Java 关于获取 BufferedImage 对象的 Bytes 效率问题

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代码及运行结果：
log4j.info(System.currentTimeMillis()); //1427811014567
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
log4j.info(System.currentTimeMillis()); //1427811014567
ImageIO.write(payOrderImg, "jpg", byteArrayOutputStream);
log4j.info(System.currentTimeMillis()); //1427811014578
imgBytes = byteArrayOutputStream.toByteArray();
log4j.info(System.currentTimeMillis()); //1427811014578

ImageIO.write(RenderedImage im,
String formatName,
OutputStream output) 数据量在20k，耗时11毫秒，速度太慢啦，请大神分析为何会这么慢，另请分享下解决方案

log4j.info

解决方案

imgbytes

3 replies • 2015-04-01 10:01:36 +08:00

wohenyingyu01

Apr 1, 2015

为什么要自己控制流，直接用bufferedimage类不好么，当时我50毫秒一帧都不卡

hao123yinlong

Apr 1, 2015

@wohenyingyu01 我需要获取到图片的byte[]

hao123yinlong

Apr 1, 2015

@wohenyingyu01 人眼是24帧呃。。你20帧会感觉到不流畅的