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plusone-commons
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使用 StringUtils 的 leftPad 和 rightPad 即可。

feature/net-util
ZhouXY108 2023-06-07 10:45:10 +08:00
parent 9e30ef5580
commit b2374e810b
2 changed files with 0 additions and 65 deletions
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34
src/main/java/xyz/zhouxy/plusone/commons/util/StrUtil.java
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@ -1,34 +0,0 @@
package xyz.zhouxy.plusone.commons.util;
import java.util.Arrays;
public class StrUtil {
public static String fillBefore(String src, int minLength, char c) {
if (src.length() >= minLength) {
return src;
}
char[] result = new char[minLength];
Arrays.fill(result, 0, minLength - src.length(), c);
for (int i = 1; i <= src.length(); i++) {
result[minLength - i] = src.charAt(src.length() - i);
}
return String.valueOf(result);
}
public static String fillAfter(String src, int minLength, char c) {
if (src.length() >= minLength) {
return src;
}
char[] result = new char[minLength];
for (int i = 0; i < src.length(); i++) {
result[i] = src.charAt(i);
}
Arrays.fill(result, src.length(), result.length, c);
return String.valueOf(result);
}
private StrUtil() {
throw new IllegalStateException("Utility class");
}
}

31
src/test/java/xyz/zhouxy/plusone/commons/util/StrUtilTests.java
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@ -1,31 +0,0 @@
package xyz.zhouxy.plusone.commons.util;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class StrUtilTests {
private static final Logger log = LoggerFactory.getLogger(StrUtilTests.class);
@Test
void testFillZero() {
char c = '=';
log.info(StrUtil.fillBefore("1", 6, c));
log.info(StrUtil.fillBefore("12", 6, c));
log.info(StrUtil.fillBefore("123", 6, c));
log.info(StrUtil.fillBefore("1234", 6, c));
log.info(StrUtil.fillBefore("12345", 6, c));
log.info(StrUtil.fillBefore("123456", 6, c));
log.info(StrUtil.fillBefore("1234567", 6, c));
log.info(StrUtil.fillBefore("12345678", 6, c));
log.info(StrUtil.fillAfter("1", 6, c));
log.info(StrUtil.fillAfter("12", 6, c));
log.info(StrUtil.fillAfter("123", 6, c));
log.info(StrUtil.fillAfter("1234", 6, c));
log.info(StrUtil.fillAfter("12345", 6, c));
log.info(StrUtil.fillAfter("123456", 6, c));
log.info(StrUtil.fillAfter("1234567", 6, c));
log.info(StrUtil.fillAfter("12345678", 6, c));
}
}