问题描述
public void newEditSportRecord(){
String filepath = "sport.txt"; //exists in C:\Users\Dell\Documents\NetBeansprojects\Assignment\
String editTerm = JOptionPane.showInputDialog("Enter ID of Sport you wish to modify:");
String tempFile = "temp.txt"; // to be created in C:\Users\Dell\Documents\NetBeansprojects\Assignment\
File oldFile = new File(filepath);
System.out.println(oldFile.getAbsolutePath()); // prints C:\Users\Dell\Documents\NetBeansprojects\Assignment\sport.txt
File newFile = new File(tempFile);
System.out.println(newFile.getAbsolutePath()); // prints C:\Users\Dell\Documents\NetBeansprojects\Assignment\temp.txt
String ID,name = "";
try {
FileWriter fw = new FileWriter(tempFile,true);
BufferedWriter bw = new BufferedWriter(fw);
PrintWriter pw = new PrintWriter(bw);
x = new Scanner(new File(filepath));
while (x.hasNextLine()) {
ID = x.next();
System.out.println(ID);
name = x.next();
System.out.println(name);
if (ID.equals(editTerm)) {
newID = JOptionPane.showInputDialog("Enter new Sport ID:");
newName = JOptionPane.showInputDialog("Enter new Sport Name:");
pw.println(newID);
pw.println(newName);
pw.println();
JOptionPane.showMessageDialog(modifySport,"Record Modified");
} else {
pw.println(ID);
pw.println(name);
pw.println();
}
}
x.close();
pw.flush();
pw.close();
oldFile.delete();
File dump = new File(filepath);
newFile.renameto(dump);
} catch (Exception ex) {
JOptionPane.showMessageDialog(modifySport,ex);
}
}
我有以下功能来尝试修改文本文件。但是,它不会删除原始文件“sport.txt”,也不会将“temp.txt”重命名为“sport.txt”。它确实从文件中读取并创建“sport.txt”的副本,并将所有相关修改作为“temp.txt”。我曾怀疑这是作家的问题,但已关闭所有作家,问题仍然存在。这是否仅仅是因为文件夹存在于本地磁盘上的 Documents 文件夹中的权限问题?
解决方法
是的,这是一个权限问题。要么更改 Documents 文件夹的权限并为您的用户授予所有权限,要么更改您的工作文件夹。