八皇后问题 --- 递归解法 --- java代码

八皇后问题是一个以国际象棋为背景的问题：如何能够在 8×8 的国际象棋棋盘上放置八个皇后，使得任何一个皇后都无法直接吃掉其他的皇后？为了达到此目的，任两个皇后都不能处于同一条横行、纵行或斜线上。八皇后问题可以推广为更一般的n皇后摆放问题：这时棋盘的大小变为n×n，而皇后个数也变成n。当且仅当 n = 1 或 n ≥ 4 时问题有解[1]。
以上内容摘自维基百科：http://zh.wikipedia.org/wiki/%E5%85%AB%E7%9A%87%E5%90%8E%E9%97%AE%E9%A2%98

代码如下：

public class Demo {

    public static void main(String[] args) {
        nextRowPlace(START_ROW);
    }

    private static final int ROW = 8, COL = 8, START_ROW = 0, START_COL = 0;
    private static boolean[][] board = new boolean[8][8];

    private static void nextRowPlace(final int row) {
        if(row == ROW){
            print();
            return;
        }
        for(int j=START_COL; j!=COL; ++j)
            if(checkPosValid(row, j)){
                board[row][j] = true;
                nextRowPlace(row+1);
                board[row][j] = false;
            }
        return;
    }

    private static boolean checkPosValid(final int row, final int col) {
        for(int i=START_ROW; i!=ROW; ++i)
            if(board[i][col])
                return false;
        for(int i=row, j=col; i!=START_ROW-1 && j!=START_COL-1; --i, --j)
            if(board[i][j])
                return false;
        for(int i=row, j=col; i!=START_ROW-1 && j!= COL; --i, ++j)
            if(board[i][j])
                return false;
        return true;
    }

    private static int count = 0;
    private static void print() {
        System.out.println("--- --- --- --- --- " + ++count +" --- ---");
        for(int i=START_ROW; i!=ROW; ++i){
            for(int j=START_COL; j!=COL; ++j)
                System.out.print(board[i][j] ? "O " : "X ");
            System.out.println();
        }
        System.out.println();
        return;
    }

}

运行结果如下：

--- --- --- --- --- 1 --- ---
O X X X X X X X
X X X X O X X X
X X X X X X X O
X X X X X O X X
X X O X X X X X
X X X X X X O X
X O X X X X X X
X X X O X X X X 

--- --- --- --- --- 2 --- ---
O X X X X X X X
X X X X X O X X
X X X X X X X O
X X O X X X X X
X X X X X X O X
X X X O X X X X
X O X X X X X X
X X X X O X X X 

--- --- --- --- --- 3 --- ---
O X X X X X X X
X X X X X X O X
X X X O X X X X
X X X X X O X X
X X X X X X X O
X O X X X X X X
X X X X O X X X
X X O X X X X X 

--- --- --- --- --- 4 --- ---
O X X X X X X X
X X X X X X O X
X X X X O X X X
X X X X X X X O
X O X X X X X X
X X X O X X X X
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 5 --- ---
X O X X X X X X
X X X O X X X X
X X X X X O X X
X X X X X X X O
X X O X X X X X
O X X X X X X X
X X X X X X O X
X X X X O X X X 

--- --- --- --- --- 6 --- ---
X O X X X X X X
X X X X O X X X
X X X X X X O X
O X X X X X X X
X X O X X X X X
X X X X X X X O
X X X X X O X X
X X X O X X X X 

--- --- --- --- --- 7 --- ---
X O X X X X X X
X X X X O X X X
X X X X X X O X
X X X O X X X X
O X X X X X X X
X X X X X X X O
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 8 --- ---
X O X X X X X X
X X X X X O X X
O X X X X X X X
X X X X X X O X
X X X O X X X X
X X X X X X X O
X X O X X X X X
X X X X O X X X 

--- --- --- --- --- 9 --- ---
X O X X X X X X
X X X X X O X X
X X X X X X X O
X X O X X X X X
O X X X X X X X
X X X O X X X X
X X X X X X O X
X X X X O X X X 

--- --- --- --- --- 10 --- ---
X O X X X X X X
X X X X X X O X
X X O X X X X X
X X X X X O X X
X X X X X X X O
X X X X O X X X
O X X X X X X X
X X X O X X X X 

--- --- --- --- --- 11 --- ---
X O X X X X X X
X X X X X X O X
X X X X O X X X
X X X X X X X O
O X X X X X X X
X X X O X X X X
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 12 --- ---
X O X X X X X X
X X X X X X X O
X X X X X O X X
O X X X X X X X
X X O X X X X X
X X X X O X X X
X X X X X X O X
X X X O X X X X 

--- --- --- --- --- 13 --- ---
X X O X X X X X
O X X X X X X X
X X X X X X O X
X X X X O X X X
X X X X X X X O
X O X X X X X X
X X X O X X X X
X X X X X O X X 

--- --- --- --- --- 14 --- ---
X X O X X X X X
X X X X O X X X
X O X X X X X X
X X X X X X X O
O X X X X X X X
X X X X X X O X
X X X O X X X X
X X X X X O X X 

--- --- --- --- --- 15 --- ---
X X O X X X X X
X X X X O X X X
X O X X X X X X
X X X X X X X O
X X X X X O X X
X X X O X X X X
X X X X X X O X
O X X X X X X X 

--- --- --- --- --- 16 --- ---
X X O X X X X X
X X X X O X X X
X X X X X X O X
O X X X X X X X
X X X O X X X X
X O X X X X X X
X X X X X X X O
X X X X X O X X 

--- --- --- --- --- 17 --- ---
X X O X X X X X
X X X X O X X X
X X X X X X X O
X X X O X X X X
O X X X X X X X
X X X X X X O X
X O X X X X X X
X X X X X O X X 

--- --- --- --- --- 18 --- ---
X X O X X X X X
X X X X X O X X
X O X X X X X X
X X X X O X X X
X X X X X X X O
O X X X X X X X
X X X X X X O X
X X X O X X X X 

--- --- --- --- --- 19 --- ---
X X O X X X X X
X X X X X O X X
X O X X X X X X
X X X X X X O X
O X X X X X X X
X X X O X X X X
X X X X X X X O
X X X X O X X X 

--- --- --- --- --- 20 --- ---
X X O X X X X X
X X X X X O X X
X O X X X X X X
X X X X X X O X
X X X X O X X X
O X X X X X X X
X X X X X X X O
X X X O X X X X 

--- --- --- --- --- 21 --- ---
X X O X X X X X
X X X X X O X X
X X X O X X X X
O X X X X X X X
X X X X X X X O
X X X X O X X X
X X X X X X O X
X O X X X X X X 

--- --- --- --- --- 22 --- ---
X X O X X X X X
X X X X X O X X
X X X O X X X X
X O X X X X X X
X X X X X X X O
X X X X O X X X
X X X X X X O X
O X X X X X X X 

--- --- --- --- --- 23 --- ---
X X O X X X X X
X X X X X O X X
X X X X X X X O
O X X X X X X X
X X X O X X X X
X X X X X X O X
X X X X O X X X
X O X X X X X X 

--- --- --- --- --- 24 --- ---
X X O X X X X X
X X X X X O X X
X X X X X X X O
O X X X X X X X
X X X X O X X X
X X X X X X O X
X O X X X X X X
X X X O X X X X 

--- --- --- --- --- 25 --- ---
X X O X X X X X
X X X X X O X X
X X X X X X X O
X O X X X X X X
X X X O X X X X
O X X X X X X X
X X X X X X O X
X X X X O X X X 

--- --- --- --- --- 26 --- ---
X X O X X X X X
X X X X X X O X
X O X X X X X X
X X X X X X X O
X X X X O X X X
O X X X X X X X
X X X O X X X X
X X X X X O X X 

--- --- --- --- --- 27 --- ---
X X O X X X X X
X X X X X X O X
X O X X X X X X
X X X X X X X O
X X X X X O X X
X X X O X X X X
O X X X X X X X
X X X X O X X X 

--- --- --- --- --- 28 --- ---
X X O X X X X X
X X X X X X X O
X X X O X X X X
X X X X X X O X
O X X X X X X X
X X X X X O X X
X O X X X X X X
X X X X O X X X 

--- --- --- --- --- 29 --- ---
X X X O X X X X
O X X X X X X X
X X X X O X X X
X X X X X X X O
X O X X X X X X
X X X X X X O X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 30 --- ---
X X X O X X X X
O X X X X X X X
X X X X O X X X
X X X X X X X O
X X X X X O X X
X X O X X X X X
X X X X X X O X
X O X X X X X X 

--- --- --- --- --- 31 --- ---
X X X O X X X X
X O X X X X X X
X X X X O X X X
X X X X X X X O
X X X X X O X X
O X X X X X X X
X X O X X X X X
X X X X X X O X 

--- --- --- --- --- 32 --- ---
X X X O X X X X
X O X X X X X X
X X X X X X O X
X X O X X X X X
X X X X X O X X
X X X X X X X O
O X X X X X X X
X X X X O X X X 

--- --- --- --- --- 33 --- ---
X X X O X X X X
X O X X X X X X
X X X X X X O X
X X O X X X X X
X X X X X O X X
X X X X X X X O
X X X X O X X X
O X X X X X X X 

--- --- --- --- --- 34 --- ---
X X X O X X X X
X O X X X X X X
X X X X X X O X
X X X X O X X X
O X X X X X X X
X X X X X X X O
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 35 --- ---
X X X O X X X X
X O X X X X X X
X X X X X X X O
X X X X O X X X
X X X X X X O X
O X X X X X X X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 36 --- ---
X X X O X X X X
X O X X X X X X
X X X X X X X O
X X X X X O X X
O X X X X X X X
X X O X X X X X
X X X X O X X X
X X X X X X O X 

--- --- --- --- --- 37 --- ---
X X X O X X X X
X X X X X O X X
O X X X X X X X
X X X X O X X X
X O X X X X X X
X X X X X X X O
X X O X X X X X
X X X X X X O X 

--- --- --- --- --- 38 --- ---
X X X O X X X X
X X X X X O X X
X X X X X X X O
X O X X X X X X
X X X X X X O X
O X X X X X X X
X X O X X X X X
X X X X O X X X 

--- --- --- --- --- 39 --- ---
X X X O X X X X
X X X X X O X X
X X X X X X X O
X X O X X X X X
O X X X X X X X
X X X X X X O X
X X X X O X X X
X O X X X X X X 

--- --- --- --- --- 40 --- ---
X X X O X X X X
X X X X X X O X
O X X X X X X X
X X X X X X X O
X X X X O X X X
X O X X X X X X
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 41 --- ---
X X X O X X X X
X X X X X X O X
X X O X X X X X
X X X X X X X O
X O X X X X X X
X X X X O X X X
O X X X X X X X
X X X X X O X X 

--- --- --- --- --- 42 --- ---
X X X O X X X X
X X X X X X O X
X X X X O X X X
X O X X X X X X
X X X X X O X X
O X X X X X X X
X X O X X X X X
X X X X X X X O 

--- --- --- --- --- 43 --- ---
X X X O X X X X
X X X X X X O X
X X X X O X X X
X X O X X X X X
O X X X X X X X
X X X X X O X X
X X X X X X X O
X O X X X X X X 

--- --- --- --- --- 44 --- ---
X X X O X X X X
X X X X X X X O
O X X X X X X X
X X O X X X X X
X X X X X O X X
X O X X X X X X
X X X X X X O X
X X X X O X X X 

--- --- --- --- --- 45 --- ---
X X X O X X X X
X X X X X X X O
O X X X X X X X
X X X X O X X X
X X X X X X O X
X O X X X X X X
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 46 --- ---
X X X O X X X X
X X X X X X X O
X X X X O X X X
X X O X X X X X
O X X X X X X X
X X X X X X O X
X O X X X X X X
X X X X X O X X 

--- --- --- --- --- 47 --- ---
X X X X O X X X
O X X X X X X X
X X X O X X X X
X X X X X O X X
X X X X X X X O
X O X X X X X X
X X X X X X O X
X X O X X X X X 

--- --- --- --- --- 48 --- ---
X X X X O X X X
O X X X X X X X
X X X X X X X O
X X X O X X X X
X O X X X X X X
X X X X X X O X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 49 --- ---
X X X X O X X X
O X X X X X X X
X X X X X X X O
X X X X X O X X
X X O X X X X X
X X X X X X O X
X O X X X X X X
X X X O X X X X 

--- --- --- --- --- 50 --- ---
X X X X O X X X
X O X X X X X X
X X X O X X X X
X X X X X O X X
X X X X X X X O
X X O X X X X X
O X X X X X X X
X X X X X X O X 

--- --- --- --- --- 51 --- ---
X X X X O X X X
X O X X X X X X
X X X O X X X X
X X X X X X O X
X X O X X X X X
X X X X X X X O
X X X X X O X X
O X X X X X X X 

--- --- --- --- --- 52 --- ---
X X X X O X X X
X O X X X X X X
X X X X X O X X
O X X X X X X X
X X X X X X O X
X X X O X X X X
X X X X X X X O
X X O X X X X X 

--- --- --- --- --- 53 --- ---
X X X X O X X X
X O X X X X X X
X X X X X X X O
O X X X X X X X
X X X O X X X X
X X X X X X O X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 54 --- ---
X X X X O X X X
X X O X X X X X
O X X X X X X X
X X X X X O X X
X X X X X X X O
X O X X X X X X
X X X O X X X X
X X X X X X O X 

--- --- --- --- --- 55 --- ---
X X X X O X X X
X X O X X X X X
O X X X X X X X
X X X X X X O X
X O X X X X X X
X X X X X X X O
X X X X X O X X
X X X O X X X X 

--- --- --- --- --- 56 --- ---
X X X X O X X X
X X O X X X X X
X X X X X X X O
X X X O X X X X
X X X X X X O X
O X X X X X X X
X X X X X O X X
X O X X X X X X 

--- --- --- --- --- 57 --- ---
X X X X O X X X
X X X X X X O X
O X X X X X X X
X X O X X X X X
X X X X X X X O
X X X X X O X X
X X X O X X X X
X O X X X X X X 

--- --- --- --- --- 58 --- ---
X X X X O X X X
X X X X X X O X
O X X X X X X X
X X X O X X X X
X O X X X X X X
X X X X X X X O
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 59 --- ---
X X X X O X X X
X X X X X X O X
X O X X X X X X
X X X O X X X X
X X X X X X X O
O X X X X X X X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 60 --- ---
X X X X O X X X
X X X X X X O X
X O X X X X X X
X X X X X O X X
X X O X X X X X
O X X X X X X X
X X X O X X X X
X X X X X X X O 

--- --- --- --- --- 61 --- ---
X X X X O X X X
X X X X X X O X
X O X X X X X X
X X X X X O X X
X X O X X X X X
O X X X X X X X
X X X X X X X O
X X X O X X X X 

--- --- --- --- --- 62 --- ---
X X X X O X X X
X X X X X X O X
X X X O X X X X
O X X X X X X X
X X O X X X X X
X X X X X X X O
X X X X X O X X
X O X X X X X X 

--- --- --- --- --- 63 --- ---
X X X X O X X X
X X X X X X X O
X X X O X X X X
O X X X X X X X
X X O X X X X X
X X X X X O X X
X O X X X X X X
X X X X X X O X 

--- --- --- --- --- 64 --- ---
X X X X O X X X
X X X X X X X O
X X X O X X X X
O X X X X X X X
X X X X X X O X
X O X X X X X X
X X X X X O X X
X X O X X X X X 

--- --- --- --- --- 65 --- ---
X X X X X O X X
O X X X X X X X
X X X X O X X X
X O X X X X X X
X X X X X X X O
X X O X X X X X
X X X X X X O X
X X X O X X X X 

--- --- --- --- --- 66 --- ---
X X X X X O X X
X O X X X X X X
X X X X X X O X
O X X X X X X X
X X O X X X X X
X X X X O X X X
X X X X X X X O
X X X O X X X X 

--- --- --- --- --- 67 --- ---
X X X X X O X X
X O X X X X X X
X X X X X X O X
O X X X X X X X
X X X O X X X X
X X X X X X X O
X X X X O X X X
X X O X X X X X 

--- --- --- --- --- 68 --- ---
X X X X X O X X
X X O X X X X X
O X X X X X X X
X X X X X X O X
X X X X O X X X
X X X X X X X O
X O X X X X X X
X X X O X X X X 

--- --- --- --- --- 69 --- ---
X X X X X O X X
X X O X X X X X
O X X X X X X X
X X X X X X X O
X X X O X X X X
X O X X X X X X
X X X X X X O X
X X X X O X X X 

--- --- --- --- --- 70 --- ---
X X X X X O X X
X X O X X X X X
O X X X X X X X
X X X X X X X O
X X X X O X X X
X O X X X X X X
X X X O X X X X
X X X X X X O X 

--- --- --- --- --- 71 --- ---
X X X X X O X X
X X O X X X X X
X X X X O X X X
X X X X X X O X
O X X X X X X X
X X X O X X X X
X O X X X X X X
X X X X X X X O 

--- --- --- --- --- 72 --- ---
X X X X X O X X
X X O X X X X X
X X X X O X X X
X X X X X X X O
O X X X X X X X
X X X O X X X X
X O X X X X X X
X X X X X X O X 

--- --- --- --- --- 73 --- ---
X X X X X O X X
X X O X X X X X
X X X X X X O X
X O X X X X X X
X X X O X X X X
X X X X X X X O
O X X X X X X X
X X X X O X X X 

--- --- --- --- --- 74 --- ---
X X X X X O X X
X X O X X X X X
X X X X X X O X
X O X X X X X X
X X X X X X X O
X X X X O X X X
O X X X X X X X
X X X O X X X X 

--- --- --- --- --- 75 --- ---
X X X X X O X X
X X O X X X X X
X X X X X X O X
X X X O X X X X
O X X X X X X X
X X X X X X X O
X O X X X X X X
X X X X O X X X 

--- --- --- --- --- 76 --- ---
X X X X X O X X
X X X O X X X X
O X X X X X X X
X X X X O X X X
X X X X X X X O
X O X X X X X X
X X X X X X O X
X X O X X X X X 

--- --- --- --- --- 77 --- ---
X X X X X O X X
X X X O X X X X
X O X X X X X X
X X X X X X X O
X X X X O X X X
X X X X X X O X
O X X X X X X X
X X O X X X X X 

--- --- --- --- --- 78 --- ---
X X X X X O X X
X X X O X X X X
X X X X X X O X
O X X X X X X X
X X O X X X X X
X X X X O X X X
X O X X X X X X
X X X X X X X O 

--- --- --- --- --- 79 --- ---
X X X X X O X X
X X X O X X X X
X X X X X X O X
O X X X X X X X
X X X X X X X O
X O X X X X X X
X X X X O X X X
X X O X X X X X 

--- --- --- --- --- 80 --- ---
X X X X X O X X
X X X X X X X O
X O X X X X X X
X X X O X X X X
O X X X X X X X
X X X X X X O X
X X X X O X X X
X X O X X X X X 

--- --- --- --- --- 81 --- ---
X X X X X X O X
O X X X X X X X
X X O X X X X X
X X X X X X X O
X X X X X O X X
X X X O X X X X
X O X X X X X X
X X X X O X X X 

--- --- --- --- --- 82 --- ---
X X X X X X O X
X O X X X X X X
X X X O X X X X
O X X X X X X X
X X X X X X X O
X X X X O X X X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 83 --- ---
X X X X X X O X
X O X X X X X X
X X X X X O X X
X X O X X X X X
O X X X X X X X
X X X O X X X X
X X X X X X X O
X X X X O X X X 

--- --- --- --- --- 84 --- ---
X X X X X X O X
X X O X X X X X
O X X X X X X X
X X X X X O X X
X X X X X X X O
X X X X O X X X
X O X X X X X X
X X X O X X X X 

--- --- --- --- --- 85 --- ---
X X X X X X O X
X X O X X X X X
X X X X X X X O
X O X X X X X X
X X X X O X X X
O X X X X X X X
X X X X X O X X
X X X O X X X X 

--- --- --- --- --- 86 --- ---
X X X X X X O X
X X X O X X X X
X O X X X X X X
X X X X O X X X
X X X X X X X O
O X X X X X X X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 87 --- ---
X X X X X X O X
X X X O X X X X
X O X X X X X X
X X X X X X X O
X X X X X O X X
O X X X X X X X
X X O X X X X X
X X X X O X X X 

--- --- --- --- --- 88 --- ---
X X X X X X O X
X X X X O X X X
X X O X X X X X
O X X X X X X X
X X X X X O X X
X X X X X X X O
X O X X X X X X
X X X O X X X X 

--- --- --- --- --- 89 --- ---
X X X X X X X O
X O X X X X X X
X X X O X X X X
O X X X X X X X
X X X X X X O X
X X X X O X X X
X X O X X X X X
X X X X X O X X 

--- --- --- --- --- 90 --- ---
X X X X X X X O
X O X X X X X X
X X X X O X X X
X X O X X X X X
O X X X X X X X
X X X X X X O X
X X X O X X X X
X X X X X O X X 

--- --- --- --- --- 91 --- ---
X X X X X X X O
X X O X X X X X
O X X X X X X X
X X X X X O X X
X O X X X X X X
X X X X O X X X
X X X X X X O X
X X X O X X X X 

--- --- --- --- --- 92 --- ---
X X X X X X X O
X X X O X X X X
O X X X X X X X
X X O X X X X X
X X X X X O X X
X O X X X X X X
X X X X X X O X
X X X X O X X X

2014-04-12

八皇后问题 --- 递归解法 --- java代码的更多相关文章

比赛组队问题 --- 递归解法 --- java代码 --- 八皇后问题
两队比赛,甲队为A.B.C3人,乙队为X.Y.Z3人.已知A不和X比,C不和X.Z比,请编程序找出3队赛手名单采用了与八皇后问题相似的解法,代码如下: 如有疑问请链接八皇后问题的解法:http:// ...
骑士周游问题 --- 递归解法 --- java代码
骑士游历: 定义了向量的数组M,行数组X,列数组Y, 棋盘plane,计数器count,走动步数step 需要注意的是,递归函数的进入前的验证,原先的想法是传入来时的方向参数,可是这样的想法被实践否定 ...
java实现八皇后问题(递归和循环两种方式)
循环方式: package EightQueens; public class EightQueensNotRecursive { private static final boolean AVA ...
八皇后问题递归实现 C语言超详细思路基础
八皇后问题 :假设將八个皇后放到国际象棋盘上,使其两两之间无法相互攻击.共有几种摆法? 基础知识: 国际象棋里,棋盘为8X8格. 皇后每步可以沿直线.斜线走任意格. 思路: 1.想把8个皇后放进去 ...
八皇后非递归（仅使用一个数组且可扩展为N皇后问题）
</pre><pre name="code" class="cpp">/* Theme:八皇后(非递归) Coder:秒针的声音 Tim ...
[LeetCode系列]N皇后问题递归解法 -- 位操作方式
N皇后问题: 给定8*8棋盘, 放置n个皇后, 使其互相不能攻击(即2个皇后不能放在同一行/列/正反对角线上), 求解共有多少种放置方式? 这个问题的解答网上有不少, 但是位操作解法的我看到的不多. ...
K皇后问题递归解法
#include<iostream> #include<cmath> #include<ctime> using namespace std; bool che ...
java递归求八皇后问题解法
八皇后问题八皇后问题,是一个古老而著名的问题,是回溯算法的典型案例.该问题是国际西洋棋棋手马克斯·贝瑟尔于1848年提出:在8×8格的国际象棋上摆放八个皇后,使其不能互相攻击,即任意两个皇后都不能处 ...
对八皇后的补充以及自己解决2n皇后问题代码
有了上次的八皇后的基础.这次准备解决2n皇后的问题,: //问题描述// 给定一个n*n的棋盘,棋盘中有一些位置不能放皇后.现在要向棋盘中放入n个黑皇后和n个白皇后,使任意的两个黑皇后都不在同一行./ ...

随机推荐

MyBatis学习总结_19_Mybatis传多个参数（三种解决方案）
据我目前接触到的传多个参数的方案有三种. 第一种方案 DAO层的函数方法 Public User selectUser(String name,String area); 对应的Mapper.xm ...
CentOS 加载/挂载 U盘
1.以root用户登陆先加载USB模块 modprobe usb-storage 用fdisk -l 看看U盘的设备假如U盘是sda1 2.确定在目录 /mnt 下建立了文件夹 ...
C++：异常的处理
6.4 异常处理程序中常见的错误分为两大类:编译时期的错误和运行时期的错误. 编译时期的错误比较简单容易发现:主要是语法错误,如关键字拼写错误.缺分号.括号不匹配等运行时期的错误比较难发现,甚至是 ...
linux poll
man poll: NAME poll, ppoll - wait for some event on a file descriptor SYNOPSIS #include <poll.h&g ...
angular todo
<!DOCTYPE HTML> <html lang="en-US" ng-app> <head> <meta charset=" ...
Spring事务的来龙去脉
引言 Spring是一个IOC框架,在IOC框架的基础上,提供了DAO集成,AOP事务控制,JNDI等等一系列的高级功能,个人觉得,在Spring中最值得称道的不仅仅它是一个非入侵的IOC容器,而在于 ...
vc 6.0 连接数据库
在mysql的文档(C:\Program Files\MySQL\MySQL Server 5.5\lib)里面找到libmysql.dll和libmysql.lib 两个文件,将他们移到工程文件下 ...
Android内存管理（5）*官方教程：Logcat内存日志各字段含义，查看当前内存快照，跟踪记录内存分配，用adb查看内存情况时各行列的含义，捕获内存快照的3种方法，如何让程序暴漏内存泄漏的方法
Investigating Your RAM Usage In this document Interpreting Log Messages 内存分析日志中各消息的含 ...
BroadcastService的测试用例
程序运行起来之后,需要用多个telnet客户端来进行测试连接的命令为conn deviceNumber 广播命令为broa message 需要注意的是:示例代码有bug, broadcastDic ...
java日期格式的转换
1.转换指定格式的日期 /** * 日期格式转换 * @throws ParseException */ public String dateformat(String date,String tab ...

八皇后问题 --- 递归解法 --- java代码

八皇后问题 --- 递归解法 --- java代码的更多相关文章

随机推荐

热门专题