使用 JAVA 从目录中检索所有 XML 文件名
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Retrieve all XML file names from a directory using JAVA
提问by user3089869
I have a directory with multiple files. I need to retrieve only XML file names in a List using Java. How can I accomplish this?
我有一个包含多个文件的目录。我只需要使用 Java 检索列表中的 XML 文件名。我怎样才能做到这一点？
采纳答案by BlackPOP
Try this, {FilePath} is directory path:
试试这个，{FilePath} 是目录路径：
public static void main(String[] args) {
File folder = new File("{FilePath}");
File[] listOfFiles = folder.listFiles();
for(int i = 0; i < listOfFiles.length; i++){
String filename = listOfFiles[i].getName();
if(filename.endsWith(".xml")||filename.endsWith(".XML")) {
System.out.println(filename);
}
}
}
回答by Stephan
You can use also a FilenameFilter:
您还可以使用 FilenameFilter：
import java.io.File;
import java.io.FilenameFilter;
public class FileDemo implements FilenameFilter {
String str;
// constructor takes string argument
public FileDemo(String ext) {
str = "." + ext;
}
// main method
public static void main(String[] args) {
File f = null;
String[] paths;
try {
// create new file
f = new File("c:/test");
// create new filter
FilenameFilter filter = new FileDemo("xml");
// array of files and directory
paths = f.list(filter);
// for each name in the path array
for (String path : paths) {
// prints filename and directory name
System.out.println(path);
}
} catch (Exception e) {
// if any error occurs
e.printStackTrace();
}
}
@Override
public boolean accept(File dir, String name) {
return name.toLowerCase().endsWith(str.toLowerCase());
}
}
回答by Dragon
You can filter by using File.filter(FileNameFilter). Provide your implementation for FileNameFilter
您可以使用 File.filter(FileNameFilter) 进行过滤。提供您对 FileNameFilter 的实现
回答by user3548196
File f = new File("C:\");
if (f.isDirectory()){
FilenameFilter filter = new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
if(name.endsWith(".xml")){
return true;
}
return false;
}
};
if (f.list(filter).length > 0){
/* Do Something */
}
}
