1、判断文件是否存在
File file = new File("d:\\study\\temp\\test.java");
boolean bl = file.exists();
2、更名文件名
File srcFile = new File("d:\\study\\temp\\test.javav");
File desFile = new File("d:\\study\\temp\\testnew.java");
boolean bln = srcFile.renameTo(desFile);
3、删除文件
File file = new File("d:\\study\\temp\\test.java");
boolean bl = file.exists();
if(file.exists())
{
bl = file.delete();
}
4、创建目录
file.mkdir();