java 通过流的方式读取远程图片并显示在jsp页面(类型以jpg、png等结尾的图片)

Java 代码：

String path = "http://61.148.200.38:16980/project/1GS/DNA_online/map/";
URL url;
try {
url = new URL(path+"1-ref.png");
HttpURLConnection urlconn = (HttpURLConnection) url.openConnection();
String messagePic = urlconn.getHeaderField(0);//文件存在‘HTTP/1.1 200 OK’ 文件不存在 ‘HTTP/1.1 404 Not Found’
if (messagePic.startsWith("HTTP/1.1 200")) {
InputStream is = url.openStream();
int i = is.available(); // 得到文件大小
byte[] buffer = new byte[i];
is.read(buffer); // 读数据
is.close();
response.setContentType("image/*"); // 设置返回的文件类型
OutputStream toClient = response.getOutputStream(); // 得到向客户端输出二进制数据的对象
toClient.write(buffer); // 输出数据
toClient.close();
}
} catch (Exception e) {
e.printStackTrace();
}

jsp 页面代码：

<img id="mutationImage" style="height:150px;width:750px;" src="${pageContext.request.contextPath}/two-check/validate-order-mutation/seeChrom.action?chromId=${request.chromId}&t=<s:property value='verifyResultNote'/>"/>t=<s:property value='verifyResultNote'/>表示时间戳