/* * 序列流: * SequenceInputStream *
* 小程序：使用序列流合并文件内容 */
package com.michael.lin;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.Enumeration;
import java.util.Vector;
public class Demo01 {
public static void main(String[] args) throws IOException{
merge();
merge3();
}
//合并三个文件
public static void merge3() throws IOException{
//1.定位文件
File file1 = new File("c:\\a.txt");
File file2 = new File("c:\\buf.txt");
File file3 = new File("c:\\data.txt");
File outFile = new File("c:\\outFile.txt");
//2.构建文件输入输出通道
FileInputStream fileInputStream1 = new FileInputStream(file1);
FileInputStream fileInputStream2 = new FileInputStream(file2);
FileInputStream fileInputStream3 = new FileInputStream(file3);
FileOutputStream fileOutputStream = new FileOutputStream(outFile);
//3.将输入序列接入到序列流中
Vectorvector = new Vector();
vector.add(fileInputStream1);
vector.add(fileInputStream2);
vector.add(fileInputStream3);
Enumerationenumeration = vector.elements();
SequenceInputStream seqInputStrem = new SequenceInputStream(enumeration);
//4.读取序列流中的内容并输出
int length = 0;
byte[] buf = new byte[1024];
while((length=seqInputStrem.read(buf))!=-1){
fileOutputStream.write(buf,0,length);
}
//5.关闭资源
seqInputStrem.close();
fileOutputStream.close();
}
//使用序列流和SequenceInputStreanm合并两个文件
public static void merge() throws IOException{
//1.定位文件
File file1 = new File("c:\\buf.txt");
File file2 = new File("c:\\data.txt");
File outFile = new File("c:\\bufData.txt");
//2.构建输入输出通道
FileInputStream fileInputStrem1 = new FileInputStream(file1);
FileInputStream fileInputStram2 = new FileInputStream(file2);
FileOutputStream fileOutputStream = new FileOutputStream(outFile);
//3.将输入通道介入到序列流中
SequenceInputStream seqInputStream = new SequenceInputStream(fileInputStrem1,fileInputStram2);
//4.从序列流中读取数据放入输出流中
int length = 0;
byte[] buf = new byte[1024];
while((length=seqInputStream.read(buf))!=-1){
fileOutputStream.write(buf,0,length);
}
//5.关闭通道
seqInputStream.close();
fileOutputStream.close();
}
}