Java中常用的代码

对Java很菜鸟, 收录一些java中经常需要使用的代码

1). JAVA操作文本文件

public class TestFile2

{

public static void main(String[] args) throws IOException

{

 

 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("ming.txt")));

 String data = null;

 while((data = br.readLine())!=null)

 {

 System.out.println(data); 

 }

 

 OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("hello2.txt"));

 osw.write(s,0,s.length());

 osw.flush();

 

 PrintWriter pw = new PrintWriter(new OutputStreamWriter(new FileOutputStream("hello3.txt")),true);

 pw.println(s);

 

 br.close();

 osw.close();

 pw.close();

} 

}