2018.7.24 算法与编程----文件合并

编写一个程序，讲a.txt文件中的单词与b.txt文件中单词与b.txt文件中的单词交替合并到c.txt文件中， a.txt文件中的单词用回车符分割，b.txt文件中用回车或空格进行分隔

package praDemo;

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;

/**
 * 编写一个程序，讲a.txt文件中的单词与b.txt文件中单词教体结合并到c.txt文件中，
 * a.txt文件中的单词用回车符分割，b.txt文件中用回车或空格进行分隔
 * @author Administrator
 *
 */
public class AlgorithmDemo {
	public static void main(String[] args) throws Exception {
		FileManager a = new FileManager("F:\a.txt",new char[] {'
'});  //文件所在的路径
		FileManager b = new FileManager("F:\b.txt",new char[] {'
'});   //文件所在的路径
		FileWriter c = new FileWriter("F:\c.txt");
		String aWord  = null;
		String bWord = null;
		while((aWord = a.newxtWord())!=null){
			c.write(aWord+"
");
			bWord = b.newxtWord();
			
			if(bWord != null) {
				c.write(bWord+"
");
			}
			
			while((bWord = b.newxtWord())!=null) {
				c.write(bWord+"
");
			}
			c.close();
		}
		
	}
}

class FileManager{
	String[] words = null;
	int pos = 0;
	public FileManager(String filename,char[] sperators)throws Exception{
		File f = new File(filename);
		FileReader reader = new FileReader(f);
		char[] buf = new char[(int)f.length()];
		int len = reader.read(buf);
		String results = new String(buf,0,len);
		String regex = null;
		if(sperators.length >1) {
			regex = ""+sperators[0]+"|"+sperators[1];
		}else {
			regex = ""+sperators[0];
			
		}
		words = results.split(regex);
		
	}
	
	public String newxtWord() {
		if(pos == words.length) 
			return null;
		return words[pos++];
	}
	
}