plusone/plusone-commons
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feat: 新增字符串脱敏方法 StringTools#desensitize

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This commit is contained in:
zhouxy108 2025-04-02 10:23:13 +08:00
parent aecf467a95
commit 4154fda36e
2 changed files with 109 additions and 1 deletions
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36
src/main/java/xyz/zhouxy/plusone/commons/util/StringTools.java
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@ -184,6 +184,42 @@ public class StringTools {
return true;
}
/**
* 脱敏
*
* @param src 原字符串
* @param front 前面保留的字符数
* @param end 后面保留的字符数
* @return 脱敏结果
* @since 1.1.0
*/
public static String desensitize(@Nullable final String src, int front, int end) {
return desensitize(src, '*', front, end);
}
/**
* 脱敏
*
* @param src 原字符串
* @param replacedChar 用于替换的字符
* @param front 前面保留的字符数
* @param end 后面保留的字符数
* @return 脱敏结果
* @since 1.1.0
*/
public static String desensitize(@Nullable final String src, char replacedChar, int front, int end) {
if (src == null || src.isEmpty()) {
return EMPTY_STRING;
}
AssertTools.checkArgument(front >= 0 && end >= 0);
AssertTools.checkArgument((front + end) <= src.length(), "需要截取的长度不能大于原字符串长度");
final char[] charArray = src.toCharArray();
for (int i = front; i < charArray.length - end; i++) {
charArray[i] = replacedChar;
}
return String.valueOf(charArray);
}
private StringTools() {
throw new IllegalStateException("Utility class");
}

74
src/test/java/xyz/zhouxy/plusone/commons/util/StringToolsTests.java
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@ -26,6 +26,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
import java.lang.reflect.Constructor;
import java.util.Arrays;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
@SuppressWarnings("null")
@ -184,7 +185,7 @@ class StringToolsTests {
// #region - isURL
// ================================
/**
/**
* TC1: 验证标准HTTP协议URL
*/
@Test
@ -298,6 +299,77 @@ class StringToolsTests {
// #endregion - repeat
// ================================
// ================================
// #region - desensitize
// ================================
@Test
public void desensitize_NullInput_ReturnsEmptyString() {
String result = StringTools.desensitize(null, '#', 2, 2);
Assertions.assertEquals("", result);
}
@Test
public void desensitize_EmptyString_ReturnsEmptyString() {
String result = StringTools.desensitize("", '#', 2, 2);
Assertions.assertEquals("", result);
}
@Test
public void desensitize_NegativeFront_ThrowsException() {
Assertions.assertThrows(IllegalArgumentException.class, () -> {
StringTools.desensitize("123456", '#', -1, 2);
});
}
@Test
public void desensitize_NegativeEnd_ThrowsException() {
Assertions.assertThrows(IllegalArgumentException.class, () -> {
StringTools.desensitize("123456", '#', 2, -1);
});
}
@Test
public void desensitize_FrontPlusEndExceedsLength_ThrowsException() {
Assertions.assertThrows(IllegalArgumentException.class, () -> {
StringTools.desensitize("123456", '#', 3, 4);
});
}
@Test
public void desensitize_ValidInput_ReturnsDesensitizedString() {
String result = StringTools.desensitize("123456", '#', 2, 2);
Assertions.assertEquals("12##56", result);
}
@Test
public void desensitize_FrontZero_ReturnsDesensitizedString() {
String result = StringTools.desensitize("123456", '#', 0, 2);
Assertions.assertEquals("####56", result);
}
@Test
public void desensitize_EndZero_ReturnsDesensitizedString() {
String result = StringTools.desensitize("123456", '#', 2, 0);
Assertions.assertEquals("12####", result);
}
@Test
public void desensitize_FrontAndEndZero_ReturnsDesensitizedString() {
String result = StringTools.desensitize("123456", '#', 0, 0);
Assertions.assertEquals("######", result);
}
@Test
public void desensitize_ValidInput_DefaultReplacedChar_ReturnsDesensitizedString() {
String result = StringTools.desensitize("123456", 2, 2);
Assertions.assertEquals("12**56", result);
}
// ================================
// #endregion - desensitize
// ================================
@Test
void test_constructor_isNotAccessible_ThrowsIllegalStateException() {
Constructor<?>[] constructors = StringTools.class.getDeclaredConstructors();