springboot+editor实现图片上传

其中
private static final String UPLOADED_FOLDER = "/usr/img/blog/";
Controller层方法

 @RequestMapping(value="/uploadfile",method=RequestMethod.POST)
    public void hello(HttpServletRequest request,HttpServletResponse response,@RequestParam(value = "editormd-image-file", required = false) MultipartFile attach){
        try {
            request.setCharacterEncoding( "utf-8" );
            response.setHeader( "Content-Type" , "text/html" );
            String rootPath = request.getSession().getServletContext().getRealPath("/img/blog/");
            String physicPath=UPLOADED_FOLDER;

            /**
             * 文件路径不存在则需要创建文件路径
             */
            File filePath=new File(rootPath);
            File filePath2=new File(physicPath);
            if(!filePath2.exists()){
                filePath2.mkdirs();
            }
            if(!filePath.exists()){
                filePath.mkdirs();
            }

            //最终文件名
            File realFile=new File(rootPath+File.separator+attach.getOriginalFilename());
            File realFile2=new File(physicPath+File.separator+attach.getOriginalFilename());
            FileUtils.copyInputStreamToFile(attach.getInputStream(), realFile);
            FileUtils.copyInputStreamToFile(attach.getInputStream(), realFile2);

            //下面response返回的json格式是editor.md所限制的，规范输出就OK
            response.getWriter().write( "{\"success\": 1, \"message\":\"上传成功\",\"url\":\"/img/blog/" + attach.getOriginalFilename() + "\"}" );
        } catch (Exception e) {
            try {
                response.getWriter().write( "{\"success\":0}" );
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }

然后config里配置一下路径转换

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;


@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

   @Override
   public void addResourceHandlers(ResourceHandlerRegistry registry) {
       registry.addResourceHandler("/img/blog/**").addResourceLocations("file:/usr/img/blog/");       
   }

}

本身不配置地址转换，图片上传是保存在tomcat临时文件夹里面的，当服务器重启，就无法访问以前上传的图片了。所以这里来把图片保存至本地，做一个虚拟地址映射。


这里图片映射的地址就是虚拟的tomcat服务器的地址，但是我们配置了地址映射，这样服务器在找/img/blog/下的文件就会去我们配置的物理地址上去找了。