value = ""问题
<input type = "text " name = "textname " value = " "> <br>

里面value = " "里面放变量是什么格式的呢?

String str = " "


比如 value = "+str " 可以吗?

[解决办法]
<%
String str = "12312 ";
%>

<input type = "text " name = "textname " value = <%=str%> > <br>

一个是jsp
1个是html