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Spring boot 实现单个或批量文件上传功能

2019年07月19日  | 移动技术网IT编程  | 我要评论

一：添加依赖：

<!-- 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：

#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。

<!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：

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：

成功返回路径：

查看文件夹：

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

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