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Hzz / JavaEE+JDBC+Servlet的员工信息管理系统

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README
Apache-2.0

:heart: JavaEE+JDBC+Servlet+EL表达式的员工信息管理系统

介绍

简易的员工管理系统,包括信息的增删改查,新增员工图像

前端:HTMLCSSJavaScriptjQueryEL表达式,jsp
后端:JavaEEservlet(创建servlet,使用get和post请求处理数据;使用Request,Response,session存储数据),JDBC(德鲁伊数据库连接池,使用QueryRunner处理数据)

和上一次系统bootstrap+JavaEE+JDBC+JSP的信息管理系统相比

  1. 使用了servlet把业务处理代码放在后台处理,删除了不必要的jsp页面
  2. 使用El表达式展示数据,不用在前台获取一遍session数据

2021/9/27 更新

  1. 新增分页功能,包括所有用户和部门用户分页;使用PageUtils分页工具类

2021/10/8 更新

  1. dao层和service层部分采用单例模式(懒汉式-不支持多线程)
  2. service层部门采用工厂模式

源码

v1.0 - servlet-v1.0
v2.0 - servlet-v2.0
v3.0 - servlet-v3.0
v4.0 - servlet-v4.0

项目展示效果


主页

主页

注册

注册页面

员工列表

用户列表-第一次注册无须添加头像 用户列表-展示工资样式{大于8000:绿色;6000~8000之间:红色} 员工列表-筛选部门

修改

修改页面 修改一下工资 修改完成

删除

删除前 删除后


批量删除 批量删除完成

添加头像

双击头像添加头像 头像修改成功

分页

分页

数据库设计

MySQL数据库

员工表(员工编号,员工姓名,性别,部门编号,工资,地址,职位,头像文件名称)
部门表(部门编号,部门名称)
create table employee(
	eid int auto_increment primary key,
	ename varchar(20),
	sex varchar(3),
	pid int,
	salary double(12,2),
	dizhi varchar(100),
	job varchar(20)
)default charset=utf8;
insert into employee values(default,'涂鏊飞','男',802,8000,'武汉市','销售经理',null);
insert into employee values(default,'胡梓卓','男',701,10000,'天门市','项目经理',null);
insert into employee values(default,'李小龙','男',702,9000,'厦门市','开发人员',null);
insert into employee values(default,'董文武','男',702,8500,'黑龙江','开发人员',null);

create table department(
	pid int primary key,
	pname varchar(50)
)default charset=utf8;
insert into department values(701,'研发部');
insert into department values(702,'市场部');
insert into department values(802,'销售部');

alter table employee add constraint fk_pid foreign key(pid) references department(pid);
#on delete cascade on update cascade;

select * from employee;
select * from department;

项目结构

项目结构-后台部分 web前端部分

主要功能

  1. 员工注册
  2. 员工列表展示-可筛选部门
  3. 删除单个员工,批量删除员工
  4. 修改员工信息
  5. 双击头像,可提交员工头像

刷新用户列表无信息,可点击查询所有部门信息

db.properties

#通过反射获取获取包
#driverClassName=com.mysql.jc.jdbc.Driver #8.0
driverClassName=com.mysql.jdbc.Driver #5.0 数据库版本
# localhost 本地服务器
# 3306 端口
# demo 数据库名
url=jdbc:mysql://localhost:3306/demo?characterEncoding=utf8&useSSL=false&serverTimezone=UTC
# 用户名
username=root
# 密码
password=123456

utils工具类

package com.servlet.utils;

import com.alibaba.druid.pool.DruidDataSourceFactory;
import org.apache.commons.dbutils.QueryRunner;

import javax.sql.DataSource;
import java.sql.Connection;
import java.util.Properties;

/**
 * @author 涂鏊飞tu_aofei@163.com
 * @description: 数据库操作工具类 类描述
 * @create 2021-09-01 17:18
 */
public class JdbcUtils {
    private static DataSource ds;
    static {
        try {
            //1.加载配置文件
            Properties pro = new Properties();
            pro.load(JdbcUtils.class.getClassLoader().getResourceAsStream("db.properties"));
            //2.获取DataSource
            ds = DruidDataSourceFactory.createDataSource(pro);
        }
        catch (Exception e){
            ds = null;
        }
    }

    public static Connection getConnection(){
        Connection con;
        try {
            con = ds.getConnection();
        }
        catch (Exception ex){
            con = null;
        }
        return con;
    }
    /* 获取 QueryRunner */
    public static QueryRunner getQueryRunner(){
        QueryRunner runner = new QueryRunner(ds);
        return runner;
    }
}

pojo数据库映射类

员工头像是新增的功能,Employee类构造方法有两个重载,一个包含file【用来新增图片】,一个不包含【用来插入图片】
员工表:Employee.java
部门表:Department.java

dao数据访问层

Employee接口 public interface EmployeeDao
:one: public Integer addEmployee(Employee emp) throws SQLException; // 增加员工
:two: public List selectAllEmployee() throws SQLException;// 查询所有员工
:three: public Integer delEmployee(Integer eid) throws SQLException;// 根据eid删除员工
:four: public Integer conditiondelEmployee(Integer[] eid) throws SQLException;// 根据eid批量删除员工
:five: public List selectConditionEmployee(Integer pid) throws SQLException;// 根据pid查询指定的员工
:six: public Employee selectOneEmployee(Integer eid) throws SQLException;// 根据eid查询指定的员工
:seven: public Integer editOneEmployee(Integer eid,Employee employee) throws SQLException;// 根据eid修改员工信息
:eight: public Integer addUserImage(Integer eid,String file) throws SQLException;// 根据eid新增用户图片

Department接口 public interface DepartmentDao
:one: public List selectAllDepartment() throws SQLException;// 获取所有部门信息
:two: public Department selectOneDepartment(Integer pid) throws SQLException;// 根据pid获取对应的部门信息

service业务逻辑层

EmployeeService接口

public interface EmployeeService {
    // 增加员工
    public Integer addEmployee(Employee emp) throws SQLException;
    // 查询所有员工
    public List<Employee> selectAllEmployee() throws SQLException;
    // 根据eid删除员工
    public Integer delEmployee(Integer eid) throws SQLException;
    // 根据eid批量删除员工
    public Integer conditiondelEmployee(Integer[] eid) throws SQLException;
    // 根据pid查询指定的员工
    public List<Employee> selectConditionEmployee(Integer pid) throws SQLException;
    // 根据eid查询指定的员工
    public Employee selectOneEmployee(Integer eid) throws SQLException;
    // 根据eid修改员工信息
    public Integer editOneEmployee(Integer eid,Employee employee) throws SQLException;
    // 根据eid新增用户图片
    public Integer addUserImage(Integer eid,String file) throws SQLException;
}

DepartmentService接口

public interface DepartmentService {
    // 获取所有部门信息
    public List<Department> selectAllDepartment() throws SQLException;
    // 根据pid获取对应的部门信息
    public Department selectOneDepartment(Integer pid) throws SQLException;
}    

web servlet类,处理请求

:one: 增加员工 Employee_add_servlet.java
:two: 查询员工 employee_select.java
:three: 修改员工信息,不包含头像,提交到数据库 Employee_alter.java
:four: 批量删除员工 Employee_conditionDel.java
:five: 选择部门查询 Employee_conditionSelect.java
:six: 删除员工 employee_del.java
:seven: 获取修改后的员工信息 Employee_edit.java
:eight: 在增加员工之间处理 Employee_toadd_servlet.java
:nine: 获取要添加头像的员工id,设置session Employee_uploadfile.java
:keycap_ten: 处理图片名称,上传到服务器和数据库,删除原文件 FileServlet.java
11. 测试EL表达式 elSvl.java

web目录

输入图片说明

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简介

简易的员工管理系统,包括信息的增删改查,新增员工图像 展开 收起
Java
Apache-2.0
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