Spring boot 实现单个或批量文件上传功能
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2024-02-25 09:18:58
一：添加依赖：
or...
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