（5）.ssm下web

package com.web;

import com.bean.Users;
import com.dao.UsersMapper;
import com.service.UsersService;
import com.util.MybatisUtils;
import com.util.StringUtil;

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;
import java.util.Date;

@WebServlet(urlPatterns = "/user",name = "UsersServlet")
public class UsersServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String op = req.getParameter("op");
        if("login".equals(op)){
            login(req,resp);
        }else if("reg".equals(op)){
            reg(req,resp);
        }else if("toPassword".equals(op)){
            if(req.getSession().getAttribute("user")!=null){
                req.getRequestDispatcher("/WEB-INF/password.jsp").forward(req,resp);
            }else{
                req.getRequestDispatcher("/login.jsp").forward(req,resp);
            }
        }else if("doPassword".equals(op)){
            String pwd = StringUtil.requiredString("pwd","原有密码",req);
            String newpwd = StringUtil.requiredString("newpwd","新的密码",req);
            String repwd = StringUtil.requiredString("repwd","确认密码",req);
            // 原有密码是否正确？
            Users user = (Users) req.getSession().getAttribute("user");
            if(!user.getPwd().equals(pwd)){
                req.setAttribute("pwd_error","原有密码录入错误！");
                req.getRequestDispatcher("/WEB-INF/password.jsp").forward(req,resp);
                return;
            }
            // 两次录入的密码是否一致？
            if(!StringUtil.fieldsCompare("newpwd","repwd",req)){
                req.getRequestDispatcher("/WEB-INF/password.jsp").forward(req,resp);
                return;
            }
            // 修改密码是否成功？
            UsersService usersService = new UsersService();
            usersService.updatePassword(user,newpwd);
            // 跳转页面，提示成功？1、转到成功页面，2、javascript弹窗口提示
            StringUtil.showSuccess("操作成功！","/index.jsp",req,resp);
        }
        else{
            throw new ServletException("不支持的操作！");
        }
    }
    private void login(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String name = req.getParameter("account");
        String pwd = req.getParameter("pwd");
        UsersService usersService = new UsersService();
        Users user = usersService.login(name,pwd);
        if(user!=null){
            req.getSession().setAttribute("user",user);
            resp.sendRedirect("/index.jsp");
        }else{
            resp.sendRedirect("/login.jsp");
        }
    }
    private void reg(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String nickname = StringUtil.requiredString("nickname","用户名",req);
        String realname = StringUtil.requiredString("realname","真实姓名",req);
        String pwd = StringUtil.requiredString("pwd","密码",req);
        String repwd = StringUtil.requiredString("repwd","确认密码",req);
        String phone = StringUtil.requiredString("phone","电话",req);
        String email = StringUtil.requiredString("email","邮件",req);
        String address = req.getParameter("address");
        String realid = req.getParameter("realid");
        // 校验结果判断
        if(nickname == null ||
                realname == null ||
                pwd == null ||
                repwd == null ||
                phone == null ||
                email == null ||
                !StringUtil.fieldsCompare("pwd","repwd",req)
        ){
            req.getRequestDispatcher("/reg.jsp").forward(req,resp);
            return; // 一定要做
        }
        Users user = new Users(nickname,realname,pwd,phone,email,address,new Date(),
                1,realid);
        // 调用业务层进行数据库操作
        UsersService usersService = new UsersService();
        usersService.reg(user);
        // 重定向到登录页面
        resp.sendRedirect("/login.jsp");
    }
}

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登录</title>
  </head>
  <body>
  <p>登录</p>
  <h1>请登录</h1>
  <form action="/user" method="post">
    <input type="hidden" name="op" value="login"/>
    <p>用户名：<input type="text" name="account"></p>
    <p>密码：<input type="password" name="pwd"></p>
    <p><input type="submit" value="登录"></p>
  </form>
  </body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>首页</title>
  </head>
  <body>
  <p>首页</p>
  <h1>欢迎${user.nickname}登陆</h1>
  <ul>
    <li><a href= "/news/list">新闻</a></li>
    <!--<li><a href="/news?op=list">新闻1</a> </li>-->
  </ul>
  </body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
  <head>
    <title>新闻列表</title>
    <style type="text/css">
      .usersInfo{
        display:none;
        width:200px;
        background:#eee;
        border:1px solid #333;
        position:absolute;
      }
    </style>
    <script type="text/javascript" src="/js/jquery-1.8.3.min.js"></script>
    <script type="text/javascript">
        $(function(){
            // 保证页面加载完成后在执行
            // 选择器.动作
            $(".users").hover(function(){
                $(".usersInfo",this).css("display","block");
            },function(){
                $(".usersInfo",this).css("display","none");
            });
        });
    </script>
  </head>
  <body>
  <p><a href="/index.jsp">首页</a>/新闻</p>
    <h1>新闻列表</h1>
    <div>
      <div>全部结果> ${params.keywords} </div>
      <div>
        <table>
          <tr>
            <td>新闻分类</td>
            <td>
              <span><a ${params.category_id == null ? "style=\"color:red;\"":""}
                      href="/news?op=list&keywords=${params.keywords}&interval=${params.interval}">全部</a></span>&nbsp;
              <c:forEach items="${categorys}" var="category">
                <span>
                    <a  ${category.id == params.category_id ? "style=\"color:red;\"":""}
                        href="/news?op=list&category_id=${category.id}&keywords=${params.keywords}&interval=${params.interval}">
                    ${category.name}
                    </a>
                </span>&nbsp;
              </c:forEach>
            </td>
          </tr>
          <tr>
            <td>发布时间</td>
            <td>
              <span><a ${params.interval <= 0 || params.interval == null ? "style=\"color:red;\"":""}
                      href="/news?op=list&keywords=${params.keywords}&interval=0&category_id=${params.category_id}">最近</a></span>&nbsp;
              <span><a ${params.interval == 1 ? "style=\"color:red;\"":""}
                      href="/news?op=list&keywords=${params.keywords}&interval=1&category_id=${params.category_id}">1月内</a></span>&nbsp;
              <span><a ${params.interval == 3 ? "style=\"color:red;\"":""}
                      href="/news?op=list&keywords=${params.keywords}&interval=3&category_id=${params.category_id}">3月内</a></span>&nbsp;
              <span><a ${params.interval == 6 ? "style=\"color:red;\"":""}
                      href="/news?op=list&keywords=${params.keywords}&interval=6&category_id=${params.category_id}">半年内</a></span>&nbsp;
              <span><a ${params.interval == 12 ? "style=\"color:red;\"":""}
                      href="/news?op=list&keywords=${params.keywords}&interval=12&category_id=${params.category_id}">1年内</a></span>
            </td>
          </tr>
        </table>
      </div>
    </div>
    <table width="800" border="1">
      <tr>
        <th>编号</th>
        <th>标题</th>
        <th>内容</th>
        <th>关键字</th>
        <th>作者</th>
        <th>发布</th>
        <th>审批</th>
        <th>分类</th>
      </tr>
      <c:forEach items="${list}" var="news">
      <tr>
        <td><a href="/news?op=find&id=${news.id}">${news.id}</a></td>
        <td>${news.title}</td>
        <td>${news.content}</td>
        <td>${news.keywords}</td>
        <td class="users">${news.owner.nickname}
          <div class="usersInfo">
            <table>
              <tr>
                <td>账号</td>
                <td>${news.owner.nickname}</td>
              </tr>
              <tr>
                <td>姓名</td>
                <td>${news.owner.realname}</td>
              </tr>
              <tr>
                <td>电话</td>
                <td>${news.owner.phone}</td>
              </tr>
              <tr>
                <td>邮件</td>
                <td>${news.owner.email}</td>
              </tr>
              <tr>
                <td>地址</td>
                <td>${news.owner.address}</td>
              </tr>
            </table>
          </div>
        </td>
        <td>${news.pubtimeString}</td>
        <td>${news.checkUsersName}</td>
        <td>${news.categoryName}</td>
      </tr>
      </c:forEach>
    </table>
  </body>
</html>

        servlet中的定义：
　　　　　List<News> list=newDao.findAll();
        //将查询到的数据库信息存储得到“请求作用域”
        req.setAttribute("list",list);//其中前一个定义的是页面接收对象，须于页面中接收保持一致。
        req.getRequestDispatcher("/news/list.jsp").forward(req,resp);    

 <c:forEach items="${list}" var="news">  /*list是接收servlet中的对象，而var代表每次循环定义的对象*/
      <tr>
        <td>${news.id}</td>
        <td>${news.title}</td>
        <td>${news.content}</td>
        <td>${news.keywords}</td>
        <td>${news.usersId}</td>>
        <td>${news.pubtime}</td>
        <td>${news.checkUsersId}</td>
        <td>${news.categoryId}</td>
      </tr>
</c:forEach>