中国地图上描绘中国气象观测点位置

末蓝、 2022-10-02 05:51 136阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

package com.example.demo.controller;
    
    import com.example.demo.base.mybatis.util.Picture;
    import com.example.demo.base.mybatis.util.PictureUtil;
    import com.example.demo.domain.Name;
    import com.example.demo.service.NameService;
    import org.apache.commons.lang3.StringUtils;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.ArrayList;
    import java.util.List;
    
    @RestController
    public class HelloController {
    
        @Autowired
        private NameService nameService;
    
        /**
         * 中国地图上描绘中国气象观测点位置
         * @return
         * @throws Exception
         */
        @RequestMapping(value = "/draw")
        @ResponseBody
        public String draw() throws Exception {
            List<Name> names = nameService.findAll();//经纬度
            List<Picture> pictures = new ArrayList<>();
            for (Name name : names){
                Picture picture = new Picture();
                if(StringUtils.isNotBlank(name.getW()) && StringUtils.isNotBlank(name.getL())){
                    int x = (int)(PictureUtil.getW(73.47,Double.parseDouble(name.getL())));
                    int y = (int)(PictureUtil.getH(53.54,Double.parseDouble(name.getW())));
                    picture.setX(x+125);
                    picture.setY(y-60);
                    pictures.add(picture);
                }
            }
            PictureUtil.overlapBackground(pictures,"C:/下载/picture.png","C:/下载/lunkuo3.jpg");
            return names.get(0).getW()+"+"+names.get(0).getL();
        }
    }

package com.example.demo.base.mybatis.util;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.util.List;
    
    public class PictureUtil {
    
        private static final Logger log = LoggerFactory.getLogger(PictureUtil.class);
    
        /**
         * 遍历集合合成图片
         * @param pictures 画图需要的画笔
         * @param backPicturePath 背景图片位置
         * @param outFile 合成后图片位置
         * @throws Exception
         */
        public static final void overlapBackground(List<Picture> pictures,String outFile,String backPicturePath) throws Exception {
            BufferedImage big = ImageIO.read(new File(backPicturePath));
            Graphics2D g = big.createGraphics();
            for (Picture picture:pictures) {
                BufferedImage small = ImageIO.read(new File(outFile));
                g.setColor(Color.RED);
                g.setStroke(new BasicStroke(5));
                g.drawImage(small, picture.getX(), picture.getY(), small.getWidth(), small.getHeight(), null);
            }
            g.dispose();
            ImageIO.write(big, outFile.split("\\.")[1], new File(outFile));
        }
    
        public static double getH(double ydwd, double dwd){
            return (ydwd-dwd)*(116.2+(31.54-(ydwd-dwd))*0.9);
        }
    
        public static double getW(double ydjd, double djd){
            return (djd-ydjd)*86.5;
        }
    
    }

![lunkuo3][]![picture][]![运行结果][11102057_YlGb.png]

转载于:https://my.oschina.net/zhangshsURL/blog/1810618

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/81635e0879a74fd6b7dd729b9c4b682d.png
[lunkuo3]: https://static.oschina.net/uploads/img/201805/11101818_NDbz.jpg
[picture]: https://static.oschina.net/uploads/img/201805/11101901_4tE0.png
[11102057_YlGb.png]: https://static.oschina.net/uploads/img/201805/11102057_YlGb.png