jsp quoted with " which must be escaped when used within the value

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本文详细介绍了在使用Apache Tomcat7.0部署JSP应用时，遇到单引号导致的JSP参数传递错误，并提供了解决方案。通过将参数值改为双引号或正确使用`<%=...%>`表达式，可以避免出现错误信息，确保应用正常运行。

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因为 value='<%=request.getParameter("numItems")%>' />中的单引号问题

我使用apache-tomcat 7.0 中使用会出现这种错误。

org.apache.jasper.JasperException: java.lang.IllegalArgumentException

<jsp:setProperty property="itemID" name="sale" param="itemID"/>
	
	<%-- 上面的方法使用下面的方法会出现错误，所以尽量不要使用 ： --%>


	<jsp:setProperty property="numItems" name="sale"
		value='<%=request.getParameter("numItems")%>' />

而如果不进行修改直接使用

value="<%=request.getParameter("numItems")%>" />

就会出现

Attribute value request.getParameter("numItems") is quoted with " which must be escaped when used within the value

这种问题，没办法上网搜索，一些解决方法也没用，只用换另外一种写法了。

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