import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Test {

    public static void main(String[] args) {
        File src = new File("f:/1.txt");
        File dist = new File("f:/1_.txt");
        transpose(src, dist, " ");        
    }

    /**
     * 原文件内容：
      * 1.1 1.2 1.3 1.4 1.5 
     * 2.1 2.2 2.3 2.4 2.5
     * 3.1 3.2 3.3 3.4 3.5
     * 4.1 4.2 4.3 4.4 4.5
     * 5.1 5.2 5.3 5.4 5.5
     * 6.1 6.2 6.3 6.4 6.5
     * 转置后：
      * 1.1 2.1 3.1 4.1 5.1 6.1
     * 1.2 2.2 3.2 4.2 5.2 6.2
     * 1.3 2.3 3.3 4.3 5.3 6.3
     * 1.4 2.4 3.4 4.4 5.4 6.4
     * 1.5 2.5 3.5 4.5 5.5 6.5
     * @param src 源文件
      * @param dist 新文件
      * @param separator 列分隔符
      * @since 2008-1-21
     */
    private static void transpose(File src, File dist, String separator) {
        BufferedReader br = null;
        BufferedWriter bw = null;
        int row = 0;
        try {
            // 检查矩阵的行数
              br = new BufferedReader(new FileReader(src));
            String str;            
            while((str = br.readLine()) != null) {
                row++;
            }
            br.close();
            
            // 读成取矩阵文件
              br = new BufferedReader(new FileReader(src));            
            String[][] matrix = new String[row][];
            row = 0;
            while((str = br.readLine()) != null) {
                matrix[row++] = str.split(separator); 
            }
            br.close();
            
            // 重新写入文件
              bw = new BufferedWriter(new FileWriter(dist));
            for(int j = 0; j < matrix[0].length; j++) {
                for(int i = 0; i < matrix.length; i++) {
                    if(i > 0) {
                        // 写入分隔符
                        bw.write(separator);
                    }
                    bw.write(matrix[i][j]);
                }
                bw.newLine();
            }
            bw.close();            
        }catch(IOException e) {
            e.printStackTrace();
        }
    }
}