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* 支持将首字母大写
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fjn committed Aug 11, 2021
1 parent bb700d0 commit 21410c8
Showing 1 changed file with 42 additions and 21 deletions.
63 changes: 42 additions & 21 deletions langx-java/src/main/java/com/jn/langx/util/Strings.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1875,6 +1875,27 @@ public String apply(String input) {
return builder.toString();
}

/**
* Ensures the JSON field names begins with an upper case letter.
*/
public static String upperCaseFirstLetter(String name) {
int firstLetterIndex = 0;
int limit = name.length() - 1;
for (; !Character.isLetter(name.charAt(firstLetterIndex)) && firstLetterIndex < limit; ++firstLetterIndex) ;

char firstLetter = name.charAt(firstLetterIndex);
if (Character.isUpperCase(firstLetter)) { //The letter is already uppercased, return the original
return name;
}

char uppercased = Character.toUpperCase(firstLetter);
if (firstLetterIndex == 0) { //First character in the string is the first letter, saves 1 substring
return uppercased + name.substring(1);
}

return name.substring(0, firstLetterIndex) + uppercased + name.substring(firstLetterIndex + 1);
}

/**
* <p>Converts a String to lower case as per {@link String#toLowerCase()}.</p>
* <p>
Expand Down Expand Up @@ -2328,9 +2349,9 @@ public static String truncate(final String str, final int offset, final int maxW
* StringUtils.substring("abc", -4) = "abc"
* </pre>
*
* @param str the String to get the substring from, may be null
* @param start the position to start from, negative means
* count back from the end of the String by this many characters
* @param str the String to get the substring from, may be null
* @param start the position to start from, negative means
* count back from the end of the String by this many characters
* @return substring from start position, {@code null} if null String input
*/
public static String substring(final String str, int start) {
Expand Down Expand Up @@ -2380,13 +2401,13 @@ public static String substring(final String str, int start) {
* StringUtils.substring("abc", -4, 2) = "ab"
* </pre>
*
* @param str the String to get the substring from, may be null
* @param start the position to start from, negative means
* count back from the end of the String by this many characters
* @param end the position to end at (exclusive), negative means
* count back from the end of the String by this many characters
* @param str the String to get the substring from, may be null
* @param start the position to start from, negative means
* count back from the end of the String by this many characters
* @param end the position to end at (exclusive), negative means
* count back from the end of the String by this many characters
* @return substring from start position to end position,
* {@code null} if null String input
* {@code null} if null String input
*/
public static String substring(final String str, int start, int end) {
if (str == null) {
Expand Down Expand Up @@ -2735,17 +2756,17 @@ private static void convertRemainingAccentCharacters(final StringBuilder decompo
//-----------------------------------------------------------------------

/**
* @since 3.4.2
* @param cs1
* @param cs2
* @param ignoreCase 是否忽略大小写
* @return 是否相等
* @since 3.4.2
*/
public static boolean equals(final CharSequence cs1, final CharSequence cs2, boolean ignoreCase) {
if(!ignoreCase){
if (!ignoreCase) {
return equals(cs1, cs2);
}else{
return equalsIgnoreCase(cs1,cs2);
} else {
return equalsIgnoreCase(cs1, cs2);
}
}

Expand Down Expand Up @@ -2900,7 +2921,7 @@ public static int compare(final String str1, final String str2) {
* @see String#compareTo(String)
*/
public static int compare(final String str1, final String str2, final boolean nullIsLess) {
if (Objs.equals(str1,str2)) {
if (Objs.equals(str1, str2)) {
return 0;
}
if (str1 == null) {
Expand Down Expand Up @@ -2991,7 +3012,7 @@ public static int compareIgnoreCase(final String str1, final String str2) {
* @see String#compareToIgnoreCase(String)
*/
public static int compareIgnoreCase(final String str1, final String str2, final boolean nullIsLess) {
if (Objs.equals(str1,str2)) {
if (Objs.equals(str1, str2)) {
return 0;
}
if (str1 == null) {
Expand Down Expand Up @@ -3381,10 +3402,10 @@ public static int lastIndexOf(final CharSequence cs, final CharSequence searchCh
* StringUtils.lastIndexOfIgnoreCase("aabaabaa", "AB") = 4
* </pre>
*
* @param str the CharSequence to check, may be null
* @param searchStr the CharSequence to find, may be null
* @param str the CharSequence to check, may be null
* @param searchStr the CharSequence to find, may be null
* @return the first index of the search CharSequence,
* -1 if no match or {@code null} string input
* -1 if no match or {@code null} string input
* @since 2.5
* @since 3.0 Changed signature from lastIndexOfIgnoreCase(String, String) to lastIndexOfIgnoreCase(CharSequence, CharSequence)
*/
Expand Down Expand Up @@ -3419,11 +3440,11 @@ public static int lastIndexOfIgnoreCase(final CharSequence str, final CharSequen
* StringUtils.lastIndexOfIgnoreCase("aabaabaa", "B", 0) = -1
* </pre>
*
* @param str the CharSequence to check, may be null
* @param searchStr the CharSequence to find, may be null
* @param str the CharSequence to check, may be null
* @param searchStr the CharSequence to find, may be null
* @param startPos the start position
* @return the last index of the search CharSequence (always &le; startPos),
* -1 if no match or {@code null} input
* -1 if no match or {@code null} input
* @since 2.5
* @since 3.0 Changed signature from lastIndexOfIgnoreCase(String, String, int) to lastIndexOfIgnoreCase(CharSequence, CharSequence, int)
*/
Expand Down

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