Java IO--字节-字符流转换OutputStreamWriter/InputStreamReader

OutputStreamWriter和InputStreamReader

import java.io.* ;
public class OutputStreamWriterDemo01{
	public static void main(String args[]) throws Exception	{	// 所有异常抛出
		File f = new File("d:" + File.separator + "test.txt") ;	
		Writer out = null ;	// 字符输出流
		out = new OutputStreamWriter(new FileOutputStream(f)) ;	// 字节流变为字符流
		out.write("hello world!!") ;	// 使用字符流输出
		out.close() ;
	}
};

import java.io.* ;
public class InputStreamReaderDemo01{
	public static void main(String args[]) throws Exception{
		File f = new File("d:" + File.separator + "test.txt") ;	
		Reader reader = null ;
		reader = new InputStreamReader(new FileInputStream(f)) ;	// 将字节流变为字符流
		char c[] = new char[1024] ;
		int len = reader.read(c) ;	// 读取
		reader.close() ;	// 关闭
		System.out.println(new String(c,0,len)) ;
	}
};