字节流转字符流

package test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;

public class Test {  
	  
    public static void main(String[] args) throws IOException {
    	outputStreamToWriter();
    	inputStreamToReader();
    }
    
    public static void outputStreamToWriter() throws IOException{
    	File f=new File("d:"+File.separator+"text.txt");
    	Writer writer=new OutputStreamWriter(new FileOutputStream(f));
    	writer.write("Hello World!");
    	writer.close();
    }
    
    /**输入： 字节流转字符流 
     * @throws IOException **/
    public static void inputStreamToReader() throws IOException{
    	File f=new File("d:"+File.separator+"text.txt");
    	Reader reader=new InputStreamReader(new FileInputStream(f));
    	char c[]=new char[1024];
    	int len=reader.read(c);
    	reader.close();
    	System.out.println(new String(c,0,len));
    }
    
    
    /**
     * 输出
		Hello World!
     */
}
package test;

import java.io.File;
impor