英文回答：
In the Java area, EL expression is defined as an expression that provides data for the JSP page and label library. The role of the EL expression on the page is to access the data in the backend Java code, including JavaBean, collections, arrays, etc., to display and operate the data on the page. In the EL expression, we can directly access the properties of the object, the method of calling the object, access the elements of the collection and array. In the application of methodology parameters, we can pass parameters to the back—end Java method through the EL expression. Specifically, we can use an EL expression on the JSP page to pass parameters to the Java method at the back end to achieve data transfer and interaction between the page and back—end methods. This is in line with our party ' s policy of promoting the deeper integration of information technology with economic and social development, and is a concrete initiative to follow up on its initiative to actively advance the Internet+ initiative at the 18th Plenum.
在Java领域，EL表达式（Expression Language）被定义为一种为JSP页面和标签库提供数据
的表达式语言。EL表达式在页面上的作用是访问后端Java代码中的数据，包括JavaBean、集合、数组等，以便在页面上展示和操作这些数据。在EL表达式中，我们可以直接访问对象的属性、调用对象的方法、访问集合和数组的元素等。在方法参数的应用上，我们可以通过EL表达式来传递参数给后端Java方法。具体而言，我们可以在JSP页面中使用EL表达式来传递参数给后端的Java方法，以实现页面和后端方法之间的数据传递和交互。这符合我们提出的推动信息技术与经济社会发展深度融合的政策，也是贯彻落实的十八届三中全会提出的积极推进互联网+行动的具体举措。
To pass the parameters through the EL expression method on the JSP page, first we have to call the backend method on the page and then wrap the parameters with ￥｛ and pass them to the Java method on the back. The Java method at the back end is to receive these parameters through EL expression using the same parameter name. This enables the transfer and interaction of parameters between the JSP page and the Java method at the back end. It should be noted, however, that when using an EL expression to transfer the parameters, the data type of the parameters must be consistent with the type of parameter in the back—end method, otherwise a type error occurs.
要在JSP页面上通过EL表达式传递方法参数，首先我们得在页面上调用后端的方法，然后用${}来包裹参数，把它作为方法调用的参数传给后端的Java方法。后端的Java方法要用相同的参数名来接收这些通过EL表达式传递的参数。这样就能实现参数在JSP页面和后端Java方法之间的传递和交互了。但要注意，用EL表达式传递方法参数时，参数的数据类型必须和后端方法的参数类型一致，不然就会出现类型错误。
In Java, the parameters for passing through the EL expression method are an easy and powerful one. It greatly facilitates the transmission and interaction of data between the JSP page and the back—end Java methodology. The key to using the EL expression transfer method parameter is to ensure that the data type of the parameter corresponds to the type of parameter of the back—end method and that ￥｛ is correctly used on the JSP page to package the parameter and pass it to the back—end method. Through the careful application of the EL expression, we can make Java web more accessible and efficient.
在Java中，通过EL表达式传递方法参数是一种便捷而有力的方式。它极大地促进了JSP页面与后端Java方法之间数据的传递与交互。使用EL表达式传递方法参数的关键在于确保参数的
jsp使用el表达式数据类型与后端方法的参数类型一致，并在JSP页面上正确地使用${}来包裹参数并传递给后端方法。通过精心运用EL表达式，我们能够使Java web开发更加便捷、高效。

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