jxyh/src/main/java/kd/imc/rim/utils/FileOutputStreamExample.java

package kd.imc.rim.utils;

import kd.bos.url.UrlService;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Base64;

import static kd.bos.algox.flink.enhance.krpc.impl.DispatcherImpl.log;

public class FileOutputStreamExample {
    public static void main(String[] args) {
        String filePath = "C:/Users/TR/Desktop/测试1.pdf";
        String imgStrToBase64 = getImgStrToBase64(filePath);

    }
    /**
     * 将网络链接图片或者本地图片文件转换成Base64编码字符串
     *
     * @param imgStr 网络图片Url/本地图片目录路径
     * @return
     */
    public static String getImgStrToBase64(String imgStr) {
        InputStream inputStream = null;
        ByteArrayOutputStream outputStream = null;
        byte[] buffer = null;
        try {
            //判断网络链接图片文件/本地目录图片文件
            if (imgStr.startsWith("http://") || imgStr.startsWith("https://")) {
                // 创建URL
                URL url = new URL(imgStr);
                // 创建链接
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                conn.setConnectTimeout(5000);
                inputStream = conn.getInputStream();
                outputStream = new ByteArrayOutputStream();
                // 将内容读取内存中
                buffer = new byte[1024];
                int len = -1;
                while ((len = inputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, len);
                }
                buffer = outputStream.toByteArray();
            } else {
                inputStream = new FileInputStream(imgStr);
                int count = 0;
                while (count == 0) {
                    count = inputStream.available();
                }
                buffer = new byte[count];
                inputStream.read(buffer);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    // 关闭inputStream流
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (outputStream != null) {
                try {
                    // 关闭outputStream流
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        // 对字节数组Base64编码
        return Base64.getEncoder().encodeToString(buffer);
    }

    public static File getNetUrlHttp(String netUrl) {
       // UrlService.getAttachmentFullUrl(netUrl);
        //对本地文件命名
        File file = null;
        URL urlfile;
        InputStream inStream = null;
        OutputStream os = null;
        try {
            file = File.createTempFile("net_url", netUrl);
            //下载
            urlfile = new URL(netUrl);
            inStream = urlfile.openStream();
            os = new FileOutputStream(file);

            int bytesRead = 0;
            byte[] buffer = new byte[8192];
            while ((bytesRead = inStream.read(buffer, 0, 8192)) != -1) {
                os.write(buffer, 0, bytesRead);
            }
        } catch (Exception e) {
            log.error("远程图片获取错误："+netUrl);
            e.printStackTrace();
        } finally {
            try {
                if (null != os) {
                    os.close();
                }
                if (null != inStream) {
                    inStream.close();
                }

            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        return file;
    }

}