java 将if-else与html一起使用时出现jsp错误
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时间：2020-10-29 15:44:46 来源:igfitidea点击:
jsp error when using if-else with html
提问by vehomzzz
I have the following in my jsp page (assume that client is an object )
我的jsp页面中有以下内容（假设客户端是一个对象）
<%
if( client == null)
%>
NO client
<%
else
%>
<a href='page.jsp?aid=<%=client.getID()%>'> and his name is <%=client.getName()%>
thanks
谢谢
回答by ChssPly76
You're missing the brackets:
你缺少括号：
<% if( client == null) { %>
NO client
<% } else { %>
<a href='page.jsp?aid=<%=client.getID()%>'> and his name is <%=client.getName()%>
<% } %>
That said, this is an example of bad JSP code. Consider using JSTL tags / expressions instead of scriptlets.
也就是说，这是一个糟糕的 JSP 代码示例。考虑使用 JSTL 标记/表达式而不是 scriptlet。
回答by Peter
in jstl it would be something similar to
在jstl中它会类似于
<c:choose>
<c:when test="${client is null}">
NO client
</c:when>
<c:otherwise>
<A href="<c:url value="page.jsp" >
<c:param name="aid" value="${client.ID}" />
</c:url>"
> and his name is <c:out value="${client.name}"/>
</c:otherwise>
