Add SOSContextHolder

src/main/java/com/monkeyk/sos/config/WebSecurityConfigurer.java

@@ -1,6 +1,7 @@
 package com.monkeyk.sos.config;
 
 import com.monkeyk.sos.service.UserService;
+import com.monkeyk.sos.web.context.SOSContextHolder;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -97,4 +98,14 @@ public class WebSecurityConfigurer extends WebSecurityConfigurerAdapter {
     }
 
 
+    /**
+     * SOSContextHolder bean
+     *
+     * @return SOSContextHolder bean
+     * @since 2.0.1
+     */
+    @Bean
+    public SOSContextHolder sosContextHolder() {
+        return new SOSContextHolder();
+    }
 }

src/main/java/com/monkeyk/sos/web/context/SOSContextHolder.java

@@ -0,0 +1,82 @@
+package com.monkeyk.sos.web.context;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.util.Assert;
+
+/**
+ * 2019/7/6
+ * <p>
+ * <p>
+ * Spring ApplicationContext Holder,
+ * get Spring bean from ApplicationContext
+ *
+ * @author Shengzhao Li
+ * @since 2.0.1
+ */
+public class SOSContextHolder implements ApplicationContextAware, InitializingBean {
+
+
+    private static ApplicationContext applicationContext;
+
+
+    public SOSContextHolder() {
+    }
+
+    @Override
+    public void setApplicationContext(ApplicationContext context) throws BeansException {
+        SOSContextHolder.applicationContext = context;
+    }
+
+
+    /**
+     * Retrieves the {@code ApplicationContext} set when Spring created and initialized the holder bean. If the
+     * holder has not been created (see the class documentation for details on how to wire up the holder), or if
+     * the holder has not been initialized, this accessor may return {@code null}.
+     * <p/>
+     *
+     * @return the set context, or {@code null} if the holder bean has not been initialized
+     */
+    public static ApplicationContext getApplicationContext() {
+        return applicationContext;
+    }
+
+
+    /**
+     * Get Spring Bean by clazz.
+     *
+     * @param clazz Class
+     * @param <T>   class type
+     * @return Bean instance
+     */
+    public static <T> T getBean(Class<T> clazz) {
+        if (applicationContext == null) {
+            throw new IllegalStateException("applicationContext is null");
+        }
+        return applicationContext.getBean(clazz);
+    }
+
+
+    /**
+     * Get Spring Bean by beanId.
+     *
+     * @param beanId beanId
+     * @param <T>    class type
+     * @return Bean instance
+     */
+    @SuppressWarnings("unchecked")
+    public static <T> T getBean(String beanId) {
+        if (applicationContext == null) {
+            throw new IllegalStateException("applicationContext is null");
+        }
+        return (T) applicationContext.getBean(beanId);
+    }
+
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        Assert.notNull(applicationContext, "applicationContext is null");
+    }
+}