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add lowerAt and upperAt

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This commit is contained in:
Looly 2023-12-05 12:27:33 +08:00
parent d5196ff687
commit 42e3c66af9
2 changed files with 49 additions and 49 deletions
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75
hutool-core/src/main/java/org/dromara/hutool/core/text/CharSequenceUtil.java
View File

@ -3305,65 +3305,60 @@ public class CharSequenceUtil extends StrValidator {
}
/**
* 方法注释: <br>
* 〈大写对应下标字母〉
* 大写对应下标字母
*
* <pre>例如: str = name,index = 1, return nAme</pre>
*
* <p>搜索关键字:</p>
* <tag>大写</tag>
* <tag>大写下标</tag>
* <tag>大写字母</tag>
* <tag>大小写</tag>
*
* @param str 字符串
* @param index 下标
* @return java.lang.String 字符串
* @param index 下标，支持负数，-1表示最后一个字符
* @return 字符串
*/
public static String upperIndex(final CharSequence str, final int index) {
if (str == null) {
public static String upperAt(final CharSequence str, int index) {
if (null == str) {
return null;
}
if (str.length() > 0) {
final char charredAt = str.charAt(index);
if (Character.isLowerCase(charredAt)) {
return subPre(str, index) + Character.toUpperCase(charredAt) + subSuf(str, index + 1);
}
// 支持负数
final int length = str.length();
if (index < 0) {
index += length;
}
if (index < 0 || index >= length) {
return str.toString();
}
final char c = str.charAt(index);
if (Character.isLowerCase(c)) {
return subPre(str, index) + Character.toUpperCase(c) + subSuf(str, index + 1);
}
return str.toString();
}
/**
* 方法注释: <br>
* 〈小写对应下标字母〉
*
* <pre>例如: str = NAME,index = 1, return NaME</pre>
*
* <p>搜索关键字:</p>
* <tag>小写</tag>
* <tag>小写下标</tag>
* <tag>小写字母</tag>
* <tag>大小写</tag>
* 小写对应下标字母<br>
* 例如: str = NAME,index = 1, return NaME
*
* @param str 字符串
* @param index 下标
* @return java.lang.String 字符串
* @param index 下标，支持负数，-1表示最后一个字符
* @return 字符串
*/
public static String lowerIndex(final CharSequence str, final int index) {
public static String lowerAt(final CharSequence str, int index) {
if (str == null) {
return null;
}
if (str.length() > 0) {
final char charredAt = str.charAt(index);
if (Character.isUpperCase(charredAt)) {
return subPre(str, index) + Character.toLowerCase(charredAt) + subSuf(str, index + 1);
}
// 支持负数
final int length = str.length();
if (index < 0) {
index += length;
}
if (index < 0 || index >= length) {
return str.toString();
}
final char c = str.charAt(index);
if (Character.isUpperCase(c)) {
return subPre(str, index) + Character.toLowerCase(c) + subSuf(str, index + 1);
}
return str.toString();
@ -3378,7 +3373,7 @@ public class CharSequenceUtil extends StrValidator {
* @return 字符串
*/
public static String upperFirst(final CharSequence str) {
return upperIndex(str, 0);
return upperAt(str, 0);
}
/**
@ -3389,7 +3384,7 @@ public class CharSequenceUtil extends StrValidator {
* @return 字符串
*/
public static String lowerFirst(final CharSequence str) {
return lowerIndex(str, 0);
return lowerAt(str, 0);
}
// endregion

23
hutool-core/src/test/java/org/dromara/hutool/core/text/CharSequenceUtilTest.java
View File

@ -117,6 +117,12 @@ public class CharSequenceUtilTest {
Assertions.assertEquals(41, v.getBytes(CharsetUtil.GBK).length);
}
@Test
void subPreTest() {
final String pre = CharSequenceUtil.subPre("abc", 0);
Assertions.assertEquals(StrUtil.EMPTY, pre);
}
@Test
public void startWithTest() {
// https://gitee.com/dromara/hutool/issues/I4MV7Q
@ -337,32 +343,31 @@ public class CharSequenceUtilTest {
}
@Test
public void upperIndexTest() {
void upperAtTest() {
final StringBuilder sb = new StringBuilder("key");
final String s1 = CharSequenceUtil.upperIndex(sb, 0);
final String s1 = CharSequenceUtil.upperAt(sb, 0);
Assertions.assertEquals("Key", s1);
final String s2 = CharSequenceUtil.upperIndex(sb, 1);
final String s2 = CharSequenceUtil.upperAt(sb, 1);
Assertions.assertEquals("kEy", s2);
final String s3 = CharSequenceUtil.upperIndex(sb, 2);
final String s3 = CharSequenceUtil.upperAt(sb, 2);
Assertions.assertEquals("keY", s3);
}
@Test
public void lowerIndexTest() {
void lowerAtTest() {
final StringBuilder sb = new StringBuilder("KEY");
final String s1 = CharSequenceUtil.lowerIndex(sb, 0);
final String s1 = CharSequenceUtil.lowerAt(sb, 0);
Assertions.assertEquals("kEY", s1);
final String s2 = CharSequenceUtil.lowerIndex(sb, 1);
final String s2 = CharSequenceUtil.lowerAt(sb, 1);
Assertions.assertEquals("KeY", s2);
final String s3 = CharSequenceUtil.lowerIndex(sb, 2);
final String s3 = CharSequenceUtil.lowerAt(sb, 2);
Assertions.assertEquals("KEy", s3);
}
}