springboot实现OCR

1、引入依赖

<dependency><groupId>net.sourceforge.tess4j</groupId><artifactId>tess4j</artifactId><version>4.5.4</version>
</dependency>

2、config

@Configuration
public class TessOcrConfiguration {@Beanpublic Tesseract tesseract() {Tesseract tesseract = new Tesseract();// 设置训练数据文件夹路径tesseract.setDatapath("D:/tessdata");// 设置为中文简体tesseract.setLanguage("chi_sim");return tesseract;}
}

3、定义api

@PostMapping(value = "/ocr", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public String ocr(@RequestParam("file") MultipartFile file) throws TesseractException, IOException {return weChatService.ocr(file);
}

4、定义service

@Resource
private Tesseract tesseract;@Override
public String ocr(MultipartFile file) throws TesseractException, IOException {InputStream sbs = new ByteArrayInputStream(file.getBytes());BufferedImage bufferedImage = ImageIO.read(sbs);return tesseract.doOCR(bufferedImage);
}

5、将官方的简体中文训练数据（后缀为.traineddata的文件）放到配置的目录（D:/tessdata）下

下边是官方训练数据的下载地址，打开后可以找到简体中文的文件 chi_sim.traineddata，下载下来放到指定位置就可以了

tess4j官方训练数据下载https://digi.bib.uni-mannheim.de/tesseract/tessdata_fast/6、测试效果