89 lines
2.9 KiB
Java
89 lines
2.9 KiB
Java
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package com.engine.salary.util;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.util.HashSet;
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import java.util.Objects;
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import java.util.Set;
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public class FileUtils {
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private static final String COPY_FILE_SUFFIX = "_副本";
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/**
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* 将输入流写入文件
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* @param in 输入流
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* @param path 输出文件的路径
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* @param fileName 输出文件的名称
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*
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* */
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public static void writeFile(InputStream in , String path , String fileName) throws FileNotFoundException {
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FileOutputStream outputStream = new FileOutputStream("");
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}
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/**
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* 给定一个目录和文件，若该目录存在名称相同的文件，则返回一个可用的副本文件名，否则直接返回输入的文件名。
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* @param path 文件的目录
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* @param fileName 文件名
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* @return 可用的文件名
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* */
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public static String getAvailableName(String path ,String fileName){
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File filePath = new File(path);
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String suffix = fileName.substring(fileName.lastIndexOf("."));
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File[] files = filePath.listFiles( f -> f.getName().endsWith(suffix) );
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if ( Objects.isNull(files) ) return fileName;
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Set<String> fileNameSet = new HashSet<>();
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for (File file: files ) {
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fileNameSet.add(file.getName().substring(0 , file.getName().lastIndexOf(".")));
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}
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boolean isExist = true;
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int count = 1;
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String tempFileName = fileName.substring(0,fileName.lastIndexOf("."));
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String tempFileName1 = tempFileName;
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while(isExist){
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if (fileNameSet.contains(tempFileName)){
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tempFileName = tempFileName1 + COPY_FILE_SUFFIX + count++;
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}else{
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isExist = false;
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}
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}
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return tempFileName + suffix;
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}
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/**
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* 给定一个文件的完整路径，若该文件已经存在，则返回一个可用的副本文件名，否则直接返回输入的文件名。
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* @param fullPath 文件的完整路径
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* @return 可用的文件名
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* */
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public static String getAvailableName( String fullPath ){
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File file = new File(fullPath);
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if ( !file.isFile() ) throw new RuntimeException( String.format("not a file [%s].",fullPath));
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return getAvailableName( file.getParent() ,file.getName() );
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}
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/**
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* 给定一个文件的完整路径，若该文件已经存在，则返回一个完整可用的副本文件名，否则直接返回输入的文件名。
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* @param fullPath 文件的完整路径
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* @return 完整可用的文件名
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* */
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public static String getAvailableFullName( String fullPath ){
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File file = new File(fullPath);
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if ( !file.isFile() ) throw new RuntimeException( String.format("not a file [%s].",fullPath));
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return file.getParent() + File.separator + getAvailableName(fullPath);
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}
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}
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