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Fix issue 4167

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This commit is contained in:
TouyamaRie 2025-11-28 16:04:46 +08:00
parent 882f3923ce
commit d821c410c6
2 changed files with 43 additions and 3 deletions
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15
hutool-core/src/main/java/cn/hutool/core/util/HexUtil.java
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@ -379,15 +379,24 @@ public class HexUtil {
* @return 格式化后的字符串 * @return 格式化后的字符串
*/ */
public static String format(final String hexStr, String prefix) { public static String format(final String hexStr, String prefix) {
if (StrUtil.isEmpty(hexStr)) {
return StrUtil.EMPTY;
}
if (null == prefix) { if (null == prefix) {
prefix = StrUtil.EMPTY; prefix = StrUtil.EMPTY;
} }
final int length = hexStr.length(); final int length = hexStr.length();
final StringBuilder builder = StrUtil.builder(length + length / 2 + (length / 2 * prefix.length())); final StringBuilder builder = StrUtil.builder(length + length / 2 + (length / 2 * prefix.length()));
builder.append(prefix).append(hexStr.charAt(0)).append(hexStr.charAt(1));
for (int i = 2; i < length - 1; i += 2) { for (int i = 0; i < length; i++) {
builder.append(CharUtil.SPACE).append(prefix).append(hexStr.charAt(i)).append(hexStr.charAt(i + 1)); if (i % 2 == 0) {
if (i != 0) {
builder.append(CharUtil.SPACE);
}
builder.append(prefix);
}
builder.append(hexStr.charAt(i));
} }
return builder.toString(); return builder.toString();
} }

31
hutool-core/src/test/java/cn/hutool/core/util/HexUtilTest.java
View File

@ -116,4 +116,35 @@ public class HexUtilTest {
final String hex3 = "#FF"; final String hex3 = "#FF";
assertEquals(new BigInteger("FF", 16), HexUtil.toBigInteger(hex3)); assertEquals(new BigInteger("FF", 16), HexUtil.toBigInteger(hex3));
} }
@Test
public void testFormatEmpty() {
String result = HexUtil.format("");
assertEquals("", result);
}
@Test
public void testFormatSingleChar() {
String result = HexUtil.format("1");
assertEquals("1", result);
}
@Test
public void testFormatOddLength() {
String result = HexUtil.format("123");
assertEquals("12 3", result);
}
@Test
public void testFormatWithPrefixSingleChar() {
String result = HexUtil.format("1", "0x");
assertEquals("0x1", result);
}
@Test
public void testFormatWithPrefixOddLength() {
String result = HexUtil.format("123", "0x");
assertEquals("0x12 0x3", result);
}
} }