Update ConfigurerAdapter.java

src/main/java/com/zsz/config/ConfigurerAdapter.java

@@ -1,18 +1,3 @@
-/*
- *  Copyright 2019-2020 Zheng Jie
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
 package com.zsz.config;
 
 import org.springframework.context.annotation.Configuration;
@@ -21,26 +6,35 @@ import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 import javax.annotation.Resource;
 
-
 /**
- * WebMvcConfigurer
+ * WebMvc配置类
+ * 功能：自定义Spring MVC配置，主要用于静态资源映射
  * 
- * @author Zheng Jie
- * @date 2018-11-30
+ * @author 郑杰
+ * @date 2018-11-30 创建日期
  */
-@Configuration
-//@EnableWebMvc
+@Configuration  // 标识这是一个Spring配置类
+//@EnableWebMvc  // 如需完全接管MVC配置可取消注释（当前被注释表示保留Spring Boot自动配置）
 public class ConfigurerAdapter implements WebMvcConfigurer {
 
-    @Resource
+    @Resource  // 自动注入系统工具类（按名称装配）
     private SystemUtil systemUtil;
 
+    // 文件存储路径前缀常量
     public static final String PATH_PREFIX = "upload/";
 
+    /**
+     * 配置静态资源映射
+     * 作用：将物理磁盘中的上传文件目录映射为虚拟URL路径
+     * 
+     * @param registry 资源处理器注册器
+     */
     @Override
     public void addResourceHandlers(ResourceHandlerRegistry registry) {
-        registry.addResourceHandler("/" + PATH_PREFIX + "**").addResourceLocations("file:" + systemUtil.getFilePrefix());
-
+        // 添加资源处理规则：
+        // 1. 当访问URL以"/upload/"开头时
+        // 2. 将请求映射到systemUtil.getFilePrefix()返回的本地文件系统路径
+        registry.addResourceHandler("/" + PATH_PREFIX + "**")
+               .addResourceLocations("file:" + systemUtil.getFilePrefix());
     }
-
 }