新增是否启用默认 Servlet 映射（启用后可访问 webapp 下的静态资源）

modules/core/src/main/java/com/jeesite/modules/config/web/DefaultServletConfig.java

@@ -0,0 +1,26 @@
+/**
+ * Copyright (c) 2013-Now http://jeesite.com All rights reserved.
+ * No deletion without permission, or be held responsible to law.
+ */
+package com.jeesite.modules.config.web;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+/**
+ * 是否启用默认 Servlet 映射（启用后可访问 webapp 下的静态资源）
+ * @author ThinkGem
+ * @version 2022年4月18日
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnProperty(name="server.servlet.register-default-servlet", havingValue="true", matchIfMissing=false)
+public class DefaultServletConfig implements WebMvcConfigurer {
+
+	@Override
+	public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
+		configurer.enable();
+	}
+
+}