Java phantomjs 网页截图

简介

根据传入的url对网页进行截图。打开网页和截取图片通过软件phantomjs.exe在后台静默完成。注：该过程不需要打开浏览器
优点：
1.该软件支持多个平台，包括Linux，Windows。
2.截取的界面和浏览器看到的相同，注：浏览器全屏模式下。
缺点：
1.页面打开时间慢
2.无法精确判断页面加载完成
3.为解决以上问题，截取图片的时间需要设置的比较长

phantomjs.exe下载

根据运行环境下载相应的版本
https://phantomjs.org/download.html

网页截图工具类

 * 网页截图工具
 *
 * @author archie
 * @date 2018-11-21
 */
public class ScreenShotUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(ScreenShotUtil.class);

    private static ThreadPoolTaskExecutor taskExecutor = (ThreadPoolTaskExecutor) SpringContextUtil.getBean("taskExecutor");

  
    /**
     * 截图
     *
     * @param url 网址
     * @param filePath 截图保存位置
     * @param resSubType
     */
    public static void screenWaveShot(String url, String filePath, Integer resSubType) {
        WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
        ServletContext servletContext = webApplicationContext.getServletContext();
        //软件部署路径
        String realPath = servletContext.getRealPath("/") + "phantomjs/";
        String exePath = realPath + "phantomjs.exe  ";
        String jsPath = realPath + "screenshotSize.js  ";
        Process process = null;
       //设置偏移量 长 宽
        int top = 85;
        int left = 100;
        int width = 100;
        int height = 100;
        try {
            String waitTime = ConfigKit.use("config").get(CommonConstant.SHOT_URL_WAVE_TIME);
            process = Runtime.getRuntime().exec(exePath + jsPath + url + "  " + filePath + "  " + top + "  " +
                    left + "  " + width + "  " + height + "  " + waitTime);
            //防止程序阻塞
            taskExecutor.execute(new InputStreamRunnable(process.getErrorStream(), filePath, 1));
            taskExecutor.execute(new InputStreamRunnable(process.getInputStream(), null, 1));
            process.waitFor();
            LOGGER.info(url);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (process != null) {
                process.destroy();
            }
        }
    }
}

输出缓存区的内容 防止阻塞

/**
 * 读取InputStream的线程
 *
 * @author 
 * @date 2018-12-03
 */
public class InputStreamRunnable implements Runnable {
    private static final Logger LOGGER = LoggerFactory.getLogger(InputStreamRunnable.class);


    private BufferedReader bReader = null;
    private String fileUrl = null;
    private Integer logOut = null;

    /**
     * 输出inputStream的内容
     *
     * @param is     inputstream 流
     * @param url    截图的地址
     * @param logOut 是否输出日志 1:输出 0：不输出
     */
    public InputStreamRunnable(InputStream is, String url, Integer logOut) {
        try {
            bReader = new BufferedReader(new InputStreamReader(new BufferedInputStream(is), "GBK"));
            fileUrl = url;
            this.logOut = logOut;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
        StringBuffer line = new StringBuffer();
        try {
            String str = "";
            while ((str = bReader.readLine()) != null) {
                line.append(str).append(System.lineSeparator());
            }
            if (logOut != null && logOut == 1) {
                if (!StringUtils.isEmpty(line.toString())) {
                    LOGGER.info(line.toString());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (bReader != null) {
                    bReader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

phantomJs 脚本

/**
 * phantomJs 脚本
 */
var page = require('webpage').create(), system = require('system'), address, output, size;
page.settings.userAgent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.120 Safari/537.36';
//page.settings.userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36"
/*page.onConsoleMessage = function (msg, line, source) {
    console.log(msg);
};*/
if (system.args.length < 3 || system.args.length > 10) {
    phantom.exit(1);
} else {
    address = system.args[1];
    output = system.args[2];
    //定义宽高
    page.viewportSize = {
        width: 1920,
        height: 1080
    };
    page.open(address, function (status) {
        if (status !== "success") {
            console.log('FAIL to load the address');
            phantom.exit(1);
        }
        var bb = page.evaluate(function () {
            return document.getElementsByTagName('html')[0].getBoundingClientRect();
        });
        page.clipRect = {
            top: system.args[3],
            left: system.args[4],
            width: system.args[5],
            height: system.args[6]
        };
        window.setTimeout(function () {
            //console.log(address);
            page.render(output);
            page.close();
            phantom.exit();
        }, system.args[7]);
    });
}