添加 SpringUtil

4dkankan-common-utils/src/main/java/com/fdkankan/common/util/SpringUtil.java

@@ -0,0 +1,65 @@
+package com.fdkankan.common.util;
+
+import org.springframework.beans.BeansException;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.stereotype.Component;
+
+import java.util.Map;
+
+/**
+ * 实现ApplicationContextAware接口，并加入Component注解，让spring扫描到该bean
+ * 该类用于在普通Java类中注入bean,普通Java类中用@Autowired是无法注入bean的
+ */
+@Component
+public class SpringUtil implements ApplicationContextAware {
+    private static ApplicationContext applicationContext;
+
+    @Override
+    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
+        if(SpringUtil.applicationContext == null) {
+            SpringUtil.applicationContext = applicationContext;
+        }
+    }
+
+    /**
+     * 获取applicationContext
+     */
+    public static ApplicationContext getApplicationContext() {
+        return applicationContext;
+    }
+
+    /**
+     *通过name获取 Bean.
+     * @param name
+     * @return
+     */
+    public static Object getBean(String name){
+        return getApplicationContext().getBean(name);
+    }
+
+    /**
+     * 通过class获取Bean.
+     * @param clazz
+     * @param <T>
+     * @return
+     */
+    public static <T> T getBean(Class<T> clazz){
+        return getApplicationContext().getBean(clazz);
+    }
+
+    /**
+     * 通过name,以及Clazz返回指定的Bean
+     * @param name
+     * @param clazz
+     * @param <T>
+     * @return
+     */
+    public static <T> T getBean(String name,Class<T> clazz){
+        return getApplicationContext().getBean(name, clazz);
+    }
+
+    public <T> Map<String, T> getBeansOfType(Class<T> clazz) {
+        return applicationContext.getBeansOfType(clazz);
+    }
+}