package com.ruoyi.web.controller.tool;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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/**
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* @author zhy
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* @title: HttpClientUtil
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* @projectName car_park
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* @description: http连接工具类
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* @date 2019/10/2219:23
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*/
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public class HttpClientUtil {
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/**
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* @param strUrl
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* @return byte[]
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* @throws
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* @description: 获取网络图片转成字节流
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* @author zhy
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* @date 2019/10/23 8:59
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*/
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public static byte[] getImageFromNetByUrl(String strUrl) {
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if (!isURL(strUrl)){
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return null;
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}
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try {
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URL url = new URL(strUrl);
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HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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conn.setRequestMethod("GET");
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conn.setConnectTimeout(2 * 1000);
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InputStream inStream = conn.getInputStream();// 通过输入流获取图片数据
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byte[] btImg = readInputStream(inStream);// 得到图片的二进制数据
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return btImg;
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 从输入流中获取字节流数据
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*
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* @param inStream 输入流
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* @return
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* @throws Exception
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*/
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public static byte[] readInputStream(InputStream inStream) throws Exception {
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ByteArrayOutputStream outStream = new ByteArrayOutputStream();
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byte[] buffer = new byte[10240];
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int len = 0;
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while ((len = inStream.read(buffer)) != -1) {
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outStream.write(buffer, 0, len);
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}
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inStream.close();
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return outStream.toByteArray();
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}
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public static boolean isURL(String str) {
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str = str.toLowerCase();
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String regex = "^((https|http|ftp|rtsp|mms)?://)"
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+ "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?"
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+ "(([0-9]{1,3}\\.){3}[0-9]{1,3}"
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+ "|"
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+ "([0-9a-z_!~*'()-]+\\.)*"
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+ "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\\."
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+ "[a-z]{2,6})"
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+ "(:[0-9]{1,5})?"
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+ "((/?)|"
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+ "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";
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return str.matches(regex);
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}
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}
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