Java 文件操作
//
String path=";
File f=new File(path);//(path,path1) init
boolean b=f.exists();//exist?true\fal
boolean c=f.creatNewFile();//create success?tur\fal
boolean d=f.mkdir();//createdir f.mkdirs("a//b//c");
boolean e=f.delete();//delete
Sting h=f.getName();//getAbsolutePath();
boolean i=f.renameTo(f2);//renameTo(File)
boolean j=f.canRead();//can?tur\fal
boolean k=f.isDirectory();//yes?tur\fal isFile() isHidden()
File[] files=f.listFiles();
for(File f1:files)
{
System.out.println(f1.girName());
}
Java 流
文件流
字节
FileOutputStream out=new FileOutputStream("");//未找到创建
String str="";
byte[] buffer=str.getBytes();
out.write(buffer);
out.close();
FileInputStream in=new FileImageInputStream("");// 未找到异常
int a;
while((a=in.read())!=-1)
{
System.out.println((char)a);
}
in.close();
字符
FileWriter out=new FileWriter("");
Sting str="";
out.write(str);
out.close();
FileReader in=new FileReader("");
int c;
while((c=in.read)!=-1)
{
System.out.println((char)c);
}
缓冲流
字节
BufferOutputStream bos=new BufferedOutputStream(out);
bos.write(byte[]);
bos.close();
BufferedInputStream bis=new BuffereInputStream(in);
bis.read(byte[]);
bis.close();
字符
BufferdWriter bw=new BufferWriter(out);
bw.Write("");
bw.close();
BufferedReader br=new BufferedReader(in);
while((s=br.readLine())!=null)
System.out.println(s);
br.close();
转换流
new OutputStreamwriter(new FileOutputStream(""));//字节->字符
new InputStreamReader(System.in);
打印流
PrintStream ps=new PrintStream(in);
System.setOut(ps);//输出重定向
System.out.println();
数据流
DataOutputStream;
DataInputStream;
对象流
ObjectInputStream;
ObjectOutputStream;
implements Serializable接口
translent 忽略序列化
