实例化jsp scriptlet之间的类 [英] Instantiating classes between jsp scriptlets

问题描述

是否可以实例化一个类，然后在JSP中的scriptlet之间调用它的方法? 我遇到错误，我不知道为什么(java类和方法很好). 还有其他方法可以做到这一点(我只想从类中的方法中获得一个字符串)?

Is it possible to instantiate a class and then invoke its methods between scriptlets in JSP? I am getting errors and I don't know why (java class and methods are fine). Any other way to do the same (i just want a string from a method in a class)?

推荐答案

当然可以.您可以像这样为类创建对象，并在JSP的scriptlet之间访问它们的方法.

Yes of-course. You can create objects for your classes and access their methods between scriptlets in JSP like this.

<%
     Foo foo = new Foo();
     foo.method1();
%>

另一种方法是使用jsp的useBeans实例化类并在scriptlet中访问其方法

Another way of doing this is using useBeans of jsp to instantiate the class and access its method in scriptlet

<jsp:useBean id = "foo" class = "Foo" />
<%
     foo.method1();
%>

这篇关于实例化jsp scriptlet之间的类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！