package com.pashanhoo.common;

import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import org.apache.commons.codec.binary.Base64;

import java.io.*;

public class PdfUtil {


    /**
     * 获取文件base64
     *
     */
    public static String fileToBase64(InputStream in) {
        String base64String="";
        try {
            byte[] bytes = toByteArray(in);
            in.read(bytes);
            base64String = Base64.encodeBase64String(bytes);

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != in) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return base64String;
        }
    }

    public static byte[] toByteArray(InputStream input) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024*4];
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
        }
        return output.toByteArray();
    }
}