Java后台+数据库+Java web前端（新手）

实现简单页面上对数据的增删改查：Java后台+数据库表+Jsp前端网页设计

这里做一个简单的学生课程信息管理系统，做之前一定要先有自己的思路，要不然对新手来说，很容易乱的。

一.Java后台程序

可以分为三层：dao层（增删改查底层程序），service层，servlet层（网页与后台程序交互）

这三层之间，层层调用，环环相扣。

首先是写功能写的顺序分别是servlet，service，dao层：

先建立一个实体包，属性如下：

package src.entity;

public class types {

    private int id;
    private String name;
    private String teacher;
    private String classroom;
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getTeacher() {
        return teacher;
    }
    public void setTeacher(String teacher) {
        this.teacher = teacher;
    }
    public String getClassroom() {
        return classroom;
    }
    public void setClassroom(String classroom) {
        this.classroom = classroom;
    }
    
    public types() {}
    
    public types(int id, String name, String teacher, String classroom) {
        this.id = id;
        this.name = name;
        this.teacher = teacher;
        this.classroom = classroom;
    }
    
    public types(String name, String teacher, String classroom) {
        this.name = name;
        this.teacher = teacher;
        this.classroom = classroom;
    }
}

servlet层代码如下：

package src.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import src.entity.types;
import src.service.TypeService;

public class TypeServlet extends HttpServlet{
    private static final long serialVersionUID = 1L;

    TypeService ts=new TypeService();
    /**
     * 方法选择
     */
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        String method = req.getParameter("method");
        if ("add".equals(method)) {
            add(req, resp);
        } else if ("delete".equals(method)) {
            delete(req, resp);
        } else if ("update".equals(method)) {
            update(req, resp);
        } else if ("select".equals(method)) {
            select(req, resp);
        } else if ("byId".equals(method)) {
            byId(req, resp);
        } else if ("byName".equals(method)) {
            byName(req, resp);
        } else if ("list".equals(method)) {
            list(req, resp);
        }
    }

    /**
     * 添加
     * @param req
     * @param resp
     * @throws IOException 
     * @throws ServletException 
     */
    private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        String teacher = req.getParameter("teacher");
        String classroom = req.getParameter("classroom");
        types type= new types(name, teacher, classroom);
        
        //添加后消息显示
        if(ts.add(type)) {
            req.setAttribute("message", "添加成功");//setAttribute方法用于将内容保存在对象中，传到下一个页面中
            req.getRequestDispatcher("add.jsp").forward(req,resp);//getRequestDispatcher方法用于进入下一个页面
        } else {
            req.setAttribute("message", "课程名称重复，请重新录入");
            req.getRequestDispatcher("add.jsp").forward(req,resp);
        }
    }
    /**
     * 删除
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void delete(HttpServletRequest req, HttpServletResponse resp)throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        ts.delete(name);
        req.setAttribute("message", "课程信息删除成功");
        req.getRequestDispatcher("delete.jsp").forward(req,resp);
    }
    /**
     * 列表全部
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void list(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        List<types> type = ts.list();
        req.setAttribute("type",type);
        req.getRequestDispatcher("list.jsp").forward(req,resp);
    }
    /**
     * 通过ID得到type
     * 跳转至修改
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void byId(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        int id = Integer.parseInt(req.getParameter("id"));
        types type = ts.byId(id);
        req.setAttribute("type", type);
        req.getRequestDispatcher("detail.jsp").forward(req,resp);
    }
    /**
     * 通过名字查找
     * 跳转至删除
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void byName(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        types type = ts.byName(name);
        if(type == null) {
            req.setAttribute("message", "查无此课程！");
            req.getRequestDispatcher("delete.jsp").forward(req,resp);
        } else {
            req.setAttribute("type", type);
            req.getRequestDispatcher("detail2.jsp").forward(req,resp);
        }
    }
    /**
     * 修改
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        int id = Integer.parseInt(req.getParameter("id"));
        String name = req.getParameter("name");
        String teacher = req.getParameter("teacher");
        String classroom = req.getParameter("classroom");
        types type = new types(id, name, teacher, classroom);
        
        ts.update(type);
        req.setAttribute("message", "修改成功");
        req.getRequestDispatcher("TypeServlet?method=list").forward(req,resp);
    }
    /**
     * 查找
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void select(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        String teacher = req.getParameter("teacher");
        String classroom = req.getParameter("classroom");
        List<types> type = ts.select(name, teacher, classroom);
        req.setAttribute("type", type);
        req.getRequestDispatcher("selectlist.jsp").forward(req,resp);
    }
}

service层代码如下：

package src.service;
import java.util.List;

import src.dao.TypeDao;
import src.entity.types;
import src.service.TypeService;


public class TypeService{
    TypeDao cDao=new TypeDao();
    public  boolean add(types t) {
        boolean f=false;
        if(!cDao.name(t.getName())) {
            cDao.add(t);
            f=true;
        }
        return f;
    }
    public void delete(String name) {
         cDao.delete(name);
    }
    public void update(types t) {
        cDao.update(t);
    }
    /**
     * 通过ID得到一个Course
     * @return 
     */
    public types byId(int id) {
        return cDao.byId(id);
    }
    /**
     * 通过Name得到一个Course
     * @return 
     */
    public types byName(String name) {
        return cDao.byName(name);
    }
    /**
     * 查找
     * @return 
     */
    public List<types> select(String name, String teacher, String classroom) {
        return cDao.select(name, teacher, classroom);
    }
    /**
     * 全部数据
     * @return 
     */
    public List<types> list() {
        return cDao.list();
    }
}

Dao层代码如下：

package src.dao;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import src.entity.types;
import src.util.Shujuku;

public class TypeDao {
    public boolean add(types type) {//添加
        String sql = "insert into message(name, teacher, classroom) values('" + type.getName() + "','" + type.getTeacher() + "','" + type.getClassroom() + "')";
        Connection con =Shujuku.conn() ;
        Statement st= null;
        boolean f = false;
        int a = 0;
        
        try {
            st = con.createStatement();
            st.executeUpdate(sql);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(st, con);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }
    public boolean delete(String name) {//删除
        String sql="delete from message where name='"+name+"'";
        Connection con =Shujuku.conn() ;
        Statement st= null;
        boolean f = false;
        int a = 0;
        try {
            st = con.createStatement();
            st.executeUpdate(sql);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(st, con);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }
    public boolean update(types type) {//修改
        String sql="update type set name='"+type.getName()+"',teacher='"+type.getTeacher()+"', classroom='" + type.getClassroom()+ "' where id='" + type.getId() + "'";
        Connection con =Shujuku.conn() ;
        Statement st= null;
        boolean f = false;
        int a = 0;
        try {
            st = con.createStatement();
            st.executeUpdate(sql);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(st, con);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }
    /**
     * 通过id得到类
     * @param id
     * @return
     */
    public types byId(int id) {//按照id查询，返回一个types对象
        String sql = "select * from course where id ='" + id + "'";
        Connection con =Shujuku.conn() ;
        Statement st= null;
        ResultSet rs = null;//返回一个结果集
        types type=null;
        try {
            st = con.createStatement();
            rs = st.executeQuery(sql);
            while (rs.next()) {
                String name = rs.getString("name");
                String teacher = rs.getString("teacher");
                String classroom = rs.getString("classroom");
                type = new types(id, name, teacher, classroom);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(rs,st, con);
        }
        return type;
    }
    /**
     * 通过名字得到类
     * @param name
     * @return
     */
    public types byName(String name) {//按照名字查询基本与id查询一样，sql语句不同
        String sql = "select * from course where name ='" + name + "'";
        Connection con =Shujuku.conn() ;
        Statement st= null;
        ResultSet rs = null;
        types type=null;
        try {
            st = con.createStatement();
            rs = st.executeQuery(sql);
            while (rs.next()) {
                int id = rs.getInt("id");
                String teacher = rs.getString("teacher");
                String classroom = rs.getString("classroom");
                type = new types(id, name, teacher, classroom);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(rs,st, con);
        }
        return type;
    }
    
    public List<types> select(String name, String teacher, String classroom){//模糊查询
        String sql="select*from message where";
        if (name != "") {
            sql += "name like '%" + name + "%'";
        }
        if (teacher != "") {
            sql += "teacher like '%" + teacher + "%'";
        }
        if (classroom != "") {
            sql += "classroom like '%" + classroom + "%'";
        }
        List<types> list = new ArrayList<>();
        Connection con =Shujuku.conn() ;
        Statement st= null;
        ResultSet rs = null;
        try {
            st = con.createStatement();
            rs = st.executeQuery(sql);
            types bean=null;
            while (rs.next()) {
                int id = rs.getInt("id");
                String name2 = rs.getString("name");
                String teacher2 = rs.getString("teacher");
                String classroom2 = rs.getString("classroom");
                bean = new types(id, name2, teacher2, classroom2);
                list.add(bean);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(rs,st, con);
        }
        return list;
    }
    /**
     * 列表全部数据
     * @param name
     * @param teacher
     * @param classroom
     * @return
     */
    public List<types> list(){
        String sql = "select * from message";
        List<types> list = new ArrayList<>();
        Connection con =Shujuku.conn() ;
        Statement st= null;
        ResultSet rs = null;
        try {
            st = con.createStatement();
            rs = st.executeQuery(sql);
            types bean=null;
            while (rs.next()) {
                int id = rs.getInt("id");
                String name2 = rs.getString("name");
                String teacher2 = rs.getString("teacher");
                String classroom2 = rs.getString("classroom");
                bean = new types(id, name2, teacher2, classroom2);
                list.add(bean);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(rs,st, con);
        }
        return list;
    }
    /**
     * 验证课程名称是否唯一
     * true --- 不唯一
     * @param name
     * @return
     */
    public  boolean name(String name) {
        String sql = "select * from course where name ='" + name + "'";
        Connection con =Shujuku.conn() ;
        Statement st= null;
        ResultSet rs = null;
        boolean flag=false;
        try {
            st = con.createStatement();
            rs = st.executeQuery(sql);
            while (rs.next()) {
                flag = true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            Shujuku.close(rs,st, con);
        }
        return flag;
        
    }
}

数据库连接信息放在util包内：（我这里用的是sql server 2008r2）

import java.sql.Connection;
import java.sql.DriverManager;

public class Shujuku {
     public static Connection conn(){
         String url="jdbc:sqlserver://localhost:1433;DatabaseName=YourShujukuName";//填写你的数据库名
         String userName="sa";//填写你的用户名，我的是sa
         String userPwd="tzk19991029";//填写你的密码,我的是tzk19991029
         Connection con=null;

  try{
      Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
      System.out.println("加载驱动成功！");

  }catch(Exception e){

           e.printStackTrace();

           System.out.println("加载驱动失败！");
   }
 try{
    con=DriverManager.getConnection(url,userName,userPwd);
 System.out.println("连接数据库成功！");
 }catch(Exception e){
        e.printStackTrace();
        System.out.print("SQL Server连接失败！");
  }    
 return con;
}
}

二.数据库部分：设id为主键，自增为1

三.网页部分（这里只是简单操作，不美观）

index.jsp是首页，代码如下：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>首页</title>
<style >
.a{
        font-size: 26px;
        margin-top: 20px;
    }
</style>
</head>
<body>
<div align="center">
<h1 style="color: red;">课程基本信息管理系统</h1>
        <div class="a">
            <a href="add.jsp">课程信息录入</a>
        </div>
        <div class="a">
            <a href="TypeServlet?method=list">课程信息修改</a>
        </div>
        <div class="a">
            <a href="delete.jsp">课程信息删除</a>
        </div>
        <div class="a">
            <a href="select.jsp">课程信息查询</a>
        </div>
</div>
</body>
</html>

add.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: red;">课程信息录入</h1>
        <a href="index.jsp">返回主页</a>
        <form action="TypeServlet?method=add" method="post" onsubmit="return check()">
            <div >
                课程名称<input type="text" id="name" name="name"/>
            </div>
            <div >
                任课教师<input type="text" id="teacher" name="teacher" />
            </div>
            <div >
                上课地点<input type="text" id="classroom" name="classroom" />
            </div>
            <div >
                <button type="submit" >保&nbsp;&nbsp;&nbsp;存</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var name = document.getElementById("name");;
            var teacher = document.getElementById("teacher");
            var classroom = document.getElementById("classroom");
            
            //非空
            if(name.value == '') {
                alert('课程名称为空');
                name.focus();
                return false;
            }
            if(teacher.value == '') {
                alert('教师为空');
                teacher.focus();
                return false;
            }
            if(classroom.value == '') {
                alert('上课地点为空');
                classroom.focus();
                return false;
            }
            
            //教师
            if(teacher.value != '王建民' && teacher.value != '王辉' && teacher.value != '刘丹' && teacher.value != '刘立嘉' && teacher.value != '杨子光'){
                alert('教师名称错误');
                return false;
            }
            
            //教室
            if(!/^基教/.test(classroom.value) && !/^一教/.test(classroom.value) && !/^二教/.test(classroom.value) && !/^三教/.test(classroom.value)) {
                alert('上课地点错误');
                return false;
            }
        }
    </script>
</body>
</html>

delete.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>删除</title>
</head>
<body>
<%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: red;">课程信息删除</h1>
        <a href="index.jsp">返回主页</a>
        <form action="TypeServlet?method=byName" method="post" onsubmit="return check()">
            <div >
                课程名称<input type="text" id="name" name="name"/>
            </div>
            <div >
                <button type="submit" class="b">查&nbsp;&nbsp;&nbsp;找</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var name = document.getElementById("name");;
            
            //非空
            if(name.value == '') {
                alert('课程名称为空');
                name.focus();
                return false;
            }
        }
    </script>
</body>
</html>

select.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<div align="center">
        <h1 style="color: red;">课程信息查询</h1>
        <a href="index.jsp">返回主页</a>
        <form action="TypeServlet?method=select" method="post" onsubmit="return check()">
            <div >
                课程名称<input type="text" id="name" name="name"/>
            </div>
            <div >
                任课教师<input type="text" id="teacher" name="teacher" />
            </div>
            <div >
                上课地点<input type="text" id="classroom" name="classroom" />
            </div>
            <div >
                <button type="submit" class="b">查&nbsp;&nbsp;&nbsp;询</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var name = document.getElementById("name");;
            var teacher = document.getElementById("teacher");
            var classroom = document.getElementById("classroom");
            
            //非空
            if(name.value == '' && teacher.value == '' && classroom.value == '') {
                alert('请填写一个条件');
                return false;
            }
        }
    </script>
</body>
</html>

list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: red;">课程信息列表</h1>
        <a href="index.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>id</td>
                <td>课程名称</td>
                <td>任课教师</td>
                <td>上课地点</td>
                <td align="center" colspan="2">操作</td>
            </tr>
            <c:forEach items="${courses}" var="item">
                <tr>
                    <td>${item.id}</td>
                    <td>${item.name}</td>
                    <td>${item.teacher}</td>
                    <td>${item.classroom}</td>
                    <td><a href="TypeServlet?method=byId&id=${item.id}">修改</a></td>
                </tr>
            </c:forEach>
        </table>
    </div>
</body>
</html>

selectlist.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<div align="center">
        <h1 style="color: red;">课程信息列表</h1>
        <a href="index.jsp">返回主页</a>
        <table >
            <tr>
                <td>id</td>
                <td>课程名称</td>
                <td>任课教师</td>
                <td>上课地点</td>
            </tr>
            <!-- forEach遍历出adminBeans -->
            <c:forEach items="${types}" var="item" varStatus="status">
                <tr>
                    <td>${item.id}</td>
                    <td><a>${item.name}</a></td>
                    <td>${item.teacher}</td>
                    <td>${item.classroom}</td>
                </tr>
            </c:forEach>
        </table>
    </div>
</body>
</html>

detail.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: red;">课程信息修改</h1>
        <a href="index.jsp">返回主页</a>
        <form action="TypeServlet?method=update" method="post" onsubmit="return check()">
            <div >
                课程名称<input type="text" id="name" name="name" value="${type.name}"/>
            </div>
            <div >
                任课教师<input type="text" id="teacher" name="teacher" value="${type.teacher}"/>
            </div>
            <div >
                上课地点<input type="text" id="classroom" name="classroom" value="${type.classroom}"/>
            </div>
            <input type="hidden" id="id" name="id" value="${type.id}"/>
            <div >
                <button type="submit" class="b">修&nbsp;&nbsp;&nbsp;改</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var name = document.getElementById("name");;
            var teacher = document.getElementById("teacher");
            var classroom = document.getElementById("classroom");
            
            //非空
            if(name.value == '') {
                alert('课程名称为空');
                name.focus();
                return false;
            }
            if(teacher.value == '') {
                alert('教师为空');
                teacher.focus();
                return false;
            }
            if(classroom.value == '') {
                alert('上课地点为空');
                classroom.focus();
                return false;
            }
            
            //教师
            if(teacher.value != '王建民' && teacher.value != '王辉' && teacher.value != '刘丹' && teacher.value != '刘立嘉' && teacher.value != '杨子光'){
                alert('教师名称错误');
                return false;
            }
            
            //教室
            if(!/^基教/.test(classroom.value) && !/^一教/.test(classroom.value) && !/^二教/.test(classroom.value) && !/^三教/.test(classroom.value)) {
                alert('上课地点错误');
                return false;
            }
        }
    </script>
</body>
</html>

deetail2.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<div align="center">
        <h1 style="color: red;">课程信息删除</h1>
        <a href="index.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>课程名称</td>
                <td>${type.name}</td>
            </tr>
            <tr>
                <td>任课教师</td>
                <td>${type.teacher}</td>
            </tr>
            <tr>
                <td>上课地点</td>
                <td>${type.classroom}</td>
            </tr>
        </table>
        <div class="a">
            <a onclick="return check()" href="TypeServlet?method=delete&id=${type.id}">删&nbsp;&nbsp;&nbsp;除</a>
        </div>
    </div>
    <script type="text/javascript">
        function check() {
            if (confirm("真的要删除吗？")){
                return true;
            }else{
                return false;
            }
        }
    </script>
</body>
</html>

注意：WebContent/WEN-INF/lib包下需要放置jstl.jar包和standard.jar包。可自行去网上下载。

Java后台+数据库+Java web前端（新手）

猜你喜欢