JSTL标签出错：c:forEach var=book items=${requestScope.books} varStatus=status

今天在运行书里的JSTL标签代码的时候出错，总结一下：

问题1.The JSP specification requires that an attribute name is preceded by whitespace 

解决：<c:forEach var="book" items="${requestScope.books}"varStatus="status">出错

改为：<c:forEach var="book" items="${requestScope.books}" varStatus="status">

原因：varStatus="status"前加空格

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问题2.Property 'isbn' not found on type java.lang.String

解决：<c:forEach var="book" items=" ${requestScope.books}" varStatus="status">出错

改为：<c:forEach var="book" items="${requestScope.books}" varStatus="status">

原因：${requestScope.books}前去掉空格

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问题3.程序能运行了,jsp能访问，但是EL表达式读取不到想要的信息   

解决：没有在.无法调用servlet向jsp传对象。

在.

<servlet>  <servlet-name>BooksServlet</servlet-name>  <servlet-class>com.controller.BooksServlet</servlet-class></servlet><servlet-mapping>  <servlet-name>BooksServlet</servlet-name>  <url-pattern>/BooksServlet</url-pattern></servlet-mapping>

原标题：JSTL标签出错：c:forEach var=book items=${requestScope.books} varStatus=status

关键词：JS