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[] {'\n'});  //文件所在的路径
        FileManager b = new FileManager("F:\\b.txt",new char[] {'\n'});   //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+"\n");
            bWord = b.newxtWord();
            
            if(bWord != null) {
                c.write(bWord+"\n");
            }
            
            while((bWord = b.newxtWord())!=null) {
                c.write(bWord+"\n");
            }
            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++];
    }
    
}