java+selenium爬取图片签名的方法

2019-11-26 08:40:28

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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>

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