Java Temp File Create getUniqueFile(File dir, String prefix, String suffix)

Description

Get an unique name under the specified directory

License

Apache License

Parameter

Parameter	Description
dir	a parameter
prefix	a parameter
suffix	a parameter

Declaration

public static File getUniqueFile(File dir, String prefix, String suffix) 

Method Source Code

//package com.java2s;
/**************************************************************
 * // w ww.  j  ava 2  s  . co m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/

import java.io.File;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {
    private final static DateFormat FILENAME_FORMAT = new SimpleDateFormat("yyMMddHHmm");

    /**
     * Get an unique name under the specified directory
     * 
     * @param dir
     * @param prefix
     * @param suffix
     * @return
     */
    public static File getUniqueFile(File dir, String prefix, String suffix) {
        String name = prefix + "." + FILENAME_FORMAT.format(new Date()) + ".";
        for (int i = 0; i < Integer.MAX_VALUE; i++) {
            File file = new File(dir, name + i + suffix);
            if (!file.exists()) {
                return file;
            }
        }

        return null;
    }

    /**
     * Get an unique name under the specified directory
     * 
     * @param dir
     * @param prefix
     * @param suffix
     * @return
     */
    public static File getUniqueFile(String dir, String prefix, String suffix) {
        return getUniqueFile(new File(dir), prefix, suffix);
    }
}

Related

1. getTempFilePath(String name)
2. getTempFilePath(String signatureRequestId)
3. getTempFiles()
4. getTempFileWithFullPath()
5. getUniqueAFileName(String ext)
6. getUniqueFileName()
7. getUniqueFilename(String filename, String extension)
8. getUniqueFileName(String fileNamePrefix, String fileExtension)
9. getUniqueFileName(String originalFileName)