DataSizeUtil改进，兼容GiB等单位名称（issue#ICXXVF@Github）

hutool-core/src/main/java/cn/hutool/v7/core/io/unit/DataSize.java

@@ -44,7 +44,7 @@ public final class DataSize implements Comparable<DataSize> {
 	/**
 	 * The pattern for parsing.
 	 */
-	private static final Pattern PATTERN = Pattern.compile("^([+-]?\\d+(\\.\\d+)?)([a-zA-Z]{0,2})$");
+	private static final Pattern PATTERN = Pattern.compile("^([+-]?\\d+(\\.\\d+)?)([a-zA-Z]{0,3})$");
 
 	/**
 	 * Bytes per Kilobyte(KB).

hutool-core/src/main/java/cn/hutool/v7/core/io/unit/DataUnit.java

@@ -16,6 +16,7 @@
 
 package cn.hutool.v7.core.io.unit;
 
+import cn.hutool.v7.core.text.CharUtil;
 import cn.hutool.v7.core.text.StrUtil;
 
 /**
@@ -105,11 +106,16 @@ public enum DataUnit {
 	/**
 	 * 通过后缀返回对应的 DataUnit
 	 *
-	 * @param suffix 单位后缀
+	 * @param suffix 单位后缀，如KB、GB、GiB等
 	 * @return 匹配到的{@link DataUnit}
 	 * @throws IllegalArgumentException 后缀无法识别报错
 	 */
-	public static DataUnit fromSuffix(final String suffix) {
+	public static DataUnit fromSuffix(String suffix) {
+		// issue#ICXXVF 兼容KiB、MiB、GiB
+		if(StrUtil.length(suffix) == 3 && CharUtil.equals(suffix.charAt(1), 'i', true)){
+			suffix = new String(new char[]{suffix.charAt(0), suffix.charAt(2)});
+		}
+
 		for (final DataUnit candidate : values()) {
 			// 支持类似于 3MB，3M，3m等写法
 			if (StrUtil.startWithIgnoreCase(candidate.suffix, suffix)) {

hutool-core/src/test/java/cn/hutool/v7/core/io/unit/DataSizeUtilTest.java

@@ -83,4 +83,10 @@ public class DataSizeUtilTest {
 		final long bytes = DataSize.parse(size).toBytes();
 		Assertions.assertEquals(10244587, bytes);
 	}
+
+	@Test
+	void issueICXXVFTest(){
+		final long parse = DataSizeUtil.parse("279.40GiB");
+		Assertions.assertEquals(300003465625L, parse);
+	}
 }