", *, *, *) = ""
* StringUtils.replace("any", null, *, *) = "any"
* StringUtils.replace("any", *, null, *) = "any"
* StringUtils.replace("any", "", *, *) = "any"
* StringUtils.replace("any", *, *, 0) = "any"
* StringUtils.replace("abaa", "a", null, -1) = "abaa"
* StringUtils.replace("abaa", "a", "", -1) = "b"
* StringUtils.replace("abaa", "a", "z", 0) = "abaa"
* StringUtils.replace("abaa", "a", "z", 1) = "zbaa"
* StringUtils.replace("abaa", "a", "z", 2) = "zbza"
* StringUtils.replace("abaa", "a", "z", -1) = "zbzz"
* </pre>
*
* @param text text to search and replace in, may be null
* @param searchString the String to search for, may be null
* @param replacement the String to replace it with, may be null
* @param max maximum number of values to replace, or {@code -1} if no maximum
* @return the text with any replacements processed,
* {@code null} if null String input
*/
public static String replace(final String text, final String searchString, final String replacement, int max) {
if (isAnyEmpty(text, searchString) || replacement == null || max == 0) {
return text;
}
int start = 0;
int end = text.indexOf(searchString, start);
if (end == INDEX_NOT_FOUND) {
return text;
}
final int replLength = searchString.length();
int increase = replacement.length() - replLength;
increase = increase < 0 ? 0 : increase;
increase *= max < 0 ? 16 : max > 64 ? 64 : max;
final StringBuilder buf = new StringBuilder(text.length() + increase);
while (end != INDEX_NOT_FOUND) {
buf.append(text, start, end).append(replacement);
start = end + replLength;
if (--max == 0) {
break;
}
end = text.indexOf(searchString, start);
}
buf.append(text.substring(start));
return buf.toString();
}
public static boolean isBlank(CharSequence cs) {
int strLen;
if (cs == null || (strLen = cs.length()) == 0) {
return true;
}
for (int i = 0; i < strLen; i++) {
if (!Character.isWhitespace(cs.charAt(i))) {
return false;
}
}
return true;
}
/**
* is not blank string.
*
* @param cs source string.
* @return is not blank.
*/
public static boolean isNotBlank(CharSequence cs) {
return !isBlank(cs);
}
/**
* Check the cs String whether contains non whitespace characters.
*
* @param cs
* @return
*/
public static boolean hasText(CharSequence cs) {
return !isBlank(cs);
}
/**
* is empty string.
*
* @param str source string.
* @return is empty.
*/
public static boolean isEmpty(String str) {
return str == null || str.isEmpty();
}
/**
* <p>Checks if the strings contain empty or null elements. <p/>
*
* <pre>
* StringUtils.isNoneEmpty(null) = false
* StringUtils.isNoneEmpty("") = false
* StringUtils.isNoneEmpty(" ") = true
* StringUtils.isNoneEmpty("abc") = true
* StringUtils.isNoneEmpty("abc", "def") = true
* StringUtils.isNoneEmpty("abc", null) = false
* StringUtils.isNoneEmpty("abc", "") = false
* StringUtils.isNoneEmpty("abc", " ") = true
* </pre>
*
* @param ss the strings to check
* @return {@code true} if all strings are not empty or null
*/
public static boolean isNoneEmpty(final String... ss) {
if (ArrayUtils.isEmpty(ss)) {
return false;
}
for (final String s : ss) {
if (isEmpty(s)) {
return false;
}
}
return true;
}
/**
* <p>Checks if the strings contain at least on empty or null element. <p/>
*
* <pre>
* StringUtils.isAnyEmpty(null) = true
* StringUtils.isAnyEmpty("") = true
* StringUtils.isAnyEmpty(" ") = false
* StringUtils.isAnyEmpty("abc") = false
* StringUtils.isAnyEmpty("abc", "def") = false
* StringUtils.isAnyEmpty("abc", null) = true
* StringUtils.isAnyEmpty("abc", "") = true
* StringUtils.isAnyEmpty("abc", " ") = false
* </pre>
*
* @param ss the strings to check
* @return {@code true} if at least one in the strings is empty or null
*/
public static boolean isAnyEmpty(final String... ss) {
return !isNoneEmpty(ss);
}
/**
* is not empty string.
*
* @param str source string.
* @return is not empty.
*/
public static boolean isNotEmpty(String str) {
return !isEmpty(str);
}
/**
* if s1 is null and s2 is null, then return true
*
* @param s1 str1
* @param s2 str2
* @return equals
*/
public static boolean isEquals(String s1, String s2) {
if (s1 == null && s2 == null) {
return true;
}
if (s1 == null || s2 == null) {
return false;
}
return s1.equals(s2);
}
/**
* is positive integer or zero string.
*
* @param str a string
* @return is positive integer or zero
*/
public static boolean isNumber(String str) {
return isNotEmpty(str) && NUM_PATTERN.matcher(str).matches();
}
/**
* parse str to Integer(if str is not number or n < 0, then return 0)
*
* @param str a number str
* @return positive integer or zero
*/
public static int parseInteger(String str) {
return isNumber(str) ? Integer.parseInt(str) : 0;
}
/**
* parse str to Long(if str is not number or n < 0, then return 0)
*
* @param str a number str
* @return positive long or zero
*/
public static long parseLong(String str) {
return isNumber(str) ? Long.parseLong(str) : 0;
}
/**
* Returns true if s is a legal Java identifier.<p>
* <a href="http://www.exampledepot.com/egs/java.lang/IsJavaId.html">more info.</a>
*/
public static boolean isJavaIdentifier(String s) {
if (isEmpty(s) || !Character.isJavaIdentifierStart(s.charAt(0))) {
return false;
}
for (int i = 1; i < s.length(); i++) {
if (!Character.isJavaIdentifierPart(s.charAt(i))) {
return false;
}
}
return true;
}
public static boolean isContains(String values, String value) {
return isNotEmpty(values) && isContains(COMMA_SPLIT_PATTERN.split(values), value);
}
public static boolean isContains(String str, char ch) {
return isNotEmpty(str) && str.indexOf(ch) >= 0;
}
public static boolean isNotContains(String str, char ch) {
return !isContains(str, ch);
}
/**
* @param values
* @param value
* @return contains
*/
public static boolean isContains(String[] values, String value) {
if (isNotEmpty(value) && ArrayUtils.isNotEmpty(values)) {
for (String v : values) {
if (value.equals(v)) {
return true;
}
}
}
return false;
}
public static boolean isNumeric(String str, boolean allowDot) {
if (str == null || str.isEmpty()) {
return false;
}
boolean hasDot = false;
int sz = str.length();
for (int i = 0; i < sz; i++) {
if (str.charAt(i) == '.') {
if (hasDot || !allowDot) {
return false;
}
hasDot = true;
continue;
}
if (!Character.isDigit(str.charAt(i))) {
return false;
}
}
return true;
}
/**
* @param e
* @return string
*/
public static String toString(Throwable e) {
UnsafeStringWriter w = new UnsafeStringWriter();
PrintWriter p = new PrintWriter(w);
p.print(e.getClass().getName());
if (e.getMessage() != null) {
p.print(": " + e.getMessage());
}
p.println();
try {
e.printStackTrace(p);
return w.toString();
} finally {
p.close();
}
}
/**
* @param msg
* @param e
* @return string
*/
public static String toString(String msg, Throwable e) {
UnsafeStringWriter w = new UnsafeStringWriter();
w.write(msg + "\n");
PrintWriter p = new PrintWriter(w);
try {
e.printStackTrace(p);
return w.toString();
} finally {
p.close();
}
}
/**
* translate.
*
* @param src source string.
* @param from src char table.
* @param to target char table.
* @return String.
*/
public static String translate(String src, String from, String to) {
if (isEmpty(src)) {
return src;
}
StringBuilder sb = null;
int ix;
char c;
for (int i = 0, len = src.length(); i < len; i++) {
c = src.charAt(i);
ix = from.indexOf(c);
if (ix == -1) {
if (sb != null) {
sb.append(c);
}
} else {
if (sb == null) {
sb = new StringBuilder(len);
sb.append(src, 0, i);
}
if (ix < to.length()) {
sb.append(to.charAt(ix));
}
}
}
return sb == null ? src : sb.toString();
}
/**
* split.
*
* @param ch char.
* @return string array.
*/
public static String[] split(String str, char ch) {
if (isEmpty(str)) {
return EMPTY_STRING_ARRAY;
}
return splitToList0(str, ch).toArray(EMPTY_STRING_ARRAY);
}
private static List<String> splitToList0(String str, char ch) {
List<String> result = new ArrayList<>();
int ix = 0, len = str.length();
for (int i = 0; i < len; i++) {
if (str.charAt(i) == ch) {
result.add(str.substring(ix, i));
ix = i + 1;
}
}
if (ix >= 0) {
result.add(str.substring(ix));
}
return result;
}
/**
* Splits String around matches of the given character.
* <p>
* Note: Compare with {@link StringUtils#split(String, char)}, this method reduce memory copy.
*/
public static List<String> splitToList(String str, char ch) {
if (isEmpty(str)) {
return Collections.emptyList();
}
return splitToList0(str, ch);
}
/**
* Split the specified value to be a {@link Set}
*
* @param value the content to be split
* @param separatorChar a char to separate
* @return non-null read-only {@link Set}
* @since 2.7.8
*/
public static Set<String> splitToSet(String value, char separatorChar) {
return splitToSet(value, separatorChar, false);
}
/**
* Split the specified value to be a {@link Set}
*
* @param value the content to be split
* @param separatorChar a char to separate
* @param trimElements require to trim the elements or not
* @return non-null read-only {@link Set}
* @since 2.7.8
*/
public static Set<String> splitToSet(String value, char separatorChar, boolean trimElements) {
List<String> values = splitToList(value, separatorChar);
int size = values.size();
if (size < 1) { // empty condition
return emptySet();
}
if (!trimElements) { // Do not require to trim the elements
return new LinkedHashSet(values);
}
return unmodifiableSet(values
.stream()
.map(String::trim)
.collect(LinkedHashSet::new, Set::add, Set::addAll));
}
/**
* join string.
*
* @param array String array.
* @return String.
*/
public static String join(String[] array) {
if (ArrayUtils.isEmpty(array)) {
return EMPTY_STRING;
}
StringBuilder sb = new StringBuilder();
for (String s : array) {
sb.append(s);
}
return sb.toString();
}
/**
* join string like javascript.
*
* @param array String array.
* @param split split
* @return String.
*/
public static String join(String[] array, char split) {
if (ArrayUtils.isEmpty(array)) {
return EMPTY_STRING;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < array.length; i++) {
if (i > 0) {
sb.append(split);
}
sb.append(array[i]);
}
return sb.toString();
}
/**
* join string like javascript.
*
* @param array String array.
* @param split split
* @return String.
*/
public static String join(String[] array, String split) {
if (ArrayUtils.isEmpty(array)) {
return EMPTY_STRING;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < array.length; i++) {
if (i > 0) {
sb.append(split);
}
sb.append(array[i]);
}
return sb.toString();
}
public static String join(Collection<String> coll, String split) {
if (CollectionUtils.isEmpty(coll)) {
return EMPTY_STRING;
}
StringBuilder sb = new StringBuilder();
boolean isFirst = true;
for (String s : coll) {
if (isFirst) {
isFirst = false;
} else {
sb.append(split);
}
sb.append(s);
}
return sb.toString();
}
/**
* parse key-value pair.
*
* @param str string.
* @param itemSeparator item separator.
* @return key-value map;
*/
private static Map<String, String> parseKeyValuePair(String str, String itemSeparator) {
String[] tmp = str.split(itemSeparator);
Map<String, String> map = new HashMap<String, String>(tmp.length);
for (int i = 0; i < tmp.length; i++) {
Matcher matcher = KVP_PATTERN.matcher(tmp[i]);
if (!matcher.matches()) {
continue;
}
map.put(matcher.group(1), matcher.group(2));
}
return map;
}
public static String getQueryStringValue(String qs, String key) {
Map<String, String> map = parseQueryString(qs);
return map.get(key);
}
/**
* parse query string to Parameters.
*
* @param qs query string.
* @return Parameters instance.
*/
public static Map<String, String> parseQueryString(String qs) {
if (isEmpty(qs)) {
return new HashMap<String, String>();
}
return parseKeyValuePair(qs, "\\&");
}
public static String getServiceKey(Map<String, String> ps) {
StringBuilder buf = new StringBuilder();
String group = ps.get(GROUP_KEY);
if (isNotEmpty(group)) {
buf.append(group).append('/');
}
buf.append(ps.get(INTERFACE_KEY));
String version = ps.get(VERSION_KEY);
if (isNotEmpty(group)) {
buf.append(':').append(version);
}
return buf.toString();
}
public static String toQueryString(Map<String, String> ps) {
StringBuilder buf = new StringBuilder();
if (ps != null && ps.size() > 0) {
for (Map.Entry<String, String> entry : new TreeMap<String, String>(ps).entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
if (isNoneEmpty(key, value)) {
if (buf.length() > 0) {
buf.append('&');
}
buf.append(key);
buf.append('=');
buf.append(value);
}
}
}
return buf.toString();
}
public static String camelToSplitName(String camelName, String split) {
if (isEmpty(camelName)) {
return camelName;
}
if (!isWord(camelName)) {
// convert Ab-Cd-Ef to ab-cd-ef
if (isSplitCase(camelName, split.charAt(0))) {
return camelName.toLowerCase();
}
// not camel case
return camelName;
}
StringBuilder buf = null;
for (int i = 0; i < camelName.length(); i++) {
char ch = camelName.charAt(i);
if (ch >= 'A' && ch <= 'Z') {
if (buf == null) {
buf = new StringBuilder();
if (i > 0) {
buf.append(camelName, 0, i);
}
}
if (i > 0) {
buf.append(split);
}
buf.append(Character.toLowerCase(ch));
} else if (buf != null) {
buf.append(ch);
}
}
return buf == null ? camelName.toLowerCase() : buf.toString().toLowerCase();
}
private static boolean isSplitCase(String str, char separator) {
if (str == null) {
return false;
}
return str.chars().allMatch(ch -> (ch == separator) || isWord((char) ch));
}
private static boolean isWord(String str) {
if (str == null) {
return false;
}
return str.chars().allMatch(ch -> isWord((char) ch));
}
private static boolean isWord(char ch) {
if ((ch >= 'A' && ch <= 'Z') ||
(ch >= 'a' && ch <= 'z') ||
(ch >= '0' && ch <= '9')) {
return true;
}
return false;
}
/**
* Convert snake_case or SNAKE_CASE to kebab-case.
* <p>
* NOTE: Return itself if it's not a snake case.
*
* @param snakeName
* @param split
* @return
*/
public static String snakeToSplitName(String snakeName, String split) {
String lowerCase = snakeName.toLowerCase();
if (isSnakeCase(snakeName)) {
return replace(lowerCase, "_", split);
}
return snakeName;
}
protected static boolean isSnakeCase(String str) {
return str.contains("_") || str.equals(str.toLowerCase()) || str.equals(str.toUpperCase());
}
/**
* Convert camelCase or snake_case/SNAKE_CASE to kebab-case
*
* @param str
* @param split
* @return
*/
public static String convertToSplitName(String str, String split) {
if (isSnakeCase(str)) {
return snakeToSplitName(str, split);
} else {
return camelToSplitName(str, split);
}
}
public static String toArgumentString(Object[] args) {
StringBuilder buf = new StringBuilder();
for (Object arg : args) {
if (buf.length() > 0) {
buf.append(COMMA_SEPARATOR);
}
if (arg == null || ReflectUtils.isPrimitives(arg.getClass())) {
buf.append(arg);
} else {
try {
buf.append(JsonUtils.getJson().toJson(arg));
} catch (Exception e) {
logger.warn(e.getMessage(), e);
buf.append(arg);
}
}
}
return buf.toString();
}
public static String trim(String str) {
return str == null ? null : str.trim();
}
public static String toURLKey(String key) {
return key.toLowerCase().replaceAll(SEPARATOR_REGEX, HIDE_KEY_PREFIX);
}
public static String toOSStyleKey(String key) {
key = key.toUpperCase().replaceAll(DOT_REGEX, UNDERLINE_SEPARATOR);
if (!key.startsWith("DUBBO_")) {
key = "DUBBO_" + key;
}
return key;
}
public static boolean isAllUpperCase(String str) {
if (str != null && !isEmpty(str)) {
int sz = str.length();
for (int i = 0; i < sz; ++i) {
if (!Character.isUpperCase(str.charAt(i))) {
return false;
}
}
return true;
} else {
return false;
}
}
public static String[] delimitedListToStringArray(String str, String delimiter) {
return delimitedListToStringArray(str, delimiter, (String) null);
}
public static String[] delimitedListToStringArray(String str, String delimiter, String charsToDelete) {
if (str == null) {
return new String[0];
} else if (delimiter == null) {
return new String[]{str};
} else {
List<String> result = new ArrayList();
int pos;
if ("".equals(delimiter)) {
for (pos = 0; pos < str.length(); ++pos) {
result.add(deleteAny(str.substring(pos, pos + 1), charsToDelete));
}
} else {
int delPos;
for (pos = 0; (delPos = str.indexOf(delimiter, pos)) != -1; pos = delPos + delimiter.length()) {
result.add(deleteAny(str.substring(pos, delPos), charsToDelete));
}
if (str.length() > 0 && pos <= str.length()) {
result.add(deleteAny(str.substring(pos), charsToDelete));
}
}
return toStringArray((Collection) result);
}
}
public static String arrayToDelimitedString(Object[] arr, String delim) {
if (ArrayUtils.isEmpty(arr)) {
return "";
} else if (arr.length == 1) {
return nullSafeToString(arr[0]);
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < arr.length; ++i) {
if (i > 0) {
sb.append(delim);
}
sb.append(arr[i]);
}
return sb.toString();
}
}
public static String deleteAny(String inString, String charsToDelete) {
if (isNotEmpty(inString) && isNotEmpty(charsToDelete)) {
StringBuilder sb = new StringBuilder(inString.length());
for (int i = 0; i < inString.length(); ++i) {
char c = inString.charAt(i);
if (charsToDelete.indexOf(c) == -1) {
sb.append(c);
}
}
return sb.toString();
} else {
return inString;
}
}
public static String[] toStringArray(Collection<String> collection) {
return (String[]) collection.toArray(new String[0]);
}
public static String nullSafeToString(Object obj) {
if (obj == null) {
return "null";
} else if (obj instanceof String) {
return (String) obj;
} else {
String str = obj.toString();
return str != null ? str : "";
}
}
/**
* Decode parameters string to map
*
* @param rawParameters format like '[{a:b},{c:d}]'
* @return
*/
public static Map<String, String> parseParameters(String rawParameters) {
if (StringUtils.isBlank(rawParameters)) {
return Collections.emptyMap();
}
Matcher matcher = PARAMETERS_PATTERN.matcher(rawParameters);
if (!matcher.matches()) {
return Collections.emptyMap();
}
String pairs = matcher.group(1);
String[] pairArr = pairs.split("\\s*,\\s*");
Map<String, String> parameters = new HashMap<>();
for (String pair : pairArr) {
Matcher pairMatcher = PAIR_PARAMETERS_PATTERN.matcher(pair);
if (pairMatcher.matches()) {
parameters.put(pairMatcher.group(1), pairMatcher.group(2));
}
}
return parameters;
}
/**
* Encode parameters map to string, like '[{a:b},{c:d}]'
*
* @param params
* @return
*/
public static String encodeParameters(Map<String, String> params) {
if (params == null || params.isEmpty()) {
return null;
}
StringBuilder sb = new StringBuilder();
sb.append('[');
params.forEach((key, value) -> {
// {key:value},
if (hasText(value)) {
sb.append('{').append(key).append(':').append(value).append("},");
}
});
// delete last separator ','
if (sb.charAt(sb.length() - 1) == ',') {
sb.deleteCharAt(sb.length() - 1);
}
sb.append(']');
return sb.toString();
}
public static int decodeHexNibble(final char c) {
// Character.digit() is not used here, as it addresses a larger
// set of characters (both ASCII and full-width latin letters).
byte[] hex2b = HEX2B;
return c < hex2b.length ? hex2b[c] : -1;
}
/**
* Decode a 2-digit hex byte from within a string.
*/
public static byte decodeHexByte(CharSequence s, int pos) {
int hi = decodeHexNibble(s.charAt(pos));
int lo = decodeHexNibble(s.charAt(pos + 1));
if (hi == -1 || lo == -1) {
throw new IllegalArgumentException(String.format(
"invalid hex byte '%s' at index %d of '%s'", s.subSequence(pos, pos + 2), pos, s));
}
return (byte) ((hi << 4) + lo);
}
/**
* Create the common-delimited {@link String} by one or more {@link String} members
*
* @param one one {@link String}
* @param others others {@link String}
* @return <code>null</code> if <code>one</code> or <code>others</code> is <code>null</code>
* @since 2.7.8
*/
public static String toCommaDelimitedString(String one, String... others) {
String another = arrayToDelimitedString(others, COMMA_SEPARATOR);
return isEmpty(another) ? one : one + COMMA_SEPARATOR + another;
}
/**
* Test str whether starts with the prefix ignore case.
*
* @param str
* @param prefix
* @return
*/
public static boolean startsWithIgnoreCase(String str, String prefix) {
if (str == null || prefix == null || str.length() < prefix.length()) {
return false;
}
// return str.substring(0, prefix.length()).equalsIgnoreCase(prefix);
return str.regionMatches(true, 0, prefix, 0, prefix.length());
}
}
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