package testfiles;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;


@author coffee
To change the template for this generated type comment go to
WindowPreferencesJavaCode GenerationCode and Comments

public class Files
{
public static void main(String[] args) throws IOException
{
Files f = new Files();
System.out.println(f.readFile(fLinkFile.java));
f.readAllFile(f,LinkFile.java);
f.readLineFile(f,LinkFile.java);
System.out.println(f.fileIsNull(f,122.txt));
f.readFolderByFile(FPDF);
System.out.println(f.createAndDeleteFolder(ss,f));
System.out.println(f.createAndDeleteFile(fss,TestFile.dat));
String[] ss = new String[50];
for(int i=0;iss.length;i++)
{
ss[i] = 信息技術和互聯網(計算機軟硬件,通訊) +i;
}
f.writeFile(fss,TestFile.txt,ss);
}

文件的寫入
@param filePath(文件路徑)
@param fileName(文件名)
@param args[]
@throws IOException

public void writeFile(String filePath,String fileName,String[] args) throws IOException
{
FileWriter fw = new FileWriter(filePath+fileName);
PrintWriter out=new PrintWriter(fw);
for(int i=0;iargs.length;i++)
{
out.write(args[i]);
out.println();
out.flush();
}
fw.close();
out.close();
}

文件的寫入
@param filePath(文件路徑)
@param fileName(文件名)
@param args
@throws IOException

public void writeFile(String filePath,String fileName,String args) throws IOException
{
FileWriter fw = new FileWriter(filePath+fileName);
fw.write(args);
fw.close();
}

創建與刪除文件
@param filePath
@param fileName
@return 創建成功返回true
@throws IOException

public boolean createAndDeleteFile(String filePath,String fileName) throws IOException
{
boolean result = false;
File file = new File(filePath,fileName);
if(file.exists())
{
file.delete();
result = true;
System.out.println(文件已經刪除！);
}
else
{
file.createNewFile();
result = true;
System.out.println(文件已經創建！);
}
return result;
}

創建和刪除目錄
@param folderName
@param filePath
@return 刪除成功返回true

public boolean createAndDeleteFolder(String folderName,String filePath)
{
boolean result = false;
try
{
File file = new File(filePath+folderName);
if(file.exists())
{
file.delete();
System.out.println(目錄已經存在，已刪除!);
result = true;
}
else
{
file.mkdir();
System.out.println(目錄不存在，已經建立!);
result = true;
}
}
catch(Exception ex)
{
result = false;
System.out.println(CreateAndDeleteFolder is error+ex);
}
return result;
}

輸出目錄中的所有文件及目錄名字
@param filePath

public void readFolderByFile(String filePath)
{
File file = new File(filePath);
File[] tempFile = file.listFiles();
for(int i = 0;itempFile.length;i++)
{
if(tempFile[i].isFile())
{
System.out.println(File +tempFile[i].getName());
}
if(tempFile[i].isDirectory())
{
System.out.println(Directory +tempFile[i].getName());
}
}
}

檢查文件中是否為一個空
@param filePath
@param fileName
@return 為空返回true
@throws IOException

public boolean fileIsNull(String filePath,String fileName) throws IOException
{
boolean result = false;
FileReader fr = new FileReader(filePath+fileName);
if(fr.read() == -1)
{
result = true;
System.out.println(fileName+ 文件中沒有數據!);
}
else
{
System.out.println(fileName+ 文件中有數據!);
}
fr.close();
return result;
}

讀取文件中的所有內容
@param filePath
@param fileName
@throws IOException

public void readAllFile(String filePath,String fileName) throws IOException
{
FileReader fr = new FileReader(filePath+fileName);
int count = fr.read();
while(count != -1)
{
System.out.print((char)count);
count = fr.read();
if(count == 13)
{
fr.skip(1);
}
}
fr.close();
}

一行一行的讀取文件中的數據
@param filePath
@param fileName
@throws IOException

public void readLineFile(String filePath,String fileName) throws IOException
{
FileReader fr = new FileReader(filePath+fileName);
BufferedReader br = new BufferedReader(fr);
String line = br.readLine();
while(line != null)
{
System.out.println(line);
line = br.readLine();
}
br.close();
fr.close();
}
}