jquery json ajax例子2联动

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    /**     *      * @description 大分をわった、中分リスト内容をわる。<br>     * @return JSONString     * @note なし     */    public String changeCustGyoMClassList() {        // ：中分リスト作成        custGyoMClassList = callSearchNewService.getCustGyoMClassList(Integer.parseInt(selectedBClass));        try {            JsonUtil.sendJson(custGyoMClassList);        } catch (IOException e) {            if (log.isErrorEnabled()) {                log.error(e);            }        }        return null;    }package jp.co.syspro.common.util;import java.io.IOException;import javax.servlet.http.HttpServletResponse;import net.sf.json.JSONArray;import org.apache.struts2.ServletActionContext;public class JsonUtil {/** * jsonデタる *  * @param obj *            デタ * @throws IOException */public static void sendJson(Object obj) throws IOException {JSONArray json = JSONArray.fromObject(obj);HttpServletResponse response = ServletActionContext.getResponse();response.setCharacterEncoding("UTF-8");response.getWriter().write(json.toString());}}