From 47efb49495a5aec700a14684e62251673a1deb3a Mon Sep 17 00:00:00 2001
From: bwcx_jzy <bwcx_jzy@163.com>
Date: Wed, 14 Jul 2021 22:57:21 +0800
Subject: [PATCH] =?UTF-8?q?ManifestUtil=20=E6=96=B0=E5=A2=9E=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95?=
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---
 .../java/cn/hutool/core/io/ManifestUtil.java  | 36 +++++++++++++++++--
 1 file changed, 34 insertions(+), 2 deletions(-)

diff --git a/hutool-core/src/main/java/cn/hutool/core/io/ManifestUtil.java b/hutool-core/src/main/java/cn/hutool/core/io/ManifestUtil.java
index 818d85d9e..d97b0abc9 100644
--- a/hutool-core/src/main/java/cn/hutool/core/io/ManifestUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/ManifestUtil.java
@@ -1,8 +1,13 @@
 package cn.hutool.core.io;
 
+import cn.hutool.core.util.ClassUtil;
+
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.net.JarURLConnection;
+import java.net.URL;
+import java.net.URLConnection;
 import java.util.jar.JarFile;
 import java.util.jar.Manifest;
 
@@ -16,6 +21,34 @@ import java.util.jar.Manifest;
 public class ManifestUtil {
 	private static final String[] MANIFEST_NAMES = {"Manifest.mf", "manifest.mf", "MANIFEST.MF"};
 
+	/**
+	 * 根据 class 获取 jar 包文件的 Manifest
+	 *
+	 * @param cls 类
+	 * @return Manifest
+	 */
+	public static Manifest getManifest(Class<?> cls) throws IOException {
+		URL url = ClassUtil.getResourceUrl("", cls);
+		JarFile jarFile = null;
+		try {
+			URLConnection connection = url.openConnection();
+			if (connection instanceof JarURLConnection) {
+				JarURLConnection urlConnection = (JarURLConnection) connection;
+				jarFile = urlConnection.getJarFile();
+				return jarFile.getManifest();
+			}
+		} finally {
+			IoUtil.close(jarFile);
+		}
+		return null;
+	}
+
+	/**
+	 * 获取 jar 包文件的 Manifest
+	 *
+	 * @param classpathItem 文件路径
+	 * @return Manifest
+	 */
 	public static Manifest getManifest(File classpathItem) {
 		Manifest manifest = null;
 
@@ -46,8 +79,7 @@ public class ManifestUtil {
 					fis = new FileInputStream(manifestFile);
 					manifest = new Manifest(fis);
 				} catch (final IOException ignore) {
-				}
-				finally {
+				} finally {
 					IoUtil.close(fis);
 				}
 			}