<%
Context ctx = WebContextUtil.getEasContext(request) ;
String height = "480";
String source = "";
if( null != request.getParameter("source") )
source = (String)request.getParameter("source");
%>如何在这段代码中把变量source提示出来?提示的语法是什么?
Context ctx = WebContextUtil.getEasContext(request) ;
String height = "480";
String source = "";
if( null != request.getParameter("source") )
source = (String)request.getParameter("source");
%>如何在这段代码中把变量source提示出来?提示的语法是什么?
<%=source%>
都可以
out.println(source);
这种方式怎么在页面上看不到任何提示呢?
if( null != request.getParameter("source") )
source = (String)request.getParameter("source");
你这里source本来就是空字符串, 只有if条件满足了 才从request中取值出来赋给source
当然你打印的就是空字符串了 - -~!