English Title:Weblogic 10 leaves the problem of JSP El and Ognl and means of settlement
在使用Webwork或Struts2標簽寫JSP時，經常會用到如下寫法： <ww:radio name="gender" list='#{"1":"Male", "2":"FeMale"}' /> <ww:select name="yes" list='#{"1":"YES","2":"NO"}' /> 這是ognl的寫法，list里的表達式將解釋成成一個Map，實際上是一個LinkedHashMap。 ? 這種寫法在Tomat下部署是沒有任何問題的，但部署到Weblogic 10下問題就來了，這里web.xml的version聲明為2.4，編譯JSP時報表達式錯誤。如果聲明為2.3是不會報錯的，因為servlet 2.3(即jsp 1.2)是不支持EL的，使用Weblogic 9同樣也不會報錯。據此可以推測原因為編譯JSP時Weblogic? JSP編譯器將OGNL的表達式誤認為是EL表達式。 ? ?解決辦法： 1、禁用EL。在web.xml上加上 <jsp-config> <jsp-property-group> <url-pattern>*.jsp</url-pattern> <el-ignored>true</el-ignored> </jsp-property-group> </jsp-config> ?2、更改web.xml的version為2.3。 ?3、因為大量頁面用到EL，如${someValue}，所以1和2基本行不通的，所以從OGNL的表達式入手，最終寫成 list='#@java.util.LinkedHashMap@{"1":"Male","2":"FeMale"}'?, 顯式指定使用LinkedHashMap來構建Map。問題解決。
==========English==========
When use Webwork or Struts2 label write JSP, classics regular meeting uses a method: <ww:rAdio Name="gender" List='#{"1" :" Male" , "2" :" FeMale"}' /><ww:sElect Name="yes" List='#{"1" :" YES" , "2" :" NO"}' />This is Ognl write a law, the expression in List becomes the explanation a Map, it is a LinkedHashMap actually. ? This kind writes a law to issue deploy in Tomat do not have any problems, but deploy came to the problem below Weblogic 10, the Version statement of Web.xml is here 2.4, compile mistake of JSP times expression. If statement is 2.3 be to won't sign up for a fault, because of Servlet 2.3(namely Jsp 1.2) does not support EL, use Weblogic 9 also won't sign up for a fault likewise. Can you figure the reason is the Weblogic when compiling JSP accordingly? JSP is compiled implement consider as the expression of OGNL EL expression by accident. ? ? Settle way: 1, ban with EL. <jsp-config is added on Web.xml><jsp-property-group><url-pattern>*.jsp</url-pattern><el-ignored>true</el-ignored></jsp-property-group></jsp-config>? 2, the Version that changes Web.xml is 2.3. ? 3, use EL because of a large number of pages, be like ${someValue} , so 1 and 2 won't do basically, so the expression proceed with from OGNL, write finally into List='#@java.util.LinkedHashMap@{"1" :" Male" , "2" :" FeMale"}' ? , explicit appoint use LinkedHashMap to come compose builds Map. Ask the problem is solved.