为什么控制台和浏览器控制台都没有错误，但输出没有显示在屏幕上？

Question

jsp

<div id="starRatingList">

<button class="btn btn-primary starRatingList" type="button" id="starInsert">리뷰</button>

</div>

ajax

$(function () {
   
   $(".starRatingList").on("click", function(e){
    e.preventDefault();

$.ajax({

url: "starList.do",

type: "POST",

dataType: "json",

success: function(data) {

console.log(data);

var list = data.list;

var starRatingHTML = '';

for (var i = 0; i < list.length; i++) {

starRatingHTML += '<blockquote class="blockquote comment border-top-0 border-left-0 border-right-0 px-0 pt-0">';

starRatingHTML += '<div class="d-sm-flex align-items-center pb-2">';

starRatingHTML += '<h6 class="mb-0">' + list[i].member_id + '</h6>';

starRatingHTML += '<span class="d-none d-sm-inline mx-2 text-muted opacity-50">|</span>';

starRatingHTML += '<div class="star-rating">';

for (var j = 0; j < 5; j++) {

if (j < list[i].star_count) {

starRatingHTML += '<span class="star">&#9733;</span>';

} else {

starRatingHTML += '<span class="star">&#9734;</span>';

}

}

starRatingHTML += '</div></div>';

starRatingHTML += '<p class="mb-0">' + list[i].review + '</p>';

starRatingHTML += '</blockquote>';

}

$('#starRatingList').html(starRatingHTML);

},

error : function(request, status, error) {

alert("code:"+request.status+"\n"+"message:"+request.responseText+"\n"+"error:"+error);

}

});

});

});


**action**

public class StarListAction implements Action {

@Override

public ActionForward execute(HttpServletRequest request, HttpServletResponse response)

throws IOException, ServletException, Exception {


response.setContentType("application/json;charset=UTF-8");

request.setCharacterEncoding("UTF-8");

starDAO dao = starDAO.getInstance();


JSONArray list = dao.starList();


JSONObject result = new JSONObject();

result.put("list", list);


PrintWriter out = response.getWriter();

out.print(result);


return null;

}

}

道

public JSONArray starList() {

JSONArray result = new JSONArray();

try {

openConn();

sql = "select * from star_review order by store_num";


pstmt = con.prepareStatement(sql);

rs = pstmt.executeQuery();

while (rs.next()) {

JSONObject obj = new JSONObject();

obj.put("member_id", rs.getString("member_id"));

obj.put("review", rs.getString("review"));

obj.put("star_count", rs.getInt("star_count"));

result.put(obj);

}

} catch (SQLException e) {

e.printStackTrace();

} finally {

closeConn(rs, pstmt, con);

}

return result;

}