<dependency>
            <groupId>net.sourceforge.tess4j</groupId>
            <artifactId>tess4j</artifactId>
            <version>5.3.0</version>
</dependency>

package com.songwp.config;

import net.sourceforge.tess4j.Tesseract;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @ClassName：TesseractOcrConfig
 * @Description: ocr配置類
 * @Author: songwp
 * @Date: 2025/6/29 19:24
 */
@Configuration
public class TesseractOcrConfig {

    @Value("${tess4j.data-path}")
    private String dataPath;

    @Value("${tess4j.language}")
    private String language;

    @Bean
    public Tesseract tesseract() {

        Tesseract tesseract = new Tesseract();
        // 設置訓練數據文件夾路徑
        tesseract.setDatapath(dataPath);
        // 設置為中文簡體
        tesseract.setLanguage(language);
        return tesseract;
    }
}

package com.songwp.controller;

import com.songwp.service.OcrService;
import lombok.extern.slf4j.Slf4j;
import net.sourceforge.tess4j.TesseractException;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;

/**
 * @ClassName：OcrController
 * @Description: ocr識別controller
 * @Author: songwp
 * @Date: 2025/6/29 18:40
 */
@RestController
@RequestMapping("/ocr")
@Slf4j
public class OcrController {

    private final OcrService ocrService;

    public OcrController(OcrService ocrService) {
        this.ocrService = ocrService;
    }

    @PostMapping(value = "/recognize", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public String recognizeImage(@RequestParam("file") MultipartFile file) throws TesseractException, IOException {

        log.info(ocrService.recognizeText(file));
        // 調用OcrService中的方法進行文字識別
        return ocrService.recognizeText(file);
    }
}

package com.songwp.service;

import net.sourceforge.tess4j.TesseractException;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;

/**
 * @ClassName：OcrService
 * @Description: ocr識別接口
 * @Author: songwp
 * @Date: 2025/6/29 19:27
 */
public interface OcrService {

    public String recognizeText(MultipartFile imageFile) throws IOException, TesseractException;
}

package com.songwp.service.impl;

import com.songwp.service.OcrService;
import net.sourceforge.tess4j.Tesseract;
import net.sourceforge.tess4j.TesseractException;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * @ClassName：OcrServiceImpl
 * @Description: ocr識別實現類
 * @Author: songwp
 * @Date: 2025/6/29 19:28
 */
@Service
public class OcrServiceImpl implements OcrService {
    private final Tesseract tesseract;

    public OcrServiceImpl(Tesseract tesseract) {
        this.tesseract = tesseract;
    }

    /**
     *
     * @param imageFile 要識別的圖片
     * @return
     */
    @Override
    public String recognizeText(MultipartFile imageFile) throws IOException, TesseractException {
        // 轉換
        InputStream sbs = new ByteArrayInputStream(imageFile.getBytes());
        BufferedImage bufferedImage = ImageIO.read(sbs);

        // 對圖片進行文字識別
        return tesseract.doOCR(bufferedImage);
    }
}