Question

这是如此基本我不敢相信我已经花了整整一天。

好的，这是我的freemarker页面

    bla bla bla
<form name="message" action="[@s.url action="login"/]" onsubmit="return detectJavaScript();" method="post">
    <fieldset>
        <legend>To begin, type your Graduation Report ID and password</legend>
        <ol>
            <li>
                [@requiredInstruction /]
                <label for="username" accesskey="U">
                    [@requiredField /] <strong>Graduation Report ID:</strong>
                </label>
                <input id="username" name="username" size="10" tabindex="1" type="text" value="${username!''}"
                    [@errorStyle show=(fieldErrors?exists && fieldErrors["username"]?exists)/] />
                [@showFieldError field="username" /]
            </li>
            <li>
                <label for="password" accesskey="P">
                    [@requiredField /] <strong>Password:</strong>
                </label>
                <input id="password" name="password" size="10" tabindex="2" type="password" value="${password!''}" 
                    [@errorStyle show=(fieldErrors?exists && fieldErrors["password"]?exists)/] />
                [@showFieldError field="password" /]
            </li>
bla bla bla

和我的动作类

public class SubmitLoginAction {
    public String username;
    public String password;


    private static Logger logger = Logger.getLogger(SubmitLoginAction.class);

    public void validate() {
        logger.debug("validate fired");

        logger.debug("username returned: " + username);
        logger.debug("password returned: " + password);

和我的struts文件

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <!-- <include file="com/paritysys/util/struts.xml" /> -->

    <constant name="struts.url.includeParams" value="none" />
    <constant name="struts.action.extension" value="html,action" />

    <package name="public" extends="struts-default">
        <interceptors>
            <interceptor name="websiteOnline"
                class="parity.action.website.OnlineInterceptor" />
            <interceptor name="websiteLogin"
                class="parity.action.website.LoginInterceptor" />

            <interceptor-stack name="appStack">
                <interceptor-ref name="validation">
                    <param name="excludeMethods">input,back,cancel,browse</param>
                </interceptor-ref>
                <interceptor-ref name="workflow"/>
                <interceptor-ref name="modelDriven"/>
                <!-- <interceptor-ref name="paritySessionStack"/> -->
                <interceptor-ref name="websiteOnline" />
                <interceptor-ref name="websiteLogin" />
            </interceptor-stack>
        </interceptors>

        <default-interceptor-ref name="appStack" />

        <global-results>
            <result name="login" type="redirectAction">
                <param name="actionName">index</param>
            </result>
            <result name="exception" type="freemarker">/public/error.html.ftl</result>
            <result name="error" type="freemarker">/public/error.html.ftl</result>
            <result type="freemarker" name="maintenance">/public/maintenance.html
            </result>
            <result type="freemarker" name="pre-offline">/public/pre-offline.html
            </result>
            <result type="freemarker" name="post-offline">/public/post-offline.html
            </result>
        </global-results>

        <action name="index" class="parity.action.website.LoginAction">
            <result type="freemarker" name="success">/public/index.html.ftl</result>
        </action>

        <action name="login" class="parity.action.website.SubmitLoginAction">
            <result type="freemarker" name="success">/public/questionnaire.html.ftl
            </result>
            <result type="freemarker" name="input">/public/index.html.ftl</result>
        </action>

        <action name="submit" class="parity.action.website.SubmitQuestionnaireAction">
            <result type="freemarker" name="success">/public/thanks.html.ftl
            </result>
            <result type="freemarker" name="input">/public/questionnaire.html.ftl
            </result>
        </action>

        <action name="whereIsMyId" class="parity.action.website.LoginAction">
            <result type="freemarker" name="success">/public/whereIsMyId.html.ftl
            </result>
        </action>

        <action name="loadCollegeFinder" class="parity.action.website.LoadCollegeFinderAction">
            <result type="freemarker" name="success">/public/college_finder.html.ftl
            </result>
        </action>

        <action name="findCollege" class="parity.action.website.FindCollegeAction">
            <result type="freemarker" name="success">/public/college_finder.html.ftl
            </result>
            <result type="freemarker" name="input">/public/college_finder.html.ftl
            </result>
        </action>
    </package>
</struts>

无论我做什么，它都会为用户返回null并传递。香港专业教育学院尝试过getter和setter，没有，似乎没什么用。

我认为这是struts开箱即用的东西。

Answer 1

确实如此，但是你已经把它从盒子中取出来并随意移动它。

您已从默认拦截器堆栈中删除了“params”拦截器。 “params”拦截器用于设置动作的参数。我在my answer to your previous post中提到过。

（同时不需要继续输入“freemarker”。）

（旁注，我真的不推荐公共属性，虽然它会起作用，这取决于你的Struts版本 - IIRC其中一个OGNL版本更改了。）

Struts2 freemarker没有提交表单字段

1 个答案: