网站制作比较好的制作公司seo技巧与技术
1.找开发去掉验证码或者使用万能验证码
2.使用OCR自动识别
使用OCR自动化识别，一般识别率不是太高，处理一般简单验证码还是没问题
这里使用的是Tesseract-OCR,下载地址：https://github.com/A9T9/Free-Ocr-Windows-Desktop/releases
怎么使用呢？
进入安装后的目录：
tesseract.exe test.png test -1
准备一份网页，上面使用该验证码
<html>
<head>
<title>Table test by Young</title>
</head>
<body></br>
<h1> Test </h1><img src="http://csujwc.its.csu.edu.cn/sys/ValidateCode.aspx?t=1"></br>
</body>
</html>
要识别验证码，首先得取得验证码，这两款采取对 页面元素部分截图的方式，首先获取整个页面的截图
然后找到页面元素坐标进行截取
/*** This method for screen shot element* * @param driver* @param element* @param path* @throws InterruptedException*/public static void screenShotForElement(WebDriver driver,WebElement element, String path) throws InterruptedException {File scrFile = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);try {Point p = element.getLocation();int width = element.getSize().getWidth();int height = element.getSize().getHeight();Rectangle rect = new Rectangle(width, height);BufferedImage img = ImageIO.read(scrFile);BufferedImage dest = img.getSubimage(p.getX(), p.getY(),rect.width, rect.height);ImageIO.write(dest, "png", scrFile);Thread.sleep(1000);FileUtils.copyFile(scrFile, new File(path));} catch (IOException e) {e.printStackTrace();}}
截取完元素，就可以调用Tesseract-OCR生成text
// use Tesseract to get stringsRuntime rt = Runtime.getRuntime();rt.exec("cmd.exe /C tesseract.exe D:\\Tesseract-OCR\\test.png D:\\Tesseract-OCR\\test -1 ");
接下来通过java读取txt
/*** This method for read TXT file* * @param filePath*/public static void readTextFile(String filePath) {try {String encoding = "GBK";File file = new File(filePath);if (file.isFile() && file.exists()) { // 判断文件是否存在InputStreamReader read = new InputStreamReader(new FileInputStream(file), encoding);// 考虑到编码格式BufferedReader bufferedReader = new BufferedReader(read);String lineTxt = null;while ((lineTxt = bufferedReader.readLine()) != null) {System.out.println(lineTxt);}read.close();} else {System.out.println("找不到指定的文件");}} catch (Exception e) {System.out.println("读取文件内容出错");e.printStackTrace();}}
整体代码如下：
1 package com.dbyl.tests;2 3 import java.awt.Rectangle;4 import java.awt.image.BufferedImage;5 import java.io.BufferedReader;6 import java.io.File;7 import java.io.FileInputStream;8 import java.io.IOException;9 import java.io.InputStreamReader;10 import java.io.Reader;11 import java.util.concurrent.TimeUnit;12 13 import javax.imageio.ImageIO;14 15 import org.apache.commons.io.FileUtils;16 import org.openqa.selenium.By;17 import org.openqa.selenium.OutputType;18 import org.openqa.selenium.Point;19 import org.openqa.selenium.TakesScreenshot;20 import org.openqa.selenium.WebDriver;21 import org.openqa.selenium.WebElement;22 23 import com.dbyl.libarary.utils.DriverFactory;24 25 public class TesseractTest {26 27 public static void main(String[] args) throws IOException,28 InterruptedException {29 30 WebDriver driver = DriverFactory.getChromeDriver();31 driver.get("file:///C:/Users/validation.html");32 driver.manage().timeouts().pageLoadTimeout(30, TimeUnit.SECONDS);33 WebElement element = driver.findElement(By.xpath("//img"));34 35 // take screen shot for element36 screenShotForElement(driver, element, "D:\\Tesseract-OCR\\test.png");37 38 driver.quit();39 40 // use Tesseract to get strings41 Runtime rt = Runtime.getRuntime();42 rt.exec("cmd.exe /C tesseract.exe D:\\Tesseract-OCR\\test.png D:\\Tesseract-OCR\\test -1 ");43 44 Thread.sleep(1000);45 // Read text46 readTextFile("D:\\Tesseract-OCR\\test.txt");47 }48 49 /**50 * This method for read TXT file51 * 52 * @param filePath53 */54 public static void readTextFile(String filePath) {55 try {56 String encoding = "GBK";57 File file = new File(filePath);58 if (file.isFile() && file.exists()) { // 判断文件是否存在59 InputStreamReader read = new InputStreamReader(60 new FileInputStream(file), encoding);// 考虑到编码格式61 BufferedReader bufferedReader = new BufferedReader(read);62 String lineTxt = null;63 while ((lineTxt = bufferedReader.readLine()) != null) {64 System.out.println(lineTxt);65 }66 read.close();67 } else {68 System.out.println("找不到指定的文件");69 }70 } catch (Exception e) {71 System.out.println("读取文件内容出错");72 e.printStackTrace();73 }74 }75 76 /**77 * This method for screen shot element78 * 79 * @param driver80 * @param element81 * @param path82 * @throws InterruptedException83 */84 public static void screenShotForElement(WebDriver driver,85 WebElement element, String path) throws InterruptedException {86 File scrFile = ((TakesScreenshot) driver)87 .getScreenshotAs(OutputType.FILE);88 try {89 Point p = element.getLocation();90 int width = element.getSize().getWidth();91 int height = element.getSize().getHeight();92 Rectangle rect = new Rectangle(width, height);93 BufferedImage img = ImageIO.read(scrFile);94 BufferedImage dest = img.getSubimage(p.getX(), p.getY(),95 rect.width, rect.height);96 ImageIO.write(dest, "png", scrFile);97 Thread.sleep(1000);98 FileUtils.copyFile(scrFile, new File(path));99 } catch (IOException e) {
100 e.printStackTrace();
101 }
102 }
103
104 }