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Install with Maven

Currently the JJSON artifacts are only available on my own small repository. You can add the stable repository when adding this to your pom.xml 

            <repositories>
                <repository>
                    <id>grobmeier-stable</id>
                    <url>http://code.grobmeier.de/mvn/stable</url>
                </repository>
            </repositories>

Then add the following dependency to your project

             <dependency>
                <groupId>de.grobmeier.json</groupId>
                <artifactId>jjson</artifactId>
                <version>0.1.0</version>
             </dependency>

Manual Install

Just drop the jar-File(s) into your projects classpath and go for it. At the moment there is no maven repository available online, but this is in the works.

Install the Struts 2 Plugin

Install the JsonResult? class in your struts.xml package: 

<result-types>
    <result-type name="json" class="de.grobmeier.json.plugins.struts2.JsonResult"/>
</result-types>
Then you can use this result type like that: 

<action name="doSomething" class="de.grobmeier.DoSomething">
    <result type="json" />
</action>
The result is a json string. Please note, everything you want in your JSON string must be annotated with @JSON, even the Action class it self. 

                @JSON
                class DoSomething {
                @JSON public String myString = "test";
                @JSON public String myString2 = "test2";
                // GETTER necessary like getMyString()
                }
This will return {"myString" : "test", "myString2" : "test2"} Fields need matching getter methods. You can even annotate methods instead of the fields, if you would like to to return a object created on the fly: 

                @JSON
                class DoSomething {
                @JSON public void blub() { return "test"; }
                }
This will return {"blub" : "test"}