20151210--MVC
package com.hanqi; import java.io.IOException;
import java.sql.*;
import java.text.SimpleDateFormat; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.omg.PortableInterceptor.RequestInfoOperations; import com.hanqi.*;
import com.hanqi.dao.User;
import com.hanqi.dao.UserDal; import java.util.*;
import java.util.Date;
/**
* Servlet implementation class SaveUser
*/
public class SaveUser extends HttpServlet {
private static final long serialVersionUID = 1L;
private User user; /**
* @see HttpServlet#HttpServlet()
*/
public SaveUser() {
super();
// TODO Auto-generated constructor stub
} /**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //转码，固定写法
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.setCharacterEncoding("UTF-8"); Date dt = new Date();//获取当前时间
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//格式化时间
String sj = sdf.format(dt);//将时间转换为字符串格式 //获取内容
String userID = request.getParameter("userid");
String userName = request.getParameter("username");
String pw = request.getParameter("password");
//判断输入的内容
if(userID == null || userID.trim().length() == 0)
{
//输出内容
response.getWriter().append("用户代码不能为空");
}
else if(userName == null || userName.trim().length() == 0)
{
response.getWriter().append("用户姓名不能为空");
}
else
{ User user = new User(); user.setUserid(userID);
user.setUsername(userName);
user.setPassword(pw);
user.setuserTime(sj); //调用模型层 UserDal ud = new UserDal(); try { ud.insert(user); response.sendRedirect("FindUserList"); } catch (Exception e) { response.getWriter().append("保存数据失败"); e.printStackTrace();
}
}
} /**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
} }
增加
package com.hanqi; import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import com.hanqi.common.DBHelper; import java.sql.*;
import java.util.Date;
import com.hanqi.dao.*; /**
* Servlet implementation class DeleteUser
*/
public class DeleteUser extends HttpServlet {
private static final long serialVersionUID = 1L; /**
* @see HttpServlet#HttpServlet()
*/
public DeleteUser() {
super();
// TODO Auto-generated constructor stub
} /**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //转码
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.setCharacterEncoding("UTF-8"); String userid = request.getParameter("userid");
if(userid != null && userid.trim().length() > 0)
{
UserDal ud = new UserDal(); try { ud.delete(userid); response.sendRedirect("FindUserList"); } catch (Exception e) { response.getWriter().append("删除数据失败"); e.printStackTrace();
}
}
} /**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
} }
删除
package com.hanqi; import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import com.hanqi.common.DBHelper;
import com.hanqi.dao.User;
import com.hanqi.dao.UserDal; /**
* Servlet implementation class EditUser
*/
public class EditUser extends HttpServlet {
private static final long serialVersionUID = 1L; /**
* @see HttpServlet#HttpServlet()
*/
public EditUser() {
super();
// TODO Auto-generated constructor stub
} /**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.setCharacterEncoding("UTF-8"); //接受相关参数
String userID = request.getParameter("userid");
String userName = request.getParameter("username");
String pw = request.getParameter("password");
//判断输入的内容
if(userID == null || userID.trim().length() == 0)
{
//输出内容
response.getWriter().append("用户代码不能为空");
}
else if(userName == null || userName.trim().length() == 0)
{
response.getWriter().append("用户姓名不能为空");
}
else
{
User user = new User(); user.setUserid(userID);
user.setUsername(userName);
user.setPassword(pw); UserDal ud = new UserDal(); try
{ ud.update(user); response.sendRedirect("FindUserList"); }
catch(Exception e)
{ response.getWriter().append("修改数据失败"); e.printStackTrace();
}
} } /**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
} }
修改
package com.hanqi; import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.*; import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import com.hanqi.dao.User;
import com.hanqi.dao.UserDal; /**
* Servlet implementation class FindUserList
*/
public class FindUserList extends HttpServlet {
private static final long serialVersionUID = 1L; /**
* @see HttpServlet#HttpServlet()
*/
public FindUserList() {
super();
// TODO Auto-generated constructor stub
} /**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
UserDal ud = new UserDal();
try
{
ArrayList<User> al = ud.getListAll();
request.setAttribute("userlist", al);
}
catch(Exception e)
{
response.getWriter().append("查找数据失败");
e.printStackTrace();
} //页面跳转
request.getRequestDispatcher("ShowUserList.jsp").forward(request,response); } /**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
} }
查找
package com.hanqi.dao; import java.sql.*;
import java.util.ArrayList; import com.hanqi.common.*; //关于User表的数据库操作类
public class UserDal
{ //增
public int insert(User user) throws Exception
{
int rtn = -1; Connection conn = DBHelper.getConnection(); PreparedStatement pst = null; if (conn != null)
{
try{
String sql = "insert into T_User (user_id, user_name, password,user_time) values (?,?,?,?) "; pst = conn.prepareStatement(sql); pst.setString(1, user.getUserid());
pst.setString(2, user.getUsername());
pst.setString(3, user.getPassword());
pst.setString(4, user.getuserTime());
rtn = pst.executeUpdate();
}
catch(Exception ex)
{
throw ex;
}
finally
{
try
{
pst.close();
}
catch(Exception e)
{
conn.close();
}
}
} return rtn;
} //删 public int delete(String user_id) throws Exception
{
int rtn = -1; Connection conn = DBHelper.getConnection(); PreparedStatement pst = null; if (conn != null)
{
try{
String sql = "delete T_User where user_id = ?"; pst = conn.prepareStatement(sql); pst.setString(1, user_id); rtn = pst.executeUpdate();
}
catch(Exception ex)
{
throw ex;
}
finally
{
try
{
pst.close();
}
catch(Exception e)
{
conn.close();
}
}
} return rtn;
} //改
public int update(User user) throws Exception
{
int rtn = -1; Connection conn = DBHelper.getConnection(); PreparedStatement pst = null; if (conn != null)
{
try
{
String sql = "update T_User set user_name = ?,password = ? "
+ "where user_id = ? "; pst = conn.prepareStatement(sql); pst.setString(3, user.getUserid());
pst.setString(1, user.getUsername());
pst.setString(2, user.getPassword()); rtn = pst.executeUpdate();
}
catch(Exception ex)
{
throw ex;
}
finally
{
try
{
pst.close();
}
catch(Exception e)
{
conn.close();
}
}
} return rtn;
} //查
public ArrayList<User> getListAll() throws Exception
{
ArrayList<User> rtn = new ArrayList<User>(); Connection conn = DBHelper.getConnection(); PreparedStatement pst = null; if (conn != null)
{
try
{ String sql = "select * from t_user"; pst = conn.prepareStatement(sql); ResultSet rs = pst.executeQuery();
if(rs != null)
{
while(rs.next())
{
User u = new User(); u.setUserid(rs.getString("user_id"));
u.setUsername(rs.getString("user_name"));
u.setPassword(rs.getString("password"));
u.setuserTime(rs.getString("user_time"));
rtn.add(u); //取一个数就放一个数
}
}
}
catch(Exception ex)
{
throw ex;
}
finally
{
try
{
pst.close();
}
catch(Exception e)
{
conn.close();
}
}
}
return rtn;
}
}
M
20151210--MVC的更多相关文章
- Asp.Net Mvc 使用WebUploader 多图片上传
来博客园有一个月了,哈哈.在这里学到了很多东西.今天也来试着分享一下学到的东西.希望能和大家做朋友共同进步. 最近由于项目需要上传多张图片,对于我这只菜鸟来说,以前上传图片都是直接拖得控件啊,而且还是 ...
- .Net Core MVC 网站开发（Ninesky） 2.4、添加栏目与异步方法
在2.3中完成依赖注入后,这次主要实现栏目的添加功能.按照前面思路栏目有三种类型,常规栏目即可以添加子栏目也可以选择是否添加内容,内容又可以分文章或其他类型,所以还要添加一个模块功能.这次主要实现栏目 ...
- ASP.NET MVC with Entity Framework and CSS一书翻译系列文章之第二章：利用模型类创建视图、控制器和数据库
在这一章中,我们将直接进入项目,并且为产品和分类添加一些基本的模型类.我们将在Entity Framework的代码优先模式下,利用这些模型类创建一个数据库.我们还将学习如何在代码中创建数据库上下文类 ...
- ASP.NET Core MVC/WebAPi 模型绑定探索
前言 相信一直关注我的园友都知道,我写的博文都没有特别枯燥理论性的东西,主要是当每开启一门新的技术之旅时,刚开始就直接去看底层实现原理,第一会感觉索然无味,第二也不明白到底为何要这样做,所以只有当你用 ...
- ASP.NET Core 中文文档 第四章 MVC（3.8）视图中的依赖注入
原文:Dependency injection into views 作者:Steve Smith 翻译:姚阿勇(Dr.Yao) 校对:孟帅洋(书缘) ASP.NET Core 支持在视图中使用 依赖 ...
- 开源：Taurus.MVC 框架
为什么要创造Taurus.MVC: 记得被上一家公司忽悠去负责公司电商平台的时候,情况是这样的: 项目原版是外包给第三方的,使用:WebForm+NHibernate,代码不堪入目,Bug无限,经常点 ...
- Taurus.MVC 2.2 开源发布：WebAPI 功能增强（请求跨域及Json转换）
背景: 1:有用户反馈了关于跨域请求的问题. 2:有用户反馈了参数获取的问题. 3:JsonHelper的增强. 在综合上面的条件下,有了2.2版本的更新,也因此写了此文. 开源地址: https:/ ...
- Taurus.MVC 2.0 开源发布：WebAPI开发教程
背景: 有用户反映,Tausus.MVC 能写WebAPI么? 能! 教程呢? 嗯,木有! 好吧,刚好2.0出来,就带上WEBAPI教程了! 开源地址: https://github.com/cyq1 ...
- 使用Visual Studio 2015 开发ASP.NET MVC 5 项目部署到Mono/Jexus
最新的Mono 4.4已经支持运行asp.net mvc5项目,有的同学听了这句话就兴高采烈的拿起Visual Studio 2015创建了一个mvc 5的项目,然后部署到Mono上,浏览下发现一堆错 ...
- .NetCore MVC中的路由（2）在路由中使用约束
p { margin-bottom: 0.25cm; direction: ltr; color: #000000; line-height: 120%; orphans: 2; widows: 2 ...
随机推荐
- Codeforces Round #312 (Div. 2) ABC题解
[比赛链接]click here~~ A. Lala Land and Apple Trees: [题意]: AMR住在拉拉土地. 拉拉土地是一个很漂亮的国家,位于坐标线.拉拉土地是与著名的苹果树越来 ...
- 设计师Yoyo：为用户设计产品，让他们生活更美好
Yoyo设计走过的路:纽约爱立信,西雅图美国在线,硅谷雅虎,ATT,深圳腾讯,华为:Yoyo不仅是顶级的交互体验设计师,还是很Open的知识分享者,从职业选择,以及对年轻人的建议几个角度,摘录他的文章 ...
- 告示：CSDN博客通道支持Windows Live Writer写blog离线好友
尊敬的各位CSDN用户: 您好! 为了更好的服务客户.CSDN已经支持Windows Live Writer离线写博客啦.Windows Live Writer于2014年5月29日正式上线啦!欢迎大 ...
- Java基础笔记-异常总结,包
异常:是对问题的描述,将问题进行对象封装, 异常的体系: Throwable: 1.Error 2.Exception 1.RuntimeException 异常体系的特点: 异常体系中的所有类以及建 ...
- win server 2003 将MBR转为GPT突破硬盘2TB的限制（附微软磁盘科普）
备注:https://technet.microsoft.com/zh-cn/library/cc773223.aspx GUID 分区表 与支持最大卷为 2 TB (terabytes) 并且每个磁 ...
- 《高性能JavaScript》的新征程
已经学了<JavaScript语言精粹>,现在学高性能. JS的出现是为了改善网页用户体验的,随着互联网通信速度的改善.计算机性能的提升,web越发丰富:但一段时间内,JS的引擎变化不大. ...
- Android 自定义shape圆形按钮
Shape的属性: solid 描述:内部填充 属性:android:color 填充颜色 size 描述:大小 属性: android:width 宽 android:height 高 gradie ...
- Apache Spark2.0正式发布
Apache Spark2.0正式发布 7月26日起Databricks开始提供Apache Spark 2.0的下载,这个版本是基于社区在过去两年的经验总结而成,不但加入了用户喜爱的功能,也修复了之 ...
- 算法分析-堆排序 HeapSort 优先级队列
堆排序的是集合了插入排序的单数组操作,又有归并排序的时间复杂度,完美的结合了2者的优点. 堆的定义 n个元素的序列{k1,k2,…,kn}当且仅当满足下列关系之一时,称之为堆. 情形1:ki < ...
- 动态规划-Burst Balloons
Burst Balloons Given n balloons, indexed from 0 to n-1. Each balloon is painted with a number on it ...