springboot文件上传--单文件上传
Posted xuemeng11
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1、前端页面
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form action="http://localhost:8083/fxglxt/testUploadFile" method="POST" enctype="multipart/form-data"> <p>单文件上传：<br/> <input type="file" name="file1"/> <input type="submit" value = "上传"/> </form> </body> </html>
2、后端上传方法，文件一共有三种上传路径
1、使用相对路径，文件保存路径为D:/fxglxt/target/classes/static/web/uploadFiles
2、使用绝对路径，文件上传到D:/fxglxt/src/main/resources/static/web/uploadFiles/文件夹下
3、使用绝对路径，文件上传到d://uploadFiles/文件夹下
/**
* 单文件上传
* @param req
* @param multiReq
*/
@RequestMapping(value = "/testUploadFile", method = RequestMethod.POST)
public void testUploadFile(HttpServletRequest req,
MultipartHttpServletRequest multiReq) {
// 获取上传文件的路径，uploadFilePath 其实是文件带后缀的名字
String uploadFilePath = multiReq.getFile("file1").getOriginalFilename();
System.out.println("uploadFlePath:" + uploadFilePath);
// 截取上传文件的文件名
String uploadFileName = uploadFilePath.substring(
uploadFilePath.lastIndexOf(‘\‘) + 1, uploadFilePath.indexOf(‘.‘));
System.out.println("multiReq.getFile()" + uploadFileName);
// 截取上传文件的后缀
String uploadFileSuffix = uploadFilePath.substring(
uploadFilePath.indexOf(‘.‘) + 1, uploadFilePath.length());
System.out.println("uploadFileSuffix:" + uploadFileSuffix);
FileOutputStream fos = null;
FileInputStream fis = null;
try {
//1、使用相对路径
//获取跟目录,文件保存路径为D:/fxglxt/target/classes/static/web/uploadFiles
// File path = new File(ResourceUtils.getURL("classpath:").getPath());
// if(!path.exists()) path = new File("");
// System.out.println("path:"+path.getAbsolutePath());
//
// //如果上传目录为/static/images/upload/，则可以如下获取：
// File upload = new File(path.getAbsolutePath(),"static/web/uploadFiles/");
// if(!upload.exists()) upload.mkdirs();
// System.out.println("upload url:"+upload.getAbsolutePath());
//
//
// fis = (FileInputStream) multiReq.getFile("file1").getInputStream();
// fos = new FileOutputStream(new File(path.getAbsolutePath(),"static/web/uploadFiles/"+ uploadFileName
// + ".")
// + uploadFileSuffix);
//2、使用绝对路径，文件上传到D:/fxglxt/src/main/resources/static/web/uploadFiles/文件夹下
String c=System.getProperty("user.dir");
System.out.println("c"+c);
fis = (FileInputStream) multiReq.getFile("file1").getInputStream();
fos = new FileOutputStream(new File(c+"/src/main/resources/static/web/uploadFiles/" + uploadFileName
+ ".")
+ uploadFileSuffix);
//3、使用绝对路径，文件上传到d://uploadFiles/文件夹下
// fis = (FileInputStream) multiReq.getFile("file1").getInputStream();
// fos = new FileOutputStream(new File(c+"d://uploadFiles/" + uploadFileName
// + ".")
// + uploadFileSuffix);
System.out.println("fos"+fos);
byte[] temp = new byte[1024];
int i = fis.read(temp);
while (i != -1){
fos.write(temp,0,temp.length);
fos.flush();
i = fis.read(temp);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
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