Java生成Echarts统计图

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.nio.file.Files;
import java.util.Random;

/**
 * @Author shadow
 * @Date 2024/1/12 15:14
 * @Description echarts 图表转换成图片
 */
public class EchartsConvertUtil {

    private static final String projectPath = System.getProperty("user.dir");

    private static final String projectStaticPath = projectPath + "/src/main/resources/static/";

    private static final String jsPath = projectStaticPath + "js/echarts-convert.js";

    public static File convertToPic(String option) {
        // 拼接命令
        try {
            String picturePath = projectStaticPath + generateFileName();
            String cmd = "phantomjs " + jsPath + " -options " + "option=" + option + " -outfile " + picturePath;
            System.out.println(cmd);
            // 执行命令，window系统需要额外配置
            String osName = System.getProperties().getProperty("os.name");
            Process process = null;
            if (osName.toLowerCase().startsWith("win")) {
                process =  Runtime.getRuntime().exec("cmd /c " + cmd);
            } else {
                process =  Runtime.getRuntime().exec(cmd);
            }
//             打印控制台信息
            BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line = "";
            while ((line = input.readLine()) != null) {
                System.out.println(line);
            }
            input.close();
            //这里我把图片作为文件返回，以做后续处理，处理完可以 file.delete() 把文件删了
            File file = new File(picturePath);
            return file;
            //也可以把文件字节数组读出来，这里就可以直接删除，返回字节数组就好
//            byte[] bytes = Files.readAllBytes(file.toPath());
//            file.delete();
//            return bytes;
        } catch (Exception e) {
            return null;
        }
    }

    public static String generateFileName() {
        long currentTime = System.currentTimeMillis();
        String randomSuffix = generateRandomSuffix();
        return currentTime + randomSuffix + ".png";
    }

    private static String generateRandomSuffix() {
        Random random = new Random();
        int randomNum = random.nextInt(9000) + 1000; // 生成一个四位随机数
        return String.valueOf(randomNum);
    }

    public static void main(String[] args) {
        convertToPic("{xAxis:{type:'category',data:['Mon','Tue','Wed','Thu','Fri','Sat','Sun']},yAxis:{type:'value'},series:[{data:[120,200,150,80,70,110,130],type:'bar'}]};");
    }

}