java文件IO操作

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package com.io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.PrintWriter;

public class FileOperate {
    /**
      * 新建目录
      * @param folderPath String 如 c:/fqf
      * @return boolean
      */
    public static void newFolder(String folderPath) {
        try {
            String filePath = folderPath;
            File myFilePath = new File(filePath);
            if (!myFilePath.exists()) {
                myFilePath.mkdir();
            }
        }
        catch (Exception e) {
            System.out.println("新建目录操作出错");
            e.printStackTrace();
        }
    }


    /**
      * 新建文件
      * @param filePathAndName String 文件路径及名称如c:/fqf.txt
      * @param fileContent String 文件内容
      * @return boolean
      */
    public static void newFile(String filePathAndName, String fileContent) {

        try {
            String filePath = filePathAndName;
            File myFilePath = new File(filePath);
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
                System.out.println("创建文件成功");
            }
            FileWriter resultFile = new FileWriter(myFilePath);
            PrintWriter myFile = new PrintWriter(resultFile);
            myFile.println(fileContent);
            System.out.println("写入文件成功");
            resultFile.close();
        }
        catch (Exception e) {
            System.out.println("新建文件操作出错");
            e.printStackTrace();
        }
    }

    /**
      * 删除文件
      * @param filePathAndName String 文件路径及名称如c:/fqf.txt
      * @param fileContent String
      * @return boolean
      */
    public static void delFile(String filePathAndName) {
        try {
            File myDelFile = new File(filePathAndName);
            myDelFile.delete();
            System.out.println("删除文件成功!");
        }
        catch (Exception e) {
            System.out.println("删除文件操作出错");
            e.printStackTrace();
        }
    }




    /**
      * 删除文件夹
      * @param filePathAndName String 文件夹路径及名称如c:/fqf
      * @param fileContent String
      * @return boolean
      */
    public void delFolder(String folderPath) {
        try {
            delAllFile(folderPath); //删除完里面所有内容
            File myFilePath = new File(folderPath);
            myFilePath.delete(); //删除空文件夹
        }
        catch (Exception e) {
            System.out.println("删除文件夹操作出错");
            e.printStackTrace();
        }
    }

    /**
      * 删除文件夹里面的所有文件
      * @param path String 文件夹路径如 c:/fqf
      */
    public void delAllFile(String path) {
        File file = new File(path);
        if (!file.exists()) {
            return;
        }
        if (!file.isDirectory()) //判读此抽象路径名表示的文件存在且是一个目录
        {
            return;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (path.endsWith(File.separator)) {
                temp = new File(path + tempList[i]);
            }
            else {
                temp = new File(path + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                delAllFile(path+"/"+ tempList[i]);//先删除文件夹里面的文件
                delFolder(path+"/"+ tempList[i]);//再删除空文件夹
            }
        }
    }

    /**
      * 复制单个文件
      * @param oldPath String 原文件路径如：c:/fqf.txt
      * @param newPath String 复制后路径如：f:/fqf.txt
      * @return boolean
      */
    public void copyFile(String oldPath, String newPath) {
        try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPath);
            if (oldfile.exists()) { //文件存在时
                InputStream inStream = new FileInputStream(oldPath); //读入原文件
                FileOutputStream fs = new FileOutputStream(newPath);
                byte[] buffer = new byte[1444];
                int length;
                while ( (byteread = inStream.read(buffer)) != -1) {
                    bytesum += byteread; //字节数文件大小
                    System.out.println(bytesum);
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
            }
        }
        catch (Exception e) {
            System.out.println("复制单个文件操作出错");
            e.printStackTrace();
        }
    }

    /**
      * 复制整个文件夹内容
      * @param oldPath String 原文件路径如：c:/fqf
      * @param newPath String 复制后路径如：f:/fqf/ff
      * @return boolean
      */
    public void copyFolder(String oldPath, String newPath) {
        try {
            (new File(newPath)).mkdirs(); //如果文件夹不存在则建立新文件夹
            File a=new File(oldPath);
            String[] file=a.list();
            File temp=null;
            for (int i = 0; i < file.length; i++) {
                if(oldPath.endsWith(File.separator)){
                    temp=new File(oldPath+file[i]);
                }
                else{
                    temp=new File(oldPath+File.separator+file[i]);
                }
                if(temp.isFile()){
                    FileInputStream input = new FileInputStream(temp);
                    FileOutputStream output = new FileOutputStream(newPath + "/" +
                            (temp.getName()).toString());
                    byte[] b = new byte[1024 * 5];
                    int len;
                    while ( (len = input.read(b)) != -1) {
                        output.write(b, 0, len);
                    }
                    output.flush();
                    output.close();
                    input.close();
                }
                if(temp.isDirectory()){//如果是子文件夹
                    copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
                }
            }
        }
        catch (Exception e) {
            System.out.println("复制整个文件夹内容操作出错");
            e.printStackTrace();
        }
    }

    /**
      * 移动文件到指定目录
      * @param oldPath String 如：c:/fqf.txt
      * @param newPath String 如：d:/fqf.txt
      */
    public void moveFile(String oldPath, String newPath) {
        copyFile(oldPath, newPath);
        delFile(oldPath);
    }

    /**
      * 移动文件到指定目录
      * @param oldPath String 如：c:/fqf.txt
      * @param newPath String 如：d:/fqf.txt
      */
    public void moveFolder(String oldPath, String newPath) {
        copyFolder(oldPath, newPath);
        delFolder(oldPath);

    }

     // 拷贝文件
    private void copyFile2(String source, String dest) {
    try {
     File in = new File(source);
     File out = new File(dest);
     FileInputStream inFile = new FileInputStream(in);
     FileOutputStream outFile = new FileOutputStream(out);
     byte[] buffer = new byte[1024];
     int i = 0;
     while ((i = inFile.read(buffer)) != -1) {
     outFile.write(buffer, 0, i);
    }//end while
     inFile.close();
     outFile.close();
    }//end try
    catch (Exception e) {

    }//end catch
    }//end copyFile
}