无法将Struts2结果类型设置为json [英] can't set Struts2 result type to json

问题描述

我想在Struts2中使用json.但是，当我将操作返回类型设置为"json"时，得到没有为映射为名称'success'的'json'类型定义任何结果类型".波纹管是struts.xml文件.

I want to use json with Struts2. However, when I set the action return type to "json", I got "there is no result type defined for type 'json' mapped with name 'success'." Bellow is struts.xml file.

<?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.custom.i18n.resources" value="resource"/>

    <package extends="struts-default" name="test">
        <action name="inputHandler" class="inputHandlerAction">
            <result name="input">/index.jsp</result>
            <result>/result.jsp</result>
        </action>
        <action name="setLangHandler" class="com.sesoft.test.setLanguageHandler">
            <result>/index.jsp</result>
        </action>

        <action name="Handler" class="com.sesoft.test.Handler">
            <result>/test2.jsp</result>
        </action>   
    </package>

    <package name="example" extends="json-default">

        <action name="ajaxHandler" class="com.sesoft.test.AjaxHandler">
            <result name="success" type="json" />
        </action>

    </package>
</struts>

在添加json动作之前，所有其他动作均能正常运行.但是在添加json Action之后，服务器无法操作，错误代码为503.

Before I added the json Action, all other action performs fine. But after I added the json Action, the server failed to action with error code 503.

库我已将"jsonplugin-0.33.jar"添加到库目录.

libs I've added "jsonplugin-0.33.jar" to the lib directory.

推荐答案

您没有在struts.xml包中定义JSON结果.如果只需要默认值，则可以扩展json-default而不是struts-default.如果您需要自定义程序包，则请包含以下内容并可以解决问题:

You don't have the JSON result defined in your struts.xml package. If you only need default things then you can just extend json-default instead of struts-default. If you need to customise the package then include the following and that should do the trick:

    <result-types>
        <result-type name="json" class="com.googlecode.jsonplugin.JSONResult"/>
    </result-types>

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