java代码 ocr文字识别

以下是Java实现OCR文字识别的代码示例：

import java.io.*;
import java.net.*;
import java.util.*;

public class OCRDemo {
    public static void main(String[] args) {
        try {
            URL url = new URL("https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            connection.setRequestProperty("Connection", "Keep-Alive");
            connection.setUseCaches(false);
            connection.setDoOutput(true);
            connection.setDoInput(true);

            String param = "image=" + URLEncoder.encode(getImageStr("test.png"), "UTF-8");
            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(param.getBytes());
            outputStream.flush();
            outputStream.close();

            InputStream inputStream = connection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            StringBuilder stringBuilder = new StringBuilder();
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                stringBuilder.append(line);
            }
            System.out.println(stringBuilder.toString());
            bufferedReader.close();
            inputStream.close();
            connection.disconnect();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

    public static String getImageStr(String imagePath) {
        String imageStr = "";
        try {
            File file = new File(imagePath);
            FileInputStream fileInputStream = new FileInputStream(file);
            byte[] bytes = new byte[(int) file.length()];
            fileInputStream.read(bytes);
            imageStr = Base64.getEncoder().encodeToString(bytes);
            fileInputStream.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        return imageStr;
    }
}

这段代码使用了百度云OCR API进行文字识别，需要先在百度云平台上注册并创建应用，获取API Key和Secret Key。代码中的`test.png`为需要识别的图片文件名，可以根据实际情况进行修改。