Struts2中使用JSON
Struts2对JSON的良好支持让我们可以更加方便的使用ajax和json。需要的jar包有(附件里面都有，可以下载)：
json-lib-2.1-jdk15.jar,ezmorph-1.0.3.jar,struts2-json-plugin-2.2.1.jar,(也就是googlecode(http://jsonplugin.googlecode.com/files/jsonplugin-0.34.jar)上面的jsonplugin，在struts2_2.2.1的里面叫struts2-json-plugin-2.2.1.jar),struts2-core-2.2.1.jarxwork-core-2.2.1.jar
struts.xml的配置：
<package name="test"extends="json-default"> <action name="*Area" class="com.yeepay.agent.action.AreaAction" method="{1}"> <interceptor-ref name="json" /><!--处理以JSON文本提交的请求--> <result name="findProvince" type="json" /> <result name="findCityByProvince" type="json" /> </action></package>
Action的代码：
@SuppressWarnings("serial")public class AreaAction extends BaseAction{public static final Logger log = Logger.getLogger(AreaAction.class);private String areaList=null;private AreaBaseService areaBaseService;public String findProvince(){try {List<Area> list=areaBaseService.findProvince();JSONArray arrayObject=JSONArray.fromObject(list);areaList=arrayObject.toString();} catch (SQLException e) {log.error(e);}return "findProvince";}public String getAreaCode() {return areaCode;}public void setAreaCode(String areaCode) {this.areaCode = areaCode;}public AreaBaseService getAreaBaseService() {return areaBaseService;}public void setAreaBaseService(AreaBaseService areaBaseService) {this.areaBaseService = areaBaseService;}}
jsp里用jquery发送ajax请求：
$.getJSON("findProvinceArea.action",null,function(msg){alert(msg); });
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