谷歌地图瓦片转百度地图瓦片

package com.ly.baidu.tools;

import java.io.File;

public class GoogleToBaidu {
    static int[] baiduX = { 0, 0, 1, 3, 6, 12, 24, 49, 98, 197, 395, 790, 1581,
            3163, 6327, 12654, 25308, 50617 };
    static int[] baiduY = { 0, 0, 0, 1, 2, 4, 9, 18, 36, 73, 147, 294, 589,
            1178, 2356, 4712, 9425, 18851 };
    static int[] googleX = { 0, 1, 3, 7, 13, 26, 52, 106, 212, 425, 851, 1702,
            3405, 6811, 13623, 27246, 54492, 107917 };
    static int[] googleY = { 0, 0, 1, 2, 5, 12, 23, 47, 95, 190, 380, 761,
            1522, 3045, 6091, 12183, 24366, 47261 };

    public static void main(String[] args) {
        for (int zoom = 1; zoom < 18; zoom++) {
            //底片瓦片转换
            File dir = new File("satellite"+File.separator + (zoom - 1));
            execute(dir,zoom);
            //路段层瓦片转换
            File dir2 = new File("overlay"+File.separator + (zoom - 1));
            execute(dir2,zoom);
            System.out.println("current execute zoom:"+zoom);
        }
    }

    /**
     * 转换瓦片
     * @param dir
     * @param zoom
     */
    private static void execute(File dir, int zoom){
        if (dir.isDirectory()) {
            File[] xfs = dir.listFiles();
            for (int i = 0; i < xfs.length; i++) {
                File xf = xfs[i];
                if (xf.isDirectory()) {
                    File[] yfs = xf.listFiles();//Y轴为瓦片文件,先替换文件再替换文件夹
                    for (int j = 0; j < yfs.length; j++) {
                        File yf = yfs[j];
                        String yName = yf.getName();
                        String path = yf.getParent();
                        String fileType = yName.replaceAll("\\d", "");
                        if (yf.isFile()
                                && yName.matches("^\\d+\\.(png|jpg){1}$")) {//只有png和jpg后缀的文件才替换
                            int newY = googleToBaiduY(Integer.valueOf(yName
                                    .replaceAll("\\D", "")), zoom);
                            File yNew = new File(path + File.separator
                                    + newY + fileType);
                            yf.renameTo(yNew);
//                            System.out.println(yName + "to"
//                                    + yNew.getName());
                        }
                    }
                    int nX = googleToBaiduX(Integer.valueOf(xf.getName()), zoom);
                    File newX = new File(xf.getParent() + File.separator
                            + nX);
                    xf.renameTo(newX);//X轴为文件夹
                    // System.out.println(xf.getName()+"to"+newX.getName());
                }
            }
        }
    }
    private static int googleToBaiduX(int x, int z) {
        int b = baiduX[z - 1];// 395
        int g = googleX[z - 1];// 11:843,12:1685
        // int gx = g + (x-b);// --- 1587+
        int gx = x - g + b;// --- 1587+
        // 谷歌瓦片行编号=[谷歌参照瓦片行编号+(百度行编号 – 百度参照瓦片行编号)]
        return gx;
    }

    private static int googleToBaiduY(int y, int z) {
        int b = baiduY[z - 1];// 147
        int g = googleY[z - 1];// 10:
        // int gy = g - (y-b);//
        int gy = g + b - y;//
        // 谷歌瓦片列编号=[谷歌参照瓦片列编号- (百度列编号 – 百度参照瓦片列编号)] //向上，列为递减
        return gy;
    }
}