springBoot文件上传与下载整合

Spring Boot 文件上传及下载方案

1.controller文件上传部分

注意&＃xff1a;其中AjaxResult为返回封装类&＃xff0c;这个类可有可无&＃xff0c;开发环境下为了统一返回格式用

&＃064;PostMapping("/upload")
public AjaxResult uploadFile(MultipartFile file) throws Exception {
try {
// 上传文件路径(这里最好配置在yml中&＃xff0c;以方便后续修改 若为linux 可以直接写:"/home/upload/" ,具体地址&＃xff0c;大家自己定就可以)
String filePath &＃061; "D:/base/uploadPath"
//获取上传的文件名称
String fileName &＃061; file.getOriginalFilename();
//构造路径&＃xff0c;返回file对象
File desc &＃061; new File(filePath &＃043; File.separator &＃043; fileName);
if (!desc.getParentFile().exists()) {
desc.getParentFile().mkdirs();
}
//进行上传
file.transferTo(desc);
AjaxResult ajax &＃061; AjaxResult.success();
//这里是将file的名称和路径返回到请求调用处
ajax.put("fileName", fileName);
return ajax;
} catch (Exception e) {
return AjaxResult.error(e.getMessage());
}
}


2.controller文件下载部分

/**
* 本地资源通用下载
*/
&＃064;GetMapping("/download")
public void resourceDownload(&＃064;ApiParam(name &＃061; "name", value &＃061; "文件名称", required &＃061; true, type &＃061; "String")String name, HttpServletRequest request, HttpServletResponse response) throws Exception {
// 本地资源路径
String localPath &＃061; "D:/base/uploadPath"
// 数据库资源地址
String downloadPath &＃061; localPath &＃043;"/" &＃043;name;
// 下载名称,这里浏览器不同&＃xff0c;需要做的处理也不同&＃xff1b;
String encodeName &＃061; URLEncoder.encode(name, "utf-8");
File file &＃061; new File(downloadPath);
if (file.exists()) {
response.setCharacterEncoding("utf-8");
response.setContentType("application/force-download");
response.addHeader("Content-Disposition", "attachment;fileName&＃061;" &＃043; encodeName);
byte[] buffer &＃061; new byte[1024];
FileInputStream fis &＃061; null;
BufferedInputStream bis &＃061; null;
try {
fis &＃061; new FileInputStream(file);
bis &＃061; new BufferedInputStream(fis);
OutputStream outputStream &＃061; response.getOutputStream();
int i &＃061; bis.read(buffer);
while (i !&＃061; -1) {
outputStream.write(buffer, 0, i);
i &＃061; bis.read(buffer);
}
}catch (Exception e){
e.printStackTrace();
}
}
}


关于根据浏览器设置返回名称的方法

public static String setFileDownloadHeader(HttpServletRequest request, String fileName)
throws UnsupportedEncodingException
{
final String agent &＃061; request.getHeader("USER-AGENT");
String filename &＃061; fileName;
if (agent.contains("MSIE"))
{
// IE浏览器
filename &＃061; URLEncoder.encode(filename, "utf-8");
filename &＃061; filename.replace("&＃043;", " ");
}
else if (agent.contains("Firefox"))
{
filename &＃061; new String(fileName.getBytes(), "ISO8859-1");
}
else if (agent.contains("Chrome"))
{
// google浏览器
filename &＃061; URLEncoder.encode(filename, "utf-8");
}
else
{
// 其它浏览器
filename &＃061; URLEncoder.encode(filename, "utf-8");
}
return filename;
}


关于对上传文件的直接url访问&＃xff0c;需要映射目录路径&＃xff0c;以D:/base/uploadPath 为例,

/**
* 资源映射路径
*/
&＃064;Configuration
public class MyWebAppConfigurer implements WebMvcConfigurer {
&＃064;Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/temp-rainy/**").addResourceLocations("file:D:/base/uploadPath/");
}
}


本文地址：https://blog.csdn.net/qq_33304139/article/details/110441887