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Main.java
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106 lines (90 loc) · 3.49 KB
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import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
public class Main {
public static void main(String[] args) throws IOException {
// 0x00. Java 实例 - 递归创建目录
String directories = "D:\\a\\b\\c\\d\\e\\f\\g\\h\\i";
File file = new File(directories);
boolean result = file.mkdirs();
System.out.println("Status = " + result);
// 0x01. Java 实例 - 删除目录
deleteDir(new File("D:\\dist"));
// 0x02. Java 实例 - 判断目录是否为空
if (file.isDirectory()) {
if (file.list().length > 0) {
System.out.println("目录不为空!");
} else {
System.out.println("目录为空!");
}
} else {
System.out.println("这不是一个目录!");
}
// 0x03. Java 实例 - 判断文件是否隐藏
System.out.println(file.isHidden());
// 0x04. Java 实例 - 获取目录大小
System.out.println(FileUtils.sizeOfDirectory(file));
// 0x05. Java 实例 - 获取文件的上级目录
System.out.println("文件的上级目录为 : " + file.getParent());
// 0x06. Java 实例 - 获取目录最后修改时间
System.out.println(file.lastModified());
// 0x07. Java 实例 - 打印目录结构
showDir(1, new File("D:\\appservice"));
// 0x08. Java 实例 - 在指定目录中查找文件
FilenameFilter filter = new FilenameFilter() {
public boolean accept
(File dir, String name) {
return name.startsWith("c");
}
};
String[] children = new File("D:\\appservice\\service.config").list(filter);
if (children == null || children.length < 1) {
System.out.println("目录不存在或它不是一个目录");
} else {
for (int i = 0; i < children.length; i++) {
String filename = children[i];
System.out.println(filename);
}
}
// 0x09. Java 实例 - 查看系统根目录
File[] roots = File.listRoots();
System.out.println("系统所有根目录：");
for (int i=0; i < roots.length; i++) {
System.out.println(roots[i].toString());
}
// 0x0a. Java 实例 - 查看当前工作目录
String curDir = System.getProperty("user.dir");
System.out.println("你当前的工作目录为 :" + curDir);
}
public static void showDir(int indent, File file) throws IOException {
for (int i = 0; i < indent; i++) {
System.out.print("-");
}
System.out.println(file.getName());
if (file.isDirectory()) {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
showDir(indent + 4, files[i]);
}
}
}
public static boolean deleteDir(File file) {
if (file.isDirectory()) {
String[] files = file.list();
for (String path : files) {
boolean success = deleteDir(new File(file, path));
if (!success) {
return false;
}
}
}
if (file.delete()) {
System.out.println("目录已被删除！");
return true;
} else {
System.out.println("目录删除失败！");
return false;
}
}
}