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POa list of list value populated in struts2 iterator
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  1. POa list of list value populated in struts2 iterator
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    copied!<p>For my case, it is a little bit trickier. I just have another list in person object, it is called state. like below:</p> <pre><code>public class People { private int id; private String name; private List&lt;State&gt; states; // Plus setters/getters } public class State { private int id; private String stateAbbr; private String stateName; public State (String stateAbbr, String stateName) { this.stateAbbr = stateAbbr; this.stateName = stateName; } // Plus setters/getters } </code></pre> <p>Action class:</p> <pre><code>public class PersonAction extends ActionSupport { private List&lt;People&gt; peopleList; public List&lt;People&gt; getPeopleList() { return peopleList; } public void setPeopleList(List&lt;People&gt; peopleList) { this.peopleList = peopleList; } //Initial Load method @Override public String execute() { peopleList = new ArrayList&lt;People&gt;(); int alpha = 65; for(int i = 0; i &lt; 3 ; i++) { People people = new People(); people.setId(i); people.setName(String.valueOf((char)alpha++)); peopleList.add(people); } for (People people : peopleList){ State state = new State("BC", "BritishColumbia"); List&lt;State&gt; states = new ArrayList&lt;State&gt;(); states.add(state); state = new State("AC", "AppleColumbia"); states.add(state); people.setStates(states); } return SUCCESS; } //Function that handles the form submit public String updatePerson() { for(People people : peopleList) { System.out.println(people.getId() + ":" + people.getName()); } return SUCCESS; } </code></pre> <p>}</p> <p>JSP page</p> <pre><code>&lt;s:form action="doUpdate"&gt; &lt;s:iterator value="peopleList" status="stat" var="people"&gt; &lt;s:textfield value="%{#people.name}" name="peopleList[%{#stat.index}].name" /&gt; &lt;s:iterator value="states" status="stateStatus" var="personState"&gt; &lt;s:textfield value="%{#personState.stateAbbr}" name="peopleList[%{#stat.index}].states[%{#stateStatus.index}].stateAbbr" label="Abbr State" /&gt; &lt;br /&gt; &lt;/s:iterator&gt; &lt;/s:iterator&gt; &lt;s:submit value="Submit" /&gt; &lt;/s:form&gt; </code></pre> <p>When I submit this page, I got states is [null] in person, why?</p>
 

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