JSP實(shí)現(xiàn)簡單人事管理系統(tǒng)

package org.wang.model;

public class Emp {
 private String account;
 private String name;
 private String password;
 private String email;

 public Emp(String account, String name, String password, String email) {
 this.account = account;
 this.name = name;
 this.password = password;
 this.email = email;
 }

 public String getAccount() {
 return account;
 }

 public void setAccount(String account) {
 this.account = account;
 }

 public String getName() {
 return name;
 }

 public void setName(String name) {
 this.name = name;
 }

 public String getPassword() {
 return password;
 }

 public void setPassword(String password) {
 this.password = password;
 }

 public String getEmail() {
 return email;
 }

 public void setEmail(String email) {
 this.email = email;
 }
}

package org.wang.db;

import org.wang.model.Emp;
import java.util.HashMap;
import java.util.Map;

//用集合模擬操縱數(shù)據(jù)庫
public class DBUtil{
 public static MapString, Emp> map = new HashMapString, Emp>();
 //用靜態(tài)代碼塊完成對map中的值的初始化操作
 static {
 map.put("001",new Emp("001","zhangsan","111111","111111@qq.com"));
 map.put("002",new Emp("002","lisi","121212","121212@qq.com"));
 map.put("003",new Emp("003","wangwu","131313","131313@qq.com"));
 map.put("004",new Emp("004","zhaoliu","141414","141414@qq.com"));
 }

 //判斷用戶名和密碼是否正確
 public static boolean selectEmpByAccountAndPassword(Emp emp){
 //用戶輸入的信息存入到emp對象中，判斷emp對象中的值是否和map中的值對應(yīng)
 boolean flag = false;
 //遍歷當(dāng)前map集合中的key
 for (String key : map.keySet()){
 Emp e = map.get(key);
 //判斷用戶傳入的值是否與map集合中的值相等
 if(emp.getAccount().equals(e.getAccount())  emp.getPassword().equals(e.getPassword())){
 flag = true;
 break;
 }
 }
 return flag;
 }
}

%--
 Created by IntelliJ IDEA.
 User: wangy
 Date: 2018/11/8
 Time: 8:19
 To change this template use File | Settings | File Templates.
--%>
%@ page contentType="text/html;charset=UTF-8" language="java" %>
html>
 head>
 title>人事管理系統(tǒng)登錄/title>
 /head>
 body>
 h3 align="center">人事管理系統(tǒng)登錄頁面/h3>
 hr>
 %--action代表了服務(wù)器端的處理程序--%>
 form action="index-control.jsp">
 table align="center">
 tr>
 td>
 賬號：
 /td>
 td>
 input type="text" name="account">
 /td>
 /tr>
 tr>
 td>
 密碼：
 /td>
 td>
 input type="password" name="password">
 /td>
 /tr>
 tr>
 td>
 input type="submit" value="登錄">
 /td>
 /tr>
 /table>
 /form>
 /body>
/html>

%--
 Created by IntelliJ IDEA.
 User: wangy
 Date: 2018/11/8
 Time: 9:09
 To change this template use File | Settings | File Templates.
--%>
%@ page contentType="text/html;charset=UTF-8" language="java" errorPage="error.jsp" %>
%@ page import="org.wang.db.*,org.wang.model.*" %>
%@ page import="java.util.Map" %>
html>
head>
 title>人事管理系統(tǒng)/title>
/head>
body>
 %--獲取用戶輸入的賬號及密碼，并調(diào)用DBUtil中的方法判斷信息是否存在
 request:獲取請求信息
 request.getParameter(String name)：可以通過一個(gè)控件的name屬性來獲取控件的值
 out.println(); 向頁面輸出信息
 --%>
 %
 // 獲取用戶輸入的賬號及密碼
 String account = request.getParameter("account");
 String password = request.getParameter("password");

 //將用戶輸入的賬號和密碼封裝到一個(gè)Emp對象中
 Emp emp = new Emp(account,null,password,null);
 boolean flag = DBUtil.selectEmpByAccountAndPassword(emp);

 //獲取map集合
 MapString,Emp> map = DBUtil.map;
 if(flag==true){
 //設(shè)置session
 session.setAttribute("account",account);
 //使用application來獲取系統(tǒng)訪問量
 Object o = application.getAttribute("count");
 //判斷如果當(dāng)前用戶為第一個(gè)登錄，則application中的值為空，此時(shí)將訪問量設(shè)置為1
 if(o == null){
 application.setAttribute("count",1);
 }else{
 //count原來為String，強(qiáng)轉(zhuǎn)為int型，并做+1操作
 int count = Integer.parseInt(o.toString());
 application.setAttribute("count",count+1);
 }
 %>
 %--獲取訪問量并顯示到頁面上--%>
 h3 align="right">當(dāng)前訪問量：%=application.getAttribute("count")%>/h3>
 %--獲取session中的值并顯示到頁面上--%>
 h3 align="center">歡迎來到人事管理系統(tǒng)/h3>
 h3 align="right">登錄賬戶：%=session.getAttribute("account")%>/h3>
 hr>
 table align="center" border="1" width="500px">
 tr>
 td>
 賬號
 /td>
 td>
 員工姓名
 /td>
 td>
 郵箱
 /td>
 td>
 修改
 /td>
 /tr>
 %--用for循環(huán)自動(dòng)根據(jù)模擬數(shù)據(jù)庫中的數(shù)據(jù)生成單元行，顯示出員工信息表--%>
 %
 for (String key : map.keySet()){
 Emp e = map.get(key);
 %>
 tr>
 td>
 %=e.getAccount()%>
 /td>
 td>
 %=e.getName()%>
 /td>
 td>
 %=e.getEmail()%>
 /td>
 td>
 %--點(diǎn)擊修改跳轉(zhuǎn)到update.jsp頁面，采用URL方式傳遞參數(shù),地址欄會(huì)顯示數(shù)據(jù)信息--%>
 %--相鄰兩個(gè)jsp頁面?zhèn)鬟f數(shù)據(jù)時(shí)，可通過URL參數(shù)的方式傳遞--%>
  %--語法規(guī)則：頁面？key1=value1  key2=value2--%>
 a href="update.jsp?account=%=e.getAccount()%>name=%=e.getName()%>email=%=e.getEmail()%>" rel="external nofollow" >修改/a>
 /td>
 /tr>
 %
 }
 %>
 /table>
 %
 }else{
 throw new Exception("登錄失敗");
 }
 %>

/body>
/html>

%--
 Created by IntelliJ IDEA.
 User: wangy
 Date: 2018/11/8
 Time: 16:01
 To change this template use File | Settings | File Templates.
--%>
%@ page contentType="text/html;charset=UTF-8" language="java" isErrorPage="true" %>
html>
head>
 title>Title/title>
/head>
body>
 %=exception.getMessage()%>
/body>
/html>

%--
 Created by IntelliJ IDEA.
 User: wangy
 Date: 2018/11/8
 Time: 15:27
 To change this template use File | Settings | File Templates.
--%>
%@ page contentType="text/html;charset=UTF-8" language="java" %>
html>
head>
 title>員工更新頁面/title>
/head>
body>
 h3 align="right">當(dāng)前訪問量：%=application.getAttribute("count")%>/h3>
 h3 align="center">員工更新頁面/h3>
 %--獲取session中的值并顯示到頁面上--%>
 h3 align="right">登錄賬戶：%=session.getAttribute("account")%>/h3>
 hr>
 form action="update-control.jsp">
 table align="center" border="1" width="500px">
 tr>
 %--value="%=request.getParameter("account")%>"可用于實(shí)現(xiàn)數(shù)據(jù)的回顯--%>
 td>賬號/td>
 td>input type="text" name="account" value="%=request.getParameter("account")%>">/td>
 /tr>
 tr>
 td>姓名/td>
 td>input type="text" name="name" value="%=request.getParameter("name")%>">/td>
 /tr>
 tr>
 td>郵箱/td>
 td>input type="text" name="email" value="%=request.getParameter("email")%>">/td>
 /tr>
 tr>
 td>
  input type="submit" value="修改">
 /td>
 /tr>
 /table>
 /form>
/body>
/html>

%--
 Created by IntelliJ IDEA.
 User: wangy
 Date: 2018/11/9
 Time: 9:46
 To change this template use File | Settings | File Templates.
--%>
%@ page contentType="text/html;charset=UTF-8" language="java" %>
%@page import="org.wang.db.*,org.wang.model.*" %>
%@ page import="java.util.Map" %>
html>
head>
 title>Title/title>
/head>
body>
 %
 //獲取map集合
 MapString,Emp> map = DBUtil.map;
 //修改信息
 //獲取當(dāng)前需要修改的員工的account
 Emp emp = map.get(request.getParameter("account"));
 //把獲取到的當(dāng)前員工的信息重新set
 emp.setName(request.getParameter("name"));
 emp.setEmail(request.getParameter("email"));
 %>
 h3 align="center">修改員工信息成功/h3>
/body>
/html>