将图片资源保存到服务器的盘符中

服务类

• 系统盘符：file-path.disk（可能会变，配置配置文件dev中）
• 文件根路径：file-path.root-path（可能会变，配置配置文件dev中）
• http协议的Nginx的映射前缀：PrefixConstant.HTTP_PREFIX

package com.sky.service;import com.sky.constant.MessageConstant;
import com.sky.constant.PrefixConstant;
import com.sky.exception.BaseException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;import java.io.File;
import java.io.IOException;@Service
public class CommonService {@Value("${file-path.disk}")private String disk;@Value("${file-path.root-path}")private String rootPath;/*** 文件上传** @param parentPath 父路径* @param file       文件*/public String upload(String parentPath, MultipartFile file) {// Upload fileString fileName = file.getOriginalFilename();// Get full path using system file separatorString fullPath = disk + ":" + File.separator + rootPath + File.separator + parentPath;// Create the directory if it doesn't existFile directory = new File(fullPath);if (!directory.exists()) {directory.mkdirs();}// Create the destination fileFile dest = new File(directory, fileName);try {file.transferTo(dest);} catch (IOException e) {throw new BaseException(MessageConstant.UPLOAD_FAILED);}// Return the file access URLreturn PrefixConstant.HTTP_PREFIX +fileName;}
}

配置文件

总配置文件

sky:jwt:# 设置jwt签名加密时使用的秘钥admin-secret-key: itcast# 设置jwt过期时间admin-ttl: 720000000# 设置前端传递过来的令牌名称admin-token-name: tokenfile-path:disk: ${file-path.disk}root-path: ${file-path.root-path}

开发环境配置文件

file-path:disk: Droot-path: sky_take_out

常量类

文件路径常量

package com.sky.constant;public class SystemPathConstant {public static final String COMMON = "common";// 构造函数私有化private SystemPathConstant() {}
}

nginx路径映射常量

package com.sky.constant;public class PrefixConstant {public static final String HTTP_PREFIX = "http://localhost/files/";// 构造函数私有化private PrefixConstant() {}
}

controller层

别人上传完图片之后把访问路径给别人（http的路径，不是本地路径）

    @PostMapping("/upload")@ApiOperation("文件上传")public Result<String> upload(MultipartFile file) {log.info("文件上传：{}", file);// 将文件上传到本地文件夹下// 返回文件的访问路径String filePath = commonService.upload(SystemPathConstant.COMMON,file);return Result.success(filePath);}

配置类放行静态资源

package com.sky.config;import com.sky.constant.SystemPathConstant;
import com.sky.interceptor.JwtTokenAdminInterceptor;
import com.sky.json.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;import java.util.List;/*** 配置类，注册web层相关组件*/
@Configuration
@Slf4j
public class WebMvcConfiguration extends WebMvcConfigurationSupport {@Autowiredprivate JwtTokenAdminInterceptor jwtTokenAdminInterceptor;@Value("${file-path.disk}")private String disk;@Value("${file-path.root-path}")private String rootPath;..... 其他配置一万行/*** 设置静态资源映射* @param registry*/protected void addResourceHandlers(ResourceHandlerRegistry registry) {registry.addResourceHandler("/doc.html").addResourceLocations("classpath:/META-INF/resources/");registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");// Map the file directory to a URL pathregistry.addResourceHandler("/files/**").addResourceLocations("file:" +disk + ":" + "/" +rootPath + "/" +SystemPathConstant.COMMON + "/");}}

nginx映射

静态资源到本地盘符（这就你的代码中配置的判读）

• 这个文件是开发环境的，正式环境按照正式环境的路径和盘符配置
  改完记得重启一下

       location /files/ {alias D:/sky_take_out/common/;}

• 有的时候会访问403 异常
• 文件权限异常
• 访问一定要访问具体文件，不要访问到文件夹