识别图形验证码 (Scala 示例)

安装所需依赖
在你的 build.sbt 文件中添加以下依赖：

scala

libraryDependencies += "org.scalaj" %% "scalaj-http" % "2.4.2"
下载并保存验证码图片
使用 scalaj-http 下载验证码图片并保存到本地：

scala

import scalaj.http._
import java.nio.file.{Files, Paths}

object CaptchaDownloader {
def downloadCaptcha(url: String, savePath: String): Unit = {
val response = Http(url).asBytes
Files.write(Paths.get(savePath), response.body)
println(s"验证码图片已保存为 $savePath")
}

def main(args: Array[String]): Unit = {
val captchaUrl = "https://captcha7.scrape.center/captcha.png"
val savePath = "captcha.png"
downloadCaptcha(captchaUrl, savePath)
}
}
图像处理和 OCR 识别
使用 Java AWT 进行图像处理，并使用 Tesseract 进行验证码识别：

scala

import java.awt.image.BufferedImage
import javax.imageio.ImageIO
import java.io.File
import net.sourceforge.tess4j.{ITesseract, Tesseract}

object CaptchaProcessor {
def preprocessImage(inputPath: String, outputPath: String): Unit = {
val image: BufferedImage = ImageIO.read(new File(inputPath))
// 转为灰度图像
val grayImage = new BufferedImage(image.getWidth, image.getHeight, BufferedImage.TYPE_BYTE_GRAY)
grayImage.getGraphics.drawImage(image, 0, 0, null)
ImageIO.write(grayImage, "png", new File(outputPath))
println(s"处理后的验证码图片已保存为 $outputPath")
}

def recognizeCaptcha(imagePath: String): String = {
val tesseract: ITesseract = new Tesseract()
tesseract.setDatapath("/path/to/tessdata") // 设置tessdata路径
tesseract.doOCR(new File(imagePath))
}
}
自动化登录
使用 scalaj-http 发送登录请求，携带识别到的验证码进行自动化登录：

scala

object CaptchaLogin {
def login(username: String, password: String, captcha: String): Unit = {
val response = Http("https://captcha7.scrape.center/login")
.postData(s"""{"username":"$username", "password":"$password", "captcha":"$captcha"}""")
.header("Content-Type", "application/json")
.asString

if (response.is2xx) {
  println("登录成功")
} else {
  println("登录失败")
}更多内容联系1436423940

}

def main(args: Array[String]): Unit = {
val processedPath = "captcha_processed.png"
CaptchaProcessor.preprocessImage("captcha.png", processedPath)
val captchaText = CaptchaProcessor.recognizeCaptcha(processedPath)
login("admin", "admin", captchaText)
}
}