jQuery

public String testPost() throws Exception {
    ResultMessage resultMessage = new ResultMessage();
    if (!StringUtils.isEmpty(user)) {
        resultMessage.setSuccess(true);
        resultMessage.setMessage("user is not null");
    } else {
        resultMessage.setSuccess(false);
        resultMessage.setMessage("user is null");
    }
    return "resultMessage";
}
public String testPost2() throws Exception {
    Map<String, Object> retMessage= new HashMap<String, Object>();
    if (!StringUtils.isEmpty(user)) {
        retMessage.put("result", true);
        retMessage.put("message", "user is not null");
    } else {
        retMessage.put("result", false);
        retMessage.put("message", "user is null");
    }
    ActionContext.getContext().getValueStack().set("retMessage", retMessage);
    return "testPost2";
}