我试图从 JfileChooser 选择一个目录，然后迭代该目录，读取所有文件并将它们全部写入一个大 HTML 文件中，以便于查看。以下是完成此操作的代码片段:
else if(arg0.getSource()==generate){
//Create HTML report in same directory that file(s) came from
try{
fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int returnval = fileChooser.showSaveDialog(this);
if(returnval == JFileChooser.APPROVE_OPTION){
File fileName = new File( "./report.html" );
BufferedWriter bw = new BufferedWriter(new FileWriter(fileName));
bw.write("<html>");
bw.write("<body>");
bw.write("<h1>Graded Assignment</h1>");
bw.write("<p>");
//for loop here that appends all the files in a directory
File directory = new File(fileChooser.getSelectedFile().getAbsolutePath());
for( File f : directory.listFiles() ){
FileInputStream fstream = new FileInputStream(f);
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
bw.write(br.readLine() + "\n");
}
bw.write("</p>");
bw.write("</body>");
bw.write("</html>");
bw.close();
Desktop.getDesktop().browse(fileName.toURI());
}
}
catch(FileNotFoundException fnf){
fnf.printStackTrace();
}
catch(IOException io){
io.printStackTrace();
}
它将进入 for 循环，但不会在第一个文件中读取。我收到某种 AWT-EventQueue 错误。谁能重现这个并告诉我问题可能是什么？谢谢。
最佳答案
如评论中所示，您应该检查它是否是目录并采取适当的措施:
File directory = new File(fileChooser.getSelectedFile().getAbsolutePath());
getFiles(directory);//calls method to get all the files in the directory
...
void getFiles(File directory) {
for( File f : directory.listFiles() ){
if(!f.isDirectory()) {//is a file lets read it
FileInputStream fstream = new FileInputStream(f);
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
bw.write(br.readLine() + "\n");
}else {//wil make it a recursive search
getFiles(f);
}
}
}
尽管我给出的方法也进行递归文件搜索，如果给定目录中有一个目录，它将遍历其所有目录获取所有文件
附录:
您应该使用:chooser.showOpenDialog()，而不是chooser.showSaveDialog()，请参阅此处的示例:
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int returnVal = chooser.showOpenDialog(parent);//this must be changed
if(returnVal == JFileChooser.APPROVE_OPTION) {
System.out.println("You chose to open this file: " +
chooser.getAbsolutePath());
}
引用文献:
关于java - 遍历目录，读入文件，并将它们打印到 html 文件中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11420547/