Springboot 配置 上传服务器资源路径映射到本地路径，使图片能使用url地址进行回显

 文件上传下载是web开发常见项目，本地开发时一般都使用本地存储进行测试，但是图片上传时往往需要回显，这就需要url地址否则不能正常回显，所以需要地址进行映射

第一种方式：（添加配置类）

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 UploadFilePathConfig implements WebMvcConfigurer {
    private static String UPLOAD_PATH = "xxx";
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //  /gbx/file/**为前端URL访问路径  后面 file:xxxx为本地磁盘映射
        registry.addResourceHandler("/gbx/file/**").addResourceLocations("file:C:" + UPLOAD_PATH);
    }
}

第二种方式：（使用nginx）

 完整nginx.conf配置：

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;
	
	client_max_body_size 1024m;

    #gzip  on;

    server {
	
        #charset koi8-r;

        #access_log  logs/host.access.log  main;
		
        listen       9231;
        server_name  136.31.17.251;
		
        location / {

            root   D:/testRoadFile;
            index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

如上所示，在保存了nginx.conf配置并重启nginx后，只需要访问 http://136.31.17.251:9231/xxx 就可以访问对应本地目录下的xxx了。

PS：温馨提示，上传时注意nginx和springboot都有文件大小限制，自己重新配置下！