Struts2+Jquery+JSON - some troubles
It seems you took this kind of example.
Try with this 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="false" />
<constant name="struts.devMode" value="true" />
<package name="test" extends="json-default">
<action name="giveMeJsonData" class="test.testAction" method="myFunction">
<result type="json"><param name="root">jsonData</param></result>
</action>
</package>
</struts>
And you have to include the json plugin in /WEB-INF/lib
.
I use a different way.
struts.xml :
<action name="getjson" class="myclass" method="getJson">
<result name="success" type="stream">
<param name="contentType">application/json</param>
<param name="inputName">inputStream</param>
</result>
</action>
Method :
public String getJson() {
String json = "({ 'var1': 'value1', 'var2': 'value2' })";
inputStream = new ByteArrayInputStream(json.getBytes());
return SUCCESS;
}
Update :
I changed the struts.xml. The json-default
package is defined in the plugin.
Update 2 : This setup worked for me.
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="false" />
<constant name="struts.devMode" value="true" />
<package name="TestJson" extends="json-default">
<action name="giveMeJsonData" class="test.testAction" method="myFunction">
<result type="json"><param name="root">jsonData</param></result>
</action>
</package>
</struts>
I had a problem with jsonplugin-0.34 I used struts2-json-plugin-2.1.8.jar instead. But the error I had has nothing to do with yours : It was "java.lang.ClassNotFoundException: com.opensymphony.xwork2.util.TextUtils"
If the example button pop a download window, try this for the jsp page :
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ taglib prefix="sj" uri="/struts-jquery-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<sj:head/>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Json Test</title>
</head>
<body>
<s:div id="my_result" >
<s:property value="jsonData" />
</s:div>
<sj:a targets="my_result" href="giveMeJsonData">Example</sj:a>
</body>
</html>
markzzz
Updated on June 07, 2022Comments
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markzzz almost 2 years
I need to load a part of code dinamically by using Jquery and Json.
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="false" /> <constant name="struts.devMode" value="true" /> <package name="model" extends="struts-default"> <action name="UserManager" class="model.UserManager"> <result>index.jsp</result> </action> </package> <package name="test" extends="json-default"> <action name="giveMeJsonData" class="test.testAction" method="myFunction"> <result type="json"><param name="root">jsonData</param></result> </action> </package> </struts>
this is my testAction class :
package test; import com.opensymphony.xwork2.ActionSupport; import java.util.LinkedHashMap; public class testAction extends ActionSupport { private LinkedHashMap<String, String> jsonData; public LinkedHashMap<String, String> getJsonData() { return jsonData; } public void setJsonData(LinkedHashMap<String, String> jsonData) { this.jsonData = jsonData; } @Override public String execute() throws Exception { return SUCCESS; } public String myFunction() { jsonData = new LinkedHashMap<String, String>(); jsonData.put("My name is", "marco"); return SUCCESS; } }
and i call that method with a submit :
<s:div id="my_result" > <s:property value="jsonData" /> </s:div> <s:form action="giveMeJsonData" theme="simple"> <sj:submit targets="my_result" value="Example" /> </s:form>
Problems :
1 - Unfortunatly, when i try to Run the application, server log (tomcat) says :
Unable to load configuration Error building results for action UserManager in namespace
regarding the line
<action name="UserManager" class="model.UserManager">
, andThere is no result type defined for type 'json' mapped with name 'success'. Did you mean 'json'?
regarding
<result>index.jsp</result>
2 - When i click on Example button, i don't get the Json element.
What am I wrong?
Cheers
UPDATE 1
<package name="json-default" extends="struts-default"> <result-types> <result-type name="json" class="com.googlecode.jsonplugin.JSONResult"/> </result-types> </package> <package name="test" extends="json-default"> <action name="giveMeJsonData" class="test.testAction" method="myFunction"> <result type="json"><param name="root">jsonData</param></result> </action> </package>
UPDATE 2
9-dic-2010 13.49.35 org.apache.catalina.core.StandardContext filterStart GRAVE: Exception starting filter struts2 Unable to load configuration. - action - file:/C:/Users/djfonplaz/Documents/Stage/Struts2/build/web/WEB-INF/classes/struts.xml:11:62 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431) at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: Unable to load configuration. - action - file:/C:/Users/djfonplaz/Documents/Stage/Struts2/build/web/WEB-INF/classes/struts.xml:11:62 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418) ... 29 more Caused by: Error building results for action UserManager in namespace - action - file:/C:/Users/djfonplaz/Documents/Stage/Struts2/build/web/WEB-INF/classes/struts.xml:11:62 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:367) at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:468) at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264) at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55) ... 31 more Caused by: There is no result type defined for type 'json' mapped with name 'success'. Did you mean 'json'? - result - file:/C:/Users/djfonplaz/Documents/Stage/Struts2/build/web/WEB-INF/classes/struts.xml:12:35 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.buildResults(XmlConfigurationProvider.java:621) at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:365) ... 36 more 9-dic-2010 13.50.23 org.apache.catalina.core.StandardContext filterStart GRAVE: Exception starting filter struts2 Unable to load configuration. - action - file:/C:/Users/djfonplaz/Documents/Stage/Struts2/build/web/WEB-INF/classes/struts.xml:11:62 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431) at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:521) at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1359) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:297) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761) at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1500) at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:849) at org.apache.catalina.manager.ManagerServlet.doGet(ManagerServlet.java:351) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:199) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:558) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555) at java.lang.Thread.run(Thread.java:619) Caused by: Unable to load configuration. - action - file:/C:/Users/djfonplaz/Documents/Stage/Struts2/build/web/WEB-INF/classes/struts.xml:11:62 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418) ... 41 more
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codea over 13 yearsI think 'struts-default' already exist(it's built-in in struts2) but 'json-default' doesn't exist, this is why you have to define it.
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markzzz over 13 yearsUhm, maybe i know what do you mean. I've add to the topic the struts.xml version, but I still have the same problem...
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codea over 13 yearsWhat is 'UserManager' for ? Maybe you can get rid of this to focus on the 'giveMeJsonData' part.
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markzzz over 13 yearsOk, removed :) So we can focus only to this problem. Now it doesnt built the struts.xml... :(
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markzzz over 13 yearsNothing! Still doesnt work. There are many errors. If you want i could post the whole error informations...
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markzzz over 13 yearsNice one, added some lines of error (not all, i can't here :))
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markzzz over 13 yearsIm using Struts2 2.1.8, jsonplugin-0.34.rar and xwork-core-2.1.5.rar Maybe a conflicts of these libs? (i read somethings about this last day). Argh...
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codea over 13 yearsI don't think it's a libs conflict ... The problem seems to be on line 11 of struts.xml. Did you copy/paste the struts.xml from my answer because UserManager is not supposed to appears ?
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markzzz over 13 yearsyes. And i get
FAIL - Deployed application at context path /Struts2 but context failed to start C:\Users\djfonplaz\Documents\Stage\Struts2\nbproject\build-impl.xml:694: The module has not been deployed.
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markzzz over 13 yearsStrange things : if i write
package name="model"
it runs (with many errors, ok). If i writepackage name="json-default"
i seeThe module has not been deployed
message. Uhm.... -
markzzz over 13 yearsProblems is that Tomcat doesnt get the actual .xml files. I need to fix this problems now. I try with Clean+Build and restart from netbeans, but it get old struts.xml...don't know why argh
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codea over 13 yearsThis is another story ... try to copy/paste 'struts.xml' to 'C:/Users/djfonplaz/Documents/Stage/Struts2/build/web/WEB-INF/classes/'. I use eclipse.
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markzzz over 13 yearsThe code you posted works. Now i don't understand why this works, and the other no. And also because on Apache Tomcat Log it still show to me Tons of errors :)
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markzzz over 13 yearsUhmn. In fact,by using sj:a targets="my_result" href="giveMeJsonData" the older version works too. Its just with Submit that it doesnt works. Why? P.S. i used struts2-json-plugin-2.1.8 too, jsonplugin-0.34 give to me the same problems with java.lang.ClassNotFoundException. By using this plugins, the json-default type is already defined right? So i use it directly. Damn there isnt a decent tutorial online for these kind of things