如何从另一个servlet传递ArrayList? [英] How can I pass an ArrayList from one servlet another?

问题描述

我已经将arraylist1从一个servlet发送到了另一个.有用.现在，我想将arraylist2传递给另一个jsp/servlet，但是出现错误:java.util.nullPointer Exception.我该如何解决?

I have already sent arraylist1 from one servlet to another. It works. Now I want to pass arraylist2 to another jsp/servlet, but I get an error: java.util.nullPointer Exception. How can I resolve this?

推荐答案

RequestDispatcher disp2 = request.getRequestDispatcher("NewServlet.java"); 

应该是

RequestDispatcher disp2 = request.getRequestDispatcher(pathToYourServlet); 

路径是页面地址的结尾: http://localhost/yourApp/ pathToYourServlet

The path is the end of the page adress: http://localhost/yourApp/pathToYourServlet

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