Webdriver配合Tesseract-OCR 自动识别简单的验证码（code）

//http://www.cnblogs.com/tobecrazy/p/4691045.html
package test.test2;

import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.concurrent.TimeUnit;

import javax.imageio.ImageIO;

import org.apache.commons.io.FileUtils;
import org.openqa.selenium.By;
import org.openqa.selenium.OutputType;
import org.openqa.selenium.Point;
import org.openqa.selenium.TakesScreenshot;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

//import com.dbyl.libarary.utils.DriverFactory;

public class TesseractTest {

    public static void main(String[] args) throws IOException, InterruptedException {

//        WebDriver driver = DriverFactory.getChromeDriver();
        WebDriver driver = new FirefoxDriver();
        driver.get("http://www.cnblogs.com/tobecrazy/p/4691045.html");
        driver.manage().timeouts().pageLoadTimeout(30, TimeUnit.SECONDS);
//        WebElement element = driver.findElement(By.xpath("//img"));
        WebElement element = driver.findElement(By.xpath(".//*[@id='cnblogs_post_body']/p[2]/img"));
        // take screen shot for element
        screenShotForElement(driver, element, "D:\\Tesseract-OCR\\test.png");

        driver.quit();

        // use Tesseract to get strings
        Runtime rt = Runtime.getRuntime();
        rt.exec("cmd.exe /C  tesseract.exe D:\\Tesseract-OCR\\test.png  D:\\Tesseract-OCR\\test -1 ");

        Thread.sleep(1000);
        // Read text
        readTextFile("D:\\Tesseract-OCR\\test.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();
        }
    }

    /**
     * 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();
        }
    }

}