无法将 Struts2 结果类型设置为 json
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can't set Struts2 result type to json
提问by Sefler
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.
我想在 Struts2 中使用 json。但是,当我将操作返回类型设置为“json”时,我得到“没有为名称为‘success’映射的‘json’类型定义的结果类型。” 下面是 struts.xml 文件。
<?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>
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.
在我添加 json 操作之前,所有其他操作都可以正常执行。但是在我添加了 json Action 后,服务器无法操作,错误代码为 503。
libs I've added "jsonplugin-0.33.jar" to the lib directory.
libs 我已将“jsonplugin-0.33.jar”添加到 lib 目录中。
回答by Peter Kelley
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:
您没有在 struts.xml 包中定义 JSON 结果。如果你只需要默认的东西,那么你可以扩展 json-default 而不是 struts-default。如果您需要自定义包,请包含以下内容,这应该可以解决问题:
<result-types>
<result-type name="json" class="com.googlecode.jsonplugin.JSONResult"/>
</result-types>
回答by lich0079
you package should extends json-default
你的包应该扩展 json-default
<package name="json-default" extends="struts-default">
<result-types>
<result-type name="json" class="org.apache.struts2.json.JSONResult"/>
</result-types>
<interceptors>
<interceptor name="json" class="org.apache.struts2.json.JSONInterceptor"/>
</interceptors>
</package>
回答by Eduardo Martín Vega
Here is my configuration in pom.xml:
这是我的配置pom.xml:
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.3.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-json-plugin</artifactId>
<version>2.3.1.2</version>
</dependency>
In the action result you only need to specify type="json":
在操作结果中,您只需要指定type="json":
<result type="json"/>
Remember the variable getter and setter in type="json"response give getters in the action.
记住变量 getter 和 settertype="json"响应在动作中给出 getter。
回答by Maxx Selva K
Include json-defaultin the extendsparameter:
包含json-default在extends参数中:
<package name="default" extends="struts-default,json-default">
<action>
...
...
</action>
</package>
回答by rado
If using Maven you may need to add the dependency e.g.
如果使用 Maven,您可能需要添加依赖项,例如
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-json-plugin</artifactId>
<version>2.2.3</version>
</dependency>

