TYUT太原理工大学2022javaweb编程大题 - 博客

MVC操作（30分）

编程题就是给你一个表，几个jsp页面的显示图，让你根据题意写出MVC编码

其中，MVC包含了3部分：

1、视图（V）——编写jsp页面（HTML、CSS代码）

2、模型（M）——编写javabean.java（字符串处理、数据库操作）

3、控制器（C）——编写servlet.java（封装对HTTP请求的处理）

主要出的题型就这么几类：用户注册、用户登录、用户留言、图书管理

题目简单的话，只会要求我们补充MVC，难一点的话会让我们写全部的MVC，这次大题30分，估计难一点

大家能理解的理解，理解不了就背下来（都是手打的代码，难免出错，出错的代码段大家评论区告我）

用户留言：

1、jsp：

（1）addMessage.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8" %> <html> <head> <title>网页左上角要写的标题</title> </head> <body>
<h3>用户留言</h3> <form action="MessageServlet" method="post"> 昵称：<input
type="text" name="nickname" /><br/><br/> 主题：<input type="text" name="title"
/><br/><br/> 内容：<br/> <textarea rows="5" cols="25"
name="content"></textarea><br/><br/> <input type="submit" value="留言"/> <input
type="reset" value="重置"/> </form> </body> </html>
（2）addMessageSuccess.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8" %> <html> <head> <title>网页左上角要写的标题</title> </head> <body>
<h3>添加留言成功！<a href="addMessage.jsp">再次留言</a></h3> </body> </html>
2、javabean:
import java.sql.*; public class MessageBean{ private Integer id; private
String nickname; private String title; private String content; public Integer
getId(){ return id; } public void setId(Integer id){ this.id=id; } public
String getNickname(){ return nickname; } public void setNickname(String
nickname){ this.nickname=nickname; } //......剩下的getter和setter方法省略，考试自己写上 public
boolean addMessage(MessageBean message){ Integer id=message.getId(); String
title=message.getTitle(); //......剩下两个省略，考试写 try{
Class.forName("com.mysql.jdbc.Driver"); String
url="jdbc:mysql://localhost:3306/jdbc1"; Connection
conn=DriverManager.getConnection(url,"root","123"); String sql="insert into
message(nickname,title,content)values(?,?,?)" PreparedStatement
ps=conn.prepareStatement(sql); ps.setString(1,nickname); ps.setString(2,title);
ps.setString(3,content); int result=ps.executeUpdate(); if(result>0) return
turn; else return false; }catch(Exception e) {e.printStackTrace();} return
false; } } }
3、servlet：
import java.io.IOException; import javax.servlet.*; import
edu.tyut.bean.MessageBean; @WebServlet("/MessageServlet") public class
MessageServlet extends HttpServlet{ protected void doGet(HttpServletRequest
request,HttpServletResponse response)throws ServletException,IOException{
request.setCharacterEncoding("UTF-8"); String
nickname=request.getParameter("nickname"); String
title=request.getParameter("title"); String
content=request.getParameter("content"); MessageBean message=new MessageBean();
message.setNickname(nickname); message.setTitle(title);
message.setContent(content); boolean result=message.addMessage(message);
if(result) response.sendRedirect("addMessageSuccess.jsp"); else
response.sendRedirect("addMessage.jsp"); } protected void
doGet(HttpServletRequest request,HttpServletResponse)throws
ServletException,IOException{ doGet(request,response); } }
用户注册：

1、jsp：

（1）register.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8" %> <html> <head> <title>网页左上角要写的标题</title> </head> <body>
<h3>用户注册</h3> <form action="RegisterServlet" method="post"> 用户名：<input
type="text" name="name" /><br/><br/> 密码：<input type="text" name="password"
/><br/><br/> <input type="submit" value="提交"/> <input type="reset" value="重置"/>
</form> </body> </html>
（2）welcome.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8" %> <html> <head> <title>网页左上角要写的标题</title> </head> <body>
<h3>注册成功<a href="register.jsp">再次注册</a></h3> </body> </html>
2、javabean:
import java.sql.*; public class UserBean{ private Integer id; private String
name; private String password; public Integer getId(){ return id; } public void
setId(Integer id){ this.id=id; } public String getName(){ return name; } public
void setName(String name){ this.name=name; } public String getPassword(){
return password; } public void setPassword(String password){
this.password=password; } public boolean insortUser(UserBean user){ Integer
id=user.getId(); String name=user.getName(); String
password=user.getPassword(); try{ Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:3306/jdbc1"; Connection
conn=DriverManager.getConnection(url,"root","123"); String sql="insert into
user(name,password)values(?,?)" PreparedStatement
ps=conn.prepareStatement(sql); ps.setString(1,name); ps.setString(2,password);
int result=ps.executeUpdate(); if(result>0) return turn; else return false;
}catch(Exception e) {e.printStackTrace();} return false; } } }
3、servlet：
import java.io.IOException; import javax.servlet.*; import
edu.tyut.bean.RegisterServlet; @WebServlet("/RegisterServlet") public class
RegisterServlet extends HttpServlet{ protected void doGet(HttpServletRequest
request,HttpServletResponse response)throws ServletException,IOException{
request.setCharacterEncoding("UTF-8"); String
name=request.getParameter("name"); String
password=request.getParameter("password"); UserBean user=new UserBean();
user.setName(name); user.setPassword(password); boolean
result=user.register(user); if(result) response.sendRedirect("welcome.jsp");
else response.sendRedirect("register.jsp"); } protected void
doGet(HttpServletRequest request,HttpServletResponse)throws
ServletException,IOException{ doGet(request,response); } }
用户登录：

1、jsp：

（1）login.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8" %> <html> <head> <title>网页左上角要写的标题</title> </head> <body>
<h3>用户登录</h3> <form action="LoginServlet" method="post"> 用户名：<input type="text"
name="name" /><br/><br/> 密码：<input type="text" name="password" /><br/><br/>
<input type="submit" value="登录"/> <input type="reset" value="重置"/> </form>
</body> </html>
（2）

loginSuccess.jsp:
<%@ page language="java" contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8" %> <html> <head> <title>网页左上角要写的标题</title> </head> <body>
<h3>登录成功<a href="login.jsp">再次注册</a></h3> </body> </html>
2、javabean:
import java.sql.*; public class UserBean{ private Integer id; private String
name; private String password; public Integer getId(){ return id; } public void
setId(Integer id){ this.id=id; } public String getName(){ return name; } public
void setName(String name){ this.name=name; } public String getPassword(){
return password; } public void setPassword(String password){
this.password=password; } public boolean loginUser(UserBean user){ Integer
id=user.getId(); String name=user.getName(); String
password=user.getPassword(); try{ Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:3306/jdbc1"; Connection
conn=DriverManager.getConnection(url,"root","123"); String sql="insert into
user(name,password)values(?,?)" PreparedStatement
ps=conn.prepareStatement(sql); ps.setString(1,name); ps.setString(2,password);
int result=ps.executeUpdate(); if(result>0) return turn; else return false;
}catch(Exception e) {e.printStackTrace();} return false; } } }
3、servlet：
import java.io.IOException; import javax.servlet.*; import
edu.tyut.bean.LoginServlet; @WebServlet("/LoginServlet") public class
LoginServlet extends HttpServlet{ protected void doGet(HttpServletRequest
request,HttpServletResponse response)throws ServletException,IOException{
request.setCharacterEncoding("UTF-8"); String
name=request.getParameter("name"); String
password=request.getParameter("password"); UserBean user=new UserBean();
user.setName(name); user.setPassword(password); boolean
result=user.register(user); if(result)
response.sendRedirect("loginSuccess.jsp"); else
response.sendRedirect("login.jsp"); } protected void doGet(HttpServletRequest
request,HttpServletResponse)throws ServletException,IOException{
doGet(request,response); } }
整体看下来，其实MVC的题型大同小异，我们只需要根据题意，将几个必要的参数修改即可

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