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Spring boot 实现单个或批量文件上传功能

转载 作者:qq735679552 更新时间:2022-09-28 22:32:09 28 4
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一:添加依赖:

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<!-- thymeleaf模板插件 -->
   <dependency>
     <groupid>org.springframework.boot</groupid>
     <artifactid>spring-boot-starter-thymeleaf</artifactid>
   </dependency>
    <!-- jsp依赖 -->
<dependency>
   <groupid>javax.servlet</groupid>
   <artifactid>jstl</artifactid>
</dependency>
<dependency>
   <groupid>org.apache.tomcat.embed</groupid>
   <artifactid>tomcat-embed-jasper</artifactid>
   <!--<scope>provided</scope>-->
</dependency>

二:application.xml配置文件路径:

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#配置上传文件地址
image.location.path=f:/image/
#配置文件大小限制
spring.http.multipart.maxfilesize=100mb
spring.http.multipart.maxrequestsize=100mb
#静态页面的访问配置
spring.thymeleaf.cache= false
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.check-template-location= true
spring.thymeleaf.suffix=.html
spring.thymeleaf.encoding=utf- 8
spring.thymeleaf.content-type=text/html
spring.thymeleaf.mode=html5

三:编写静态页面(src/main/resources下建文件夹static(static存放静态文件,比如 css、js、image…)和templates(存放静态页面)两个是同级目录),先在templates 中新建一个 uploadimg.html.

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<!doctype html>
<html>
  <head>
   <title>uploadimg.html</title>
   <meta name= "keywords" content= "keyword1,keyword2,keyword3" ></meta>
   <meta name= "description" content= "this is my page" ></meta>
   <meta name= "content-type" content= "text/html; charset=utf-8" ></meta>
   <!--<link rel= "stylesheet" type= "text/css" href= "./styles.css" rel= "external nofollow" >-->
  </head>
  <body>
  <form enctype= "multipart/form-data" method= "post" action= "/dc/fileupload" >
   图片<input type= "file" name= "file" />
   <input type= "submit" value= "上传" />
   </form>
  </body>
</html>

四:编写controller层:

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package com.hot.analysis.controller.file;
import java.io.bufferedinputstream;
import java.io.file;
import java.io.fileinputstream;
import java.io.ioexception;
import java.io.outputstream;
import java.util.date;
import java.util.random;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import org.springframework.beans.factory.annotation.value;
import org.springframework.web.bind.annotation.postmapping;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.responsebody;
import org.springframework.web.bind.annotation.restcontroller;
import org.springframework.web.multipart.multipartfile;
import org.springframework.web.servlet.modelandview;
import com.hot.analysis.exception.myexception;
@restcontroller
public class fileuploadcontroller {
  //获取配置文件的路径
  @value ( "${image.location.path}" )
  private string resourcedir;
  /**
    * 实现文件上传
    * */
  @requestmapping (value = "/index" )
  public modelandview toindex() {
  modelandview mv = new modelandview( "uploadimg" );
  return mv;
  }
   //单个文件上传
   @requestmapping ( "/dc/fileupload" )
   @responsebody
   public string fileupload( multipartfile file){
    // 获取上传文件路径
     string uploadpath = file.getoriginalfilename();
     // 获取上传文件的后缀
     string filesuffix = uploadpath.substring(uploadpath.lastindexof( "." ) + 1 , uploadpath.length());
     if (filesuffix.equals( "apk" )) {
     uploadpath = resourcedir;
     } else {
     // 上传目录地址
     // string uploadpath="e:/hot-manage/image/";//windows路径
     uploadpath =resourcedir; // liux路劲
     }
     // 上传文件名
     string filename = new date().gettime() + new random().nextint( 100 ) + "." + filesuffix;
     file savefile = new file(uploadpath + filename);
     if (!savefile.getparentfile().exists()) {
     savefile.getparentfile().mkdirs();
     }
     try {
     file.transferto(savefile);
     } catch (illegalstateexception e) {
     e.printstacktrace();
     } catch (ioexception e) {
     e.printstacktrace();
     }
     if (filesuffix.equals( "apk" )) {
     return "/apk/" + filename;
     } else {
     return "/image/" + filename;
     }
    }
  // 批量上传
   @postmapping ( "/dc/morefileupload" )
  public string bacthfileupload(multipartfile[] file) throws myexception {
   stringbuffer buffer = new stringbuffer();
   for (multipartfile multipartfile : file) {
   string str = fileupload(multipartfile);
   buffer.append(str);
   buffer.append( "," );
   }
   string all = buffer.substring( 0 , buffer.length() - 1 );
   return all;
  }
  // 删除文件
   @postmapping ( "/dc/deletefile" )
   public string delfile(string path) {
    string resultinfo = null ;
  int lastindexof = path.lastindexof( "/" );
  string sb = path.substring(lastindexof + 1 , path.length());
  sb = "f:/image/" + sb;
  file file = new file(sb);
  if (file.exists()) {
   if (file.delete()) {
   resultinfo = "1-删除成功" ;
   } else {
   resultinfo = "0-删除失败" ;
   }
  } else {
   resultinfo = "文件不存在!" ;
  }
  return resultinfo;
  }
  //文件下载相关代码
   @requestmapping ( "/download" )
   public string downloadfile(httpservletrequest request, httpservletresponse response) {
     string filename = "aim_test.txt" ; // 设置文件名,根据业务需要替换成要下载的文件名
     if (filename != null ) {
       //设置文件路径
       string realpath = "d://aim//" ;
       file file = new file(realpath , filename);
       if (file.exists()) {
         response.setcontenttype( "application/force-download" ); // 设置强制下载不打开
         response.addheader( "content-disposition" , "attachment;filename=" + filename); // 设置文件名
         byte [] buffer = new byte [ 1024 ];
         fileinputstream fis = null ;
         bufferedinputstream bis = null ;
         try {
           fis = new fileinputstream(file);
           bis = new bufferedinputstream(fis);
           outputstream os = response.getoutputstream();
           int i = bis.read(buffer);
           while (i != - 1 ) {
             os.write(buffer, 0 , i);
             i = bis.read(buffer);
           }
           system.out.println( "success" );
         } catch (exception e) {
           e.printstacktrace();
         } finally {
           if (bis != null ) {
             try {
               bis.close();
             } catch (ioexception e) {
               e.printstacktrace();
             }
           }
           if (fis != null ) {
             try {
               fis.close();
             } catch (ioexception e) {
               e.printstacktrace();
             }
           }
         }
       }
     }
     return null ;
   }
 
   }

测试:

Spring boot 实现单个或批量文件上传功能

成功返回路径:

Spring boot 实现单个或批量文件上传功能

查看文件夹:

Spring boot 实现单个或批量文件上传功能

总结 。

以上所述是小编给大家介绍的spring boot 实现单个或批量文件上传功能,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对我网站的支持! 。

原文链接:https://blog.csdn.net/qq_33355858/article/details/81747101 。

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