完整Demo
代码语言：javascript复制/**
* 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);
}将图片Base64编码转换成img图片文件
请查看站内文章 ---> 将图片Base64编码转换成img图片文件
