feat: auto init device

src/main/java/cn/edu/cqwu/repair/dao/impl/DeviceDaoImpl.java

@@ -16,13 +16,8 @@ import java.util.ArrayList;
 public class DeviceDaoImpl implements DeviceDao {
     private static final DeviceMapper mapper = ConnectionFactory.getMapper(DeviceMapper.class);
 
-
     @Override
     public ArrayList<Device> findAllDevice() {
-
-
         return (ArrayList<Device>) mapper.selectAll();
     }
-
-
 }

src/main/java/cn/edu/cqwu/repair/listener/MyServletContextListener.java

@@ -0,0 +1,34 @@
+package cn.edu.cqwu.repair.listener;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
+import javax.servlet.annotation.WebListener;
+
+import cn.edu.cqwu.repair.dao.DeviceDao;
+import cn.edu.cqwu.repair.util.AppInit;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.context.support.WebApplicationContextUtils;
+
+
+/**
+ * @author xtaod
+ */
+@WebListener
+public class MyServletContextListener extends AppInit implements ServletContextListener {
+
+    @Override
+    public void contextInitialized(ServletContextEvent sce) {
+        ServletContext application = sce.getServletContext();
+        WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(application);
+        if (context != null) {
+            DeviceDao deviceDao = context.getBean(DeviceDao.class);
+            initDevice(application, deviceDao);
+        }
+    }
+
+    @Override
+    public void contextDestroyed(ServletContextEvent sce) {
+
+    }
+}

src/main/java/cn/edu/cqwu/repair/util/AppInit.java

@@ -0,0 +1,14 @@
+package cn.edu.cqwu.repair.util;
+
+import cn.edu.cqwu.repair.dao.DeviceDao;
+
+import javax.servlet.ServletContext;
+
+/**
+ * @author xtaod
+ */
+public class AppInit {
+    public static void initDevice(ServletContext servletContext, DeviceDao deviceDao) {
+        servletContext.setAttribute("device", deviceDao.findAllDevice());
+    }
+}