eclipse+jsp+servlet+sqlserver+tomcat实现增删改查的一个小项目(超详细教程)
哈喽，大家好，我是冷风，，拖延了一天，实在是太抱歉(虽然也没多少人看我的博客，哈哈)
这个小项目我一共花了五天的时间才把它的功能给完成，因为个人原因，学过的知识已经丢了两年，不过我会在最短的时间学习到足以通过8k的java程序员面试。
eclipseWeb项目结构
第一步下载需要使用的工具
eclipse( 版本为2019-06 (4.12.0))，下载链接Eclipse Downloads | The Eclipse Foundation
tomcat(版本为9.0)，下载链接Apache Tomcat® - Apache Tomcat 9 Software Downloads
jdk(版本为jre1.8.0_152)，下载链接Java Downloads | Oracle
sqlserver(版本为2019)，下载链接SQL Server 下载 | Microsoft
eclipse为开发工具，jdk为java的开发环境以及运行环境，sqlserver为数据库，tomcat为服务器
第二步设置以及配置
将jdk下载安装后，进行环境变量的配置（不配置的话eclipse打不开的哦），sqlserver数据库下载后创建个用户用来登陆，tomcat下载好后导入eclipse里就行了。
第三步开始使用css，html，js，jquey，bootstrap画web页面（我做的是一个记事管理系统，页面截图如下）
登陆页面（不足的功能：登陆要做一个验证图形码，以及还有忘记密码按钮(使用密保来修改密码)，登录按钮配色不行）
login.jsp页面代码
登录与注册 记事管理系统(Login)
+ if($("#checklogin").val()=="error"){alert("您的账号或密码有误!请重新输入");$(this).val("qwer");};$("#registration").click(function(){window.location.href="${pageContext.request.contextPath}/register";}); 注册页面（不足的功能：密保也需要做出来）
register.jsp页面代码
登录与注册 记事管理系统(Register)
+ $(".login").click(function(){window.location.href="${pageContext.request.contextPath}/login";});if($("#register").val()!=$("#register_a").val()){if($("#register").val()=="OK"){alert("注册成功,点击确认返回登陆页面");window.location.href="${pageContext.request.contextPath}/login";}else{alert("注册失败");}} 输入账号密码登陆进去后的主界面（不足的地方：界面丑）
index.jsp页面代码
左侧导航 body{margin:0;padding:0;overflow-x:hidden;}html, body{height:100%;}img{border:none;}*{font-family:'微软雅黑';font-size:12px;color:#626262;}dl,dt,dd{display:block;margin:0;}a{text-decoration:none;}#bg{background-image:url(images/content/dotted.png);}.container{width:100%;height:100%;margin:auto;}/*left*/.leftsidebar_box{width:160px;height:auto !important;overflow:visible !important;position:fixed;height:100% !important;background-color:#3992d0;}.line{height:2px;width:100%;background-image:url(images/left/line_bg.png);background-repeat:repeat-x;}.leftsidebar_box dt{padding-left:40px;padding-right:10px;background-repeat:no-repeat;background-position:10px center;color:#f5f5f5;font-size:14px;position:relative;line-height:48px;cursor:pointer;}.leftsidebar_box dd{background-color:#317eb4;padding-left:40px;}.leftsidebar_box dd a{color:#f5f5f5;line-height:20px;}.leftsidebar_box dt img{position:absolute;right:10px;top:20px;}.system_log dt{background-image:url(images/left/system.png)}.custom dt{background-image:url(images/left/custom.png)}.channel dt{background-image:url(images/left/channel.png)}.app dt{background-image:url(images/left/app.png)}.cloud dt{background-image:url(images/left/cloud.png)}.syetem_management dt{background-image:url(images/left/syetem_management.png)}.source dt{background-image:url(images/left/source.png)}.statistics dt{background-image:url(images/left/statistics.png)}.leftsidebar_box dl dd:last-child{padding-bottom:10px;}if($("#checklogin").val()=="OK"){alert("欢迎使用记事系统!");$(this).val("qwer");}$(".leftsidebar_box dt").css({"background-color":"#3992d0"});$(".leftsidebar_box dt img").attr("src","images/left/select_xl01.png");$(function(){$(".leftsidebar_box dd").hide();$(".leftsidebar_box dt").click(function(){$(".leftsidebar_box dt").css({"background-color":"#3992d0"})$(this).css({"background-color": "#317eb4"});$(this).parent().find('dd').removeClass("menu_chioce");$(".leftsidebar_box dt img").attr("src","images/left/select_xl01.png");$(this).parent().find('img').attr("src","images/left/select_xl.png");$(".menu_chioce").slideUp(); $(this).parent().find('dd').slideToggle();$(this).parent().find('dd').addClass("menu_chioce");});}) function qiehuan(obj){ if($(obj).text()=="查询事件"){ $("#dd").attr("src","${pageContext.request.contextPath}/deleteEven?userid="+$("#userid").val()); }else if($(obj).text()=="新增事件"){ $("#dd").attr("src","${pageContext.request.contextPath}/addEvent"); }else if($(obj).text()=="用户信息"){ $("#dd").attr("src","${pageContext.request.contextPath}/user/query?userid="+$("#userid").val()); } }.png)
查询登陆后用户信息功能（不足的地方：界面丑，以及密码不应该直接显示出来，还有密保应该用多个，不单单是一个，头像没与sqlserver数据库进行交互）
UserInformation.jsp页面代码
用户详情 
用户名：密 码：密 保：$(".update").click(function(){window.location.href="${pageContext.request.contextPath}/user/query?userid="+$("#userid").val()+"&name="+$(".name").val()+"&password="+$(".password").val()+"&secretguard="+$(".secretguard").val()+"&updates=updateuser";});if($("#update").val()!=$("#update_a").val()){if($("#update").val()=="ok"){alert("修改成功！");}else{alert("修改失败！");}}查询当前登录用户的事件信息（不足的地方：界面丑，以及记录时间与事件发生时间的时间未转换为我们常见的格式，重要事件置顶功能没做，查询栏不应该只有标题的模糊查询，还有很多，大家可以看下我使用Axure RP8画的原型图）
删除的话点击一下按钮这条信息就没了
查询事件信息原型图
QueryEvents.jsp页面代码
查询事件 .search{float: left;}查询事件
标题查询:<!-- 选择相关人员 2 3 4 5 选择事件类型 2 3 4 5 --><!-- 选择重要级别 2 3 4 5 --><!-- 指定 date标记选择开始时间： --><!-- 选择结束时间： -->编号 标题 事件内容 相关人员 事件类型 重要级别 记录时间 事件发生时间 操作 ${l.id} ${l.title} ${l.eventcontent} ${l.personnel} ${l.eventtype} ${l.evenlevel} ${l.eventtime} ${l.timeOfOccurrence}
$(".del").click(function(){var eventid = $(this).attr("eventid");window.location.href="deleteEven?eventid="+eventid+"&deleteevent=qwee&userid="+$("#userid").val();});$(".updateevent").click(function(){var eventid = $(this).attr("eventid"); window.location.href="updateEvent?eventid="+eventid;});$(".query").click(function(){window.location.href="deleteEven?title="+$(this).prev().val()+"&userid="+$("#userid").val();}); 点击查询事件页面的修改按钮打开修改事件页面（不足的地方：界面丑，添加事件字没改成修改事件，记录时间，发生时间未精确到时分秒，相关人员应用按钮实现，可以点击删除，也可以点击添加。重要级别与事件类型要用下拉框并且用户可以添加自定义）
updatee.jsp页面代码
添加事件 .search{}div{}添加事件
事件标题： 事件内容：事件类型：重要级别：相关人员：记录时间:发生时间: if($("#update").val()!=$("#update_a").val()){if($("#update").val()=="ok"){alert("修改成功!");}}$(".timeOfOccurrence").prev().val(timeConversion($(".timeOfOccurrence").val()));$(".eventtime").prev().val(timeConversion($(".eventtime").val()));function timeConversion(date){var d = new Date(date);var y = d.getFullYear(); var m = d.getMonth() + 1; m = m < 10 ? ('0' + m) : m; var d = d.getDate(); d = d < 10 ? ('0' + d) : d; return y + '-' + m + '-' + d;}接下来就是添加事件（不足的地方：与修改事件页面差不多）
AddEvent.jsp页面代码
添加事件 .search{}div{}添加事件
事件标题： 事件内容：事件类型： 选择事件类型 生活 工作 家庭 娱乐 其它重要级别： 选择重要级别 1 2 3 4 5相关人员：记录时间:发生时间: if($("#insert").val()!=$("#insert_a").val()){if($("#insert").val()=="ok"){alert("新增成功!");}else{alert("新增失败！");}}以上就是前端所有代码了,还有js，css，img的包都打包如下
链接：百度网盘 请输入提取码 提取码：r4ze
接下来就是后端(不足的地方：代码太多重复严重影响性能)
jdbc(用来连接数据库)jar包如下
链接：百度网盘 请输入提取码 提取码：adf5
com.accp.pojo
Event.java
package com.accp.pojo;import java.util.Date;public class Event {private int id;private String title;private String eventcontent;private String personnel;private String eventtype;private String evenlevel;private Date eventtime;private Date timeOfOccurrence;private int userid;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getEventcontent() {return eventcontent;}public void setEventcontent(String eventcontent) {this.eventcontent = eventcontent;}public String getPersonnel() {return personnel;}public void setPersonnel(String personnel) {this.personnel = personnel;}public String getEventtype() {return eventtype;}public void setEventtype(String eventtype) {this.eventtype = eventtype;}public String getEvenlevel() {return evenlevel;}public void setEvenlevel(String evenlevel) {this.evenlevel = evenlevel;}public Date getEventtime() {return eventtime;}public void setEventtime(Date eventtime) {this.eventtime = eventtime;}public Date getTimeOfOccurrence() {return timeOfOccurrence;}public void setTimeOfOccurrence(Date timeOfOccurrence) {this.timeOfOccurrence = timeOfOccurrence;}public int getUserid() {return userid;}public void setUserid(int userid) {this.userid = userid;}}com.accp.test
CheckLogin.java
package com.accp.test;import javax.servlet.RequestDispatcher;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 javax.servlet.http.HttpSession;import java.io.IOException;import java.sql.*;@WebServlet("/user/userlogin")public class CheckLogin 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 { HttpSession session =req.getSession();; req.setCharacterEncoding("UTF-8"); String name = req.getParameter("username"); String password = req.getParameter("password"); RequestDispatcher dis =null; System.out.println(name+password); try { try { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo"; Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, String SQL = "SELECT * FROM [users] where(name='"+name+"' and password ='"+password+"');";//注意：表名一定要带[] //结果集 PreparedStatement pstmt = comm.prepareStatement(SQL); ResultSet rs = pstmt.executeQuery(); if(rs.next()){ System.out.println(rs.getInt("id")); session.setAttribute("userid", rs.getInt("id")); if(rs!=null){ rs.close(); } if(pstmt!=null){ pstmt.close(); } if(comm!=null){ comm.close(); }// dis = req.getRequestDispatcher("http://localhost:8080/javaWeb_war_exploded/hello.jsp");// dis.forward(req,resp); session.setAttribute("checklogin", "OK"); resp.sendRedirect("http://localhost:8080/Record/index"); System.out.println("hah"); }else{ if(rs!=null){ rs.close(); } if(pstmt!=null){ pstmt.close(); } if(comm!=null){ comm.close(); }// dis = req.getRequestDispatcher("http://localhost:8080/javaWeb_war_exploded/fruit.jsp");// dis.forward(req,resp); session.setAttribute("checklogin", "error"); resp.sendRedirect("http://localhost:8080/Record/login"); } } catch (ClassNotFoundException e) { e.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } }}DeleteEvent.Java
package com.accp.test;import java.io.IOException;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.List;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 javax.servlet.http.HttpSession;import com.accp.pojo.Event;@WebServlet("/deleteEven")public class DeleteEvent 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 { req.setCharacterEncoding("UTF-8"); String id = req.getParameter("eventid"); String userid = req.getParameter("userid"); System.out.println("eventid为"+id); String title = req.getParameter("title"); try { try { HttpSession session = req.getSession(); Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo"; Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, String SQL = "delete from event where id="+id;//注意：表名一定要带[] //结果集 PreparedStatement pstmt = comm.prepareStatement(SQL); int rs = pstmt.executeUpdate(); if(rs>0) { String SQLl = "select * from event where userid="+userid; PreparedStatement pstmtq = comm.prepareStatement(SQLl); ResultSet rss = pstmtq.executeQuery(); List list = new ArrayList(); SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); while(rss.next()) { Event e = new Event(); e.setId(Integer.parseInt(rss.getString("id"))); e.setTitle(rss.getString("title")); e.setEventcontent(rss.getString("eventcontent")); e.setPersonnel(rss.getString("personnel")); e.setEventtype(rss.getString("eventtype")); e.setEvenlevel(rss.getString("evenlevel")); e.setEventtime(formatter.parse(rss.getString("eventtime"))); e.setTimeOfOccurrence(formatter.parse(rss.getString("timeOfOccurrence"))); list.add(e); } session.setAttribute("list",list); }else { String SQLl = "select * from event where userid="+userid; if(title!=null&&id==null) { SQLl +=" and title like '%"+title+"%'"; } PreparedStatement pstmtt = comm.prepareStatement(SQLl); ResultSet rss = pstmtt.executeQuery(); List list = new ArrayList(); SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); while(rss.next()) { Event e = new Event(); e.setId(Integer.parseInt(rss.getString("id"))); e.setTitle(rss.getString("title")); e.setEventcontent(rss.getString("eventcontent")); e.setPersonnel(rss.getString("personnel")); e.setEventtype(rss.getString("eventtype")); e.setEvenlevel(rss.getString("evenlevel")); e.setEventtime(formatter.parse(rss.getString("eventtime"))); e.setTimeOfOccurrence(formatter.parse(rss.getString("timeOfOccurrence"))); list.add(e); } session.setAttribute("list",list); } req.getRequestDispatcher("/queryEvents").forward(req, resp); } catch (ClassNotFoundException e) { e.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } }}Insert.java
package com.accp.test;import java.io.IOException;import java.sql.Connection;import java.sql.Date;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.SQLException;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 javax.servlet.http.HttpSession;@WebServlet("/insert")public class Insert extends HttpServlet{@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// TODO Auto-generated method stubdoPost(req, resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// TODO Auto-generated method stubtry {req.setCharacterEncoding("UTF-8");String userid = req.getParameter("userid");System.out.println("userid为"+userid);String title =req.getParameter("title");String eventcontent =req.getParameter("eventcontent");String personnel =req.getParameter("personnel");String eventtype =req.getParameter("eventtype");String evenlevel =req.getParameter("evenlevel");String eventtime = req.getParameter("eventtime");String timeOfOccurrence = req.getParameter("timeOfOccurrence");Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo";Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, String SQL = "insert into event(title,eventcontent,personnel,eventtype,evenlevel,eventtime,timeOfOccurrence,userid) values('"+title+"','"+eventcontent+"','"+personnel+"','"+eventtype+"','"+evenlevel+"','"+eventtime+"','"+timeOfOccurrence+"','"+userid+"')"; //结果集 PreparedStatement pstmt = comm.prepareStatement(SQL); int rs = pstmt.executeUpdate(); if(rs>0) { req.setAttribute("insert","ok"); req.getRequestDispatcher("/addEvent").forward(req, resp); } if(pstmt!=null){ pstmt.close(); } if(comm!=null){ comm.close(); }} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}QueryEvent.java
package com.accp.test;import java.io.IOException;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.text.ParsePosition;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.List;import javax.servlet.RequestDispatcher;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import com.accp.pojo.Event;@WebServlet("/queryevent")public class QueryEvent 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 { HttpSession session =req.getSession(); req.setCharacterEncoding("UTF-8"); String id = req.getParameter("userid"); String deleteevent = req.getParameter("deleteevent"); System.out.println("userid为"+id); System.out.println("deleteevent为"+deleteevent); try { try { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo"; Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, PreparedStatement pstmt=null; String SQL = "select * from event where userid="+id;//注意：表名一定要带[] //结果集 pstmt = comm.prepareStatement(SQL); ResultSet rs = pstmt.executeQuery(); List list = new ArrayList(); SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); while(rs.next()) { Event e = new Event(); e.setId(Integer.parseInt(rs.getString("id"))); e.setTitle(rs.getString("title")); e.setEventcontent(rs.getString("eventcontent")); e.setPersonnel(rs.getString("personnel")); e.setEventtype(rs.getString("eventtype")); e.setEvenlevel(rs.getString("evenlevel")); e.setEventtime(formatter.parse(rs.getString("eventtime"))); e.setTimeOfOccurrence(formatter.parse(rs.getString("timeOfOccurrence"))); list.add(e); } req.setAttribute("list",list); if(deleteevent!=null) { if(deleteevent.equals("qwee")) { System.out.println("删除"); }String eventid = req.getParameter("eventid"); System.out.println("eventid为"+eventid); String delete = "delete from event where id="+eventid;//注意：表名一定要带[] //结果集 pstmt = comm.prepareStatement(delete); int rss = pstmt.executeUpdate(); if(rss>0) { //结果集 req.setAttribute("deleteevent",null); } } if(pstmt!=null){ pstmt.close(); } if(comm!=null){ comm.close(); } if(rs!=null) { rs.close(); } req.getRequestDispatcher("/queryEvents").forward(req, resp); } catch (ClassNotFoundException e) { e.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } }}QueryUser.java
package com.accp.test;import java.io.IOException;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import javax.servlet.RequestDispatcher;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;@WebServlet("/user/query")public class QueryUser 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 { HttpSession session =req.getSession(); req.setCharacterEncoding("UTF-8"); String id = req.getParameter("userid"); String updates = req.getParameter("updates"); try { try { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo"; Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, PreparedStatement pstmt=null; String SQL = "select * from users where id="+id;//注意：表名一定要带[] //结果集 pstmt = comm.prepareStatement(SQL); ResultSet rs = pstmt.executeQuery(); if(rs.next()) { session.setAttribute("username", rs.getString("name")); session.setAttribute("password", rs.getString("password")); session.setAttribute("secretguard", rs.getString("secretguard")); } System.out.println(req.getParameter("update")); if(updates!=null) { if(updates.equals("updateuser")) { String name = req.getParameter("name"); String password = req.getParameter("password"); String secretguard = req.getParameter("secretguard"); String SQLU = "update users set name='"+name+"',password='"+password+"',secretguard='"+secretguard+"' where id="+id;//注意：表名一定要带[] //结果集 pstmt = comm.prepareStatement(SQLU); int rss = pstmt.executeUpdate(); if(rss>0) { session.setAttribute("username", name); session.setAttribute("password", password); session.setAttribute("secretguard", secretguard); req.setAttribute("update","ok"); } }else { req.setAttribute("update","no"); } } if(pstmt!=null){ pstmt.close(); }if(comm!=null){ comm.close(); } if(rs!=null) { rs.close(); } req.getRequestDispatcher("/UserInformation").forward(req, resp); } catch (ClassNotFoundException e) { e.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } }}Register.java
package com.accp.test;import java.io.IOException;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import javax.servlet.RequestDispatcher;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 javax.servlet.http.HttpSession;@WebServlet("/user/register")public class Register 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 { HttpSession session =req.getSession();; req.setCharacterEncoding("UTF-8"); String name = req.getParameter("username"); String password = req.getParameter("password"); System.out.println(name+password); try { try { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo"; Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, String SQL = "insert into users(name,password) values('"+name+"','"+password+"')";//注意：表名一定要带[] //结果集 PreparedStatement pstmt = comm.prepareStatement(SQL); int rs = pstmt.executeUpdate(); if(rs>0){ if(pstmt!=null){ pstmt.close(); } if(comm!=null){ comm.close(); }// dis = req.getRequestDispatcher("http://localhost:8080/javaWeb_war_exploded/hello.jsp");// dis.forward(req,resp); session.setAttribute("register", "OK"); resp.sendRedirect("http://localhost:8080/Record/register"); }else{ if(pstmt!=null){ pstmt.close(); } if(comm!=null){ comm.close(); }// dis = req.getRequestDispatcher("http://localhost:8080/javaWeb_war_exploded/fruit.jsp");// dis.forward(req,resp); session.setAttribute("register", "error"); resp.sendRedirect("http://localhost:8080/Record/register"); } } catch (ClassNotFoundException e) { e.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } }}UpdateEvent.java
package com.accp.test;import java.io.IOException;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.List;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 javax.servlet.http.HttpSession;import com.accp.pojo.Event;@WebServlet("/updateEvent")public class UpdateEvent 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 { req.setCharacterEncoding("UTF-8"); String eventid = req.getParameter("eventid"); System.out.println("eventid为"+eventid); String title = req.getParameter("title"); String eventcontent = req.getParameter("eventcontent"); String personnel = req.getParameter("personnel"); String eventtype = req.getParameter("eventtype"); String evenlevel = req.getParameter("evenlevel"); String eventtime = req.getParameter("eventtime"); String timeOfOccurrence = req.getParameter("timeOfOccurrence"); String first = req.getParameter("first"); System.out.println("修改"+first); if(first==null) { first="no"; } try { try { HttpSession session = req.getSession(); Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo"; Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, if(first.equals("ok")) { String SQL = "update event set title='"+title+"',eventcontent='"+eventcontent+"',personnel='"+personnel+"',eventtype='"+eventtype+"',evenlevel='"+evenlevel+"',eventtime='"+eventtime+"',timeOfOccurrence='"+timeOfOccurrence+"' where id="+eventid;//注意：表名一定要带[] //结果集 PreparedStatement pstmt = comm.prepareStatement(SQL); int rs = pstmt.executeUpdate(); if(rs>0) { String SQLl = "select * from event where id="+eventid; PreparedStatement pstmtq = comm.prepareStatement(SQLl); ResultSet rss = pstmtq.executeQuery(); List list = new ArrayList(); SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); while(rss.next()) { Event e = new Event(); e.setId(Integer.parseInt(rss.getString("id"))); e.setTitle(rss.getString("title")); e.setEventcontent(rss.getString("eventcontent")); e.setPersonnel(rss.getString("personnel")); e.setEventtype(rss.getString("eventtype")); e.setEvenlevel(rss.getString("evenlevel")); e.setEventtime(formatter.parse(rss.getString("eventtime"))); e.setTimeOfOccurrence(formatter.parse(rss.getString("timeOfOccurrence"))); list.add(e); } session.setAttribute("list",list); session.setAttribute("updatee", "ok"); }else { String SQLl = "select * from event where id="+eventid; PreparedStatement pstmtq = comm.prepareStatement(SQLl); ResultSet rss = pstmtq.executeQuery(); List list = new ArrayList(); SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); while(rss.next()) { Event e = new Event(); e.setId(Integer.parseInt(rss.getString("id"))); e.setTitle(rss.getString("title")); e.setEventcontent(rss.getString("eventcontent")); e.setPersonnel(rss.getString("personnel")); e.setEventtype(rss.getString("eventtype")); e.setEvenlevel(rss.getString("evenlevel")); e.setEventtime(formatter.parse(rss.getString("eventtime"))); e.setTimeOfOccurrence(formatter.parse(rss.getString("timeOfOccurrence"))); list.add(e); } session.setAttribute("updatee", "no"); session.setAttribute("list",list); } }else { String SQLl = "select * from event where id="+eventid; PreparedStatement pstmtq = comm.prepareStatement(SQLl); ResultSet rss = pstmtq.executeQuery(); List list = new ArrayList(); SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); while(rss.next()) { Event e = new Event(); e.setId(Integer.parseInt(rss.getString("id"))); e.setTitle(rss.getString("title")); e.setEventcontent(rss.getString("eventcontent")); e.setPersonnel(rss.getString("personnel")); e.setEventtype(rss.getString("eventtype")); e.setEvenlevel(rss.getString("evenlevel")); e.setEventtime(formatter.parse(rss.getString("eventtime"))); System.out.println(formatter.parse(rss.getString("eventtime"))); e.setTimeOfOccurrence(formatter.parse(rss.getString("timeOfOccurrence"))); System.out.println(formatter.parse(rss.getString("timeOfOccurrence"))); list.add(e); } session.setAttribute("updatee", "no"); session.setAttribute("list",list); } session.setAttribute("updatee", "no"); req.getRequestDispatcher("/updatee").forward(req, resp); } catch (ClassNotFoundException e) { e.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } }}UpdateUser.java
package com.accp.test;import java.io.IOException;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;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 javax.servlet.http.HttpSession;@WebServlet("/user/update")public class UpdateUser extends HttpServlet{@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// TODO Auto-generated method stubdoPost(req, resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// TODO Auto-generated method stubtry {HttpSession s = req.getSession();req.setCharacterEncoding("UTF-8");String id = req.getParameter("id");String name = req.getParameter("name");String password = req.getParameter("password");String secretguard = req.getParameter("secretguard");Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String URL = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;DatabaseName=Demo"; Connection comm = DriverManager.getConnection(URL, "sa", "123456");//userName是你数据库的用户名如sa, String SQL = "update users set name='"+name+"',password='"+password+"',secretguard='"+secretguard+"' where id="+id;//注意：表名一定要带[] //结果集 PreparedStatement pstmt = comm.prepareStatement(SQL); int rs = pstmt.executeUpdate(); if(rs>0) { req.setAttribute("update","ok"); } if(pstmt!=null){ pstmt.close(); } if(comm!=null){ comm.close(); }} catch (Exception e) {// TODO: handle exception}}}以上就是后端的所有代码啦
这是整个项目的压缩包
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