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</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="module-library">
<library>
<CLASSES>
<root url="jar://$USER_HOME$/Downloads/sqlite-jdbc-3.21.0-2.jar!/" />
</CLASSES>
<JAVADOC />
<SOURCES />
</library>
</orderEntry>
</component>
</module>
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public class CalEnv {
private int startX;
private int startY;
public CalEnv(int startX, int startY) {
this.startX = startX;
this.startY = startY;
}
public int getStartX() {
return startX;
}
public void setStartX(int startX) {
this.startX = startX;
}
public int getStartY() {
return startY;
}
public void setStartY(int startY) {
this.startY = startY;
}
}
import java.sql.SQLException;
public class Main {
public static void main(String[] args) throws SQLException {
System.out.println("Hello World!");
TiandituDownload tiandituDownload = new TiandituDownload("my.db");
Point pt = new Point(29.76,106.64);
Point pt2 = new Point(35.33, 108.12);
// tiandituDownload.Download(pt, pt2, 9, TianDiTuTiledMapServiceType.IMG_C);
tiandituDownload.Download(pt, pt2, 2,9, TianDiTuTiledMapServiceType.IMG_C);
}
}
public class Point {
private double lat;
private double lng;
public Point(){
}
public Point(double lat, double lng){
this.lat = lat;
this.lng = lng;
}
public double getLat() {
return lat;
}
public void setLat(double lat) {
this.lat = lat;
}
public double getLng() {
return lng;
}
public void setLng(double lng) {
this.lng = lng;
}
}
import java.util.Random;
/**
* Created by jiangbotao on 2018/3/23.
*/
public class TDTUrl {
private TianDiTuTiledMapServiceType _tiandituMapServiceType;
private int _level;
private int _col;
private int _row;
public TDTUrl(int level, int col, int row, TianDiTuTiledMapServiceType tiandituMapServiceType) {
this._level = level;
this._col = col;
this._row = row;
this._tiandituMapServiceType = tiandituMapServiceType;
}
public String generatUrl() {
StringBuilder url = new StringBuilder("http://t");
Random random = new Random();
int subdomain = (random.nextInt(6) + 1);
url.append(subdomain);
switch (this._tiandituMapServiceType) {
case VEC_C:
url.append(".tianditu.com/DataServer?T=vec_c&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
case CVA_C:
url.append(".tianditu.com/DataServer?T=cva_c&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
case CIA_C:
url.append(".tianditu.com/DataServer?T=cia_c&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
case IMG_C:
url.append(".tianditu.com/DataServer?T=img_c&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
case VEC_W:
url.append(".tianditu.com/DataServer?T=vec_w&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
case CVA_W:
url.append(".tianditu.com/DataServer?T=cva_w&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
case CIA_W:
url.append(".tianditu.com/DataServer?T=cia_w&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
case IMG_W:
url.append(".tianditu.com/DataServer?T=img_w&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);
break;
default:
return null;
}
return url.toString();
}
}
/**
* Created by jiangbotao on 2018/3/23.
*/
public enum TianDiTuTiledMapServiceType {
/**
* 矢量数据,CGCS2000
* */
VEC_C,
/**
* 影像数据
* */
IMG_C,
/**
* 矢量注记
* */
CVA_C,
/**
* 影像注记
* */
CIA_C,
/**
* 矢量数据，web墨卡托4326
*/
VEC_W,
/**
* 影像数据
* */
IMG_W,
/**
* 矢量注记
* */
CVA_W,
/**
* 影像注记
* */
CIA_W;
}
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.sql.*;
public class TiandituDownload {
double[] res = {
1.40625,
0.703125,
0.3515625,
0.17578125,
0.087890625,
0.0439453125,
0.02197265625,
0.010986328125,
0.0054931640625,
0.00274658203125,
0.001373291015625,
0.0006866455078125,
0.00034332275390625,
0.000171661376953125,
8.58306884765629E-05,
4.29153442382814E-05,
2.14576721191407E-05,
1.07288360595703E-05,
5.36441802978515E-06,
2.68220901489258E-06,
1.34110450744629E-06
};
double[] scale = {
400000000,
295497598.5708346,
147748799.285417,
73874399.6427087,
36937199.8213544,
18468599.9106772,
9234299.95533859,
4617149.97766929,
2308574.98883465,
1154287.49441732,
577143.747208662,
288571.873604331,
144285.936802165,
72142.9684010827,
36071.4842005414,
18035.7421002707,
9017.87105013534,
4508.93552506767,
2254.467762533835,
1127.2338812669175,
563.616940
};
int minLevel = 1;
int maxLevel = 2;
// 保存数据的sqlite文件路径
String dbpath;
Connection conn = null;
Statement stmt = null;
public TiandituDownload(String dbpath){
this.dbpath =dbpath;
}
private CalEnv calculateEnv(Point originPoint, int level){
int startX = (int) Math.floor((originPoint.getLng() + 180)/(256 * res[level]));
int startY = (int) Math.floor((90 - originPoint.getLat())/(256 * res[level]));
if(startX<0)startX = 0;
if(startY<0)startY = 0;
return new CalEnv(startX, startY);
}
private void Download(Point minPoint, Point maxPoint, int level, TianDiTuTiledMapServiceType type){
try{
CalEnv startEnv = calculateEnv(minPoint, level);
CalEnv stopEnv = calculateEnv(maxPoint, level);
// System.out.println(startEnv.getStartX() + ":" +startEnv.getStartY());
// System.out.println(stopEnv.getStartX() + ":" +stopEnv.getStartY());
PreparedStatement preparedStatement;
ResultSet rs;
for(int i = startEnv.getStartX(); i <= stopEnv.getStartX(); i++){
for(int j = stopEnv.getStartY(); j<= startEnv.getStartY(); j++){
boolean hasData = false;
try{
// 查询瓦片是否存在
String querySQL = "select * from " + type + " where TILELEVEL = " + level + " and TILECOL = " + i + " and TILEROW = " + j;
rs = stmt.executeQuery(querySQL);
while(rs.next()){
hasData = true;
}
// 如果不存在
if(!hasData){
String url = new TDTUrl(level, i, j, type).generatUrl();
// 获得地图瓦片
byte[] img = getTile(url);
System.out.println("正在下载 "+url);
// 将数据写入sqlite
String insertSQL = "INSERT INTO "+ type + "(TILELEVEL,TILECOL,TILEROW,TILEDATA) VALUES (?,?,?,?)";
preparedStatement = conn.prepareStatement(insertSQL);
preparedStatement.setInt(1, level);
preparedStatement.setInt(2, i);
preparedStatement.setInt(3, j);
preparedStatement.setBytes(4, img);
preparedStatement.execute();
}
}catch (Exception e){
System.out.println(e.getMessage());
}
}
conn.commit();
}
}catch (Exception e){
System.out.println(e.getMessage());
}
}
public void Download(Point minPoint, Point maxPoint, int minLevel, int maxLevel, TianDiTuTiledMapServiceType type) throws SQLException {
try {
Class.forName("org.sqlite.JDBC");
conn = DriverManager.getConnection("jdbc:sqlite:" + this.dbpath);
conn.setAutoCommit(false);
stmt = conn.createStatement();
// 新建数据表
String sql = "CREATE TABLE IF NOT EXISTS " + type +
"(TILELEVEL INT," +
"TILECOL INT," +
"TILEROW INT," +
"TILEDATA BLOB)";
stmt.executeUpdate(sql);
stmt.close();
for(int m = minLevel; m<= maxLevel; m++){
this.Download(minPoint, maxPoint, m, type);
}
conn.close();
System.out.println("下载完成");
}catch (Exception e){
}
}
protected byte[] getTile(String url) throws Exception {
byte[] result = null;
try {
// 如果没有就直接从web上读取
ByteArrayOutputStream bos = new ByteArrayOutputStream();
URL sjwurl = new URL(url);
HttpURLConnection httpUrl = null;
BufferedInputStream bis = null;
byte[] buf = new byte[1024];
httpUrl = (HttpURLConnection) sjwurl.openConnection();
httpUrl.connect();
bis = new BufferedInputStream(httpUrl.getInputStream());
while (true) {
int bytes_read = bis.read(buf);
if (bytes_read > 0) {
bos.write(buf, 0, bytes_read);
} else {
break;
}
}
bis.close();
httpUrl.disconnect();
result = bos.toByteArray();
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}
}