struts.xml 中加入

		
		<action name="Captcha" class="com.example.action.ajax.Captcha">
			<result name="success" type="json"></result>
		</action>
		
		

Java 檔案

		
package com.example.action.ajax;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionSupport;

public class Captcha extends ActionSupport {
	private static final long serialVersionUID = 7284583098398030297L;

	private String string1 = "A";
	private String[] stringarray1 = {"A1","B1"};
	private int number1 = 123456789;
	private int[] numberarray1 = {1,2,3,4,5,6,7,8,9};
	private List<String> lists = new ArrayList<String>();
	private Map<String, String> maps = new HashMap<String, String>();
	
	//no getter method, will not include in the JSON

	public Captcha(){
		lists.add("list1");
		lists.add("list2");
		lists.add("list3");
		lists.add("list4");
		lists.add("list5");
		
		maps.put("key1", "value1");
		maps.put("key2", "value2");
		maps.put("key3", "value3");
		maps.put("key4", "value4");
		maps.put("key5", "value5");
	}

	public String execute() {
               return Action.SUCCESS;
        }
	
	public String getString1() {
		return string1;
	}

	public void setString1(String string1) {
		this.string1 = string1;
	}

	public String[] getStringarray1() {
		return stringarray1;
	}

	public void setStringarray1(String[] stringarray1) {
		this.stringarray1 = stringarray1;
	}

	public int getNumber1() {
		return number1;
	}

	public void setNumber1(int number1) {
		this.number1 = number1;
	}

	public int[] getNumberarray1() {
		return numberarray1;
	}

	public void setNumberarray1(int[] numberarray1) {
		this.numberarray1 = numberarray1;
	}

	public List<String> getLists() {
		return lists;
	}

	public void setLists(List<String> lists) {
		this.lists = lists;
	}

	public Map<String, String> getMaps() {
		return maps;
	}

	public void setMaps(Map<String, String> maps) {
		this.maps = maps;
	}
	
}
		
		

測試URL http://localhost:8080/ajax/Captcha.action

			
		<action name="Captcha" class="com.example.action.ajax.Captcha">
			<interceptor-ref name="defaultStack" />
			<interceptor-ref name="json">
				<param name="enableSMD">true</param>
			</interceptor-ref>
			<result name="success" type="json"></result>
		</action>
			
			

			
package com.example.action.ajax;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionSupport;

public class Captcha extends ActionSupport {
	private static final long serialVersionUID = 7284583098398030297L;

	private String phone = "13113668890";
	private String email = "netkiller@msn.com";
	private Boolean status = false;
	
	//no getter method, will not include in the JSON

	public Captcha() {

	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String execute() {
		this.status = true;
		System.out.printf("%s, %s, %s, %b\n", this.getClass().getName(), this.getPhone(), this.getEmail(), this.getStatus());
		return Action.SUCCESS;
	}

	public String getPhone() {
		return this.phone;
	}

	public void setPhone(String phone) {
		this.phone = phone;
	}

	public void setStatus(Boolean status) {
		this.status = status;
	}
	public boolean getStatus() {
		return this.status;
	}
}
			
			

			
# curl http://192.168.4.34:8080/ajax/Captcha.do
{"email":"netkiller@msn.com","phone":"13113668890","status":true} 

# curl -X POST -H "Content-Type:application/json" -d '{"phone":"13066884444", "email":"neo.chan@live.com"}' http://192.168.4.34:8080/ajax/Captcha.do
{"email":"neo.chan@live.com","phone":"13066884444","status":true}
			
			

			
# curl "http://192.168.4.34:8080/ajax/Captcha.do?phone=13322993040&email=netkiller@mac.com"
{"email":"netkiller@mac.com","phone":"13322993040","status":true}