java html2image

java html转图片

推荐一个好用的图形音频库：https://gitee.com/liuyueyi/quick-media

1.安装phantomjs

windows参考：

phantomjs安装步骤

mac和linux

# 1. 下载

## mac 系统
wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-2.1.1-macosx.zip

## linux 系统
wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-2.1.1-linux-x86_64.tar.bz2

# 2. 解压

sudo su 
tar -jxvf phantomjs-2.1.1-linux-x86_64.tar.bz2

# 如果解压报错，则安装下面的
# yum -y install bzip2

# 3. 安装

## 简单点，移动到bin目录下

cp phantomjs-2.1.1-linux-x86_64/bin/phantomjs /usr/local/bin

# 4. 验证是否ok
phantomjs --version

# 输出版本号，则表示ok

2.添加maven依赖

<!--phantomjs -->
<dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-java</artifactId>
    <version>2.53.1</version>
</dependency>
<dependency>
    <groupId>com.github.detro</groupId>
    <artifactId>ghostdriver</artifactId>
    <version>2.1.0</version>
</dependency>



<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

3测试代码

import org.openqa.selenium.OutputType;
import org.openqa.selenium.phantomjs.PhantomJSDriver;
import org.openqa.selenium.phantomjs.PhantomJSDriverService;
import org.openqa.selenium.remote.DesiredCapabilities;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * @Author: zhiyang.hu
 * @Date: 2021/7/29 14:39
 * @Description:
 */
public class Html2ImageByJsWrapper {
    public static void main(String[] args) throws IOException {
        BufferedImage img = null;
        String url = "https://phantomjs.org/download.html";
        long start = System.currentTimeMillis();
        img = Html2ImageByJsWrapper.renderHtml2Image(url);
        long end = System.currentTimeMillis();
        System.out.println("cost:  " + (end - start));
        FileOutputStream outputStream1 = new FileOutputStream(new File("C:\\Users\\wlt\\Desktop\\img\\html2image.png"));
        ImageIO.write(img, "png", outputStream1);
    }
    
    private static PhantomJSDriver webDriver = getPhantomJs();
    
    private static PhantomJSDriver getPhantomJs() {
        //设置必要参数
        DesiredCapabilities dcaps = new DesiredCapabilities();
        //ssl证书支持
        dcaps.setCapability("acceptSslCerts", true);
        //截屏支持
        dcaps.setCapability("takesScreenshot", true);
        //css搜索支持
        dcaps.setCapability("cssSelectorsEnabled", true);
        //js支持
        dcaps.setJavascriptEnabled(true);
        //驱动支持（第二参数表明的是你的phantomjs引擎所在的路径，which/whereis phantomjs可以查看）
        // fixme 这里写了执行， 可以考虑判断系统是否有安装，并获取对应的路径 or 开放出来指定路径
        dcaps.setCapability(PhantomJSDriverService.PHANTOMJS_EXECUTABLE_PATH_PROPERTY, "D:\\tools\\phantomjs-2.1.1-windows\\phantomjs-2.1.1-windows\\bin\\phantomjs.exe");
        //创建无界面浏览器对象
        return new PhantomJSDriver(dcaps);
    }
    
    public static BufferedImage renderHtml2Image(String url) throws IOException {
        webDriver.get(url);
        File file = webDriver.getScreenshotAs(OutputType.FILE);
        return ImageIO.read(file);
    }
}

最后效果：