一、获取文件扩展名(该段代码来自博客园网站装男人的博客https://www.cnblogs.com/nanrenzhuang/archive/2013/05/19/6315546.html)
public static String getExtensionName(String filename) {
if ((filename != null) && (filename.length() > 0)) {
int dot = filename.lastIndexOf('.');
if ((dot >-1) && (dot < (filename.length() - 1))) {
return filename.substring(dot + 1);
}
}
return filename;
}
二、获取不带扩展名的文件名（该段代码来自博客园网站装男人的博客https://www.cnblogs.com/nanrenzhuang/archive/2013/05/19/6315546.html）
public static String getFileNameNoEx(String filename) {
if ((filename != null) && (filename.length() > 0)) {
int dot = filename.lastIndexOf('.');
if ((dot >-1) && (dot < (filename.length()))) {
return filename.substring(0, dot);
}
}
return filename;
}
三、获取文件大小
String path = "PATH"; //该处填入文件路径
File f = new File(path);
int size = new FileInputStream(f).available() / 1024 / 1024; //结果以M为单位