英文:
java.io.FileNotFoundException (No such file or directory) - Download File
问题
以下是您提供的代码的翻译部分：
上传功能的代码片段：
String destDir = "/usr/local/apache-tomcat-8.5.31/OSS-CPE-Tracker/Zaky";
for (FileItem item : multiparts) {
if (!item.isFormField()) {
String name = new File(item.getName()).getName();
if(name.equalsIgnoreCase("QCAM.rar")) {
File destFile = new File(destDir, "QCAM.rar");
if (destFile.exists()) {
destFile.delete();
}
item.write(new File("/usr/local/apache-tomcat-8.5.31/OSS-CPE-Tracker/Zaky" + File.separator + name));
request.setAttribute("gurumessage", "文件上传成功");
} else {
request.setAttribute("gurumessage", "请使用约定的文件名");
}
}
}
下载功能的代码片段：
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String gurufile = "QCAM.rar";
String gurupath = "/usr/local/apache-tomcat-8.5.31/OSS-CPE-Tracker/Zaky";
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=\"" + gurufile + "\"");
FileInputStream fileInputStream = new FileInputStream(gurupath + gurufile);
int i;
while ((i = fileInputStream.read()) != -1) {
out.write(i);
}
fileInputStream.close();
out.close();
英文:
I have Web Application hosted on Linux, contains page to upload .rar file and another page to download it. for upload function working fine and file uploaded successfully to server but for download it gives me below exception:
[servelt.scriptdownloadservelt] in context with path [/OSS-CPE-Tracker] threw exception
java.io.FileNotFoundException: \usr\local\apache-tomcat-8.5.31\OSS-CPE-Tracker\Zaky\QCAM.rar (No such file or directory)
I used below funcation to make upload:
String destDir = "/usr/local/apache-tomcat-8.5.31/OSS-CPE-Tracker/Zaky";
for (FileItem item : multiparts) {
if (!item.isFormField()) {
String name = new File(item.getName()).getName();
if(name.equalsIgnoreCase("QCAM.rar")) {
File destFile = new File(destDir, "QCAM.rar");
if (destFile.exists()) {
destFile.delete();
}
item.write(new File("/usr/local/apache-tomcat-8.5.31/OSS-CPE-Tracker/Zaky" + File.separator + name));
request.setAttribute("gurumessage", "File Uploaded Successfully");
}else {
request.setAttribute("gurumessage", "Kindly use the agreed name");
}
and here function for download that i face issue on it and above exception appear:
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String gurufile = "QCAM.rar\\";
String gurupath = "\\usr\\local\\apache-tomcat-8.5.31\\OSS-CPE-Tracker\\Zaky";
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=\""
+ gurufile + "\"");
FileInputStream fileInputStream = new FileInputStream(gurupath
+ gurufile);
int i;
while ((i = fileInputStream.read()) != -1) {
out.write(i);
}
fileInputStream.close();
out.close();
答案1
得分: 1
这个错误的唯一原因是文件在该路径下找不到。
请验证路径
String gurufile = "QCAM.rar\\";
String gurupath = "\\usr\\local\\apache-tomcat-8.5.31\\OSS-CPE-Tracker\\Zaky";
// <...>
FileInputStream fileInputStream = new FileInputStream(gurupath
+ gurufile);
在Unix系统中，文件路径使用正斜杠/解析，而不是反斜杠\。
尝试将其更改为与您的upload脚本相同的值：
FileInputStream fileInputStream = new FileInputStream("/usr/local/apache-tomcat-8.5.31/OSS-CPE-Tracker/Zaky/QCAM.rar")
应该可以解决问题。
英文:
The only reason for this error is that file cannot be found under that path.
Please verify the path
String gurufile = "QCAM.rar\\";
String gurupath = "\\usr\\local\\apache-tomcat-8.5.31\\OSS-CPE-Tracker\\Zaky";
// <...>
FileInputStream fileInputStream = new FileInputStream(gurupath
+ gurufile);
In unix systems file path is resolved using forward slash / and not a backslash \.
Try changing to the same value as your upload script:
FileInputStream fileInputStream = new FileInputStream("/usr/local/apache-tomcat-8.5.31/OSS-CPE-Tracker/Zaky/QCAM.rar")
That should do
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论