java基于spring boot本地上传图片示例解析

 <?xml version="1.0" encoding="UTF-8"?>
  <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.1.3.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.com.sctic</groupId>
    <artifactId>upload</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>upload</name>
    <description>Demo project for Spring Boot</description>
  
    <properties>
      <java.version>1.8</java.version>
    </properties>
  
    <dependencies>
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
      </dependency>
  
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
  
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
      </dependency>
      
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
      </dependency>
      
    </dependencies>
    <build>
      <plugins>
        <plugin>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
      </plugins>
    </build>
  </project>

 @Controller
  public class UploadController {
    private Logger logger = LoggerFactory.getLogger(this.getClass());
  
    @Value("${scitc.upload.src}")
    private String rootPath;
  
    @Value("${scitc.upload.host}")
    private String uploadhost;
  
    @RequestMapping(value = "/uploadFile",method = {RequestMethod.POST,RequestMethod.GET})
    @ResponseBody
    public String uploadFile(MultipartFile file) {
  
      //文件的完整名称,如spring.jpeg
      String filename = file.getOriginalFilename();
      //文件名,如spring
      String name = filename.substring(0,filename.indexOf("."));
      //文件后缀,如.jpeg
      String suffix = filename.substring(filename.lastIndexOf("."));
  
      //创建年月文件夹
      Calendar date = Calendar.getInstance();
      File dateDirs = new File(date.get(Calendar.YEAR)
          + File.separator + (date.get(Calendar.MONTH)+1));
  
      //目标文件
      File descFile = new File(rootPath+File.separator+dateDirs+File.separator+filename);
      int i = 1;
      //若文件存在重命名
      String newFilename = filename;
      while(descFile.exists()) {
        newFilename = name+"("+i+")"+suffix;
        String parentPath = descFile.getParent();
        descFile = new File(parentPath+File.separator+newFilename);
        i++;
      }
      //判断目标文件所在的目录是否存在
      if(!descFile.getParentFile().exists()) {
        //如果目标文件所在的目录不存在，则创建父目录
        descFile.getParentFile().mkdirs();
      }
      //将内存中的数据写入磁盘
      try {
        file.transferTo(descFile);
      } catch (Exception e) {
        e.printStackTrace();
        logger.error("上传失败，cause:{}",e);
      }
      //完整的url
      String fileUrl = uploadhost + rootPath +dateDirs+ "/"+newFilename;
      return "success:" + fileUrl;
    }
  }

 @Configuration
  public class WebMvcConfigurer extends WebMvcConfigurationSupport {
    @Value("${scitc.upload.src}")
    private String src;
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
      registry.addResourceHandler(src + "/**").addResourceLocations("file:" + src);
    }
  }

 server.port=8848 
	  ##文件上传config
	  scitc.upload.host:127.0.0.1:${server.port}
	  scitc.upload.src=/Users/jswzj/Desktop/uploads/
	  spring.servlet.multipart.maxFileSize=10MB
	  spring.servlet.multipart.maxRequestSize=10MB

	   server.port=8848 服务器的端口号
	   scitc.upload.host:服务器ip地址 + server.port
	   scitc.upload.src:你要把用户上传的图片上传到那个位置**