1.
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(文件已经删除!);
}
else
{
file.createNewFile();
result = true;
System.out.println(文件已经创建!);
}
return result;
}
创建和删除目录
@param folderName
@param filePath
@return 删除成功返回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(目录已经存在,已删除!);
result = true;
}
else
{
file.mkdir();
System.out.println(目录不存在,已经建立!);
result = true;
}
}
catch(Exception ex)
{
result = false;
System.out.println(CreateAndDeleteFolder is error+ex);
}
return result;
}
输出目录中的所有文件及目录名字
@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());
}
}
}
检查文件中是否为一个空
@param filePath
@param fileName
@return 为空返回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+ 文件中没有数据!);
}
else
{
System.out.println(fileName+ 文件中有数据!);
}
fr.close();
return result;
}
读取文件中的所有内容
@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();
}
一行一行的读取文件中的数据
@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();
}
}
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(文件已经删除!);
}
else
{
file.createNewFile();
result = true;
System.out.println(文件已经创建!);
}
return result;
}
创建和删除目录
@param folderName
@param filePath
@return 删除成功返回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(目录已经存在,已删除!);
result = true;
}
else
{
file.mkdir();
System.out.println(目录不存在,已经建立!);
result = true;
}
}
catch(Exception ex)
{
result = false;
System.out.println(CreateAndDeleteFolder is error+ex);
}
return result;
}
输出目录中的所有文件及目录名字
@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());
}
}
}
检查文件中是否为一个空
@param filePath
@param fileName
@return 为空返回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+ 文件中没有数据!);
}
else
{
System.out.println(fileName+ 文件中有数据!);
}
fr.close();
return result;
}
读取文件中的所有内容
@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();
}
一行一行的读取文件中的数据
@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();
}
}
解决方案 »
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