求助 jsp 获取json格式数据 在线等
public String execute() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("text/html;charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
ipImpl iI = new ipImpl();
ipbean ipjb = new ipbean();
String startDate = java.net.URLDecoder.decode(request.getParameter("startDate"), "UTF-8");
String endDate = java.net.URLDecoder.decode(request.getParameter("endDate"), "UTF-8");
List<ipbean> ipList = iI.queryIp(startDate, endDate);
// request.setAttribute("ipList", ipList);
Iterator<ipbean> itip = ipList.iterator();
JSONArray ja = new JSONArray();
while (itip.hasNext()) {
ipjb = itip.next();
JSONObject sign = new JSONObject();
sign.put("id", ipjb.getId());
sign.put("ip", ipjb.getStr_ip());
sign.put("Date", ipjb.getStr_Date());
ja.put(sign);
}
System.out.println(ja);
return null;

}


jsp页面上如何按表格格式显示获取到ja里的数据

[解决办法]
你后台先response....print(ja);

前台JSP才可以得到JSON数据.
前台通过response.responseText 可以得到JSON 后面的处理自己看看如何读取JSON数据
[解决办法]
接你的代码：
response.setContentType("text/plain;charset=utf-8");
PrintWriter responseStream = response.getWriter();
responseStream.println(jsonArray);

[解决办法]

Java code

@RequestMapping("/topic/by_channel.do")    public void topicsByChannel(Integer channelId, HttpServletResponse response)            throws JSONException {        JSONArray arr = new JSONArray();        if (channelId != null) {            List<CmsTopic> list = manager.getListByChannel(channelId);            JSONObject o;            for (CmsTopic t : list) {                o = new JSONObject();                o.put("id", t.getId());                o.put("name", t.getName());                arr.put(o);            }        }        ResponseUtils.renderJson(response, arr.toString());    }
[解决办法]
Java code
/**     * 发送json。使用UTF-8编码。     *      * @param response     *            HttpServletResponse     * @param text     *            发送的字符串     */    public static void renderJson(HttpServletResponse response, String text) {        render(response, "application/json;charset=UTF-8", text);    }