我的拦截器没有从操作页面到ftl取值 [英] My interceptors are not fetching values from from action page to ftl
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问题描述
我是Struts2的新手.我找不到为什么我的ftl无法从操作页面获取值的问题.这是我的ftl代码:
I am new to Struts2. I am not able to find the issue that why my ftl couldn't fetch values from action page. This is my ftl code :
<html>
<head></head>
<body>
<#assign temp = 12311>
<h4>hello world : ${FirstAction?if_exists.random} #{temp}</h4>
</body>
</html>
这是我的struts.xml:
This is my struts.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation"
value="true" />
<constant name="struts.devMode" value="true" />
<package name="default" extends="struts-default">
<action name="getTutorial" class="MyActions.FirstAction" >
<result name="success">/success.jsp</result>
<result name="failure">/error.jsp</result>
</action>
<action name="submit" class="MyActions.FirstAction" method="submit"></action>
<action name="callme" class="MyActions.FirstAction" method="myMethod">
<result name="success">/FreeMarkerPages/testingAction.jsp</result>
<result name="failure" type="freemarker">/FreeMarkerPages/FirstFTL.ftl</result>
</action>
</package>
</struts>
这是我的动作课:包MyActions;
This is my action class: package MyActions;
import java.util.Random;
import java.util.Random;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ActionSupport;
导入服务.ColorPicker;
import service.ColorPicker;
public class FirstAction extends ActionSupport{
private int random;
public String execute() {
return "failure";
}
public String myMethod(){
setRandom(9999);
System.out.println("My method "+random);
return "failure";
}
public String submit(){
System.out.println(random);
return null;
}
public int getRandom() {
return random;
}
public void setRandom(int random) {
this.random = random;
}
}
这是我的FTL错误:
FreeMarker template error (HTML_DEBUG mode; use RETHROW in production!)
The following has evaluated to null or missing:
==> FirstAction?if_exists.random [in template "FreeMarkerPages/FirstFTL.ftl" at line 5, column 22]
推荐答案
愚蠢的错误.我应该写 $ {random?if_exists} ，而不是写 $ {FirstAction?if_exists.random} .
Stupid mistake. Instead of writing ${FirstAction?if_exists.random} i should have written ${random?if_exists}.
这不是静态类.
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