JavaWeb综合旅游网项目（三）-阿里云开发者社区

9 旅游线路的分页展示

点击了不同的分类后，将来看到的旅游线路不一样的。通过分析数据库表结构，旅游线路表和分类表是一个多对一的关系

查询不同分类的旅游线路sql

Select * from tab_route where cid = ?;

所以点击分类栏时，应该在页面访问路径里面传一个cid

9.1 类别的id的传递

js中 location.search 属性，是一个可读可写的字符串，可设置或返回当前 URL 的查询部分（问号 ? 之后的部分）

假设当前的URL就是 http://www.runoob.com/submit.htm?email=someone@ example.com

<script>
document.write(location.search);
</script>

输出

?email=someone@example.com

9.1.1 header.html

传递cid

var li = '<li><a href="route_list.html?cid='+ data[i].cid +'">' + data[i].cname + '</a></li>';

9.1.2 route_list.html

获取cid

<script>
    $(function () {
        var search = location.search;
        var cid = search.split("=")[1];
    });
</script>

9.2 通过id查询不同类别的旅游线路数据

分页展示

9.2.1 分析

由于分页展示需要总记录数、总页数、当前页码、每页显示条数以及每页显示的数据集合，所以将这些数据封装成一个类 PageBean 来便于传递参数。

客户端向后台发送ajax请求，只用携带当前页码（currentPage）、每页显示条数（pageSize）以及分页id（cid）即可计算出其余信息，在我之前的博客中已经详细论述过，这里不做赘述。

9.2.2 服务器端

PageBean对象：

package cn.itcast.travel.domain;
import java.util.List;
// 分页对象
public class PageBean<T> {
    private int totalCount;     // 总记录数
    private int totalPage;      // 总页数
    private int currentPage;    // 当前页码
    private int pageSize;       // 每页显示的条目数
    private List<T> list;       // 每页要显示的数据
    public int getTotalCount() {
        return totalCount;
    }
    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }
    public int getTotalPage() {
        return totalPage;
    }
    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }
    public int getCurrentPage() {
        return currentPage;
    }
    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }
    public int getPageSize() {
        return pageSize;
    }
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
    public List<T> getList() {
        return list;
    }
    public void setList(List<T> list) {
        this.list = list;
    }
}

RouteServlet：

处理客户端传来的三个参数：cid、当前页面和每页显示的条目数，并调用service层返回一个pb对象

package cn.itcast.travel.web.servlet;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.service.RouteService;
import cn.itcast.travel.service.impl.RouteServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/route/*")
public class RouteServlet extends BaseServlet {
    private RouteService routeService = new RouteServiceImpl();
    /**
     * 分页查询
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    public void pageQuery(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String currentPageStr = request.getParameter("currentPage");
        String pageSizeStr = request.getParameter("PageSize");
        String cidStr = request.getParameter("cid");
        int cid = 0;
        if (cidStr != null && cidStr.length() > 0  && !"null".equals(cidStr)){
            cid = Integer.parseInt(cidStr);
        }
        int currentPage = 0;
        if (currentPageStr != null && currentPageStr.length() > 0){
            currentPage = Integer.parseInt(currentPageStr);
        }else {
            currentPage = 1;    // 默认是第一页
        }
        int pageSize = 0;
        if (pageSizeStr != null && pageSizeStr.length() > 0){
            pageSize = Integer.parseInt(pageSizeStr);
        }else {
            pageSize = 5;   // 默认每页显示5条记录
        }
        // 调用service查询PageBean对象
        PageBean<Route> pb = routeService.pageQuery(cid, currentPage, pageSize);
        // 序列化为json
        writeValue(pb, response);
    }
}

servlet调用了service层的 pageQuery 方法来请求一个 PageBean对象，实现如下：

RouteService：

接口

package cn.itcast.travel.service;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
// 旅游线路service
public interface RouteService {
    /**
     * 根据类别进行分类查询
     * @param cid
     * @param currentPage
     * @param pageSize
     * @return
     */
    public PageBean<Route> pageQuery(int cid, int currentPage, int pageSize);
}

实现类，封装PageBean对象并返回

package cn.itcast.travel.service.impl;
import cn.itcast.travel.dao.RouteDao;
import cn.itcast.travel.dao.impl.RouteDaoImpl;
import cn.itcast.travel.domain.PageBean;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.service.RouteService;
import java.util.List;
public class RouteServiceImpl implements RouteService {
    private RouteDao routeDao = new RouteDaoImpl();
    @Override
    public PageBean<Route> pageQuery(int cid, int currentPage, int pageSize) {
        // 封装PageBean
        PageBean<Route> pb = new PageBean<Route>();
        pb.setCurrentPage(currentPage);
        pb.setPageSize(pageSize);
        int totalCount = routeDao.findTotalCount(cid);
        pb.setTotalCount(totalCount);   // 总记录数
        int start = (currentPage - 1) * pageSize;
        List<Route> list = routeDao.findByPage(cid, start, pageSize);
        pb.setList(list);   // 要展示的数据
        int totalPage = totalCount % pageSize == 0 ? totalCount/pageSize : (totalCount/pageSize) + 1;
        pb.setTotalPage(totalPage); // 总页数
        return pb;
    }
}

RouteDao：

接口

package cn.itcast.travel.dao;
import cn.itcast.travel.domain.Route;
import java.util.List;
public interface RouteDao {
    /**
     * 根据cid查询总记录数
     */
    public int findTotalCount(int cid);
    /**
     * 根据cid，start，pageSize查询当前页的数据集合
     */
    public List<Route> findByPage(int cid, int start, int pageSize);
}

实现类

package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.RouteDao;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
public class RouteDaoImpl implements RouteDao {
    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public int findTotalCount(int cid) {
        String sql = "select count(*) from tab_route where cid = ?";
        return template.queryForObject(sql, Integer.class, cid);
    }
    @Override
    public List<Route> findByPage(int cid, int start, int pageSize) {
        String sql = "select * from tab_route where cid = ? limit ? , ?";
        return template.query(sql, new BeanPropertyRowMapper<>(Route.class), cid, start, pageSize);
    }
}

9.2.3 客户端

route_list.html 中由于在异步请求数据的过程中还要异步请求数据，第一次是页面加载完成之后请求PageBean的数据，第二次是分页页码请求超链接的cid和当前页面数据，所以不能直接在

$(function () {}$(function () {}

里面写方法体了，要单独抽取出一个方法

function load(cid, currentPage) {
    $.get("route/pageQuery", {cid:cid,currentPage:currentPage}, function (pb) {
        };
}

load方法中展示分页工具条和分页页码的逻辑如下：

// 分页工具条
$("#totalPage").html(pb.totalPage);
$("#totalCount").html(pb.totalCount);
// 展示分页页码
var lis = "";
var firstPage = '<li onclick="javascript:load(' + cid + ',' + 1 + ')"><a href="javascript:void(0)">首页</a></li>';
var preNum = pb.currentPage - 1;
if (preNum <= 0)
    preNum = 1;
var prePage = '<li onclick="javascript:load(' + cid + ',' + preNum + ')" class="threeword"><a href="javascript:void(0)">上一页</a></li>';
lis += firstPage;
lis += prePage;
for (var i = 1; i <= pb.totalPage; i ++){
    var li;
    if ( i == pb.currentPage){
        li = '<li class="curPage" onclick="javascript:load(' + cid + ',' + i + ')"><a href="javascript:void(0)">' + i + '</a></li>';
    }else {
        li = '<li onclick="javascript:load(' + cid + ',' + i + ')"><a href="javascript:void(0)">' + i + '</a></li>';
    }
    lis += li;
}
var nextNum = pb.currentPage + 1;
if (nextNum >= pb.totalPage)
    nextNum = pb.totalPage;
var nextPage = '<li onclick="javascript:load(' + cid + ',' + nextNum + ')" class="threeword"><a href="javascript:;">下一页</a></li>';
var lastPage = '<li onclick="javascript:load(' + cid + ',' + pb.totalPage + ')" class="threeword"><a href="javascript:void(0;">末页</a></li>';
lis += nextPage;
lis += lastPage;
$("#pageNum").html(lis);

展示列表数据的逻辑和展示分类页码类似：

var route_lis = "";
            for (var i = 0; i < pb.list.length; i++) {
                // {rid:1,rname:"xxxx"}
                var route = pb.list[i];
                var li = '<li>\n' +
'                            <div class="img"><img src="' + route.rimage + '" style="width: 299px;"></div>\n' +
'                            <div class="text1">\n' +
'                                <p>' + route.rname + '</p>\n' +
'                                <br/>\n' +
'                                <p>' + route.routeIntroduce + '</p>\n' +
'                            </div>\n' +
'                            <div class="price">\n' +
'                                <p class="price_num">\n' +
'                                    <span>&yen;</span>\n' +
'                                    <span>'+route.price+'</span>\n' +
'                                    <span>起</span>\n' +
'                                </p>\n' +
'                                <p><a href="route_detail.html">查看详情</a></p>\n' +
'                            </div>\n' +
'                         </li>';
                route_lis += li;
            }
            $("#route").html(route_lis);

另外还需要控制导航栏的个数为10个，控制逻辑如下图：

修改分页页码的逻辑：

/*
    1.一共展示10个页码，能够达到前5后4的效果
    2.如果前边不够5个，后边补齐10个
    3.如果后边不足4个，前边补齐10个
*/
var begin;
var end;
if (pb.totalPage < 10){
    begin = 1;
    end = pb.totalPage;
}else {
    // 总页数超过10页
    begin = pb.currentPage - 5 ;
    end = pb.currentPage + 4 ;
    if (begin < 1){
        begin = 1;
        end = begin + 9;
    }
    if (end > pb.totalPage){
        end = pb.totalPage;
        begin = end - 9;
    }
}
for (var i = begin; i < end; i++) {
    var li;
    if ( i == pb.currentPage){
        li = '<li class="curPage" onclick="javascript:load(' + cid + ',' + i + ')"><a href="javascript:void(0)">' + i + '</a></li>';
    }else {
        li = '<li onclick="javascript:load(' + cid + ',' + i + ')"><a href="javascript:void(0)">' + i + '</a></li>';
    }
    lis += li;
}

定位到页面顶部：

window.scrollTo(0,0);

10 旅游线路名称查询

10.1 查询参数的传递

10.1.1 工具类 getParameter.js

用于获取路径中key对应的值

//根据传递过来的参数name获取对应的值
function getParameter(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i");
    var r = location.search.substr(1).match(reg);
    if (r!=null) return (r[2]); return null;
}

10.1.2 header.html

将输入的要搜索的数据放到网页链接后面

$("#search-button").click(function () {
    // 待搜索的线路名称
    var rname = $("#search-input").val();
    var cid = getParameter("cid");
    location.href = "http://localhost/travel/route_list.html?cid=" + cid + "&rname=" + rname;
});

10.1.3 route_list.html

获取cid和rname，注意如果要获取的是汉字，则需要进行一个解码

var cid = getParameter("cid");
var rname = getParameter("rname");
if (rname){
    rname = window.decodeURIComponent(rname);
}

10.2 修改后台代码

10.2.1 RouteServlet

RouteServlet 原先并没有接收rname参数，需要添加

注意：如果用的是tomcat7而不是8则需要处理一下中文乱码的问题

String rname = request.getParameter("rname");
rname = new String(rname.getBytes("iso-8859-1"),"utf-8");

// 调用service查询PageBean对象
PageBean<Route> pb = routeService.pageQuery(cid, currentPage, pageSize, rname);

10.2.2 修改service层

RouteServiceImpl.java

int totalCount = routeDao.findTotalCount(cid, rname);

List<Route> list = routeDao.findByPage(cid, start, pageSize, rname);

10.2.3 dao层

sql语句要根据是否有cid的值和是否有rname的值动态生成

package cn.itcast.travel.dao.impl;
import cn.itcast.travel.dao.RouteDao;
import cn.itcast.travel.domain.Route;
import cn.itcast.travel.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.ArrayList;
import java.util.List;
public class RouteDaoImpl implements RouteDao {
    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public int findTotalCount(int cid, String rname) {
        // String sql = "select count(*) from tab_route where cid = ?";
        String sql = " select count(*) from tab_route where 1 = 1 ";
        StringBuilder sb = new StringBuilder(sql);
        List params = new ArrayList();  // 问号对应的值
        if (cid != 0){
            sb.append(" and cid = ? ");
            params.add(cid);
        }
        if (rname != null && rname.length() > 0 && !"null".equals(rname)){
            sb.append(" and rname like ? ");
            params.add("%" + rname + "%");
        }
        sql = sb.toString();
        return template.queryForObject(sql, Integer.class, params.toArray());
    }
    @Override
    public List<Route> findByPage(int cid, int start, int pageSize, String rname) {
        String sql = " select * from tab_route where 1 = 1 ";
        StringBuilder sb = new StringBuilder(sql);
        List params = new ArrayList();  // 问号对应的值
        if (cid != 0){
            sb.append(" and cid = ? ");
            params.add(cid);
        }
        if (rname != null && rname.length() > 0 && !"null".equals(rname)){
            sb.append(" and rname like ? ");
            params.add("%" + rname + "%");
        }
        sb.append(" limit ? , ? ");
        params.add(start);
        params.add(pageSize);
        sql = sb.toString();
        return template.query(sql, new BeanPropertyRowMapper<>(Route.class), params.toArray());
    }
}

10.3 修改前台代码

当页面加载完成后，调用load()发送ajax请求，加载数据，此时应该过了一个请求参数rname

$(function () {
    var cid = getParameter("cid");
    var rname = getParameter("rname");
    if (rname){
        rname = window.decodeURIComponent(rname);
    }
    // 当页面加载完成后，调用load()发送ajax请求，加载数据
    load(cid, null, rname);
});

function load(cid, currentPage, rname) 部分代码（主要是调用load()时传入参数的改变）：

// 展示分页页码
var lis = "";
var firstPage = '<li onclick="javascript:load(' + cid + ',1,\'' + rname + '\')"><a href="javascript:void(0)">首页</a></li>';
var preNum = pb.currentPage - 1;
if (preNum <= 0)
    preNum = 1;
var prePage = '<li onclick="javascript:load(' + cid + ',' + preNum + ',\'' + rname + '\')" class="threeword"><a href="javascript:void(0)">上一页</a></li>';
lis += firstPage;
lis += prePage;

for (var i = begin; i < end; i++) {
    var li;
    if ( i == pb.currentPage){
        li = '<li class="curPage" onclick="javascript:load(' + cid + ',' + i + ',\'' + rname + '\')"><a href="javascript:void(0)">' + i + '</a></li>';
    }else {
        li = '<li onclick="javascript:load(' + cid + ',' + i + ',\'' + rname + '\')"><a href="javascript:void(0)">' + i + '</a></li>';
    }
    lis += li;
}
var nextNum = pb.currentPage + 1;
if (nextNum >= pb.totalPage)
    nextNum = pb.totalPage;
var nextPage = '<li onclick="javascript:load(' + cid + ',' + nextNum + ',\'' + rname + '\')" class="threeword"><a href="javascript:;">下一页</a></li>';
var lastPage = '<li onclick="javascript:load(' + cid + ',' + pb.totalPage + ',\'' + rname + '\')" class="threeword"><a href="javascript:void(0;">末页</a></li>';

11 旅游线路的详细展示

11.1 分析

需要查询三张表：route_img表、route表、seller表

用户点击查看详情后传入路线的id：rid，后台Servlet调用service层，从三张表中分别查出相应的信息，封装到Route对象中返回

11.2 后台代码

11.2.1 RouteServlet 中添加 findOne 方法

public void findOne(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    String rid = request.getParameter("rid");
    Route route = routeService.findOne(rid);
    writeValue(route, response);
}

11.2.2 RouteService 中添加 findOne 方法

实现从三个表中查询不同的数据，最终封装到Route类对象中并返回

public Route findOne(String rid) {
    // 查route表
    Route route = routeDao.findOne(Integer.parseInt(rid));
    // 查询route_img表，获得小图片集合信息
    List<RouteImg> routeImgList = routeImgDao.findByRid(route.getRid());
    route.setRouteImgList(routeImgList);
    // 查seller表，获得商家对象
    Seller seller = sellerDao.findById(route.getSid());
    route.setSeller(seller);
    return route;
}

11.2.3 RouteDaoImpl 中添加 findOne 方法

public Route findOne(int rid) {
    String sql = "select * from tab_route where rid = ?";
    return template.queryForObject(sql, new BeanPropertyRowMapper<Route>(Route.class), rid);
}

11.2.4 RouteImgDaoImpl

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);
}

11.2.5 SellerDaoImpl

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

11.3 前台代码

11.3.1 route_list.html

查看详情a标签的href要添加一个字段?rid=

<a href="route_detail.html?rid=' + route.rid + '">查看详情</a>

11.3.2 Route_detail.html

1.获取rid

2.发送ajax请求，获取route对象

.3.解析对象的数据

<script src="js/getParameter.js"></script>

$(document).ready(function() {
    //自动播放
    goImg();
    // var timer = setInterval("auto_play()", 5000);
});

function goImg() {
    //焦点图效果
    //点击图片切换图片
    $('.little_img').on('mousemove', function() {
        $('.little_img').removeClass('cur_img');
        var big_pic = $(this).data('bigpic');
        $('.big_img').attr('src', big_pic);
        $(this).addClass('cur_img');
    });
    //上下切换
    var picindex = 0;
    var nextindex = 4;
    $('.down_img').on('click',function(){
        var num = $('.little_img').length;
        if((nextindex + 1) <= num){
            $('.little_img:eq('+picindex+')').hide();
            $('.little_img:eq('+nextindex+')').show();
            picindex = picindex + 1;
            nextindex = nextindex + 1;
        }
    });
    $('.up_img').on('click',function(){
        var num = $('.little_img').length;
        if(picindex > 0){
            $('.little_img:eq('+(nextindex-1)+')').hide();
            $('.little_img:eq('+(picindex-1)+')').show();
            picindex = picindex - 1;
            nextindex = nextindex - 1;
        }
    });
}

$(function () {
    var rid = getParameter("rid");
    $.get("route/findOne", {rid: rid}, function (route) {
        $("#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);
        // 图片的展示
        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
        goImg();
    });
});

12 旅游线路收藏

12.1 分析

12.1.1 判断当前登录用户是否收藏过该线路

当页面加载完成后，发送ajax请求，获取用户是否收藏的标记

根据标记，展示不同的按钮样式

12.2 后台代码

12.2.1 dao

public class FavoriteDaoImpl implements FavoriteDao {
    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public Favorite findByRidAndUid(int rid, int uid) {
        Favorite favorite = null;
        try {
            String sql = "select * from tab_favorite where rid = ? and uid = ?";
            favorite = template.queryForObject(sql, new BeanPropertyRowMapper<>(Favorite.class), rid, uid);
        }catch (Exception e){
            e.printStackTrace();
        }
        return favorite;
    }
}

12.2.2 service

public class FavoriteServiceImpl implements FavoriteService {
    private FavoriteDao favoriteDao = new FavoriteDaoImpl();
    @Override
    public boolean isFavorite(String rid, int uid) {
        Favorite favorite = favoriteDao.findByRidAndUid(Integer.parseInt(rid), uid);
        return favorite != null;
    }
}

12.2.3 servlet

在 RouteServlet 中添加方法判断当前登陆的用户是否收藏过该线路

public void isFavorite(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    String rid = request.getParameter("rid");
    User user = (User)request.getSession().getAttribute("user");
    int uid;
    if (user == null){
        // 未登录
        uid = 0;
    }else {
        uid = user.getUid();
    }
    // 调用FavoriteService查询是否收藏
    boolean flag = favoriteService.isFavorite(rid, uid);
    writeValue(flag, response);
}

12.3 前端代码

12.3.1 Route_detail.html

$(function () {
    // 发送请求，判断用户是否收藏过该线路
    var rid = getParameter("rid");
    $.get("route/isFavorite", {rid: rid}, function (flag) {
        alert(flag);
        if (flag == true){
            // 用户收藏了
            $("#favorite").addClass("already");
        }else {
            $("#favorite").removeClass("already");
        }
    });
});

12.4 收藏次数

12.4.1 RouteServiceImpl

在该类的 findOne 方法中添加对收藏次数的封装

int count = favoriteDao.findCountByRid(route.getRid());
route.setCount(count);

12.4.2 FavoriteDaoImpl

dao层添加相应的方法

public int findCountByRid(int rid) {
    String sql = "select count(*) from tab_favorite where rid = ?";
    return template.queryForObject(sql, Integer.class, rid);
}

12.4.3 Route_detail.html

在数据展示部分添加收藏次数的展示

$("#favoriteCount").html("已收藏" + route.count + "次");

12.5 点击按钮实现 / 取消收藏

12.5.1 分析

12.5.2 RouteServlet

增加一个添加收藏的方法

public void addFavorite(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    String rid = request.getParameter("rid");
    User user = (User) request.getSession().getAttribute("user");
    int uid;
    if (user == null) {
        // 未登录
        return;
    } else {
        uid = user.getUid();
    }
    if (!favoriteService.isFavorite(rid, uid))
        favoriteService.add(rid, uid);
    else
        favoriteService.remove(rid, uid);
}

12.5.3 FavoriteService

@Override
public void add(String rid, int uid) {
    favoriteDao.add(Integer.parseInt(rid),uid);
}
@Override
public void remove(String rid, int uid) {
    favoriteDao.remove(Integer.parseInt(rid), uid);
}

12.5.4 FavoriteDao

@Override
public void add(int rid, int uid) {
    String sql = "insert into tab_favorite values(?,?,?)";
    template.update(sql,rid,new Date(),uid);
}
@Override
public void remove(int rid, int uid) {
    String sql = "delete from tab_favorite where rid = ? and uid = ?";
    template.update(sql, rid, uid);
}

12.5.5 前台 Route_detail.html

给<a>标签添加onclick方法如果要调用js代码，后面方法名一定要加括号！

onclick="addFavorite()"

// 点击收藏按钮
function addFavorite() {
    var rid = getParameter("rid");
    $.get("user/findOne",{},function (user) {
        if(user){
            $.get("route/addFavorite",{rid:rid},function () {
                // 刷新页面
                location.reload();
            });
        }else {
            alert("尚未登录，请先登录");
            location.href = "http://localhost/travel/login.html";
        }
    });
}

源码下载链接：https://download.csdn.net/download/HNU_Csee_wjw/12560408

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JavaWeb综合旅游网项目（三）