The EL retrieves data from the JSP container, traverses object hierarchies, and performs simple operations on the results.

el从jsp容器检索数据，遍历对象层次结构，然后对结果执行简单的操作。

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Because the el can be used in place of JSP expressions to specify dynamic attribute values, it reduces the need for page authors to use scripting elements.

由于可以用el替代JSP表达式来指定动态属性值，因此页面创作人员无需使用脚本编制元素。

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JSTL 1.2 is a maintenance release that supports the unified el and resolves issues that used to arise from trying to mix JSF tags and JSTL iteration tags in the same JSP page.

JSTL 1.2是一个维护版本，它支持统一el并解决了在同一个jsp页面中混用JSF标记和JSTL迭代标记时遇到的问题。

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