SpringBootファイルのアップロードとダウンロードを実現
27767 ワード
1.ファイルのダウンロード
ファイルC:/Users/admin/desktop/testを用意します.xlsx
2.単一ファイルアップロード
uploadを用意します.html
ここのname=「file」に注意
3.マルチファイルアップロード
JAvaコード
ファイルC:/Users/admin/desktop/testを用意します.xlsx
/**
*
* @param response
* @return
*/
@RequestMapping("/downLoadTemplateExcel")
public Info downLoadTemplateExcel(HttpServletResponse response){
logger.info("/customAnalysisConfig/downLoadTemplateExcel");
Info infos=new Info();
//
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
//String url = "C:/Users/admin/Desktop/test.xlsx";
String url =null;
if(environment.equals("local")){//
url ="C:/Users/admin/Desktop/test.xlsx";
}else {//
url = "/usr/java/test.xlsx";
}
String downLoadPath = url;
String fileName="template.xlsx";//
File file2 = new File(downLoadPath);//
if (!file2.exists()) {// ,
file2.mkdirs();
}
long fileLength = file2.length();//
try {
//Content-Disposition: attachment; filename="filename.xls"
// attachment（ ； “ ” ，
// filename ， ）
response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("utf-8"), "ISO8859-1"));
//Content-Type MIME media type
response.setHeader("Content-Type", "application/json");
//Content-Length, HTTP ,
response.setHeader("Content-Length", String.valueOf(fileLength));
//
bis = new BufferedInputStream(new FileInputStream(downLoadPath));
bos = new BufferedOutputStream(response.getOutputStream());
//
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
}catch (Exception e){
e.printStackTrace();
}finally {
if (bis != null)
try {
bis.close();//
} catch (IOException e) {
e.printStackTrace();
}
if (bos != null)
try {
bos.close();//
} catch (IOException e) {
e.printStackTrace();
}
}
infos.setCode("1");
infos.setMsg(" ");
return infos ;
}2.単一ファイルアップロード
uploadを用意します.html
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Titletitle>
head>
<body>
<form action="http://localhost:4000/pdClientManagerSystem/customAnalysisConfig/upload" method="post" enctype="multipart/form-data">
<input type="file" name="file" value="Select your file: ">
<input type="submit" value="Upload">
form>
body>
html>ここのname=「file」に注意
//
@RequestMapping(value = "/upload")
public String upload(MultipartFile file) {
try {
if (file.isEmpty()) {
return "file is empty";
}
String fileName = file.getOriginalFilename();//
String suffixName = fileName.substring(fileName.lastIndexOf("."));//
log.info(" ：" + fileName + " " + suffixName);
// (D ), 。
String filePath = "D:/upload";
// =filePath+/+ fileName
String path = filePath + "/" + fileName;
File dest = new File(path);
//
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdirs();//
}
file.transferTo(dest);// path
return "upload success";
} catch (Exception e) {
e.printStackTrace();
}
return "upload failure";
}3.マルチファイルアップロード
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> title>
head>
<body>
<form method="post" action="/batch" enctype="multipart/form-data">
<input type="file" name="file"><br>
<input type="file" name="file"><br>
<input type="file" name="file"><br>
<br>
<input type="submit" value=" ">
form>
body>
html>JAvaコード
//
@RequestMapping("/batch")
public String handleFileUpload(HttpServletRequest request) {
List files = ((MultipartHttpServletRequest) request).getFiles("file");
MultipartFile file = null;
BufferedOutputStream stream = null;
for (int i = 0; i < files.size(); ++i) {
file = files.get(i);
String filePath = "D:/uploads";
if (!file.isEmpty()) {
try {
byte[] bytes = file.getBytes();
stream = new BufferedOutputStream(new FileOutputStream(
new File(filePath + "/" + file.getOriginalFilename())));
stream.write(bytes);//
stream.close();
} catch (Exception e) {
stream = null;
return "the " + i + " file upload failure";
}
} else {
return "the " + i + " file is empty";
}
}
return "upload Multifile success";
} /**
*
* @param response
* @return
*/
@RequestMapping("/downLoadTemplateExcel")
public Info downLoadTemplateExcel(HttpServletResponse response){
logger.info("/customAnalysisConfig/downLoadTemplateExcel");
Info infos=new Info();
//
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
//String url = "C:/Users/admin/Desktop/test.xlsx";
String url =null;
if(environment.equals("local")){//
url ="C:/Users/admin/Desktop/test.xlsx";
}else {//
url = "/usr/java/test.xlsx";
}
String downLoadPath = url;
String fileName="template.xlsx";//
File file2 = new File(downLoadPath);//
if (!file2.exists()) {// ,
file2.mkdirs();
}
long fileLength = file2.length();//
try {
//Content-Disposition: attachment; filename="filename.xls"
// attachment（ ； “ ” ，
// filename ， ）
response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("utf-8"), "ISO8859-1"));
//Content-Type MIME media type
response.setHeader("Content-Type", "application/json");
//Content-Length, HTTP ,
response.setHeader("Content-Length", String.valueOf(fileLength));
//
bis = new BufferedInputStream(new FileInputStream(downLoadPath));
bos = new BufferedOutputStream(response.getOutputStream());
//
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
}catch (Exception e){
e.printStackTrace();
}finally {
if (bis != null)
try {
bis.close();//
} catch (IOException e) {
e.printStackTrace();
}
if (bos != null)
try {
bos.close();//
} catch (IOException e) {
e.printStackTrace();
}
}
infos.setCode("1");
infos.setMsg(" ");
return infos ;
}