java+selenium爬取图片签名的方法
本文实例为大家分享了java+selenium爬取图片签名的具体实现方法,供大家参考,具体内容如下
学习记录:
1.注意
对应的版本非常重要,使用selenium得下载与游览器版本相对应的插件,有火狐和谷歌我用的谷歌,贴下谷歌driver的插件
查看谷歌版本:
2.插件存放路径
3.获取签名图片存放路径
4.Controller代码如下
@ResponseBody @RequestMapping(value = "signatureGenerationv") public String signatureGeneration(String userName, HttpServletRequest request) throws Exception{ System.setProperty("webdriver.chrome.driver", ".\\Tools\\chromedriver.exe"); //初始化一个谷歌浏览器实例,实例名称叫driver WebDriver driver = new ChromeDriver(); // get()打开一个站点 driver.get("https://www.yishuzi.cn/qianming/"); //签名 driver.findElement(By.xpath("//*[@id=\"text\"]")).clear(); driver.findElement(By.xpath("//*[@id=\"text\"]")).sendKeys(userName); //签名配色 driver.findElement(By.xpath("//*[@id=\"index\"]/div[1]/div/div[4]/div[2]/div/div[7]/div/div/p[2]/a[2]")).click(); //最大化窗口 driver.manage().window().maximize(); Thread.sleep(2000); WebElement webElement = driver.findElement(By.xpath("//*[@id=\"SaveImg\"]")); //生成签名图片,裁剪图片 byte[] imageData = BrowserUtil.captureElement(webElement); //设置隐性等待时间 driver.manage().timeouts().implicitlyWait(8, TimeUnit.SECONDS); //getTitle()获取当前页面title的值 System.out.println("当前打开页面的标题是: "+ driver.getTitle()); //关闭并退出浏览器 driver.quit(); //把图片转换成能够在页面直接展示的BASE64Encoder格式 BASE64Encoder base64Encoder = new BASE64Encoder(); String img = base64Encoder.encode(imageData); return img; }
5.BrowserUtil工具类代码
public static byte[] captureElement(WebElement element) throws Exception { WrapsDriver wrapsDriver = (WrapsDriver) element; // 截图整个页面 byte[] screen = ((TakesScreenshot) wrapsDriver.getWrappedDriver()).getScreenshotAs(OutputType.BYTES); ByteArrayOutputStream out = new ByteArrayOutputStream(); try { BufferedImage img = ImageIO.read(new ByteArrayInputStream(screen)); ImageIO.write(img, "png", new File("img/imgs/img"+System.currentTimeMillis()+".png")); // 获得元素的高度和宽度 int width = element.getSize().getWidth(); int height = element.getSize().getHeight(); // 创建一个矩形使用上面的高度,和宽度 java.awt.Rectangle rect = new java.awt.Rectangle(width, height); // 得到元素的坐标 Point p = element.getLocation(); float rate = img.getWidth()/1280; BufferedImage dest = img.getSubimage( (int)(p.getX()*rate), (int)(p.getY()*rate), (int)(rect.width*rate),(int)(rect.height*rate)); ImageIO.write(dest, "png", new File("img/"+System.currentTimeMillis()+".png")); boolean flag = ImageIO.write(dest, "png", out); byte[] imageData = out.toByteArray(); return imageData; } finally { out.close(); } }
6.index.html代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>签名生成</title> <script type="text/javascript" src="js/jquery-3.3.1.min.js"></script> </head> <body> <div> 请输入名字:<input type="text" id="userName" name="userName"><input type="button" id="btn" value="生成"> <!--<img id="img" src="">--> <div id="img"></div> </div> <script> $("#btn").click(function () { var userName = $("#userName").val(); $.ajax({ url : "signatureGenerationv", type : "post", // dataType :"string", data :{'userName':userName}, success : function(data) { data = data.replace(/\\n/g,'\n')//去换行 var str = data.substring(0,data.length) var base = "data:image/png;base64,"+str; var img = new Image();//创建img容器 img.src = base; document.body.appendChild(img); }, error : function(data) { alert("失败"+data.responseText) } }) }) </script> </body> </html>
7.结果图
8.pom包
<!--selenium依赖文件--> <!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-java --> <dependency> <groupId>org.seleniumhq.selenium</groupId> <artifactId>selenium-java</artifactId> <version>3.8.1</version> </dependency> <!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-server --> <dependency> <groupId>org.seleniumhq.selenium</groupId> <artifactId>selenium-server</artifactId> <version>3.8.1</version> </dependency> <!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-chrome-driver --> <dependency> <groupId>org.seleniumhq.selenium</groupId> <artifactId>selenium-chrome-driver</artifactId> <version>3.8.1</version> </dependency> <!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-chrome-driver --> <dependency> <groupId>org.seleniumhq.selenium</groupId> <artifactId>selenium-chrome-driver</artifactId> <version>3.8.1</version> </dependency> <dependency> <groupId>org.seleniumhq.selenium</groupId> <artifactId>selenium-htmlunit-driver</artifactId> <version>2.52.0</version> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.5</version> </dependency>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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