diff --git a/CHANGELOG.md b/CHANGELOG.md
index bbcd3b523..4989e0187 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.7.0 (2021-06-12)
+# 5.7.0 (2021-06-13)
 
 ### 🐣新特性
 * 【jwt    】     添加JWT模块，实现了JWT的创建、解析和验证
@@ -16,6 +16,7 @@
 
 ### 🐞Bug修复
 * 【db     】     修复count方法丢失参数问题(issue#I3VBSL@Gitee)
+* 【db     】     修复SpringUtil工具在`@PostConstruct` 注解标注的方法下失效问题(pr#341@Gitee)
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/hutool-cache/src/test/java/cn/hutool/cache/test/CacheConcurrentTest.java b/hutool-cache/src/test/java/cn/hutool/cache/CacheConcurrentTest.java
similarity index 97%
rename from hutool-cache/src/test/java/cn/hutool/cache/test/CacheConcurrentTest.java
rename to hutool-cache/src/test/java/cn/hutool/cache/CacheConcurrentTest.java
index c7e3bf8bf..22445b28b 100644
--- a/hutool-cache/src/test/java/cn/hutool/cache/test/CacheConcurrentTest.java
+++ b/hutool-cache/src/test/java/cn/hutool/cache/CacheConcurrentTest.java
@@ -1,6 +1,5 @@
-package cn.hutool.cache.test;
+package cn.hutool.cache;
 
-import cn.hutool.cache.Cache;
 import cn.hutool.cache.impl.FIFOCache;
 import cn.hutool.cache.impl.LRUCache;
 import cn.hutool.cache.impl.WeakCache;
diff --git a/hutool-cache/src/test/java/cn/hutool/cache/test/CacheTest.java b/hutool-cache/src/test/java/cn/hutool/cache/CacheTest.java
similarity index 92%
rename from hutool-cache/src/test/java/cn/hutool/cache/test/CacheTest.java
rename to hutool-cache/src/test/java/cn/hutool/cache/CacheTest.java
index 1014ca524..1509cd56d 100644
--- a/hutool-cache/src/test/java/cn/hutool/cache/test/CacheTest.java
+++ b/hutool-cache/src/test/java/cn/hutool/cache/CacheTest.java
@@ -1,10 +1,9 @@
-package cn.hutool.cache.test;
+package cn.hutool.cache;
 
-import cn.hutool.cache.Cache;
-import cn.hutool.cache.CacheUtil;
 import cn.hutool.cache.impl.TimedCache;
 import cn.hutool.core.date.DateUnit;
 import cn.hutool.core.thread.ThreadUtil;
+import cn.hutool.core.util.RandomUtil;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -34,6 +33,15 @@ public class CacheTest {
 		Assert.assertNull(value1);
 	}
 
+	@Test
+	public void fifoCacheCapacityTest(){
+		Cache<String,String> fifoCache = CacheUtil.newFIFOCache(100);
+		for (int i = 0; i < RandomUtil.randomInt(100, 1000); i++) {
+			fifoCache.put("key" + i, "value" + i);
+		}
+		Assert.assertEquals(100, fifoCache.size());
+	}
+
 	@Test
 	public void lfuCacheTest(){
 		Cache<String, String> lfuCache = CacheUtil.newLFUCache(3);
diff --git a/hutool-cache/src/test/java/cn/hutool/cache/test/FileCacheTest.java b/hutool-cache/src/test/java/cn/hutool/cache/FileCacheTest.java
similarity index 91%
rename from hutool-cache/src/test/java/cn/hutool/cache/test/FileCacheTest.java
rename to hutool-cache/src/test/java/cn/hutool/cache/FileCacheTest.java
index 9010e52e4..eaadb83db 100644
--- a/hutool-cache/src/test/java/cn/hutool/cache/test/FileCacheTest.java
+++ b/hutool-cache/src/test/java/cn/hutool/cache/FileCacheTest.java
@@ -1,4 +1,4 @@
-package cn.hutool.cache.test;
+package cn.hutool.cache;
 
 import org.junit.Assert;
 import org.junit.Test;
diff --git a/hutool-extra/src/main/java/cn/hutool/extra/spring/SpringUtil.java b/hutool-extra/src/main/java/cn/hutool/extra/spring/SpringUtil.java
index ecb51dec2..0a0fdd097 100644
--- a/hutool-extra/src/main/java/cn/hutool/extra/spring/SpringUtil.java
+++ b/hutool-extra/src/main/java/cn/hutool/extra/spring/SpringUtil.java
@@ -3,6 +3,7 @@ package cn.hutool.extra.spring;
 import cn.hutool.core.lang.TypeReference;
 import cn.hutool.core.util.ArrayUtil;
 import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.ListableBeanFactory;
 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.context.ApplicationContext;
@@ -29,10 +30,13 @@ import java.util.Map;
 public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextAware {
 
 	/**
-	 * Spring应用上下文环境
+	 * "@PostConstruct"注解标记的类中，由于ApplicationContext还未加载，导致空指针<br>
+	 * 因此实现BeanFactoryPostProcessor注入ConfigurableListableBeanFactory实现bean的操作
 	 */
 	private static ConfigurableListableBeanFactory beanFactory;
-
+	/**
+	 * Spring应用上下文环境
+	 */
 	private static ApplicationContext applicationContext;
 
 	@Override
@@ -46,14 +50,24 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	}
 
 	/**
-	 * 获取applicationContext
+	 * 获取{@link ApplicationContext}
 	 *
-	 * @return ApplicationContext
+	 * @return {@link ApplicationContext}
 	 */
 	public static ApplicationContext getApplicationContext() {
 		return applicationContext;
 	}
 
+	/**
+	 * 获取{@link ListableBeanFactory}，可能为{@link ConfigurableListableBeanFactory} 或 {@link ApplicationContextAware}
+	 *
+	 * @return {@link ListableBeanFactory}
+	 * @since 5.7.0
+	 */
+	public static ListableBeanFactory getBeanFactory() {
+		return null == beanFactory ? applicationContext : beanFactory;
+	}
+
 	//通过name获取 Bean.
 
 	/**
@@ -65,7 +79,7 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 */
 	@SuppressWarnings("unchecked")
 	public static <T> T getBean(String name) {
-		return (T) beanFactory.getBean(name);
+		return (T) getBeanFactory().getBean(name);
 	}
 
 	/**
@@ -76,7 +90,7 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 * @return Bean对象
 	 */
 	public static <T> T getBean(Class<T> clazz) {
-		return beanFactory.getBean(clazz);
+		return getBeanFactory().getBean(clazz);
 	}
 
 	/**
@@ -88,7 +102,7 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 * @return Bean对象
 	 */
 	public static <T> T getBean(String name, Class<T> clazz) {
-		return beanFactory.getBean(name, clazz);
+		return getBeanFactory().getBean(name, clazz);
 	}
 
 	/**
@@ -104,7 +118,7 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 		final ParameterizedType parameterizedType = (ParameterizedType) reference.getType();
 		final Class<T> rawType = (Class<T>) parameterizedType.getRawType();
 		final Class<?>[] genericTypes = Arrays.stream(parameterizedType.getActualTypeArguments()).map(type -> (Class<?>) type).toArray(Class[]::new);
-		final String[] beanNames = beanFactory.getBeanNamesForType(ResolvableType.forClassWithGenerics(rawType, genericTypes));
+		final String[] beanNames = getBeanFactory().getBeanNamesForType(ResolvableType.forClassWithGenerics(rawType, genericTypes));
 		return getBean(beanNames[0], rawType);
 	}
 
@@ -117,7 +131,7 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 * @since 5.3.3
 	 */
 	public static <T> Map<String, T> getBeansOfType(Class<T> type) {
-		return beanFactory.getBeansOfType(type);
+		return getBeanFactory().getBeansOfType(type);
 	}
 
 	/**
@@ -128,7 +142,7 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 * @since 5.3.3
 	 */
 	public static String[] getBeanNamesForType(Class<?> type) {
-		return beanFactory.getBeanNamesForType(type);
+		return getBeanFactory().getBeanNamesForType(type);
 	}
 
 	/**
@@ -139,6 +153,9 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 * @since 5.3.3
 	 */
 	public static String getProperty(String key) {
+		if(null == applicationContext){
+			return null;
+		}
 		return applicationContext.getEnvironment().getProperty(key);
 	}
 
@@ -149,6 +166,9 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 * @since 5.3.3
 	 */
 	public static String[] getActiveProfiles() {
+		if(null == applicationContext){
+			return null;
+		}
 		return applicationContext.getEnvironment().getActiveProfiles();
 	}
 
@@ -175,7 +195,12 @@ public class SpringUtil implements BeanFactoryPostProcessor, ApplicationContextA
 	 * @since 5.4.2
 	 */
 	public static <T> void registerBean(String beanName, T bean) {
-		beanFactory.registerSingleton(beanName, bean);
+		if(null != beanFactory){
+			beanFactory.registerSingleton(beanName, bean);
+		} else if(applicationContext instanceof ConfigurableApplicationContext){
+			ConfigurableApplicationContext context = (ConfigurableApplicationContext) applicationContext;
+			context.getBeanFactory().registerSingleton(beanName, bean);
+		}
 	}
 }
 
diff --git a/hutool-jwt/pom.xml b/hutool-jwt/pom.xml
index 7f3ccdd05..0d6e1b90c 100644
--- a/hutool-jwt/pom.xml
+++ b/hutool-jwt/pom.xml
@@ -12,7 +12,7 @@
 
 	<artifactId>hutool-jwt</artifactId>
 	<name>${project.artifactId}</name>
-	<description>Hutool JWT生成、解析和验证实现</description>
+	<description>JWT生成、解析和验证实现</description>
 
 	<properties>
 		<!-- versions -->
@@ -30,6 +30,7 @@
 			<artifactId>hutool-crypto</artifactId>
 			<version>${project.parent.version}</version>
 		</dependency>
+		<!-- 测试特殊算法 -->
 		<dependency>
 			<groupId>org.bouncycastle</groupId>
 			<artifactId>bcprov-jdk15to18</artifactId>
diff --git a/hutool-jwt/src/test/java/cn/hutool/jwt/JWTSignerTest.java b/hutool-jwt/src/test/java/cn/hutool/jwt/JWTSignerTest.java
index e391a4e00..21205a9bf 100644
--- a/hutool-jwt/src/test/java/cn/hutool/jwt/JWTSignerTest.java
+++ b/hutool-jwt/src/test/java/cn/hutool/jwt/JWTSignerTest.java
@@ -116,6 +116,6 @@ public class JWTSignerTest {
 				.setSigner(signer);
 
 		String token = jwt.sign();
-		Assert.assertTrue(JWT.of(token).setSigner(signer).verify());
+		Assert.assertTrue(JWT.of(token).verify(signer));
 	}
 }