原文:http://www.2cto.com/kf/201209/156169.html 前端的代码: [javascript] function drawArrow(angle) { //Init canvas var canvas = $('#cv_Arrow')[0]; var context = canvas.getContext('2d'); var width = canvas.width; var height = canvas…
js var url = canvas.toDataURL();//把canvas中的图片变成data:image C# string filepath = ""; string imgData = Request["url"].ToString(); var date = DateTime.Now.ToString("yyyyMMddmsms"); if (imgData.StartsWith("data:image/png;base…
关于虚拟机栈和本地方法栈,在JVM规范中描述了两种异常: 1.如果线程请求的栈深度大于JVM所允许的深度,将抛出StackOverflowError异常: 2.如果虚拟机在扩展栈时无法申请到足够的内存,就会抛出OutOfMemoryError异常. 下面进行虚拟机栈和本地方法栈的SOF异常测试: public class JavaVMStackSOF { private int stackLenth = 1; public void stackLeak() { stackLenth++; sta…