PushBackInputStream回退流

【例子1】


import java.io.ByteArrayInputStream;  
import java.io.IOException;   
import java.io.PushbackInputStream;  


/**  
 * 回退流操作  
 */  

public class PushBackInputStreamDemo{

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

        String str = "hello,rollenholt";

        PushbackInputStream push = null;

        ByteArrayInputStream bat = null;

        bat = new ByteArrayInputStream(str.getBytes());

        push = new PushbackInputStream(bat);

        int temp = 0;

        while((temp = push.read()) != -1){

            if(temp == ‘,’){

                push.unread(temp);

                temp = push.read();

                System.out.print("(回退" + (char) temp + ") ");

            }else{

                System.out.print((char) temp);

            }

        }

    }

}

【运行结果】:

hello(回退,) rollenholt

【例子2】


/**  
 * 取得本地的默认编码  
 */  

public class CharSetDemo{

    public static void main(String[] args){

        System.out.println("系统默认编码为:" + System.getProperty("file.encoding"));

    }

}

【运行结果】:

系统默认编码为:GBK

【例子3】乱码的产生:


import java.io.File;   
import java.io.FileOutputStream;    
import java.io.IOException;   
import java.io.OutputStream;   



/**  
 * 乱码的产生  
 */   

public class CharSetDemo2{

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

        File file = new File("d:" + File.separator + "hello.txt");

        OutputStream out = new FileOutputStream(file);

        byte[] bytes = "你好".getBytes("ISO8859-1");

        out.write(bytes);

        out.close();

    }

}

【运行结果】:

??

一般情况下产生乱码,都是由于编码不一致的问题。

posted @ 2018-10-01 00:59  尐鱼儿  阅读(588)  评论(0编辑  收藏  举报