java+selenium爬取圖片簽名
學習記錄:
1.注意
對應的版本非常重要,使用selenium得下載與遊覽器版本相對應的插件，有火狐和谷歌我用的谷歌，貼下谷歌driver的插件:http://npm.taobao.org/mirrors/chromedriver/
查看谷歌版本:
2.插件存放路徑
3.獲取簽名圖片存放路徑
4.Controller代碼如下
@ResponseBody
@RequestMapping(value = "signatureGenerationv")
public String signatureGeneration(String userName, HttpServletRequest request) throws Exception{
System.setProperty("webdriver.chrome.driver", ".\\Tools\\chromedriver.exe");
//初始化一個谷歌瀏覽器實例，實例名稱叫driver
WebDriver driver = new ChromeDriver();
// get()打開一個站點
driver.get("https://www.yishuzi.cn/qianming/");
//簽名
driver.findElement(By.xpath("//*[@id=\"text\"]")).clear();
driver.findElement(By.xpath("//*[@id=\"text\"]")).sendKeys(userName);
//簽名配色
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\"]"));
//生成簽名圖片,裁剪圖片
byte[] imageData = BrowserUtil.captureElement(webElement);
//設置隱性等待時間
driver.manage().timeouts().implicitlyWait(8, TimeUnit.SECONDS);
//getTitle()獲取當前頁面title的值
System.out.println("當前打開頁面的標題是： "+ driver.getTitle());
//關閉並退出瀏覽器
driver.quit();
//把圖片轉換成能夠在頁面直接展示的BASE64Encoder格式
BASE64Encoder base64Encoder = new BASE64Encoder();
String img = base64Encoder.encode(imageData);
return img;
}
5.BrowserUtil工具類代碼
public static byte[] captureElement(WebElement element) throws Exception {
WrapsDriver wrapsDriver = (WrapsDriver) element;
// 截圖整個頁面
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"));
// 獲得元素的高度和寬度
int width = element.getSize().getWidth();
int height = element.getSize().getHeight();
// 創建一個矩形使用上面的高度，和寬度
java.awt.Rectangle rect = new java.awt.Rectangle(width, height);
// 得到元素的座標
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代碼
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>簽名生成</title>
<script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
</head>
<body>
<div>
請輸入名字:<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')//去換行
var str = data.substring(0,data.length)
var base = "data:image/png;base64,"+str;
var img = new Image();//創建img容器
img.src = base;
document.body.appendChild(img);
},
error : function(data) {
alert("失敗"+data.responseText)
}
})
})
</script>
</body>
</html>
7.結果圖
8.pom包
<!--selenium依賴文件-->
<!-- 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>