949~ 952旅游线路详情，分析，实现前后编码

旅游线路的详情展示

　　分析：

Servlet

/**
 * 根据id查询一个旅游线路的详细信息
 * @param request
 * @param response
 * @throws ServletException
 * @throws IOException
 */
public void findOne(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    //1.接收id
    String rid = request.getParameter("rid");
    //2.调用service查询route对象
    Route route = routeService.findOne(rid);
    //3.转为json写回客户端
    writeValue(route,response);
}

Service

@Override
public Route findOne(String rid) {
    //1.根据id去route表中查询route对象
    Route route = routeDao.findOne(Integer.parseInt(rid));

    //2.根据route的id 查询图片集合信息
    List<RouteImg> routeImgList = routeImgDao.findByRid(route.getRid());
    //2.2将集合设置到route对象
    route.setRouteImgList(routeImgList);
    //3.根据route的sid（商家id）查询商家对象
    Seller seller = sellerDao.findById(route.getSid());
    route.setSeller(seller);

    return route;
}

SellerDao

public class SellerDaoImpl implements SellerDao {
    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public Seller findById(int id) {
        String sql = "select * from tab_seller where sid = ? ";
        return template.queryForObject(sql,new BeanPropertyRowMapper<Seller>(Seller.class),id);
    }
}

 routeDao

public class SellerDaoImpl implements SellerDao {
    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public Seller findById(int id) {

        String sql = "select * from tab_seller where sid = ? ";
        return template.queryForObject(sql,new BeanPropertyRowMapper<Seller>(Seller.class),id);
    }
}

 RouteImgDao

public class RouteImgDaoImpl implements RouteImgDao {

    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public List<RouteImg> findByRid(int rid) {
        String sql = "select * from tab_route_img where rid = ? ";
        return template.query(sql,new BeanPropertyRowMapper<RouteImg>(RouteImg.class),rid);
    }
}

 Route_detail.html中加载后

　　1.获取rid

　　2.发送ajax请求，获取route对象

　　3.解析对象的数据

//1.获取rid
var rid = getParameter("rid");

//2.发送请求请求 route/findOne
 $.get("route/findOne",{rid:rid},function (route) {
     //3.解析数据填充html
     $("#rname").html(route.rname);
     $("#routeIntroduce").html(route.routeIntroduce);
     $("#price").html("¥"+route.price);
     $("#sname").html(route.seller.sname);
     $("#consphone").html(route.seller.consphone);
     $("#address").html(route.seller.address);

     //图片展示

     var ddstr = '<a class="up_img up_img_disable"></a>';

     //遍历routeImgList
     for (var i = 0; i < route.routeImgList.length; i++) {
         var astr ;
         if(i >= 4){
             astr = '<a title="" class="little_img" data-bigpic="'+route.routeImgList[i].bigPic+'" style="display:none;">\n' +
                 '                        <img src="'+route.routeImgList[i].smallPic+'">\n' +
                 '                    </a>';
         }else{
             astr = '<a title="" class="little_img" data-bigpic="'+route.routeImgList[i].bigPic+'">\n' +
                 '                        <img src="'+route.routeImgList[i].smallPic+'">\n' +
                 '                    </a>';
         }


         ddstr += astr;
     }
     ddstr+='<a class="down_img down_img_disable" style="margin-bottom: 0;"></a>';

     $("#dd").html(ddstr);

     //图片展示和切换代码调用
     goImg();
 });