IO流：将a.txt,b.txt,c.txt文本中的内容存储至d.txt文本中（合并流）

￡神魔★判官ぃ 2021-09-20 10:28 350阅读 0赞

【需求】：将a.txt,b.txt,c.txt文本中的内容存储至d.txt文本中

a.txt

![20190624163520668.png][]

b.txt

![20190624163559213.png][]

c.txt

![2019062416362258.png][]

【图例】：将多个输入流存储至一个输出流中输出

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1RoZV9CZXN0X0hhY2tlcg_size_16_color_FFFFFF_t_70][]

【代码】：

import java.util.*;
    import java.io.*;
    class SequenceDemo{
        public static void main(String[] args){
            Vector<InputStream> v=new Vector<InputStream>();
            v.add(new InputStream("a.txt"));
            v.add(new InputStream("b.txt"));
            v.add(new InputStream("c.txt"));
            
            Enumeration en=v.elements();
            SequenceInputStream sis=new SequenceInputStream(en);
            FileOutputStream fos=new FileOutputStream("d.txt");
            byte[] by=new byte[1024];
            int len=0;
            while((len=sis.read())!=-1){
                fos.write(by,0,len);
            }
            fos.close();
            sis.close();
        }
    
    }

【结果截图】：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1RoZV9CZXN0X0hhY2tlcg_size_16_color_FFFFFF_t_70 1][]

[20190624163520668.png]: /images/20210811/11280286c7dc447283a4dae8254b06d7.png
[20190624163559213.png]: /images/20210811/71967c030f394331aad448e84c17f2df.png
[2019062416362258.png]: /images/20210811/c83eaaa78c8f491eaec31dd868611774.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1RoZV9CZXN0X0hhY2tlcg_size_16_color_FFFFFF_t_70]: /images/20210811/807556e729c74715b9acb32cb0381805.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1RoZV9CZXN0X0hhY2tlcg_size_16_color_FFFFFF_t_70 1]: /images/20210811/4490acd4a6584e69a5c5154df24c13fe.png