dao:

public List<Favorite> findRidByUid(int uid) {
    String sql="select * from tab_favorite where uid=?";

    return jdbcTemplate.query(sql,new BeanPropertyRowMapper<Favorite>(Favorite.class),uid);
}
service:

public List<Favorite> findFavorite(int uid) {
    List<Favorite> favorites = dao.findRidByUid(uid);
    for (Favorite favorite : favorites) {
        favorite.setRoute(routeDao.findOne(favorite.getRid()));
    }
    return favorites;
}

servlet:

public void findFavorite(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    //获取uid
    User user = (User) request.getSession().getAttribute("user");
    //调用service方法
    List<Favorite> favorite = favoriteService.findFavorite(user.getUid());
    //序列化json写回客户端
    writeValue(favorite,request,response);
}
html:

<script>
    $(function () {
        $.get("routeServlet/findFavorite",{},function (data) {
            var divs="";
            for (var i = 0; i < data.length; i++) {
                var route=data[i];
                var div='<div class="col-md-3">\n' +
                    '                                    <a href="route_detail.html?rid='+route.rid+'">\n' +
                    '                                        <img src="'+route.route.rimage+'" alt="">\n' +
                    '                                        <div class="has_border">\n' +
                    '                                            <h3>'+route.route.rname+'</h3>\n' +
                    '                                            <div class="price">网付价<em>￥</em><strong>'+route.route.price+'</strong><em>起</em></div>\n' +
                    '                                        </div>\n' +
                    '                                    </a>\n' +
                    '                                </div>';
                divs+=div;
            }
            $("#favorite").html(divs);
        })
    })
</script>