CODEWITHSUNDEEP
urlparametersstruts2
user5739878
user5739878

Reputation: 45

Capturing multiple parameters in a url to a single array in Struts 2

This is my struts.xml class:

<action name="{param1}/{param2}/{param3}" 
        class="myactionclass"  
        method="execute"> 
     <result name="success">/success.jsp</result>
</action>

So in my action class, I have to create three String objects String param1, param2, param3 (and add getter and setter methods) to get the param values. What I want to do is, instead of creating 3 different String objects, create a single String array and store the param values into the String array using the setter.

How do I achieve this in my action class ?

Upvotes: 1

Views: 875

Answers (2)

Aleksandr M
Aleksandr M

Reputation: 24396

You need to tell which parameter will go to which index in the array.

<action name="{param[0]}/{param[1]}/{param[2]}" class="myactionclass"> 
    <result name="success">/success.jsp</result>
</action>

Action (using array):

private String[] param = new String[3];
// getter and setter

Instead of array you can use List, then there is no need to initialize it in the action.

Action (using List):

private List<String> param;
// getter and setter

Map is also an option.

Action (using Map):

private Map<String, String> param;
// getter and setter

struts.xml (using Map in action):

<action name="{param['p1']}/{param['p2']}/{param['p3']}" class="myactionclass"> 
     <result name="success">/success.jsp</result>
</action>

Upvotes: 1

fustaki
fustaki

Reputation: 1614

Populating an array in Struts2 using parameters in query-string is pretty easy.

In your Action declare the array with corresponding setter

private String[] fruits;

public void setFruits(String[] fruits) {
    this.fruits = fruits;
}

This request will populate your fruits array

/myactionuri?fruits=apple&fruits=banana&fruits=peach

But with static parameters this mechanism doesn't seem to work in the same way.

I found this solution, maybe not as elegant, but it works. In your struts.xml:

<!-- warning: this pattern matches all requests with 3 tokens separated by slashes -->
<action name="*/*/*" class="com.xxx.MyAction" > 
     <param name="f1">{1}</param>
     <param name="f2">{2}</param>
     <param name="f3">{3}</param>
</action>

And in your Action:

private String[] fruits = new String[3]; //need to be initiated

public void setF1(String f1) {
    this.fruits[0] = f1;
}

public void setF2(String f2) {
    this.fruits[1] = f2;
}

public void setF3(String f3) {
    this.fruits[2] = f3;
}

Hope this will help you.

Upvotes: 3

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