import java.io.FileOutputStream;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Random;

public class maziness {

private int M;//行数

private int N;//列数

private int[] visitMatrix;//搜索是判断是否曾被访问过

private int[][] colMatrix;//保存要输出的的'|'矩阵

private int[][] rowMatrix;//保存要输出的的'_'矩阵

private Random random;//用来生成随机数，保证迷宫的复杂程度

public maziness(int M ,int N){

this.M=M;

this.N=N;

visitMatrix=new int[M*N];

colMatrix = new int[M][N+1];

rowMatrix = new int[M+1][N];

init(colMatrix,M,N+1);

init(rowMatrix,M+1,N);

for (int i=0;i

visitMatrix[i]=0;

random = new Random();

}

private void init(int matrix[][],int M ,int N){

for (int i=0;i

for (int j=0;j

matrix[i][j]=1;

}

//返回num周围可用的邻居，即没被访问过，也没到达边缘

private void availableNeigbers(ArrayList list,int num){

int allNeigber[]=new int[4];

if (num%N==1){

allNeigber[0]=num-N;

allNeigber[1]=num+N;

allNeigber[2]=num+1;

allNeigber[3]=-1;

}

else if (num%N==0){

allNeigber[0]=num-N;

allNeigber[1]=num+N;

allNeigber[2]=num-1;

allNeigber[3]=-1;

}

else{

allNeigber[0]=num-N;

allNeigber[1]=num+N;

allNeigber[2]=num-1;

allNeigber[3]=num+1;

}

for (int i=0;i<4;i++){

if (allNeigber[i]>0 & allNeigber[i]<=M*N)

if (visitMatrix[allNeigber[i]-1]==0 )

list.add(allNeigber[i]);

}

}

//返回随机选出的可用邻居

private int neigber(int num){

ArrayList list=new ArrayList();

availableNeigbers(list,num);

if (list.isEmpty())

return -1;

else{

return (Integer) list.get(random.nextInt(list.size()));

}

}

//移除num1和num2之间的墙

private void removeWall(int num1,int num2){

int x1=(num1+N-1)/N-1;

int y1=(num1-1)%N;

if (Math.abs(num1-num2)==1){

if (num1>num2)

colMatrix[x1][y1]=0;

else

colMatrix[x1][y1+1]=0;

}

else {

if (num1>num2)

rowMatrix[x1-1][y1]=0;

else

rowMatrix[x1][y1]=0;

}

}

//生成迷宫

public void process(){

ArrayList list=new ArrayList();

int curr=(M*N)/2;

visitMatrix[curr-1]=1;

list.add(curr);

int tmp;

while (!list.isEmpty()){

tmp=neigber(curr);

if (tmp>0){

visitMatrix[tmp-1]=1;

removeWall(curr,tmp);

curr=tmp;

list.add(curr);

}

else

curr=(Integer) list.remove(list.size()-1);

}

}

//绘制迷宫，并输出到txt文件中

public void draw(FileOutputStream fos){

try {

fos.write(' ');

fos.write(' ');

for (int i=0;i

fos.write(' ');

fos.write('_');

}

fos.write('\r');

for (int i=0;i

int j;

for (j=0;j

if (colMatrix[i][j]==1)

fos.write('|');

else

fos.write(' ');

if (rowMatrix[i][j]==1)

fos.write('_');

else

fos.write(' ');

}

if (i!=M-1 || j!=N){

fos.write('|');

fos.write('\r');

}

}

fos.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

try {

FileOutputStream fos=new FileOutputStream("F://maze.txt");

maziness m=new maziness(30,60);

m.process();

m.draw(fos);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println(e);

}

}

}