ImageUtils.java
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package com.webank.utils;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class ImageUtils {
/*
* 通过图片的url获取图片的base64字符串
*
* @param imgUrl 图片url
*
* @return 返回图片base64的字符串
*/
public static String image2Base64(String imgUrl) {
URL url = null;
InputStream is = null;
ByteArrayOutputStream outStream = null;
HttpURLConnection httpUrl = null;
try {
url = new URL(imgUrl);
httpUrl = (HttpURLConnection) url.openConnection();
httpUrl.connect();
httpUrl.getInputStream();
is = httpUrl.getInputStream();
outStream = new ByteArrayOutputStream();
// 创建一个Buffer字符串
byte[] buffer = new byte[1024];
// 每次读取的字符串长度，如果为-1，代表全部读取完毕
int len = 0;
// 使用一个输入流从buffer里把数据读取出来
while ((len = is.read(buffer)) != -1) {
// 用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
outStream.write(buffer, 0, len);
}
// 对字节数组Base64编码
return Base64Util.encode(outStream.toByteArray());
} catch (Exception e) {
e.printStackTrace();
}
finally {
if (is != null)
{
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (outStream != null)
{
try {
outStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (httpUrl != null)
{
httpUrl.disconnect();
}
}
return imgUrl;
}
}