需要说一下，这里说的方法对简单的图片读数字的正确率是非常高的。但是对于复杂的如字母、甚至汉字，正确率就不敢保证了。对于那些图片背景十分混乱，肉眼都得仔细分辨的，为了您的宝贵时间，就不要往下看了。

需要引入的jar包：

<!--图片识别-->
        <dependency>
            <groupId>net.java.dev.jna</groupId>
            <artifactId>jna</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>net.sourceforge.tess4j</groupId>
            <artifactId>tess4j</artifactId>
            <version>2.0.1</version>
            <exclusions>
                <exclusion>
                    <groupId>com.sun.jna</groupId>
                    <artifactId>jna</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

代码：

import com.camel.common.utils.HttpClient;
import net.sourceforge.tess4j.ITesseract;
import net.sourceforge.tess4j.Tesseract;
import net.sourceforge.tess4j.TesseractException;
import net.sourceforge.tess4j.util.LoadLibs;
import org.apache.commons.io.IOUtils;
import org.apache.http.HttpResponse;

import java.io.*;

/**
 * 测试类
 */
public class TestOne {
public static void main(String[] args) throws Exception {
downloadJPG(HttpClient.post("验证码url", "time=" + System.currentTimeMillis()),"1.jpg");
String code = getImgContent("1.jpg");
System.out.println("验证码 = " + code);
}

protected static void downloadJPG(HttpResponse httpResponse,String fileName) throws IOException {
InputStream input = httpResponse.getEntity().getContent();
OutputStream output = new FileOutputStream(new File(fileName));
IOUtils.copy(input, output);
if (output != null) {
output.close();
}
output.flush();
}

protected static String getImgContent(String imgUrl) {
String content = "";
File imageFile = new File(imgUrl);
//读取图片数字
ITesseract instance = new Tesseract();

File tessDataFolder = LoadLibs.extractTessResources("tessdata");
instance.setLanguage("eng");//英文库识别数字比较准确
instance.setDatapath(tessDataFolder.getAbsolutePath());

try {
content = instance.doOCR(imageFile).replace("\n", "");
System.out.println(content);
} catch (TesseractException e) {
System.err.println(e.getMessage());
}
return content;
}
}
--------------------- 
作者：江流川 
来源：CSDN 
原文：https://blog.csdn.net/fgx_123456/article/details/79088150 
版权声明：本文为博主原创文章，转载请附上博文链接！