爬虫中遇到登录验证码，java 如何识别图片验证码

逃离我推掉我的手 2022-02-28 06:44 736阅读 0赞

[https://blog.csdn.net/persistencegoing/article/details/84376427][https_blog.csdn.net_persistencegoing_article_details_84376427]

import java.awt.image.BufferedImage;  
import java.io.File;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.OutputStream;  
import java.util.Date;

import javax.imageio.ImageIO;

import org.apache.commons.httpclient.HttpClient;  
import org.apache.commons.httpclient.HttpStatus;  
import org.apache.commons.httpclient.methods.GetMethod;  
import org.apache.commons.io.IOUtils;

import com.asprise.ocr.Ocr;  
import com.asprise.util.ocr.OCR;

public class ReadImg \{  
public static void main(String\[\] args) throws IOException \{  
HttpClient httpClient = new HttpClient();  
GetMethod getMethod = new GetMethod(“http://dz.bjjtgl.gov.cn/service/checkCode.do”);  
//    GetMethod getMethod = new GetMethod(“https://dynamic.12306.cn/otsweb/passCodeAction.do?rand=sjrand”);  
int statusCode = httpClient.executeMethod(getMethod);  
if (statusCode != HttpStatus.SC\_OK) \{  
System.err.println("Method failed: " + getMethod.getStatusLine());  
return ;  
\}  
String picName = “F:\\img\\”;  
File filepic=new File(picName);  
if(!filepic.exists())  
filepic.mkdir();  
File filepicF=new File(picName+new Date().getTime() + “.jpg”);  
InputStream inputStream = getMethod.getResponseBodyAsStream();  
OutputStream outStream = new FileOutputStream(filepicF);  
IOUtils.copy(inputStream, outStream);  
outStream.close();

Ocr.setUp(); // one time setup  
    Ocr ocr = new Ocr(); // create a new OCR engine  
    ocr.startEngine("eng", Ocr.SPEED\_FASTEST); // English  
    String s = ocr.recognize(new File\[\] \{filepicF\},Ocr.RECOGNIZE\_TYPE\_TEXT, Ocr.OUTPUT\_FORMAT\_PLAINTEXT);  
    System.out.println("Result: " + s);  
    System.out.println("图片文字为:" + s.replace(",", "").replace("i", "1").replace(" ", "").replace("'", "").replace("o", "0").replace("O", "0").replace("g", "6").replace("B", "8").replace("s", "5").replace("z", "2"));  
    // ocr more images here ...  
    ocr.stopEngine();  
\}  
\}  
注意：主要的jar包

1.aocr.jar – 去Asprise官网下载最新jar包 http://asprise.com/royalty-free-library/java-ocr-for-windows-mac-linux-download.html

2.commons-codec.jar

3.commons-httpclient-3.1.jar

4.commons-io.jar

5.commons-logging-1.0.4.jar

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[https_blog.csdn.net_persistencegoing_article_details_84376427]: https://blog.csdn.net/persistencegoing/article/details/84376427