Springboot发布/{z}/{x}/{y}.png地图瓦片服务

服务读取本地文件型地图瓦片

import com.sailen.tpm.modules.signal.config.TpmConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Optional;

@RestController
@RequestMapping("/map")
public class MapPublicController {
    

    @GetMapping("/{layer}/{level}/{col}/{row}")
    public void xyz(@PathVariable String layer, @PathVariable String level, @PathVariable String col,
                    @PathVariable String row, HttpServletResponse response) {
        String dataPath = "your data path";
        StringBuffer buffer = new StringBuffer(dataPath);
        buffer.append("/").append(layer)
                .append("/").append(level)
                .append("/").append(col)
                .append("/").append(row);
        try {
            String tilePath = buffer.toString();
            InputStream inputStream = new FileInputStream(tilePath);
            if (Optional.of(inputStream).isPresent()) {
                BufferedImage bi = ImageIO.read(inputStream);
                ImageIO.write(bi, "PNG", response.getOutputStream());
                bi.flush();
                inputStream.close();
            }
        } catch (IOException e) {
            System.out.println(String.format("%s/%d/%d/%s请求瓦片出错!", layer, level, col, row));
        }
    }


}

前台请求，leaflet为例

var map = L.map('map', {
        crs: L.CRS.EPSG3857,
        center: [34.7, 113.6],
        zoom: 12
    })

    L.tileLayer('http://localhost:8080/appname/map/youlayer/{z}/{x}/{y}.png', {
        attribution: '© OpenStreetMap contributors'
    }).addTo(this.map)

其中appname依据项目context-path自行更改，youlayer根据瓦片文件夹自行设定。