增加MetroHash算法

hutool-core/src/test/java/cn/hutool/core/lang/MetroHashTest.java

@@ -0,0 +1,81 @@
+package cn.hutool.core.lang;
+
+
+import cn.hutool.core.lang.hash.CityHash;
+import cn.hutool.core.lang.hash.MetroHash;
+import org.junit.Test;
+
+import java.util.Random;
+
+public class MetroHashTest {
+
+
+	/**
+	 * 数据量越大 MetroHash 优势越明显，
+	 */
+	@Test
+	public void bulkHashing64Test() {
+		String[] strArray = getRandomStringArray(10000000);
+		long startCity = System.currentTimeMillis();
+		for (String s : strArray) {
+			CityHash.hash64(s.getBytes());
+		}
+		long endCity = System.currentTimeMillis();
+
+		long startMetro = System.currentTimeMillis();
+		for (String s : strArray) {
+			MetroHash.hash64(s);
+		}
+		long endMetro = System.currentTimeMillis();
+
+		System.out.println("metroHash =============" + (endMetro - startMetro));
+		System.out.println("cityHash =============" + (endCity - startCity));
+	}
+
+
+	/**
+	 * 数据量越大 MetroHash 优势越明显，
+	 */
+	@Test
+	public void bulkHashing128Test() {
+		String[] strArray = getRandomStringArray(10000000);
+		long startCity = System.currentTimeMillis();
+		for (String s : strArray) {
+			CityHash.hash128(s.getBytes());
+		}
+		long endCity = System.currentTimeMillis();
+
+		long startMetro = System.currentTimeMillis();
+		for (String s : strArray) {
+			MetroHash.hash128(s);
+		}
+		long endMetro = System.currentTimeMillis();
+
+		System.out.println("metroHash =============" + (endMetro - startMetro));
+		System.out.println("cityHash =============" + (endCity - startCity));
+	}
+
+
+	private static String[] getRandomStringArray(int length) {
+		String[] result = new String[length];
+		Random random = new Random();
+		int index = 0;
+		while (index < length) {
+			result[index++] = getRandomString(random.nextInt(64));
+		}
+		return result;
+	}
+
+	private static String getRandomString(int length) {
+		String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+		Random random = new Random();
+		StringBuffer sb = new StringBuffer();
+		for (int i = 0; i < length; i++) {
+			int number = random.nextInt(62);
+			sb.append(str.charAt(number));
+		}
+		return sb.toString();
+	}
+
+
+}