How to create a menu bar in jsp

Create array with predefined values

String[] myArray = {"option1", "option2", "option3"};
Create getters and setters

public String[] getMyArray() {
    return myArray;
}
public void setMyArray(String[] myArray) {
    this.myArray = myArray;
}
Then create select dropdown and iterate through your array, you can use Struts2 tags like this

<select>
    <s:iterator value="myArray">
        <option value="<s:property/>"><s:property/></option> <!-- This prints out current value of the iterator -->
    </s:iterator>
</select>