org.apache.commons.io.FilenameUtils#indexOfExtension ( )源码实例Demo

/**
 * Generate the conflict name of a file with help of the
 * current time and the conflict-suffix. Consider the example
 * hello_world.txt
 *
 * @param path to be renamed
 * @return The renamed version of the provided path. Example:
 *         hello_world_CONFLICT_2015-03-02_18-03-17.txt
 */
public static Path rename(Path path) {
	String pathString = path.toString();
	String renamedFileString = null;
	String conflictSuffix = "_CONFLICT_";

	// get index of extension (even works with files like "hello.world.txt")
	int indexOfExtension = FilenameUtils.indexOfExtension(pathString);

	String fileName = pathString.substring(0, indexOfExtension);
	String fileExtension = pathString.substring(indexOfExtension);

	renamedFileString = fileName + conflictSuffix + currentDate() + fileExtension;
	Path renamedFile = Paths.get(renamedFileString);

	return renamedFile;
}
 

public static File save(File file, Object data, ResourceFileType type) throws IOException {
    boolean hasExtension = FilenameUtils.indexOfExtension(file.getAbsolutePath()) != -1;
    File output = hasExtension ? file : type.addExtensionIfMissing(file);
    ensureDir(file);
    getObjectMapper(type).writeValue(output, data);
    return output;
}
 

@Override
public String pathWithoutExtension() {
  int index = FilenameUtils.indexOfExtension(fileName);
  if (index == -1) {
    return fileName;
  }

  return fileName.substring(0, index);
}
 

private String[] splitFileName(final String fullPathName) {
    final int extensionIndex;
    String baseName = FilenameUtils.getBaseName(fullPathName);
    if (fullPathName.endsWith(".gz") || fullPathName.endsWith(".zip")) {
        extensionIndex = FilenameUtils.indexOfExtension(baseName);
        baseName = fullPathName.substring(0, extensionIndex);
    } else {
        extensionIndex = FilenameUtils.indexOfExtension(fullPathName);
    }
    return new String[] { baseName, fullPathName.substring(extensionIndex)};
}
 

public static File[] getAllExactMatchingFiles(String sourceDir, String fileNamePrefix, String extension, List fileList, List skipList) {
    
    File libDir = new File(sourceDir);
    String libDirPath = libDir.getAbsolutePath();
    File[] items = libDir.listFiles();
    if (items != null) {
        for (int i = 0; i < items.length; i++) {
        	if(items[i].isDirectory()){
        		if(!skipList.contains(items[i].getName())){
        			getAllExactMatchingFiles(items[i].getPath(), fileNamePrefix, extension, fileList,skipList);
        		}
        	}else{
             String item = items[i].getName();
             
             String fileName = null;
             String ext = "";
             
             if(FilenameUtils.indexOfExtension(item)==-1){
		fileName=item;
	}else{
		fileName = FilenameUtils.removeExtension(item);
		ext = FilenameUtils.getExtension(item); 
	}
             
             if (fileNamePrefix != null && extension != null) {
                 if (fileNamePrefix.equalsIgnoreCase(fileName) && extension.equalsIgnoreCase(ext)) {
                     fileList.add(new File(libDirPath + File.separator + item));
                 }
             } else if (fileNamePrefix == null && extension != null) {
                 if (extension.equalsIgnoreCase(ext)) {
                     fileList.add(new File(libDirPath + File.separator + item));
                 }
             } else if (fileNamePrefix != null && extension == null) {
                 if (fileNamePrefix.equalsIgnoreCase(fileName)) {
                     fileList.add(new File(libDirPath + File.separator + item));
                 }
             } else {
                 fileList.add(new File(libDirPath + File.separator + item));
             }
        	}
        }
        return (File[]) fileList.toArray(new File[fileList.size()]);
    }
    return new File[0];
}