Java使用流读入字符,正确输出读入的字符.

使用流读入字符,正确输出读入的字符.

 

/** *//**
 * $Id:$
 *
 * Copyright 2005 easou, Inc. All Rights Reserved.
 */
package say;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;

/** *//**
 * 
 * @author sai
 * 
 */
public class TestFile ...{

    public static void main(String[] args) ...{
        TestFile tt = new TestFile();
        tt.testStreamBuffer();
        tt.testCharBuffer();
    }

    /** *//**
     * 读stream,不适合读双字节字符
     * 
     */
    public void testStreamBuffer() ...{
        BufferedOutputStream bo = new BufferedOutputStream(System.out);
        try ...{
            byte[] str = (new String("abcdefghijklmn")).getBytes();
            ByteArrayInputStream ba = new ByteArrayInputStream(str);

            // 可以读String
            BufferedInputStream br = new BufferedInputStream(ba);
            // 也可以读文件

            // BufferedInputStream br=new BufferedInputStream(new
            // FileInputStream("d:/hello.txt"));

            byte[] by = new byte[10];

            int num = 0;
            
            while ((num = br.read(by)) != -1) ...{

                System.out.write(by, 0, num);
                System.out.println();
            }
            bo.close();
        } catch (Exception io) ...{
            io.printStackTrace();
        }
        
    }

    /** *//**
     * 读字符,中文
     * 
     */
    public void testCharBuffer() ...{
        try ...{
            BufferedReader br = new BufferedReader(new StringReader(
                    "myNnameIs小白sai "));
            char[] by = new char[10];

            int num = 0;
            // StringWriter sw=new StringWriter();
            // 这里不知道怎么用StringWriter.输出到文件吧
            FileWriter sw = new FileWriter("d:/hello.txt");

            BufferedWriter bo = new BufferedWriter(sw);

            while ((num = br.read(by)) != -1) ...{
                bo.write(by, 0, num);
                bo.write(" ");
                bo.flush();

            }
            sw.close();
        } catch (Exception io) ...{
            io.printStackTrace();
        }
    }
}