引入依赖
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
测试
String fileDirectory = "D:/aa/bb/cc";
String fileName ="file.txt";
String fileFullName = fileDirectory +"/"+ fileName;
System.out.println("(1)显示linux路径:"+FilenameUtils.normalizeNoEndSeparator(fileFullName));
System.out.println("(2)合并目录和文件名为文件全路径:"+FilenameUtils.concat(fileDirectory, fileName));
System.out.println("(3)文件路径去除目录和后缀后的文件名:"+FilenameUtils.getBaseName(fileFullName));
System.out.println("(4)获取文件的后缀:"+FilenameUtils.getExtension(fileFullName));
System.out.println("(5)获取文件的完整目录:"+FilenameUtils.getFullPath(fileFullName));
System.out.println("(6)获取文件的目录不包含结束符:"+FilenameUtils.getFullPathNoEndSeparator(fileFullName));
System.out.println("(7)获取文件名称,包含后缀:"+FilenameUtils.getName(fileFullName));
System.out.println("(8)去除前缀的路径:"+FilenameUtils.getPath(fileFullName));
System.out.println("(9)去除前缀并结尾去除分隔符:"+FilenameUtils.getPathNoEndSeparator(fileFullName));
System.out.println("(10)获取前缀:"+FilenameUtils.getPrefix(fileFullName));
System.out.println("(11)获取前缀长度:"+FilenameUtils.getPrefixLength(fileFullName));
System.out.println("(12)获取最后一个.的位置:"+FilenameUtils.indexOfExtension(fileFullName));
System.out.println("(13)获取最后一个/的位置:"+FilenameUtils.indexOfLastSeparator(fileFullName));
System.out.println("(14)获取当前系统格式化路径:"+FilenameUtils.normalize(fileFullName));
System.out.println("(16)获取当前系统无结尾分隔符的路径:"+FilenameUtils.normalizeNoEndSeparator(fileDirectory));
System.out.println("(17)获取linux系统无结尾分隔符的路径:"+FilenameUtils.normalizeNoEndSeparator(fileDirectory));
System.out.println("(18)移除文件的扩展名:"+FilenameUtils.removeExtension(fileFullName));
System.out.println("(19)转换分隔符为当前系统分隔符:"+FilenameUtils.separatorsToSystem(fileFullName));
System.out.println("(20)转换分隔符为linux系统分隔符:"+FilenameUtils.separatorsToUnix(fileFullName));
System.out.println("(21)转换分隔符为windows系统分隔符:"+FilenameUtils.separatorsToWindows(fileFullName));
String linuxFileName = FilenameUtils.normalize(fileFullName);
System.out.println("(23)判断文件路径是否相同:"+FilenameUtils.equals(fileFullName, linuxFileName));
System.out.println("(25)判断文件路径是否相同,格式化并大小写敏感:"
+ FilenameUtils.equalsNormalized(fileFullName, linuxFileName));
System.out.println("(26)判断文件路径是否相同,不格式化,大小写敏感根据系统规则:windows:敏感;linux:不敏感:"
+ FilenameUtils.equalsOnSystem(fileFullName, linuxFileName));
System.out.println("(28)判断文件扩展名是否等于指定扩展名:"
+ FilenameUtils.isExtension(fileFullName, "txt"));
System.out.println("(29)判断文件扩展名是否包含在指定字符串数组中:"
+ FilenameUtils.isExtension(fileFullName, new String[]{
"txt","java"}));
System.out.println("(30)判断文件扩展名是否和指定规则匹配,大小写敏感:"
+ FilenameUtils.wildcardMatch(fileName, "*.???"));
System.out.println("(32)判断文件扩展名是否和指定规则匹配,根据系统判断敏感型:windows:不敏感;linux:敏感:"
+ FilenameUtils.wildcardMatchOnSystem(fileName, "*.???"));