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前言

Tesseract 是世界上最知名、应用最广泛的开源 OCR 引擎。它由 Google 积极维护，功能强大，支持多种语言和平台。虽然它在处理理想条件下的印刷文本时表现出色，但其精度会受到图像质量和复杂性的影响。它通常作为核心引擎被集成到各种应用程序、脚本和更大型的系统中，是许多需要文本提取功能的项目的首选开源解决方案。

一、安装 tesseract （OCR）

安装链接：Index of /tesseract (uni-mannheim.de)

二、下载训练数据

通过网盘分享的文件：tessdata各语言集合包.zip
链接: https://pan.baidu.com/s/13oPR2r7qOE6lt6SgbpWOQA 提取码: uaaw 

三、创建springboot项目

 1、导入依赖

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

2、编写配置类

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配置类* @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;@Beanpublic Tesseract tesseract() {Tesseract tesseract = new Tesseract();// 设置训练数据文件夹路径tesseract.setDatapath(dataPath);// 设置为中文简体tesseract.setLanguage(language);return tesseract;}
}

3、编写controller

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识别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));// 调用OcrService中的方法进行文字识别return ocrService.recognizeText(file);}
}

5、编写service

package com.songwp.service;import net.sourceforge.tess4j.TesseractException;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;/*** @ClassName：OcrService* @Description: ocr识别接口* @Author: songwp* @Date: 2025/6/29 19:27*/
public interface OcrService {public String recognizeText(MultipartFile imageFile) throws IOException, TesseractException;
}

5、编写service实现类

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识别实现类* @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 要识别的图片* @return*/@Overridepublic String recognizeText(MultipartFile imageFile) throws IOException, TesseractException {// 转换InputStream sbs = new ByteArrayInputStream(imageFile.getBytes());BufferedImage bufferedImage = ImageIO.read(sbs);// 对图片进行文字识别return tesseract.doOCR(bufferedImage);}
}

6、运行调试

 注：图片颜色比较多的时候有有点识别不清楚了以及一些带字体的文本