package com.basic.analy.utils;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Base64;
import java.util.Date;

public class Base64Utils {
	final static Base64.Decoder decoder = Base64.getDecoder();//接码
	final static Base64.Encoder encoder = Base64.getEncoder();//编码
	
	public static void main(String[] args) throws Exception {
		//本地图片地址  34kB
		String url1 = "C:/Users/Administrator/Desktop/文档/wp/picture/carousel2.jpg";
		String url2 = "C:/Users/Administrator/Desktop/文档/wp/picture/bjmb.png";  // 4kB
		System.out.println( System.currentTimeMillis()+"start转码前");
		System.out.println(new Date());
		//在线图片地址
		String string = "https://ss1.baidu.com/9vo3dSag_xI4khGko9WTAnF6hhy/image/h%3D300/sign=4bfc640817d5ad6eb5f962eab1c939a3/8718367adab44aedb794e128bf1c8701a08bfb20.jpg";
		
		String str = Base64Utils.ImageToBase64ByLocal(url1);
		
	//	String ste = Base64Utils.ImageToBase64ByOnline(string);
		System.out.println( System.currentTimeMillis()+"start转码后");
		
		System.out.println(str);
		
		Base64Utils.Base64ToImage(str,"C:/Users/Administrator/Desktop/test1.jpg");
		System.out.println( System.currentTimeMillis()+"base64 转  图片");
		
		//Base64Utils.Base64ToImage(ste, "C:/Users/Administrator/Desktop/test2.jpg");
	}
 
	/**
	 * 本地图片转换成base64字符串
	 * @param imgFile	图片本地路径
	 * @return
	 *
	 * @author ZHANGJL
	 * @dateTime 2018-02-23 14:40:46
	 */
	public static String ImageToBase64ByLocal(String imgFile) {// 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
 
 
		InputStream in = null;
		byte[] data = null;
 
		// 读取图片字节数组
		try {
			in = new FileInputStream(imgFile);
			
			data = new byte[in.available()];
			in.read(data);
			in.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		// 对字节数组Base64编码
 
		return encoder.encodeToString(data);// 返回Base64编码过的字节数组字符串
	}
	// 将 流 装入 
	public static String ImageToBase64ByInputStream(FileInputStream in) {// 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
		 
		 
		//InputStream in = null;
		byte[] data = null;
		// 读取图片字节数组
		try {
			//in = new FileInputStream(imgFile);
			data = new byte[in.available()];
			in.read(data);
			in.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		// 对字节数组Base64编码
 
		return encoder.encodeToString(data);// 返回Base64编码过的字节数组字符串
	}
 
	
	
	/**
	 * 在线图片转换成base64字符串
	 * 
	 * @param imgURL	图片线上路径
	 * @return
	 *
	 * @author ZHANGJL
	 * @dateTime 2018-02-23 14:43:18
	 */
	public static String ImageToBase64ByOnline(String imgURL) {
		ByteArrayOutputStream data = new ByteArrayOutputStream();
		try {
			// 创建URL
			URL url = new URL(imgURL);
			byte[] by = new byte[1024];
			// 创建链接
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setRequestMethod("GET");
			conn.setConnectTimeout(5000);
			InputStream is = conn.getInputStream();
			// 将内容读取内存中
			int len = -1;
			while ((len = is.read(by)) != -1) {
				data.write(by, 0, len);
			}
			// 关闭流
			is.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		// 对字节数组Base64编码
		return encoder.encodeToString(data.toByteArray());
	}

	/**
	 * 在线图片转换成byte[]
	 *
	 * @param imgURL	图片线上路径
	 * @return
	 *
	 * @author ZHANGJL
	 * @dateTime 2018-02-23 14:43:18
	 */
	public static byte[] ImageToByteByOnline(String imgURL) {
		ByteArrayOutputStream data = new ByteArrayOutputStream();
		try {
			// 创建URL
			URL url = new URL(imgURL);
			byte[] by = new byte[1024*1024];
			// 创建链接
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setRequestMethod("GET");
			conn.setConnectTimeout(5000);

			InputStream is = conn.getInputStream();

			// 将内容读取内存中
			int len = -1;
			while ((len = is.read(by)) != -1) {
				data.write(by, 0, len);
			}
			// 关闭流
			is.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		// 对字节数组Base64编码
		/*String base64 = encoder.encodeToString(data.toByteArray());
		byte[] data1 = Base64Tobyte(base64);*/
		byte[] data1 = data.toByteArray();
		return data1;
	}
	
	/**
	 * base64字符串转换成图片
	 * @param imgStr		base64字符串
	 * @param imgFilePath	图片存放路径
	 * @return
	 *
	 * @author ZHANGJL
	 * @dateTime 2018-02-23 14:42:17
	 */
	public static boolean Base64ToImage(String imgStr,String imgFilePath) { // 对字节数组字符串进行Base64解码并生成图片
 
		if ("".equals(imgStr)) // 图像数据为空
			return false;
		try {
			// Base64解码
			byte[] b = decoder.decode(imgStr);
			for (int i = 0; i < b.length; ++i) {
				if (b[i] < 0) {// 调整异常数据
					b[i] += 256;
				}
			}
 
			OutputStream out = new FileOutputStream(imgFilePath);
			out.write(b);
			out.flush();
			out.close();
 
			return true;
		} catch (Exception e) {
			return false;
		}
 
	}
 
	/**
	 * base64字符串转换成byte[]
	 * @param imgStr		base64字符串
	 * @return
	 *
	 * @author ZHANGJL
	 * @dateTime 2018-02-23 14:42:17
	 */
	public static byte[] Base64Tobyte(String imgStr) { // 对字节数组字符串进行Base64解码并生成图片
 
		if ("".equals(imgStr)) // 图像数据为空
			return new byte[0];
		try {
			// Base64解码
			byte[] b = decoder.decode(imgStr);
			for (int i = 0; i < b.length; ++i) {
				if (b[i] < 0) {// 调整异常数据
					b[i] += 256;
				}
			}
 
			return b;
 
		} catch (Exception e) {
			return null;
		}
 
	}

	/**
	 * byte[]转换成base64字符串
	 * @param data		base64字符串
	 * @return
	 *
	 * @author ZHANGJL
	 * @dateTime 2018-02-23 14:42:17
	 */
	public static String byteToBase64(byte[] data) { // 对字节数组字符串进行Base64解码并生成图片

		return encoder.encodeToString(data);

	}
}