Struts2 Json and Jquery Example

Here we will fetch a action variable’s value in jsp page using JSON and jquery
Here I am using struts 2.3.4 for that we have to include struts-2-json-plugin-2.3.4.jar in class path or include it to your lib folder if you are using any IDE.

Action class

package example;

import com.opensymphony.xwork2.ActionSupport;

public class HelloJSON extends ActionSupport {

    private String name;
    private String welcomeMessage;

    @Override
    public String execute() {

        System.out.println("Inside Action name is " + getName());
        setWelcomeMessage("Welcome " + getName() + "!!");
        System.out.println(getWelcomeMessage());
        return SUCCESS;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getWelcomeMessage() {
        return welcomeMessage;
    }

    public void setWelcomeMessage(String welcomeMessage) {
        this.welcomeMessage = welcomeMessage;
    }
}

package example;

import com.opensymphony.xwork2.ActionSupport;

public class HelloJSON extends ActionSupport {

private String name;

private String welcomeMessage;

@Override

public String execute() {

System.out.println("Inside Action name is " + getName());

setWelcomeMessage("Welcome " + getName() + "!!");

System.out.println(getWelcomeMessage());

return SUCCESS;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getWelcomeMessage() {

return welcomeMessage;

}

public void setWelcomeMessage(String welcomeMessage) {

this.welcomeMessage = welcomeMessage;

}

In struts.xml we have to extend json-default and result type shold be json. No need to specify path inside <result &rt;</result<

struts.xml

 <package name="example1" extends="json-default">
        <action name="test" class="example.HelloJSON">
            <result  type="json"></result>
        </action>
 </package>

</action>

</package>

Jsp page

<%@ page contentType="text/html; charset=UTF-8" %>
<html>
    <head>
        <title><s:text name="Hello JSON/></title>
        <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    </head>
    <body>
    <form action="" id="myForm">
            <label for="name">Enter Your Name</label>
            <input name="name" id="name">
            <input type="button" id="button1" value="Submit">
        </form>
        <div class="result"></div>
        <script>
            $("#button1").click(function() {
                var name1=$("#name").val();
                 $.getJSON('test', { name: name1}, function(data) {
                    $('.result').html(data.welcomeMessage);
                    return false;
                });
            });
        </script>
    </body>
</html>

<%@ page contentType="text/html; charset=UTF-8" %>

<html>

<head>

</head>

<body>

<label for="name">Enter Your Name</label>

</form>

$("#button1").click(function() {

var name1=$("#name").val();

$.getJSON('test', { name: name1}, function(data) {

$('.result').html(data.welcomeMessage);

return false;

});

</script>

</body>

</html>

Here we are using $.getJSON(‘test’, { name: name1}, function(data) method to fetch json data.