在 java 中重命名文件同时保留文件扩展名
Rename the file while preserving file extension in java
如何通过保留文件扩展名来重命名文件?
就我而言,我想在上传文件时重命名文件。我正在使用 Apache commons fileupload 库。
下面是我的代码片段。
File uploadedFile = new File(path + "/" + fileName);
item.write(uploadedFile);
//renaming uploaded file with unique value.
String id = UUID.randomUUID().toString();
File newName = new File(path + "/" + id);
if(uploadedFile.renameTo(newName)) {
} else {
System.out.println("Error");
}
上面的代码也改变了文件扩展名。我怎样才能保存它?
apache commons文件上传库有什么好的方法吗?
尝试拆分并只采用扩展的拆分:
String[] fileNameSplits = fileName.split("\.");
// extension is assumed to be the last part
int extensionIndex = fileNameSplits.length - 1;
// add extension to id
File newName = new File(path + "/" + id + "." + fileNameSplits[extensionIndex]);
一个例子:
public static void main(String[] args){
String fileName = "filename.extension";
System.out.println("Old: " + fileName);
String id = "thisIsAnID";
String[] fileNameSplits = fileName.split("\.");
// extension is assumed to be the last part
int extensionIndex = fileNameSplits.length - 1;
// add extension to id
System.out.println("New: " + id + "." + fileNameSplits[extensionIndex]);
}
BONUS - CLICK ME
如何通过保留文件扩展名来重命名文件?
就我而言,我想在上传文件时重命名文件。我正在使用 Apache commons fileupload 库。
下面是我的代码片段。
File uploadedFile = new File(path + "/" + fileName);
item.write(uploadedFile);
//renaming uploaded file with unique value.
String id = UUID.randomUUID().toString();
File newName = new File(path + "/" + id);
if(uploadedFile.renameTo(newName)) {
} else {
System.out.println("Error");
}
上面的代码也改变了文件扩展名。我怎样才能保存它? apache commons文件上传库有什么好的方法吗?
尝试拆分并只采用扩展的拆分:
String[] fileNameSplits = fileName.split("\.");
// extension is assumed to be the last part
int extensionIndex = fileNameSplits.length - 1;
// add extension to id
File newName = new File(path + "/" + id + "." + fileNameSplits[extensionIndex]);
一个例子:
public static void main(String[] args){
String fileName = "filename.extension";
System.out.println("Old: " + fileName);
String id = "thisIsAnID";
String[] fileNameSplits = fileName.split("\.");
// extension is assumed to be the last part
int extensionIndex = fileNameSplits.length - 1;
// add extension to id
System.out.println("New: " + id + "." + fileNameSplits[extensionIndex]);
}
BONUS - CLICK ME