Struts2json plugin not serializing action class to json. This tutorial explains you about the interceptors in struts 2. Dispatcher result, used for web resource integration, including jsp integration. It took a decent amount of time to figure out how to set up struts 2 with json. Working with struts 2 tiles, struts 2 tiles example. For example, passing request params to action classes, making servlet api request, response, session available to action classes, validation, i18n support etc.
If form field validation fails then input result is returned where we are returning the same page from where we get the request. We can define our rules of validation in xml file and use in jsp field. Basically, struts provides you with a few result types. But a dispatcher will map a page, generally jsp, not another action. All one has to do is to define result type freemarker.
We saw the shorthand version in our earlier examples. In order to display validation messages, i am using interceptor where validation messages are will be stored in session and the same will be. Additional result types can be created and plugged into an application by implementing the com. Struts 2 tiles framework integration tutorial example. Following are the types of result types and result tag will be kept in struts.
Custom result types might include generating an email or jms message, generating images, and so forth. The dispatcher result is used to include or forward to a target view page jsp. Struts 2 framework provides a good list of outofthebox interceptors that come preconfigured and ready to use. Result types apache struts 2 wiki apache software foundation. Struts comes with a number of predefined result types and whatever weve already seen that was the default result type dispatcher, which is used to. Jul 01, 2010 hope this super simple example can give you an overall idea of how json plugin worked with struts 2.
The dispatcher, freemaker and redirect are the commonly used result types. Used to forward to a servlet, jsp, html page, and so on, on the server. It uses requestdispatcher interface to achieve it, where the target server or jsp receive the same request and response either using forward or include method. Another json result typestruts2jsonresult apache struts 2. Struts also allow the user to use other mark up languages for the view technology to display the results and popular choices include velocity, freemaker, xslt and tiles. The dispatcher result type apache struts 2 web application. Alternative for struts result typedispatcher in struts2. Need your help in dispatching an action from struts. As when request come business logic is executed first and after that result is to display as view. However, there are still many useful settings are not cover here, make sure you read the struts 2 json plugin documentation for more details. And invokeaction of defaultactioninvocation will fail in line 450. So when youre under pressure to get something working and not overly familiar with struts2 then use chain or redirection, and then definitely come back and fix it. Please help me if anyone have faced similar kind of problem if i use type dispatcher in result tag, the action is not dispatched to the specified action. I am wondering what is the best result type i should choose.
Intercept function of chaininginterceptor will change action member of defaultactioninvocation class. For json, you will require a new result type, because, obviously, since the response is a json response, you dont have. Struts2 ognl is the expression language where ognl stands for objectgraph navigation language. A global result is not tied to one or more interceptors or actions. Working with struts 2 tiles, struts 2 tiles example struts. Create custom interceptor that checks whether current request is ajax or not and return.
By default, the framework uses a result type which works withjsps to render the response pages. Struts provide a number of predefined result types. Then if you need to return another action, you need to use redirect a ction result. A full struts 2 example to create multiple check boxes with a same name via, stored the checked values and display it in another page. To achieve it we need to define result type as json. This tutorial also discusses about the struts 2 default interceptor and lists the code of struts default. Strutsprepareandexecutefilter introduced from the struts 2. There is a problem using this plugin and the result type tiles. Its used to forward to a servlet, jsp, html page, and so on, on the. For some strange reason there are numerous messages like the following. Each package may set a default result type to be used if none is specified in a result element. A web page can contain many parts known as tile such as header, left pane, right pane, body part, footer etc. Result interface, ready to use in your own applications. Unable to set parameter buffersize in result of type org.
Tutorial also discusses about the default interceptors configured in struts 2. Used for web resource integration, including jsp integration. First, we need to change or query the applications state, and then we need to present an updated view of the application. Testing actions apache struts 2 wiki apache software. Unable to find a result type for extension properties or xml by lokesh gupta filed under. Also i cant use result type dispatcher as the struts version is not allowing me to do. Recommended articles how to display image in jsp from database using struts 2 base64encoder how to display byte array image in jsp using struts2 struts 2 and jasper report integration example struts 2 multiple configuration file example how to send data from jsp to struts action class using jquery ajax. There are a few things that need to be done in order to use json with struts 2. Suppose you have a list of detail records and you want to allow the user to edit the records via a dialog box that opens on top of the list.
If you are using the higher version, it is always recommended to use this api. This kind of logic is better to implement in interceptor not in the result. Struts2 return json if authentication failed in interceptor. Struts 2 ui tags form, checkbox, radio, select, submit. Hello, im having problems getting struts2 jsonplugin 2. When validation happens in struts 2 it will redirect to result type input if type tiles jsp will display the validation message and if result type redirectaction, validation message will not get display. Struts2 provides a firstclass support to freemarker template. It is called from two cat and dog different struts 2 actions. Struts2 login application example struts on oct 23, 2011 14 comments by sivateja l et us see the simple login application using struts2, but friends am giving with out validations, we will see in depth validation s very soon. Results and result types in struts 2 struts tutorial by wideskills. This result invokes an entire other action, complete with its own interceptor stack and result. Its used to forward to a servlet, jsp, html page, and so on, on the server. When to use redirect and chain result types in struts2.
Results the result is the encapsulation of the mvc view concerns of theframework. Struts2 validation example struts2 validation implement by xml file in struts 2. The action method should return result as json type. It aims at providing increased productivity through reduced. Struts2 provides more options of validation like email validation, integer range validation, form validation field, expression validation, regex validation, required. Interceptors are very useful in struts 2 as it performs different types of important activities such as logging, file upload, validation and so on. All of the above features are supported in struts 2. How to call action class using ajax in struts 2 websparrow. A new result type wcsstore is defined in struts 2 for websphere commerce which will add store directory. Feb 09, 2008 there is a better method for this at the end of this post in struts2, file is downloaded as stream using streamresult class.
Most results simply forward to a server page or template, but other result types can be used to do more interesting things. The action is the subelement of package and represents an action. Streamresult caught ognlexception while setting property buffersize on type org. Can anybody please suggest me an alternative to result type dispatcher. Heres an example that shows how to define this result type inside an element in struts. In this page, we will learn struts 2 json integration using annotation. Home struts 2 struts 2 ui tags form, checkbox, radio, select, submit struts2 ui tags are used to generate html form elements in result pages. Struts2 is the next generation of modelviewcontroller web application frameworks. To download file of dynamic name, size or type we need to extend this streamresult class. If a type attribute is not specified, the framework will use the default dispatcher type, which forwards to another web resource. It is similar to dispatcher result, but just between actions. Ognl is tightly coupled in struts2 and used to store form parameters as java bean variables in valuestack and to retrieve the values from valuestack in result pages.
Please help me if anyone have faced similar kind of problem if i use type dispatcher in result tag. The dispatcher result type is the default type, and is used if no other result type is specified. My default result type is tiles and everything works alright as long as you dont look at the console. Facing a lot of problems in development using struts2.
If you extend struts default, all the actions of this package can use the interceptors and result types defined in the struts default. The results tag is used to specify a result type in sturts. Filterdispatcher used in the early development of struts 2 and deprecated from the version 2. Q 5 which of the following feature is present in struts 2. This is usually caused by using struts tags without the associated. Struts consists of a number of predefined result types and whatever has been seen previously that was the default result type dispatcher, which is used to dispatch to jsp pages. Aug 28, 2012 note how we used attribute methodadd and methodlist to let struts2 know which particular method needs to be called within the action class. When validation happens in struts 2 it will redirect to result type input if typetiles jsp will display the validation message and if result typeredirectaction, validation message will not get display. This struts2 plugin simply provide a new result type. Struts allow you to use other markup languages for the view technology to present the results and popular choices include velocity, freemaker, xslt and tiles. Struts2 not forwarding to another action using type. The framework provides several implementations of the com. To minimize configuration, results can be configured with a single value, which will be converted into a parameter, and each result can.
If the resource is a javaserver page, then the container will render it, using its jsp engine. Likewise if the name attribute is not specified, the framework will give it the name success using these intelligent defaults, the most often used result types also. The jsondefault package contains an interceptor and the result type configuration for json requests and responses. In this case, you could create a new result type for xml or json and achieve this. Earlier we looked into struts2 data tags and struts2 control tags and how we can use ognl expressions with struts2 tags.
In the end, thanks to apache struts 2 documentation result types. Results and result types in struts 2 struts tutorial by. The dispatcher result type is the default type and is used if no other result type is specified. I started a new struts 2 project today with tiles and spring. Also the result type mapped here is typefreemarker. The action class manages the applications state, while theresult type manages the view.
Result configuration apache struts apache software. The result, the dispatcher result, makes all the valuestack dataavailable to the. We can customize the layout of the struts 2 application by integrating with tiles framework. The action class manages the applications state, and the result type manages the view. It provide better flexibility to specify what properties of a java bean to be serialized, and it works well with spring and hibernate. Strutsuser result type redirectaction vs dispatcher. Result 103 104 public abstract class strutsresultsupport implements result, strutsstatics 105 106 private static final logger log loggerfactory. Im trying to get strutsjquery grid to load json data that struts2 json plugin forms from a listobject property in that action class. Struts comes with a number of predefined result types and whatever weve already seen that was the default result type dispatcher, which is used to dispatch to jsp pages. We will look into the complete flow once we have seen the implementation and application behavior with duplicate request.