看不出到底是什么原因，请高手帮忙分析一下，报错日志和源文件如下：
HTTP Status 500 -
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type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: javax.el.PropertyNotFoundException: Property 'id' not found on type java.lang.String
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
dao.UserM.doPost(UserM.java:30)
dao.UserM.doGet(UserM.java:22)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.el.PropertyNotFoundException: Property 'id' not found on type java.lang.String
javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:193)
javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:170)
javax.el.BeanELResolver.property(BeanELResolver.java:279)
ja
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 52 in the jsp file: /vip_info.jsp
ÕË cannot be resolved
49: <table border="1& ......
最近一个项目中遇到一个问题：在原有的一套系统中(php开发)添加一些小功能(jsp开发)，原来用户系统都是php开发的，我如何在jsp开发的功能中做到用户信息session同步呢？ 有人是否有做过类以项目，想听听大家的看法
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