add SpringUtil

hutool-extra/src/main/java/cn/hutool/extra/spring/SpringUtil.java

@@ -0,0 +1,78 @@
+package cn.hutool.extra.spring;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.stereotype.Component;
+
+/**
+ * Spring(Spring boot)工具封装，包括：
+ *
+ * <pre>
+ *     1、Spring IOC容器中的bean对象获取
+ * </pre>
+ *
+ * @author loolly
+ * @since 5.1.0
+ */
+@Component
+public class SpringUtil implements ApplicationContextAware {
+
+	private static ApplicationContext applicationContext;
+
+	@SuppressWarnings("NullableProblems")
+	@Override
+	public void setApplicationContext(ApplicationContext applicationContext) {
+		if (SpringUtil.applicationContext == null) {
+			SpringUtil.applicationContext = applicationContext;
+		}
+	}
+
+	/**
+	 * 获取applicationContext
+	 *
+	 * @return ApplicationContext
+	 */
+	public static ApplicationContext getApplicationContext() {
+		return applicationContext;
+	}
+
+	//通过name获取 Bean.
+
+	/**
+	 * 通过name获取 Bean
+	 * @param name Bean名称
+	 * @return Bean
+	 */
+	public static <T> T getBean(String name) {
+		//noinspection unchecked
+		return (T) applicationContext.getBean(name);
+	}
+
+	/**
+	 * 通过class获取Bean
+	 *
+	 * @param <T> Bean类型
+	 * @param clazz Bean类
+	 * @return Bean对象
+	 */
+	public static <T> T getBean(Class<T> clazz) {
+		return applicationContext.getBean(clazz);
+	}
+
+	/**
+	 * 通过name,以及Clazz返回指定的Bean
+	 *
+	 * @param <T> bean类型
+	 * @param name Bean名称
+	 * @param clazz bean类型
+	 * @return Bean对象
+	 */
+	public static <T> T getBean(String name, Class<T> clazz) {
+		return applicationContext.getBean(name, clazz);
+	}
+
+}
+
+
+
+