001/* 002 * Copyright 2002-2019 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.core; 018 019import org.springframework.lang.Nullable; 020 021/** 022 * Class that exposes the Spring version. Fetches the 023 * "Implementation-Version" manifest attribute from the jar file. 024 * 025 * <p>Note that some ClassLoaders do not expose the package metadata, 026 * hence this class might not be able to determine the Spring version 027 * in all environments. Consider using a reflection-based check instead — 028 * for example, checking for the presence of a specific Spring 5.2 029 * method that you intend to call. 030 * 031 * @author Juergen Hoeller 032 * @since 1.1 033 */ 034public final class SpringVersion { 035 036 private SpringVersion() { 037 } 038 039 040 /** 041 * Return the full version string of the present Spring codebase, 042 * or {@code null} if it cannot be determined. 043 * @see Package#getImplementationVersion() 044 */ 045 @Nullable 046 public static String getVersion() { 047 Package pkg = SpringVersion.class.getPackage(); 048 return (pkg != null ? pkg.getImplementationVersion() : null); 049 } 050 051}