优化MD5性能

hutool-crypto/src/main/java/org/dromara/hutool/crypto/digest/DigestUtil.java

@@ -570,7 +570,7 @@ public class DigestUtil {
 	 * @since 4.0.1
 	 */
 	public static Digester digester(final DigestAlgorithm algorithm) {
-		return new Digester(algorithm);
+		return digester(algorithm.getValue());
 	}
 
 	/**

hutool-crypto/src/main/java/org/dromara/hutool/crypto/digest/DigesterFactory.java

@@ -13,39 +13,52 @@
 package org.dromara.hutool.crypto.digest;
 
 import org.dromara.hutool.crypto.SecureUtil;
+import org.dromara.hutool.crypto.provider.GlobalProviderFactory;
 
 import java.security.MessageDigest;
+import java.security.Provider;
 
 /**
- * {@link Digester}创建简单工厂，用于生产{@link Digester}对象
+ * {@link Digester}创建简单工厂，用于生产{@link Digester}对象<br>
+ * 参考Guava方式，工厂负责持有一个原始的{@link MessageDigest}对象，使用时优先通过clone方式创建对象，提高初始化性能。
  *
  * @author looly
  */
 public class DigesterFactory {
 
-	private final MessageDigest prototype;
-	private final boolean cloneSupport;
-
 	/**
 	 * 创建工厂
 	 *
 	 * @param algorithm 算法
 	 * @return DigesterFactory
 	 */
-	public static DigesterFactory of(final String algorithm) {
+	public static DigesterFactory ofJdk(final String algorithm) {
 		return of(SecureUtil.createJdkMessageDigest(algorithm));
 	}
 
+	/**
+	 * 创建工厂，使用{@link GlobalProviderFactory}找到的提供方。
+	 *
+	 * @param algorithm 算法
+	 * @return DigesterFactory
+	 */
+	public static DigesterFactory of(final String algorithm) {
+		return of(SecureUtil.createMessageDigest(algorithm, null));
+	}
+
 	/**
 	 * 创建工厂
 	 *
-	 * @param messageDigest {@link MessageDigest}
+	 * @param messageDigest {@link MessageDigest}，可以通过{@link SecureUtil#createMessageDigest(String, Provider)} 创建
 	 * @return DigesterFactory
 	 */
 	public static DigesterFactory of(final MessageDigest messageDigest) {
 		return new DigesterFactory(messageDigest);
 	}
 
+	private final MessageDigest prototype;
+	private final boolean cloneSupport;
+
 	/**
 	 * 构造
 	 *

hutool-crypto/src/main/java/org/dromara/hutool/crypto/digest/MD5.java

@@ -25,7 +25,9 @@ import java.nio.charset.Charset;
 public class MD5 extends Digester {
 	private static final long serialVersionUID = 1L;
 
-	private static final DigesterFactory FACTORY = DigesterFactory.of(DigestAlgorithm.MD5.getValue());
+	// issue#I6ZIQH
+	// MD5算法不使用BC库，使用JDK默认以提高初始性能
+	private static final DigesterFactory FACTORY = DigesterFactory.ofJdk(DigestAlgorithm.MD5.getValue());
 
 	/**
 	 * 创建MD5实例

hutool-crypto/src/test/java/org/dromara/hutool/crypto/digest/Md5Test.java

@@ -1,5 +1,7 @@
 package org.dromara.hutool.crypto.digest;
 
+import org.dromara.hutool.core.io.IoUtil;
+import org.dromara.hutool.core.thread.ConcurrencyTester;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
@@ -17,4 +19,26 @@ public class Md5Test {
 		Assertions.assertEquals(16, hex16.length());
 		Assertions.assertEquals("cb143acd6c929826", hex16);
 	}
+
+	@Test
+	void md5ThreadSafeTest() {
+		final String text = "Hutool md5 test str";
+		final ConcurrencyTester tester = new ConcurrencyTester(1000);
+		tester.test(()->{
+			final String digest = MD5.of().digestHex(text);
+			Assertions.assertEquals("8060075dd8df47bac3247438e940a728", digest);
+		});
+		IoUtil.closeQuietly(tester);
+	}
+
+	@Test
+	void md5ThreadSafeTest2() {
+		final String text = "Hutool md5 test str";
+		final ConcurrencyTester tester = new ConcurrencyTester(1000);
+		tester.test(()->{
+			final String digest = new Digester("MD5").digestHex(text);
+			Assertions.assertEquals("8060075dd8df47bac3247438e940a728", digest);
+		});
+		IoUtil.closeQuietly(tester);
+	}
 }