JavaWeb JavaBean JSP MVC MySQL Tomcat JavaScript Bootstrap.
基础JSP+Servlet或JSP+SSM(Spring、SpringMVC、MyBatis)框架或JSP+SSM+Maven(pom.xml)框架或SpringBoot…均可
开发工具:eclipse/idea/myeclipse/sts等均可配置运行
适用
课程设计,大作业,毕业设计,项目练习,学习演示等
//totalPage 总页数
if (totalRecord % pageSize == 0) {
//说明整除,正好每页显示pageSize条数据,没有多余一页要显示少于pageSize条数据的
this.totalPage = totalRecord / pageSize;
} else {
//不整除,就要在加一页,来显示多余的数据。
this.totalPage = totalRecord / pageSize + 1;
}
//开始索引
this.startIndex = (pageNum - 1) * pageSize;
//显示5页,这里自己可以设置,想显示几页就自己通过下面算法修改
this.start = 1;
this.end = 5;
//显示页数的算法
if (totalPage <= 5) {
//总页数都小于5,那么end就为总页数的值了。
this.end = this.totalPage;
} else {
//总页数大于5,那么就要根据当前是第几页,来判断start和end为多少了,
this.start = pageNum - 2;
this.end = pageNum + 2;
vo.setLeaveStart(rs.getString("leave_start"));
vo.setLeaveHour(rs.getString("leave_hour"));
}
c.close();
} catch (Exception e) {
e.printStackTrace();
}
return vo;
}
//@Override
public Map<String, Object> list(Map<String, Object> params) {
List<Leave> list = new ArrayList();
int totalCount = 0;
String condition = "";
import com.demo.util.Util;
import com.demo.vo.User;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
//@WebServlet("/AuthServlet")
public class AuthServlet extends HttpServlet {
this.redirectList(request, response);
} else if ("edit".equals(action)) {//修改
//取出页面传进来的各个数据,并设置到User对象的属性里
User vo = new User();
vo.setId(Long.valueOf(Util.decode(request, "id")));
vo.setUsername(Util.decode(request, "username"));
vo.setPassword(Util.decode(request, "password"));
vo.setRealName(Util.decode(request, "realName"));
vo.setUserSex(Util.decode(request, "userSex"));
vo.setUserPhone(Util.decode(request, "userPhone"));
vo.setUserText(Util.decode(request, "userText"));
vo.setUserType(Util.decode(request, "userType"));
package com.demo.servlet;
import com.demo.util.Util;
import com.demo.service.UserService;
import com.demo.service.impl.UserServiceImpl;
import com.demo.vo.User;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
<tr class="index-content-table-th">
<th>用户名</th>
<th>姓名</th>
<th>性别</th>
<th>手机</th>
<th>备注</th>
<th>类型</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach items="${list}" var="vo">
int totalCount = 0;
String condition = "";
String sqlList;
if (params.get("searchColumn") != null && !"".equals(params.get("searchColumn"))) {
condition += " and `" + params.get("searchColumn") + "` like '%" + params.get("keyword") + "%'";
}
try {
Connection c = Util.getConnection();
PreparedStatement ps;
ResultSet rs;
String limit = (params.get("startIndex") != null && params.get("pageSize") != null) ? " limit " + params.get("startIndex") + "," + params.get("pageSize") : "";
sqlList = "select * from `t_leave` where 1=1 " + condition + " order by id asc " + limit + ";";
ps = c.prepareStatement(sqlList);
rs = ps.executeQuery();
while (rs.next()) {
Leave vo = new Leave();
vo.setId(rs.getLong("id"));
vo.setLeaveName(rs.getString("leave_name"));
vo.setLeaveSex(rs.getString("leave_sex"));
vo.setLeavePhone(rs.getString("leave_phone"));
vo.setLeaveClass(rs.getString("leave_class"));
this.keyword = keyword;
}
}
package com.demo.util;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
for (User user : list) {
if (user.getUsername().equals(username) /*&& user.getPassword().equals(password)*/) {//说明该用户名已存在,必须换个用户名才能注册
request.getSession().setAttribute("alert_msg", "错误:用户名已存在!");
request.getRequestDispatcher("register.jsp").forward(request, response);
return;
}
}
User vo = new User();
vo.setUsername(username);
vo.setPassword(password);
//vo.setUserType("普通用户");//需要设置一个默认值
Serializable id = Util.decode(request, "id");//取出页面传入的主键,用于查询详情
UserService userService = new UserServiceImpl();
User vo = userService.get(id);
request.getSession().setAttribute("vo", vo);
String to = "get".equalsIgnoreCase(action) ? "info" : "edit";//判断是去详情显示页面还是编辑页面
response.sendRedirect("user_" + to + ".jsp");
} else {//默认去列表页面
this.redirectList(request, response);
}
}
/**
* 处理Get请求
*
* @param request
* @param response
* @throws ServletException
long id = Long.parseLong(Util.decode(request, "id"));
LeaveService leaveService = new LeaveServiceImpl();
//调用Service层删除方法(delete),将对应的记录删除
leaveService.delete(id);
this.redirectList(request, response);
} else if ("edit".equals(action)) {//修改
//取出页面传进来的各个数据,并设置到Leave对象的属性里
Leave vo = new Leave();
vo.setId(Long.valueOf(Util.decode(request, "id")));
vo.setLeaveName(Util.decode(request, "leaveName"));
vo.setLeaveSex(Util.decode(request, "leaveSex"));
vo.setLeavePhone(Util.decode(request, "leavePhone"));
vo.setLeaveClass(Util.decode(request, "leaveClass"));
vo.setLeaveReason(Util.decode(request, "leaveReason"));
vo.setLeaveStart(Util.decode(request, "leaveStart"));
vo.setLeaveHour(Util.decode(request, "leaveHour"));
LeaveService leaveService = new LeaveServiceImpl();
//调用Service层更新方法(update),更新记录
leaveService.update(vo);
this.redirectList(request, response);
} else if ("get".equalsIgnoreCase(action) || "editPre".equalsIgnoreCase(action)) {//根据主键ID,查询详情信息并跳转到详情页面或编辑页面
Serializable id = Util.decode(request, "id");//取出页面传入的主键,用于查询详情
LeaveService leaveService = new LeaveServiceImpl();
if (params.get("searchColumn") != null && !"".equals(params.get("searchColumn"))) {
condition += " and `" + params.get("searchColumn") + "` like '%" + params.get("keyword") + "%'";
}
try {
Connection c = Util.getConnection();
PreparedStatement ps;
ResultSet rs;
String limit = (params.get("startIndex") != null && params.get("pageSize") != null) ? " limit " + params.get("startIndex") + "," + params.get("pageSize") : "";
sqlList = "select * from `t_leave` where 1=1 " + condition + " order by id asc " + limit + ";";
ps = c.prepareStatement(sqlList);
rs = ps.executeQuery();
while (rs.next()) {
Leave vo = new Leave();
vo.setId(rs.getLong("id"));
vo.setLeaveName(rs.getString("leave_name"));
vo.setLeaveSex(rs.getString("leave_sex"));
vo.setLeavePhone(rs.getString("leave_phone"));
vo.setLeaveClass(rs.getString("leave_class"));
vo.setLeaveReason(rs.getString("leave_reason"));
Leave vo = new Leave();
//取出页面传进来的各个数据,并设置到Leave对象的属性里
vo.setLeaveName(Util.decode(request, "leaveName"));
vo.setLeaveSex(Util.decode(request, "leaveSex"));
vo.setLeavePhone(Util.decode(request, "leavePhone"));
vo.setLeaveClass(Util.decode(request, "leaveClass"));
vo.setLeaveReason(Util.decode(request, "leaveReason"));
vo.setLeaveStart(Util.decode(request, "leaveStart"));
vo.setLeaveHour(Util.decode(request, "leaveHour"));
LeaveService leaveService = new LeaveServiceImpl();
//调用Service层增加方法(add),增加记录
leaveService.add(vo);
this.redirectList(request, response);
} else if ("delete".equals(action)) {//删除
//取出表要删除的请假记录的主键
long id = Long.parseLong(Util.decode(request, "id"));
LeaveService leaveService = new LeaveServiceImpl();
//调用Service层删除方法(delete),将对应的记录删除
leaveService.delete(id);
this.redirectList(request, response);
} else if ("edit".equals(action)) {//修改
String codeChars = "0123456789";// 图形验证码的字符集合,系统将随机从这个字符串中选择一些字符作为验证码
// 获得验证码集合的长度
int charsLength = codeChars.length();
// 下面三条记录是关闭客户端浏览器的缓冲区
// 这三条语句都可以关闭浏览器的缓冲区,但是由于浏览器的版本不同,对这三条语句的支持也不同
// 因此,为了保险起见,建议同时使用这三条语句来关闭浏览器的缓冲区
response.setHeader("ragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
// 设置图形验证码的长和宽(图形的大小)
int width = 90, height = 20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();// 获得用于输出文字的Graphics对象
Random random = new Random();
g.setColor(getRandomColor(180, 250));// 随机设置要填充的颜色
g.fillRect(0, 0, width, height);// 填充图形背景
// 设置初始字体
return false;
}
if (document.getElementById("password").value.trim().length == 0) {
alert("密码不能为空!");
return false;
}
if (document.getElementById("realName").value.trim().length == 0) {
alert("姓名不能为空!");
return false;
}
String newPassword = Util.decode(request, "newPassword");
loginUser.setPassword(newPassword);
UserService userService = new UserServiceImpl();
userService.update(loginUser);
msg = "修改成功!";
}
request.getSession().setAttribute("alert_msg", msg);
request.getRequestDispatcher("reset_password.jsp").forward(request, response);
} else {
response.sendRedirect("login.jsp");
}
}
/**
PreparedStatement ps = c.prepareStatement(sql);
ps.setString(1, vo.getLeaveName());
ps.setString(2, vo.getLeaveSex());
ps.setString(3, vo.getLeavePhone());
ps.setString(4, vo.getLeaveClass());
ps.setString(5, vo.getLeaveReason());
ps.setString(6, vo.getLeaveStart());
ps.setString(7, vo.getLeaveHour());
ps.execute();
ps.close();
c.close();
} catch (Exception e) {
e.printStackTrace();
}
}
//@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);//Get请求和Post请求的处理是一样的,所以把request、response转交给Post方法就好
}
/**
* 根据参数,查询出条例条件的记录集合,最后将数据返回给调用处或者将数据集合设置到session域里,再跳转到对应的列表页面
*
* @param request
* @param response
*/
private void redirectList(HttpServletRequest request, HttpServletResponse response) throws IOException {
//查询列和关键字
String searchColumn = Util.decode(request, "searchColumn");
String keyword = Util.decode(request, "keyword");
Map<String, Object> params = new HashMap();//用来保存控制层传进来的参数(查询条件)
params.put("searchColumn", searchColumn);//要查询的列
params.put("keyword", keyword);//查询的关键字
LeaveService leaveService = new LeaveServiceImpl();
Map<String, Object> map = leaveService.list(params);
request.getSession().setAttribute("list", map.get("list"));
Integer totalRecord = (Integer) map.get("totalCount");//根据查询条件取出对应的总记录数,用于分页
return false;
}
if (document.getElementById("leaveReason").value.trim().length == 0) {
alert("请假原因不能为空!");
return false;
}
if (document.getElementById("leaveStart").value.trim().length == 0) {
alert("开始时间不能为空!");
return false;
}
if (document.getElementById("leaveHour").value.trim().length == 0) {
alert("请假时长(h)不能为空!");
return false;
}
return true;
char c = ch[i];
if (!Character.isLetterOrDigit(c)) {
if (!isChinese(c)) {
count = count + 1;
}
chLength++;
}
}
return count / chLength > 0.4;
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
//@Override
public Leave get(Serializable id) {
Leave vo = null;
try {
Connection c = Util.getConnection();
Statement s = c.createStatement();
String sql = "select * from `t_leave` where id = " + id;
ResultSet rs = s.executeQuery(sql);
if (rs.next()) {
vo = new Leave();
vo.setId(rs.getLong("id"));
vo.setLeaveName(rs.getString("leave_name"));
vo.setLeaveSex(rs.getString("leave_sex"));
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String action = Util.decode(request, "action");
if ("add".equals(action)) {//增加
Notice vo = new Notice();
//取出页面传进来的各个数据,并设置到Notice对象的属性里
vo.setNoticeName(Util.decode(request, "noticeName"));
vo.setNoticeText(Util.decode(request, "noticeText"));
vo.setNoticeType(Util.decode(request, "noticeType"));
vo.setCreateDate(Util.decode(request, "createDate"));
NoticeService noticeService = new NoticeServiceImpl();
//调用Service层增加方法(add),增加记录
noticeService.add(vo);
this.redirectList(request, response);
} else if ("delete".equals(action)) {//删除
//取出表要删除的公告记录的主键
long id = Long.parseLong(Util.decode(request, "id"));
<c:when test="${fn:length(vo.userText) > 19}">
<c:out value="${fn:substring(vo.userText, 0, 19)}..."/>
</c:when>
<c:otherwise>
<c:out value="${vo.userText}"/>
</c:otherwise>
</c:choose>
</td>
<td>${vo.userType}</td>
<td>
<button class="btn btn-pill btn-info btn-sm" style="padding: 0px 1px;" onclick="window.location.href='UserServlet?action=get&id=${vo.id}'">详情</button>
<button class="btn btn-pill btn-warning btn-sm" style="padding: 0px 1px;"
<c:if test="${loginUser.userType != '管理员' && vo.id != loginUser.id}">disabled="disabled" title="没有权限!!!"</c:if>
οnclick="window.location.href='UserServlet?action=editPre&id=${vo.id}'">编辑</button>
<button class="btn btn-pill btn-warning btn-sm" style="padding: 0px 1px;" <c:if test="${loginUser.userType != '管理员'}">disabled="disabled" title="没有权限!!!"</c:if> οnclick="if(window.confirm('将要删除:${vo.realName}?'))window.location.href='UserServlet?action=delete&id=${vo.id}'">删除</button>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<div style="float: right;padding-right: 10px;color: #515151;"><jsp:include page="split.jsp"/></div>
</div>
}
if (document.getElementById("realName").value.trim().length == 0) {
alert("姓名不能为空!");
return false;
}
if (document.getElementById("userPhone").value.trim().length == 0) {
alert("手机不能为空!");
return false;
}
return true;
}
</script>
</html>
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html>
<html>
<head>
import java.io.OutputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
//@WebServlet("/AuthServlet")
public class AuthServlet extends HttpServlet {
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//过滤编码
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String action = Util.decode(request, "action");
if ("login".equalsIgnoreCase(action)) {//登录
String username = Util.decode(request, "username");
String password = Util.decode(request, "password");
String validationCode = Util.decode(request, "validationCode");
if (validationCode != null && !validationCode.equals(request.getSession().getAttribute("validationCode"))) {//验证码不通过
request.getSession().setAttribute("alert_msg", "错误:验证码不正确!");
request.getRequestDispatcher("login.jsp").forward(request, response);
ps.setString(7, vo.getLeaveHour());
ps.execute();
ps.close();
c.close();
} catch (Exception e) {
e.printStackTrace();
}
}
//@Override
public void update(Leave vo) {
String sql = "update `t_leave` set `leave_name` = ? ,`leave_sex` = ? ,`leave_phone` = ? ,`leave_class` = ? ,`leave_reason` = ? ,`leave_start` = ? ,`leave_hour` = ? where `id` = ?";
try {
Connection c = Util.getConnection();
PreparedStatement ps = c.prepareStatement(sql);
ps.setString(1, vo.getLeaveName());
ps.setString(2, vo.getLeaveSex());
ps.setString(3, vo.getLeavePhone());
ps.setString(4, vo.getLeaveClass());
ps.setString(5, vo.getLeaveReason());
ps.setString(6, vo.getLeaveStart());
ps.setString(7, vo.getLeaveHour());
ps.setLong(8, vo.getId());
private String keyword;//待模糊查询的关键字
//通过pageNum,pageSize,totalRecord计算得来tatalPage和startIndex,构造方法中将pageNum,pageSize,totalRecord获得
public PageBean(int pageNum, int totalRecord) {
this.pageNum = (pageNum = Math.max(pageNum, 1));
this.pageSize = 10;//默认为10
this.totalRecord = totalRecord;
//totalPage 总页数
if (totalRecord % pageSize == 0) {
//说明整除,正好每页显示pageSize条数据,没有多余一页要显示少于pageSize条数据的
this.totalPage = totalRecord / pageSize;
} else {
//不整除,就要在加一页,来显示多余的数据。
this.totalPage = totalRecord / pageSize + 1;
}
//开始索引
this.startIndex = (pageNum - 1) * pageSize;
运行环境
Java≥6、Tomcat≥7.0、MySQL≥5.5
开发工具
eclipse/idea/myeclipse/sts等均可配置运行
技术框架
JavaWeb JavaBean JSP MVC MySQL Tomcat JavaScript Bootstrap.
基础JSP+Servlet或JSP+SSM(Spring、SpringMVC、MyBatis)框架或JSP+SSM+Maven(pom.xml)框架或SpringBoot…均可
适用
课程设计,大作业,毕业设计,项目练习,学习演示等
功能说明
登录、注册、退出、用户模块、公告模块、请假模块的增删改查管理
↖[获取源码方式]见左侧