io流合并

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.SequenceInputStream;


public class SequenceDemo {
public static void main(String[] args){


File file1 = new File("c:\\3.txt");       
File file2 = new File("c:\\1.txt");
File file3 = new File("c:\\2.txt");

// 声明字节输入流
InputStream input1 = null;                                // 声明字节输入流
InputStream input2 = null;

try {

input1 = new FileInputStream(file1);
input2 = new FileInputStream(file2);       
}
catch (FileNotFoundException e){

System.out.println("源文件不存在！");

}
SequenceInputStream sinput = null;  // 声明合并流
sinput = new SequenceInputStream(input1, input2);// 实例化合并流

      
OutputStream output = null; // 声明字节输出流
try{
output = new FileOutputStream(file3);// 实例化字节输出流
}
catch (FileNotFoundException e){
System.out.println("操作文件不存在！");

}
int temp = 0;
try{
   while ((temp = sinput.read()) != -1) {// 未读完
   output.write(temp);  // 保存数据

   }
}catch (IOException e){
e.printStackTrace();
}
      try{
      sinput.close();
      output.close();
      input1.close();
      input2.close();                               
     
      }catch (IOException e){
      e.printStackTrace();
      }
      System.out.println("数据合并操作完成！");
}

}