该系统是一个简单的青年服务管理系统，主要包括了较完整的常用的增删改查以及多条件查询功能，对于初学者有很大帮助。
下面是相关的Java代码、jsp页面、以及数据库的创建和相关表的设计
java代码
首先是相关包的创建，如截图所示（使用的是eclipse软件）
package com.user;
public class User {
private int id;
private String name;
private String sex;
private String mianzu;
private String time;
private String age;
private String mianmao;
private String leibie;
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 getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getMianzu() {
return mianzu;
}
public void setMianzu(String mianzu) {
this.mianzu = mianzu;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getMianmao() {
return mianmao;
}
public void setMianmao(String mianmao) {
this.mianmao = mianmao;
}
public String getLeibie() {
return leibie;
}
public void setLeibie(String leibie) {
this.leibie = leibie;
}
public User() {
super();
// TODO 自动生成的构造函数存根
}
public User(int id, String name, String sex, String mianzu, String time, String age, String mianmao, String leibie) {
super();
this.id = id;
this.name = name;
this.sex = sex;
this.mianzu = mianzu;
this.time = time;
this.age = age;
this.mianmao = mianmao;
this.leibie = leibie;
}
public User(String name, String sex, String mianzu, String time, String age, String mianmao, String leibie) {
super();
this.name = name;
this.sex = sex;
this.mianzu = mianzu;
this.time = time;
this.age = age;
this.mianmao = mianmao;
this.leibie = leibie;
}
}
package com.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.user.User;
import com.util.DBUtil;
public class UserDao {
//添加
public boolean add(User message) {
String sql = "insert into m3(name,sex,mianzu,time,age,mianmao,leibie)"+"values(‘" + message.getName() + "‘,‘"
+ message.getSex() + "‘,‘" + message.getMianzu() + "‘,‘" + message.getTime() + "‘,‘"
+ message.getAge() + "‘,‘"+ message.getMianmao()+"‘,‘"+ message.getLeibie()+"‘)";
// 创建数据库链接
Connection conn = DBUtil.getConn();
Statement state = null;
boolean f = false;
int a = 0;
try {
state = conn.createStatement();
state.executeUpdate(sql);
} catch (Exception e) {
e.printStackTrace();
} finally {
// 关闭连接
DBUtil.close(state, conn);
}
if (a > 0) {
f = true;
}
return f;
}
public static boolean name(String name) {
boolean flag = false;
String sql = "select * from m3 where name = ‘" + name + "‘";
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
while (rs.next()) {
flag = true;
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return flag;
}
//查询
public User search(String name) {
String sql = "select * from m3 where name = ‘" + name + "‘";
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
User bean=null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
while (rs.next()) {
String name2 = rs.getString("name");
String sex2 = rs.getString("sex");
String mianzu2 = rs.getString("mianzu");
String time2 = rs.getString("time");
String age2 = rs.getString("age");
String mianmao2 = rs.getString("mianmao");
String leibie2 = rs.getString("leibie");
bean = new User(name2,sex2,mianzu2,time2,age2,mianmao2,leibie2);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return bean;
}
//删除
public boolean delete(String name){
String sql="delete from m3 where name=‘" + name + "‘";
Connection conn = DBUtil.getConn();
Statement state = null;
int a = 0;
boolean f = false;
try {
state = conn.createStatement();
a = state.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(state, conn);
}
if (a > 0) {
f = true;
}
return f;
}
//通过姓名查找
public static User getUserByName(String name) {
String sql = "select * from m3 where name =‘" + name + "‘";
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
User message = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
while (rs.next()) {
String sex = rs.getString("sex");
String mianzu = rs.getString("mianzu");
String time = rs.getString("time");
String age = rs.getString("age");
String mianmao = rs.getString("mianmao");
String leibie = rs.getString("leibie");
message = new User(name,sex,mianzu,time,age,mianmao,leibie);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return message;
}
//修改
public static boolean update(User message,String m) {
String sql = "update m3 set name=‘" + message.getName() + "‘, sex=‘" + message.getSex() + "‘, mianzu=‘" + message.getMianzu()+"‘,time=‘"+message.getTime()+"‘,age=‘"+message.getAge()+"‘,mianmao=‘"+message.getMianmao()+"‘,leibie=‘" + message.getLeibie() + "‘where name =‘" + m+ "‘";
Connection conn = DBUtil.getConn();
Statement state = null;
boolean f = false;
int a = 0;
try {
state = conn.createStatement();
a = state.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(state, conn);
}
if (a > 0) {
f = true;
}
return f;
}
//显示全部
public List<User> list()
{
String sql = "select * from m3";
List<User> list = new ArrayList<>();
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
while (rs.next()) {
User bean = null;
String name = rs.getString("name");
String sex = rs.getString("sex");
String mianzu = rs.getString("mianzu");
String time = rs.getString("time");
String age = rs.getString("age");
String mianmao = rs.getString("mianmao");
String leibie = rs.getString("leibie");
bean = new User(name,sex,mianzu,time,age,mianmao,leibie);
list.add(bean);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return list;
}
// 综合查询
public List<User> loadview(String sql) {
// TODO Auto-generated method stub
String sql1="select * from m3 "+ sql;
List<User> list =new ArrayList<User>();
Connection con=null;
PreparedStatement psts=null;
ResultSet rs=null;
try
{
con=DBUtil.getConn();
//String sql="select * from course";
psts=con.prepareStatement(sql1);
rs=psts.executeQuery();//记录返回的结果
while(rs.next())
{
String name=rs.getString("name");
String sex=rs.getString("sex");
String mianzu=rs.getString("mianzu");
String time=rs.getString("time");
String age=rs.getString("age");
String mianmao=rs.getString("mianmao");
String leibie=rs.getString("leibie");
User yi=new User(name,sex,mianzu,time,age,mianmao,leibie);
list.add(yi);
}
DBUtil.close(rs, psts, con);
} catch (SQLException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
return list;
}
}
package com.service;
import java.util.List;
import com.dao.UserDao;
import com.user.User;
//服务层
public class UserService {
UserDao mDao = new UserDao();
//添加
public boolean add(User message) {
boolean f = false;
if(!mDao.name(message.getName())) {
mDao.add(message);
f = true;
}
return f;
}
//查找
public User search(String name) {
return mDao.search(name);
}
//删除
public boolean delete(String name) {
mDao.delete(name);
return true;
}
public User getUserByName(String name)
{
return mDao.getUserByName(name);
}
//修改
public void update(User message,String name) {
mDao.update(message,name);
}
public List<User> list()
{
return mDao.list();
}
}
package com.servlet;
import java.io.IOException;
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 com.user.User;
import com.dao.UserDao;
import com.service.UserService;
@WebServlet("/UserServlet")
public class UserServlet extends HttpServlet {
static String mo=null;
private static final long serialVersionUID = 1L;
UserService service = new UserService();
/**
* 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 ("search".equals(method)) {
search(req, resp);
}else if ("delete".equals(method)) {
delete(req, resp);
}else if ("getUserByName".equals(method)) {
getUserByName(req, resp);
}else if ("update".equals(method)) {
update(req, resp);
}else if ("update1".equals(method))
{
update1(req,resp);
}else if ("list".equals(method)) {
list(req, resp);
}
}
//增加
private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
req.setCharacterEncoding("utf-8");
//获取数据
String name = req.getParameter("name");
String sex = req.getParameter("sex");
String mianzu = req.getParameter("mianzu");
String age = req.getParameter("age");
String time = req.getParameter("time");
String mianmao = req.getParameter("mianmao");
String [] leibies = req.getParameterValues("leibie");
StringBuffer buf = new StringBuffer();
for(String leibie : leibies){
buf.append(leibie);
}
String leibie = buf.toString();
User message = new User(name,sex,mianzu,time,age,mianmao,leibie);
//添加后消息显示
if(service.add(message)) {
req.setAttribute("message", "添加成功");
req.getRequestDispatcher("zhuye.jsp").forward(req,resp);
} else {
req.setAttribute("message", "姓名重复，请重新录入");
req.getRequestDispatcher("add.jsp").forward(req,resp);
}
}
//查询
private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
String name = req.getParameter("name");
User message = service.search(name);
if(message == null) {
req.setAttribute("message", "查无此人！");
req.getRequestDispatcher("search.jsp").forward(req,resp);
} else {
req.setAttribute("message", message);
req.getRequestDispatcher("search1.jsp").forward(req,resp);
}
}
//删除
private void delete(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
//String name=req.getParameter("name");
//if(MessageDao.name(name))
service.delete(mo);
req.setAttribute("message", "删除成功！");
req.getRequestDispatcher("zhuye.jsp").forward(req,resp);
}
//通过姓名查找后删除
private void getUserByName(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
String name = req.getParameter("name");
User message = service.getUserByName(name);
mo=name;
if(message==null)
{
req.setAttribute("message", "查无此人");
req.getRequestDispatcher("delete.jsp").forward(req, resp);
}
else
{
req.setAttribute("message", message);
req.getRequestDispatcher("delete1.jsp").forward(req,resp);
}
}
//修改
private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
String name = req.getParameter("name");
User message = UserDao.getUserByName(name);
mo=name;
if(message==null)
{
req.setAttribute("message","查无此人");
req.getRequestDispatcher("update.jsp").forward(req, resp);
}
else
{
req.setAttribute("message",message);
req.getRequestDispatcher("update1.jsp").forward(req,resp);
}
}
//修改
private void update1(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
String name = req.getParameter("name");
String sex = req.getParameter("sex");
String mianzu = req.getParameter("mianzu");
String age = req.getParameter("age");
String time = req.getParameter("time");
String mianmao = req.getParameter("mianmao");
String [] leibies = req.getParameterValues("leibie");
StringBuffer buf = new StringBuffer();
for(String leibie : leibies){
buf.append(leibie);
}
String leibie = buf.toString();
User message = new User(name,sex,mianzu,time,age,mianmao,leibie);
if(UserDao.update(message,mo))
{
req.setAttribute("message","修改成功");
req.getRequestDispatcher("zhuye.jsp").forward(req,resp);
}
}
//显示全部
private void list(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
List<User> messages = service.list();
req.setAttribute("messages", messages);
req.getRequestDispatcher("allmessage.jsp").forward(req,resp);
}
}
这个用来实现多条件查询、再今后的学习中，为了方便，我们可以将实现各种方法的servlet都单独写出来。package com.servlet;
import java.io.IOException;
import java.util.ArrayList;
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 com.dao.UserDao;
import com.user.User;
/**
* Servlet implementation class Servlet
*/
@WebServlet("/Servlet")
public class Servlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Servlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
request.setCharacterEncoding("utf-8");
response.setContentType("textml;charset=utf-8");
UserDao dao=new UserDao();
java.util.List<User> list= new ArrayList<User>();
String p[] = new String[5];//获得条件
String s[] = new String[5];//获得内容
String g[] = new String[5];//获得关系
String f[] = new String[5];//获得精确或者模糊
String number = null;
//String number1 = null;
number=request.getParameter("number1");
//number1=request.getParameter("number2");
int n = Integer.parseInt(number);//接收条件的个数
//int n1 = Integer.parseInt(number1);// ?? ? ?
for(int i=1;i<=n;i++)
{
p[i]= (String) request.getParameter("s"+i);
s[i]=(String)request.getParameter("shuru"+i);
f[i]=(String)request.getParameter("c"+i);
System.out.println("精确还是模糊 "+f[i]);
System.out.println("条件 "+p[i]);
System.out.println("输入 "+s[i]);
if(p[i].equals("名字"))
{
p[i] = "name";
}
else if(p[i].equals("性别"))
{
p[i] = "sex";
}else if(p[i].equals("民族"))
{
p[i] = "minzu";
}else if(p[i].equals("注册日期"))
{
p[i] = "time";
}else if(p[i].equals("年龄"))
{
p[i] = "age";
}
}
for(int i=1;i<n;i++)
{
g[i]=(String) request.getParameter("g"+i);
if(g[i].equals("且")) {
g[i]="and";
}else if(g[i].equals("或")) {
g[i]="or";
}
System.out.println("且或"+g[i]);
}
String sql="where ";
for(int i=1;i<n;i++)
{
if(s[i].equals(""))
{
continue;
}
if(f[i].equals("精确"))
{
sql=sql+p[i]+"=‘"+s[i]+"‘"+" "+g[i]+" ";
}else if(f[i].equals("模糊"))
{
sql=sql+p[i]+" "+"LIKE"+" "+"‘%"+s[i]+"%‘"+" "+g[i]+" ";
}
}
if(f[n].equals("精确"))
{
sql = sql + p[n]+"="+"‘"+s[n]+"‘";
}
else {
sql = sql + p[n]+" "+"LIKE"+" "+"‘%"+s[n]+"%‘";
}
// }
if(n==1&&s[1].equals(""))
{
System.out.println("什么也没传！");
sql="";
}
list = dao.loadview(sql);
if(list.size()==0){
request.setAttribute("message", "查询失败");
request.getRequestDispatcher("search2.jsp").forward(request,response);
}
else {
request.setAttribute("course11",list);
//request.setAttribute("message", "查询成功");
request.getRequestDispatcher("search3.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);
}
}
package com.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
//数据库连接工具
public class DBUtil {
public static String db_url = "jdbc:mysql://localhost:3306/choseuser?useSSL=false&serverTimezone=GMT";
public static String db_user = "root";
public static String db_pass = "";//数据库密码
public static Connection getConn () {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");//加载驱动
conn = DriverManager.getConnection(db_url, db_user, db_pass);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
/**
* 关闭连接
* @param state
* @param conn
*/
public static void close (Statement state, Connection conn) {
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close (ResultSet rs, Statement state, Connection conn) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
jsp
//zhuye.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>主界面</title>
</head>
<style>
a:link {color:blue;}
a:visited {color:blue;}/*选择未访问、已访问、悬浮和活动链接，并设置它们的样式：*/
a:hover {color:red;}
a{
font-size:22px;
font-family:"楷体";/*设置字体*/
font-weight:2px;
}
h1
{
color:red;
font-size:44px;}
</style>
<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: black;">青年志愿者服务网</h1>
</div>
<div align="center">
<div class="a">
<a href="add.jsp">信息登记</a>
</div>
<div class="a">
<a href="search.jsp">查询信息</a>
</div>
<div class="a">
<a href="delete.jsp">信息删除</a>
</div>
<div class="a">
<a href="update.jsp">信息修改</a>
</div>
<div class="a">
<a href="UserServlet?method=list">基本信息</a>
</div>
<div class="a">
<a href="search2.jsp">综合查询</a>
</div>
</div>
</body>
</html>
//add.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>信息登记</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: black;">信息登记</h1>
<a href="zhuye.jsp">返回主页</a>
<form action="UserServlet?method=add" method="post" onsubmit="return check()">
<div class="a">
姓名：<input type="text" id="name" name="name" />
</div>
<div class="a">
性别： <input type="radio" id="sex" name="sex" value="男">男
<input type="radio" id="sex"name="sex" value="女">女
</div>
<div class="a">
民族：<input type="text" id="mianzu" name="mianzu" style=" border-color:Lime;border-radius:6px;" required="required" />
</div>
<div class="a">
注册时间：<input type="date" id="time" name="time" />
</div>
<div class="a">
年龄：<input type="text" id="age" name="age" />
</div>
<div class="a">
政治面貌：<select name="mianmao" id="mianmao" >
<option value="群众" >群众</option>
<option value="共青团员" >共青团员</option>
<option value="中共党员">中共党员</option>
</select>
</div>
<div class="a" >
服务类别：
<div>
<input type="checkbox" name="leibie" id="leibie" value="扶危济困"/>扶危济困
<input type="checkbox" name="leibie" id="leibie" value="敬老助残"/>敬老助残
<input type="checkbox" name="leibie" id="leibie" value="社区服务"/>社区服务
<input type="checkbox" name="leibie" id="leibie" value="秩序维护"/>秩序维护
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="文体服务"/>文体服务
<input type="checkbox" name="leibie" id="leibie" value="环境保护"/>环境保护
<input type="checkbox" name="leibie" id="leibie" value="治安防范"/>治安防范
<input type="checkbox" name="leibie" id="leibie" value="医疗救治"/>医疗救治
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="法律援助"/>法律援助
<input type="checkbox" name="leibie" id="leibie" value="大型活动"/>大型活动
<input type="checkbox" name="leibie" id="leibie" value="心理疏导"/>心理疏导
<input type="checkbox" name="leibie" id="leibie" value="精神抚慰"/>精神抚慰
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="支教支医"/>支教支医
<input type="checkbox" name="leibie" id="leibie" value="科学普及"/>科学普及
<input type="checkbox" name="leibie" id="leibie" value="应急救援"/>应急救援
<input type="checkbox" name="leibie" id="leibie" value="便民服务"/>便民服务
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="民事调解"/>民事调解
<input type="checkbox" name="leibie" id="leibie" value="文明引导"/>文明引导
<input type="checkbox" name="leibie" id="leibie" value="安全生产"/>安全生产
<input type="checkbox" name="leibie" id="leibie" value="禁毒宣传"/>禁毒宣传
</div>
</div>
<div class="a">
<button type="submit" class="b">保存</button>
<input type="reset" value="重置" />
</div>
</form>
<script type="text/javascript">
function check() {
var name = document.getElementById("name");
var sex = document.getElementById("sex");
var mianzu = document.getElementById("mianzu");
var time= document.getElementById("time");
var age = document.getElementById("age");
var mianmao= document.getElementById("mianmao");
//非空
if(name.value == ‘‘) {
alert(‘性名不能为空‘);
name.focus();
return false;
}
if(sex.value == ‘‘) {
alert(‘性别不能为空‘);
sex.focus();
return false;
}
if(mianzu.value == ‘‘) {
alert(‘民族不能为空‘);
mianzu.focus();
return false;
}
if(time.value == ‘‘) {
alert(‘注册时间不能为空‘);
time.focus();
return false;
}
if(mianmao.value == ‘‘) {
alert(‘面貌不能为空‘);
mianmao.focus();
return false;
}
if(leibie.value == ‘‘) {
alert(‘类别不能为空‘);
leibie.focus();
return false;
}
var obj=document.getElementsByName("leibie");
var num=0;
for (var i=0;i<obj.length ;i++ )
if (obj[i].checked )
num+=1;
if (num>4)
{
alert("最多可以选择四个！");
return false;
}
}
</script>
</body>
</html>
delete.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>删除信息</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: black;">信息删除</h1>
<a href="zhuye.jsp">返回主页</a>
<form action="UserServlet?method=getUserByName" method="post" onsubmit="return check()">
<div class="a">
信息：<input type="text" id="name" name="name"/>
</div>
<div class="a">
<button type="submit" class="b">查找</button>
</div>
</form>
</div>
<script type="text/javascript">
function check() {
var name = document.getElementById("name");;
//非空
if(name.value == ‘‘) {
alert(‘姓名不能为空‘);
name.focus();
return false;
}
}
</script>
</body>
</html>
delete1.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>信息删除</title>
</head>
<body>
<div align="center">
<h1 style="color: black;">信息删除</h1>
<a href="zhuye.jsp">返回主页</a>
<table class="tb">
<tr>
<td>姓名：${message.name}</td>
</tr>
<tr>
<td>性别：${message.sex}</td>
</tr>
<tr>
<td>民族：${message.mianzu}</td>
</tr>
<tr>
<td>注册时间：${message.time}</td>
</tr>
<tr>
<td>年龄：${message.age}</td>
</tr>
<tr>
<td>政治面貌：${message.mianmao}</td>
</tr>
<tr>
<td >服务类别：${message.leibie}</td>
</tr>
</table>
<div class="a">
<a onclick="return check()" href="UserServlet?method=delete" method="post"">删除</a>
</div>
</div>
<script type="text/javascript">
function check() {
if (confirm("是否删除？")){
return true;
}else{
return false;
}
}
</script>
</body>
</html>
search.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>信息查询</title>
</head>
<body>
<%
Object message = request.getAttribute("message");
if(message!=null && !"".equals(message)){
%>
<script type="text/javascript">
alert("<%=request.getAttribute("message")%>");
</script>
<%} %>
<div align="center">
<h1 style="color: black;">信息查询</h1>
<a href="zhuye.jsp">返回主页</a>
<form action="UserServlet?method=search" method="post" onsubmit="return check()">
<div class="a">
姓名：<input type="text" id="name" name="name"/>
</div>
<div class="a">
<button type="submit" class="b">查询</button>
</div>
</form>
</div>
<script type="text/javascript">
function check() {
var name = document.getElementById("name");;
//非空
if(name.value == ‘‘) {
alert(‘请输入姓名‘);
return false;
}
}
</script>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>信息查询</title>
</head>
<body>
<div align="center">
<h1 style="color: black;">信息列表</h1>
<a href="zhuye.jsp">返回主页</a>
<table class="tb">
<tr>
<td>姓名：${message.name}</td>
</tr>
<tr>
<td>性别：${message.sex}</td>
</tr>
<tr>
<td>民族：${message.mianzu}</td>
</tr>
<tr>
<td>注册时间：${message.time}</td>
</tr>
<tr>
<td>年龄：${message.age}</td>
<tr>
<td>政治面貌：${message.mianmao}</td>
</tr>
<tr>
<td>服务类别:${message.leibie}</td>
</tr>
</table>
</div>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>查询页面</title>
<script>
var i=1;
var j=1;
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
function demoDisplay(){
if(document.getElementById("p2").style.display=="none"){
i++;
j++;
document.getElementById("p2").style.display="inline";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
// alert(i);
// alert(j);
return;
}else if(document.getElementById("p3").style.display=="none")
{
i++;
j++;
document.getElementById("p3").style.display="inline";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
// alert(i);
// alert(j);
return;
}else if(document.getElementById("p4").style.display=="none")
{
i++;
j++;
document.getElementById("p4").style.display="inline";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
// alert(i);
// alert(j);
return;
}else if(document.getElementById("p5").style.display=="none")
{
i++;
j++;
document.getElementById("p5").style.display="inline";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
// alert(i);
// alert(j);
return;
}
}
function demoVisibility(){
if(document.getElementById("p5").style.display=="inline")
{
i--;
j--;
document.getElementById("p5").style.display="none";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
//System.out.println("i:"+i+"j"+j);
return;
}else if(document.getElementById("p4").style.display=="inline")
{
i--;
j--;
document.getElementById("p4").style.display="none";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
//System.out.println("i:"+i+"j"+j);
return;
}else if(document.getElementById("p3").style.display=="inline")
{
i--;
j--;
document.getElementById("p3").style.display="none";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
//System.out.println("i:"+i+"j"+j);
return;
}else if(document.getElementById("p2").style.display=="inline")
{
i--;
j--;
document.getElementById("p2").style.display="none";
document.getElementById(‘number1‘).value=i;
document.getElementById(‘number2‘).value=j;
//System.out.println("i:"+i+"j"+j);
return;
}
}
</script>
</head>
<body>
<%
Object message=request.getAttribute("message");
if(message!=null&&!"".equals(message)){
%>
<script type="text/javascript">
alert("<%=request.getAttribute("message")%>");
</script>
<%}%>
<form action="Servlet" method="post">
<br>
<button type="button" onclick="demoDisplay()" class="layui-btn layui-btn-primary layui-btn-sm"><i class="layui-icon">+</i></button>
<button type="button" onclick="demoVisibility()" class="layui-btn layui-btn-primary layui-btn-sm"><i class="layui-icon">-</i></button><br>
<div id="p1">
<select name="g22" style="visibility:hidden">
<option value="且">且</option>
<option value="或">或</option>
</select>
<select name="s1" >
<option>名字</option>
<option>性别</option>
<option>民族</option>
<option>注册日期</option>
<option>年龄</option>
</select>
<input type="text" name="shuru1" value="" />
<select name="c1">
<option>精确</option>
<option>模糊</option>
</select>
<br>
</div>
<div id="p2" style="display:none">
<select name="g1" >
<option value="且">且</option>
<option value="或">或</option>
</select>
<select name="s2">
<option>名字</option>
<option>性别</option>
<option>民族</option>
<option>注册日期</option>
<option>年龄</option>
</select>
<input type="text" name="shuru2" value="" />
<select name="c2">
<option>精确</option>
<option>模糊</option>
</select>
<br>
</div>
<div id="p3" style="display:none">
<select name="g2">
<option value="且">且</option>
<option value="或">或</option>
</select>
<select name="s3">
<option>名字</option>
<option>性别</option>
<option>民族</option>
<option>注册日期</option>
<option>年龄</option>
</select>
<input type="text" name="shuru3" value="" />
<select name="c3">
<option>精确</option>
<option>模糊</option>
</select>
<br>
</div>
<div id="p4" style="display:none">
<select name="g3">
<option value="且">且</option>
<option value="或">或</option>
</select>
<select name="s4">
<option>名字</option>
<option>性别</option>
<option>民族</option>
<option>注册日期</option>
<option>年龄</option>
</select>
<input type="text" name="shuru4" value="" />
<select name="c4">
<option>精确</option>
<option>模糊</option>
</select>
<br>
</div>
<div id="p5" style="display:none">
<select name="g4">
<option value="且">且</option>
<option value="或">或</option>
</select>
<select name="s5">
<option>名字</option>
<option>性别</option>
<option>民族</option>
<option>注册日期</option>
<option>年龄</option>
</select>
<input type="text" name="shuru5" value="" />
<select name="c5">
<option>精确</option>
<option>模糊</option>
</select>
</div>
<p hidden>
<input type="text" value="1" id="number1" name="number1">
<input type="text" value="1" id="number2" name="number2">
</p>
<br>
<input type="submit" name="submit" value="查询" >
</form>
<br>
<h4 align="left">
<%-- 一共查询到了<span style="color:red"><%=list.size() %></span>条数据 --%>
</h4>
<table class="table table-striped">
</table>
</body>
</html>
<%@ page language="java" contentType="text/html; charse=tUTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>信息显示页面</title>
</head>
<body>
<a href="zhuye.jsp">返回主界面</a>
<%
Object message=request.getAttribute("message");
if(message!=null&&!"".equals(message)){
%>
<script type="text/javascript">
alert("<%=request.getAttribute("message")%>");
</script>
<%}%>
<table>
<tr>
<td>姓名</td>
<td>性别</td>
<td>民族</td>
<td>注册日期</td>
<td>年龄</td>
<td>政治面貌</td>
<td>服务类别</td>
</tr>
<c:forEach items="${course11}" var="course1">
<tr>
<td>${course1.name}</td>
<td>${course1.sex}</td>
<td>${course1.mianzu}</td>
<td>${course1.time}</td>
<td>${course1.age}</td>
<td>${course1.mianmao}</td>
<td>${course1.leibie}</td>
</tr>
</c:forEach>
</table>
</body>
</html>
update.jsp<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html><html><head><meta charset="UTF-8"><title>修改信息</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: black;">信息修改</h1> <a href="zhuye.jsp">返回主页</a> <form action="UserServlet?method=update" method="post" onsubmit="return check()"> <div class="a"> 姓名<input type="text" id="name" name="name"/> </div> <div class="a"> <button type="submit" class="b">查找</button> </div> </form> </div> <script type="text/javascript"> function check() { var name = document.getElementById("name");; //非空 if(name.value == ‘‘) { alert(‘姓名不能为空‘); name.focus(); return false; } } </script></body></html>
//update1.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>信息修改</title>
</head>
<body>
<div align="center">
<h1 style="color: black;">信息修改</h1>
<a href="zhuye.jsp">返回主页</a>
<form action="UserServlet?method=update1" method="post" onsubmit="return check()">
<div class="a">
姓名：<input type="text" id="name" name="name" value="${message.name}"/>
</div>
<div class="a">
性别：<input type="radio" id="sex" name="sex" value="男"
<c:if test="${message.sex==\"男\"}">checked</c:if>>男
<input type="radio" id="sex" name="sex" value="女"
<c:if test="${message.sex==\"女\"}">checked</c:if>>女
</div>
<div class="a">
民族：<input type="text" id="mianzu" name="mianzu" value="${message.mianzu}"/>
</div>
<div class="a">
注册时间：<input type="date" id="time" name="time" value="${message.time}"/>
</div>
<div class="a">
年龄：<input type="text" id="age" name="age" value="${message.age}"/>
</div>
<div class="a">
政治面貌： <select name="mianmao" id="mianmao" >
<option value="群众" <c:if test="${message.mianmao==\"群众\"}">selected</c:if>>群众</option>
<option value="共青团员" <c:if test="${message.mianmao==\"共青团员\"}">selected</c:if>>共青团员</option>
<option value="中共党员" <c:if test="${message.mianmao==\"中共党员\"}">selected</c:if>>中共党员</option>
</select>
</div>
<div class="a">
服务类别：
<div>
<input type="checkbox" name="leibie" id="leibie" value="扶危济困"/>扶危济困
<input type="checkbox" name="leibie" id="leibie" value="敬老助残"/>敬老助残
<input type="checkbox" name="leibie" id="leibie" value="社区服务"/>社区服务
<input type="checkbox" name="leibie" id="leibie" value="秩序维护"/>秩序维护
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="文体服务"/>文体服务
<input type="checkbox" name="leibie" id="leibie" value="环境保护"/>环境保护
<input type="checkbox" name="leibie" id="leibie" value="治安防范"/>治安防范
<input type="checkbox" name="leibie" id="leibie" value="医疗救治"/>医疗救治
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="法律援助"/>法律援助
<input type="checkbox" name="leibie" id="leibie" value="大型活动"/>大型活动
<input type="checkbox" name="leibie" id="leibie" value="心理疏导"/>心理疏导
<input type="checkbox" name="leibie" id="leibie" value="精神抚慰"/>精神抚慰
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="支教支医"/>支教支医
<input type="checkbox" name="leibie" id="leibie" value="科学普及"/>科学普及
<input type="checkbox" name="leibie" id="leibie" value="应急救援"/>应急救援
<input type="checkbox" name="leibie" id="leibie" value="便民服务"/>便民服务
</div>
<div>
<input type="checkbox" name="leibie" id="leibie" value="民事调解"/>民事调解
<input type="checkbox" name="leibie" id="leibie" value="文明引导"/>文明引导
<input type="checkbox" name="leibie" id="leibie" value="安全生产"/>安全生产
<input type="checkbox" name="leibie" id="leibie" value="禁毒宣传"/>禁毒宣传
</div>
</div>
<div class="a">
<input type="submit" class="b" value="修改" />
<button type="button" onclick="location.href=‘zhuye.jsp‘" class="b">返回</button>
</div>
</div>
</form>
<script type="text/javascript">
function check() {
var name = document.getElementById("name");
var sex = document.getElementById("sex");
var mianzu = document.getElementById("mianzu");
var time= document.getElementById("time");
var age = document.getElementById("age");
var mianmao= document.getElementById("mianmao");
//非空
if(name.value == ‘‘) {
alert(‘性名不能为空‘);
name.focus();
return false;
}
if(sex.value == ‘‘) {
alert(‘性别不能为空‘);
sex.focus();
return false;
}
if(mianzu.value == ‘‘) {
alert(‘民族不能为空‘);
mianzu.focus();
return false;
}
if(time.value == ‘‘) {
alert(‘注册时间不能为空‘);
time.focus();
return false;
}
var obj=document.getElementsByName("leibie");
var num=0;
for (var i=0;i<obj.length ;i++ )
if (obj[i].checked )
num+=1;
if (num>4)
{
alert("服务类别最多可以选择四个！");
return false;
}
}
</script>
</body>
</html>
allmessage.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>所有信息</title>
<style>
.tb, td {
border: 1px solid black;
font-size: 22px;
}
</style>
</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: black;">基本信息列表</h1>
<a href="zhuye.jsp">返回主页</a>
<table class="tb">
<tr>
<td>姓名</td>
<td>性别</td>
<td>民族</td>
<td>政治面貌</td>
</tr>
<!-- forEach遍历出adminBeans -->
<c:forEach items="${messages}" var="item" >
<tr>
<td><a href="UserServlet?method=search&&name=${item.name}">${item.name}</a></td>
<td>${item.sex}</td>
<td>${item.mianzu}</td>
<td>${item.mianmao}</td>
<td><a href="UserServlet?method=update&&name=${item.name}">修改</a></td>
<td><a href="UserServlet?method=delete&&name=${item.name}">删除</a></td>
<td><a href="UserServlet?method=search&&name=${item.name}">详细信息</a></td>
</tr>
</c:forEach>
</table>
</div>
</body>
</html>
数据库、表的设计
以上就是整个系统的全部内容了，供参考。
原文地址：https://www.cnblogs.com/MoooJL/p/12151811.html
时间： 2024-10-21 19:35:37