SpringBoot配置图片访问的虚拟路径

  <div class="layui-form-item">
        <label class="layui-form-label">简介图片</label>
        <div class="layui-upload layui-input-block">
            <button type="button" class="layui-btn" id="SingleUpload">
                <i class="layui-icon layui-icon-upload"></i> 上传图片
            </button>
            <img id="simpleImg" width="60px" height="60px">
        </div>
    </div>

 upload.render({  //这里是上传一张图片
        elem: "#SingleUpload",
        url: ctx + "/book/SingleUpload",
        done: function (res, index, upload) {
            //假设code=0代表上传成功
            if (res.code == 0) {
                layer.msg("简介图片加载成功！", {icon: 1});
                $("#simpleImg").attr("src", res.image);
                $("#SingleUpload").addClass("layui-btn-disabled");
                $("#SingleUpload").off("click");
            }
        }
    });

  private String simplePath = "D:/uploadLibrary/";
    // 详细图片地址
    private StringBuilder detailsPath = new StringBuilder();

 @RequestMapping("/SingleUpload")
    @ResponseBody
    public Map<String, Object> SingleUpload(@RequestParam("file") MultipartFile file, HttpServletRequest req,
                                            HttpSession session) {
        Map<String, Object> map = new HashMap<String, Object>();
        try {
            String suffixName = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
            String filename = UUID.randomUUID() + suffixName;
            File filePath = new File(dirPath);
            if (!filePath.exists()) {
                filePath.mkdirs();
            }
            //创建虚拟路径存储
            simplePath = req.getServletContext().getContextPath() + "/file/" + filename;
            // simplePath = filename;
            map.put("image", simplePath);
            file.transferTo(new File(dirPath + filename));
            map.put("code", 0);
            map.put("msg", "上传成功");
        } catch (Exception e) {
            map.put("code", 1);
            map.put("msg", "上传失败");
            e.printStackTrace();
        }
        return map;
    }

package com.book.libratyman.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/file/**").addResourceLocations("file:D:/uploadLibrary/");
    }
}