smdms超市訂單管理系統之登入功能

一、超市訂單管理系統準備階段

• Supermarket order management system

1. 建立資料庫
   

2. 資料庫程式碼放置如下

點選檢視資料庫address程式碼

CREATE TABLE `smbms_address` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主鍵',
  `contact` varchar(15) DEFAULT NULL COMMENT '聯絡人姓名',
  `addressDesc` varchar(50) DEFAULT NULL COMMENT '收貨地址',
  `postCode` varchar(15) DEFAULT NULL COMMENT '郵編',
  `tel` int(20) DEFAULT NULL COMMENT '聯絡人電話',
  `createdBy` varchar(20) DEFAULT NULL COMMENT '建立者',
  `creationDate` datetime DEFAULT NULL COMMENT '建立時間',
  `modifyBy` bigint(20) DEFAULT NULL COMMENT '修改者',
  `modifyDate` datetime DEFAULT NULL COMMENT '修改時間',
  `userId` bigint(20) DEFAULT NULL COMMENT '使用者ID',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `smbms_address` VALUES (1, '王麗', '北京市東城區東交民巷44號', '100010', '13678789999', 1, '2016-04-13 00:00:00', NULL, NULL, 1);
INSERT INTO `smbms_address` VALUES (2, '張紅麗', '北京市海淀區丹稜街3號', '100000', '18567672312', 1, '2016-04-13 00:00:00', NULL, NULL, 1);
INSERT INTO `smbms_address` VALUES (3, '任志強', '北京市東城區美術館后街23號', '100021', '13387906742', 1, '2016-04-13 00:00:00', NULL, NULL, 1);
INSERT INTO `smbms_address` VALUES (4, '曹穎', '北京市朝陽區朝陽門南大街14號', '100053', '13568902323', 1, '2016-04-13 00:00:00', NULL, NULL, 2);
INSERT INTO `smbms_address` VALUES (5, '李慧', '北京市西城區三里河路南三巷3號', '100032', '18032356666', 1, '2016-04-13 00:00:00', NULL, NULL, 3);
INSERT INTO `smbms_address` VALUES (6, '王國強', '北京市順義區高麗營鎮金馬工業區18號', '100061', '13787882222', 1, '2016-04-13 00:00:00', NULL, NULL, 3);

點選檢視資料庫bill程式碼

CREATE TABLE `smbms_bill` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `billCode` varchar(30) DEFAULT NULL COMMENT '賬單編碼',
  `productName` varchar(20) DEFAULT NULL COMMENT '商品名稱',
  `productDesc` varchar(50) DEFAULT NULL COMMENT '商品描述',
  `productUnit` varchar(60) DEFAULT NULL COMMENT '商品單位',
  `productCount` decimal(20,2) DEFAULT NULL COMMENT '商品數量',
  `totalPrice` decimal(20,2) DEFAULT NULL COMMENT '總金額',
  `isPayment` int(10) DEFAULT NULL COMMENT '是否支付',
  `createdBy` bigint(20) DEFAULT NULL COMMENT '建立者',
  `creationDate` datetime DEFAULT NULL COMMENT '建立時間',
  `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',
  `modifyDate` datetime DEFAULT NULL COMMENT '更新時間',
  `providerId` int(10) DEFAULT NULL COMMENT '提供者id',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `smbms_bill` VALUES (2, 'BILL2016_002', '香皂、肥皂、藥皂', '日用品-皁類', '塊', 1000.00, 10000.00, 2, 1, '2016-03-23 04:20:40', NULL, NULL, 13);
INSERT INTO `smbms_bill` VALUES (3, 'BILL2016_003', '大豆油', '食品-食用油', '斤', 300.00, 5890.00, 2, 1, '2014-12-14 13:02:03', NULL, NULL, 6);
INSERT INTO `smbms_bill` VALUES (4, 'BILL2016_004', '橄欖油', '食品-進口食用油', '斤', 200.00, 9800.00, 2, 1, '2013-10-10 03:12:13', NULL, NULL, 7);
INSERT INTO `smbms_bill` VALUES (5, 'BILL2016_005', '洗潔精', '日用品-廚房清潔', '瓶', 500.00, 7000.00, 2, 1, '2014-12-14 13:02:03', NULL, NULL, 9);
INSERT INTO `smbms_bill` VALUES (6, 'BILL2016_006', '美國大杏仁', '食品-堅果', '袋', 300.00, 5000.00, 2, 1, '2016-04-14 06:08:09', NULL, NULL, 4);
INSERT INTO `smbms_bill` VALUES (7, 'BILL2016_007', '沐浴液、精油', '日用品-沐浴類', '瓶', 500.00, 23000.00, 1, 1, '2016-07-22 10:10:22', NULL, NULL, 14);
INSERT INTO `smbms_bill` VALUES (8, 'BILL2016_008', '不鏽鋼盤碗', '日用品-廚房用具', '個', 600.00, 6000.00, 2, 1, '2016-04-14 05:12:13', NULL, NULL, 14);
INSERT INTO `smbms_bill` VALUES (9, 'BILL2016_009', '塑料杯', '日用品-杯子', '個', 350.00, 1750.00, 2, 1, '2016-02-04 11:40:20', NULL, NULL, 14);
INSERT INTO `smbms_bill` VALUES (10, 'BILL2016_010', '豆瓣醬', '食品-調料', '瓶', 200.00, 2000.00, 2, 1, '2013-10-29 05:07:03', NULL, NULL, 8);
INSERT INTO `smbms_bill` VALUES (11, 'BILL2016_011', '海之藍', '飲料-國酒', '瓶', 50.00, 10000.00, 1, 1, '2016-04-14 16:16:00', NULL, NULL, 1);
INSERT INTO `smbms_bill` VALUES (12, 'BILL2016_012', '芝華士', '飲料-洋酒', '瓶', 20.00, 6000.00, 1, 1, '2016-09-09 17:00:00', NULL, NULL, 1);
INSERT INTO `smbms_bill` VALUES (13, 'BILL2016_013', '長城紅葡萄酒', '飲料-紅酒', '瓶', 60.00, 800.00, 2, 1, '2016-11-14 15:23:00', NULL, NULL, 1);
INSERT INTO `smbms_bill` VALUES (14, 'BILL2016_014', '泰國香米', '食品-大米', '斤', 400.00, 5000.00, 2, 1, '2016-10-09 15:20:00', NULL, NULL, 3);
INSERT INTO `smbms_bill` VALUES (15, 'BILL2016_015', '東北大米', '食品-大米', '斤', 600.00, 4000.00, 2, 1, '2016-11-14 14:00:00', NULL, NULL, 3);
INSERT INTO `smbms_bill` VALUES (16, 'BILL2016_016', '可口可樂', '飲料', '瓶', 2000.00, 6000.00, 2, 1, '2012-03-27 13:03:01', NULL, NULL, 2);
INSERT INTO `smbms_bill` VALUES (17, 'BILL2016_017', '脈動', '飲料', '瓶', 1500.00, 4500.00, 2, 1, '2016-05-10 12:00:00', NULL, NULL, 2);
INSERT INTO `smbms_bill` VALUES (18, 'BILL2016_018', '哇哈哈', '飲料', '瓶', 2000.00, 4000.00, 2, 1, '2015-11-24 15:12:03', NULL, NULL, 2);

點選檢視資料庫provider程式碼

CREATE TABLE `smbms_provider` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `proCode` varchar(15) DEFAULT NULL COMMENT '供應商編碼',
  `proName` varchar(15) DEFAULT NULL COMMENT '供應商名稱',
  `proDesc` varchar(50) DEFAULT NULL COMMENT '供應商描述',
  `proContact` varchar(15) DEFAULT NULL COMMENT '供應商聯絡人',
  `proPhone` varchar(20) DEFAULT NULL COMMENT '供應商電話',
  `userAddress` varchar(30) DEFAULT NULL COMMENT '供應商地址',
  `userFax` varchar(20) DEFAULT NULL COMMENT '供應商傳真',
  `createdBy` bigint(20) DEFAULT NULL COMMENT '建立者',
  `creationDate` datetime DEFAULT NULL COMMENT '建立時間',
  `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',
  `modifyDate` datetime DEFAULT NULL COMMENT '更新時間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `smbms_provider` VALUES (1, 'BJ_GYS001', '北京三木堂商貿有限公司', '長期合作伙伴，主營產品:茅臺、五糧液、郎酒、酒鬼酒、瀘州老窖、賴茅酒、法國紅酒等', '張國強', '13566667777', '北京市豐臺區育芳園北路', '010-58858787', 1, '2013-03-21 16:52:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (2, 'HB_GYS001', '石家莊帥益食品貿易有限公司', '長期合作伙伴，主營產品:飲料、水飲料、植物蛋白飲料、休閒食品、果汁飲料、功能飲料等', '王軍', '13309094212', '河北省石家莊新華區', '0311-67738876', 1, '2016-04-13 04:20:40', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (3, 'GZ_GYS001', '深圳市泰香米業有限公司', '初次合作伙伴，主營產品：良記金輪米,龍輪香米等', '鄭程瀚', '13402013312', '廣東省深圳市福田區深南大道6006華豐大廈', '0755-67776212', 1, '2014-03-21 16:56:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (4, 'GZ_GYS002', '深圳市喜來客商貿有限公司', '長期合作伙伴，主營產品：堅果炒貨.果脯蜜餞.天然花茶.營養豆豆.特色美食.進口食品.海味零食.肉脯肉', '林妮', '18599897645', '廣東省深圳市福龍工業區B2棟3樓西', '0755-67772341', 1, '2013-03-22 16:52:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (5, 'JS_GYS001', '興化佳美調味品廠', '長期合作伙伴，主營產品：天然香辛料、雞精、複合調味料', '徐國洋', '13754444221', '江蘇省興化市林湖工業區', '0523-21299098', 1, '2015-11-22 16:52:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (6, 'BJ_GYS002', '北京納福爾食用油有限公司', '長期合作伙伴，主營產品：山茶油、大豆油、花生油、橄欖油等', '馬鶯', '13422235678', '北京市朝陽區珠江帝景1號樓', '010-588634233', 1, '2012-03-21 17:52:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (7, 'BJ_GYS003', '北京國糧食用油有限公司', '初次合作伙伴，主營產品：花生油、大豆油、小磨油等', '王馳', '13344441135', '北京大興青雲店開發區', '010-588134111', 1, '2016-04-13 00:00:00', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (8, 'ZJ_GYS001', '慈溪市廣和綠色食品廠', '長期合作伙伴，主營產品：豆瓣醬、黃豆醬、甜麵醬，辣椒，大蒜等農產品', '薛聖丹', '18099953223', '浙江省寧波市慈溪周巷小安村', '0574-34449090', 1, '2013-11-21 06:02:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (9, 'GX_GYS001', '優百商貿有限公司', '長期合作伙伴，主營產品：日化產品', '李立國', '13323566543', '廣西南寧市秀廂大道42-1號', '0771-98861134', 1, '2013-03-21 19:52:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (10, 'JS_GYS002', '南京火頭軍資訊科技有限公司', '長期合作伙伴，主營產品：不鏽鋼廚具等', '陳女士', '13098992113', '江蘇省南京市浦口區浦口大道1號新城總部大廈A座903室', '025-86223345', 1, '2013-03-25 16:52:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (11, 'GZ_GYS003', '廣州市白雲區美星五金製品廠', '長期合作伙伴，主營產品：海綿床墊、坐墊、靠墊、海綿枕頭、頭枕等', '樑天', '13562276775', '廣州市白雲區鍾落潭鎮福龍路20號', '020-85542231', 1, '2016-12-21 06:12:17', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (12, 'BJ_GYS004', '北京隆盛日化科技', '長期合作伙伴，主營產品：日化環保清洗劑，家居洗滌專賣、洗滌用品網、牆體除黴劑、牆面黴菌清除劑等', '孫欣', '13689865678', '北京市大興區舊宮', '010-35576786', 1, '2014-11-21 12:51:11', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (13, 'SD_GYS001', '山東豪克華光聯合發展有限公司', '長期合作伙伴，主營產品：洗衣皁、洗衣粉、洗衣液、洗潔精、消殺類、香皂等', '吳洪轉', '13245468787', '山東濟陽濟北工業區仁和街21號', '0531-53362445', 1, '2015-01-28 10:52:07', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (14, 'JS_GYS003', '無錫喜源坤商行', '長期合作伙伴，主營產品：日化品批銷', '週一清', '18567674532', '江蘇無錫盛岸西路', '0510-32274422', 1, '2016-04-23 11:11:11', NULL, NULL);
INSERT INTO `smbms_provider` VALUES (15, 'ZJ_GYS002', '樂擺日用品廠', '長期合作伙伴，主營產品：各種中、高檔塑料杯，塑料樂扣水杯（密封杯）、保鮮杯（保鮮盒）、廣告杯、禮品杯', '王世傑', '13212331567', '浙江省金華市義烏市義東路', '0579-34452321', 1, '2016-08-22 10:01:30', NULL, NULL);

點選檢視資料庫role程式碼

CREATE TABLE `smbms_role` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `roleCode` varchar(30) DEFAULT NULL COMMENT '角色編碼',
  `roleName` varchar(15) DEFAULT NULL COMMENT '角色名稱',
  `createdBy` bigint(20) DEFAULT NULL COMMENT '建立者',
  `creationDate` datetime DEFAULT NULL COMMENT '建立時間',
  `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',
  `modifyDate` datetime DEFAULT NULL COMMENT '更新時間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `smbms_role` VALUES (1, 'SMBMS_ADMIN', '系統管理員', 1, '2016-04-13 00:00:00', NULL, NULL);
INSERT INTO `smbms_role` VALUES (2, 'SMBMS_MANAGER', '經理', 1, '2016-04-13 00:00:00', NULL, NULL);
INSERT INTO `smbms_role` VALUES (3, 'SMBMS_EMPLOYEE', '普通員工', 1, '2016-04-13 00:00:00', NULL, NULL);

點選檢視資料庫user程式碼

CREATE TABLE `smbms_user` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `userCode` varchar(15) DEFAULT NULL COMMENT '使用者編碼',
  `userName` varchar(15) DEFAULT NULL COMMENT '使用者名稱字',
  `userPassword` varchar(20) DEFAULT NULL COMMENT '使用者密碼',
  `gender` int(10) DEFAULT NULL COMMENT '性別',
  `birthday` date DEFAULT NULL COMMENT '出生日期',
  `phone` varchar(20) DEFAULT NULL COMMENT '電話',
  `address` varchar(30) DEFAULT NULL COMMENT '地址',
  `userRole` bigint(20) DEFAULT NULL COMMENT '使用者角色',
  `createdBy` bigint(20) DEFAULT NULL COMMENT '建立者',
  `creationDate` datetime DEFAULT NULL COMMENT '建立時間',
  `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',
  `modifyDate` datetime DEFAULT NULL COMMENT '更新時間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `smbms_user` VALUES (1, 'admin', '111', '111111', 1, '2021-04-22', '13688889999', '北京市海淀區成府路207號', 3, 1, '2013-03-21 16:52:07', 1, '2021-04-22 17:43:02');
INSERT INTO `smbms_user` VALUES (2, 'liming', '李明', '0000000', 2, '1983-12-10', '13688884457', '北京市東城區前門東大街9號', 2, 1, '2014-12-31 19:52:09', NULL, NULL);
INSERT INTO `smbms_user` VALUES (5, 'hanlubiao', '韓路彪', '0000000', 2, '1984-06-05', '18567542321', '北京市朝陽區北辰中心12號', 2, 1, '2014-12-31 19:52:09', NULL, NULL);
INSERT INTO `smbms_user` VALUES (6, 'zhanghua', '張華', '0000000', 1, '1983-06-15', '13544561111', '北京市海淀區學院路61號', 3, 1, '2013-02-11 10:51:17', NULL, NULL);
INSERT INTO `smbms_user` VALUES (7, 'wangyang', '王洋', '0000000', 2, '1982-12-31', '13444561124', '北京市海淀區西二旗輝煌國際16層', 3, 1, '2014-06-11 19:09:07', NULL, NULL);
INSERT INTO `smbms_user` VALUES (8, 'zhaoyan', '趙燕', '0000000', 2, '2021-04-22', '18098764545', '北京市海淀區回龍觀小區10號樓', 2, 1, '2016-04-21 13:54:07', 1, '2021-04-22 17:56:11');
INSERT INTO `smbms_user` VALUES (10, 'sunlei', '孫磊', '0000000', 2, '1981-01-04', '13387676765', '北京市朝陽區管莊新月小區12樓', 3, 1, '2015-05-06 10:52:07', NULL, NULL);
INSERT INTO `smbms_user` VALUES (11, 'sunxing', '孫興', '0000000', 2, '1978-03-12', '13367890900', '北京市朝陽區建國門南大街10號', 3, 1, '2016-11-09 16:51:17', NULL, NULL);
INSERT INTO `smbms_user` VALUES (12, 'zhangchen', '張晨', '0000000', 1, '1986-03-28', '18098765434', '朝陽區管莊路口北柏林愛樂三期13號樓', 3, 1, '2016-08-09 05:52:37', 1, '2016-04-14 14:15:36');
INSERT INTO `smbms_user` VALUES (13, 'dengchao', '鄧超', '0000000', 2, '1981-11-04', '13689674534', '北京市海淀區北航家屬院10號樓', 3, 1, '2016-07-11 08:02:47', NULL, NULL);
INSERT INTO `smbms_user` VALUES (15, 'zhaomin', '趙敏', '0000000', 1, '1987-12-04', '18099897657', '北京市昌平區天通苑3區12號樓', 2, 1, '2015-09-12 12:02:12', NULL, NULL);

3. 當資料庫配置完以後我們開始idea，建立一個Maven Webapp模板專案
4. 然後開始配置Tomcat伺服器
5. 在pom.xml中匯入專案依賴的jar包

點選檢視程式碼

<dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <dependency><!-- servlet包 -->
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
    </dependency>
    <dependency><!-- jstl包 -->
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl-api</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency><!-- jsp包 -->
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.3</version>
    </dependency>
    <dependency><!-- 資料庫包 -->
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.28</version>
    </dependency>
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
  </dependencies>

二、進入idea開始編碼

1. 首先編寫我們的實體類pojo，資料庫表中的資訊與之對應。

點選User類程式碼

package pojo;

import java.util.Date;

public class User {
    private Integer id; //id
    private String userCode; //使用者編碼
    private String userName; //使用者名稱字
    private String userPassword; //使用者密碼
    private Integer gender; //性別
    private Date birthday; //出生日期
    private String phone; //手機號
    private String address; //地址
    private Integer userRole; //使用者角色
    private Integer createBy; //建立者
    private Date creationDate; //建立時間
    private Integer modifyBy; //更新者
    private Date modifyDate; //更新時間

    private Integer age; //年齡
    private String userRoleName; //使用者角色名字

    public Integer getAge() {
        Date date = new Date();
        Integer age = date.getYear() - birthday.getYear();
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getUserRoleName() {
        return userRoleName;
    }

    public void setUserRoleName(String userRoleName) {
        this.userRoleName = userRoleName;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUserCode() {
        return userCode;
    }

    public void setUserCode(String userCode) {
        this.userCode = userCode;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserPassword() {
        return userPassword;
    }

    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }

    public Integer getGender() {
        return gender;
    }

    public void setGender(Integer gender) {
        this.gender = gender;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public Integer getUserRole() {
        return userRole;
    }

    public void setUserRole(Integer userRole) {
        this.userRole = userRole;
    }

    public Integer getCreateBy() {
        return createBy;
    }

    public void setCreateBy(Integer createBy) {
        this.createBy = createBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

點選Role類程式碼

package pojo;

import java.util.Date;

public class Role {
    private Integer id; //id
    private String roleCode; //角色編碼
    private String roleName; //角色名字
    private Integer createdBy; //建立者
    private Date creationDate; //建立時間
    private Integer modifyBy; //更新者
    private Date modifyDate; //更新時間

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getRoleCode() {
        return roleCode;
    }

    public void setRoleCode(String roleCode) {
        this.roleCode = roleCode;
    }

    public String getRoleName() {
        return roleName;
    }

    public void setRoleName(String roleName) {
        this.roleName = roleName;
    }

    public Integer getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

點選Provider程式碼

package pojo;

import java.util.Date;

public class Provider {
    private Integer id; //id
    private String proCode; //供應商編碼
    private String proName; //供應商名字
    private String proDesc; //供應商查詢
    private String proContact; //供應商聯絡人
    private String proPhone; //供應商手機
    private String proAddress; //供應商地址
    private String proFax; //供應商傳真
    private Integer createdBy; //建立者
    private Date creationDate; //建立時間
    private Integer modifyBy; //更新者
    private Date modifyDate; //更新時間

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getProCode() {
        return proCode;
    }

    public void setProCode(String proCode) {
        this.proCode = proCode;
    }

    public String getProName() {
        return proName;
    }

    public void setProName(String proName) {
        this.proName = proName;
    }

    public String getProDesc() {
        return proDesc;
    }

    public void setProDesc(String proDesc) {
        this.proDesc = proDesc;
    }

    public String getProContact() {
        return proContact;
    }

    public void setProContact(String proContact) {
        this.proContact = proContact;
    }

    public String getProPhone() {
        return proPhone;
    }

    public void setProPhone(String proPhone) {
        this.proPhone = proPhone;
    }

    public String getProAddress() {
        return proAddress;
    }

    public void setProAddress(String proAddress) {
        this.proAddress = proAddress;
    }

    public String getProFax() {
        return proFax;
    }

    public void setProFax(String proFax) {
        this.proFax = proFax;
    }

    public Integer getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

點選Bill程式碼

package pojo;

import java.math.BigDecimal;
import java.util.Date;

public class Bill {
    private int id; //id
    private String billCode; //賬單編碼
    private String productName; //商品名稱
    private String productDesc; //商品描述
    private String productUnit; //商品單位
    private BigDecimal productCount; //商品數量
    private BigDecimal totalPrice; //總金額
    private Integer isPayment; //是否支付
    private Integer createdBy; //建立者
    private Date creationDate; //建立時間
    private Integer modifyBy; //更新者
    private Date modifyDate; //更新時間
    private Integer providerId; //供應商id

    private String providerName;//供應商名字

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getBillCode() {
        return billCode;
    }

    public void setBillCode(String billCode) {
        this.billCode = billCode;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public String getProductDesc() {
        return productDesc;
    }

    public void setProductDesc(String productDesc) {
        this.productDesc = productDesc;
    }

    public String getProductUnit() {
        return productUnit;
    }

    public void setProductUnit(String productUnit) {
        this.productUnit = productUnit;
    }

    public BigDecimal getProductCount() {
        return productCount;
    }

    public void setProductCount(BigDecimal productCount) {
        this.productCount = productCount;
    }

    public BigDecimal getTotalPrice() {
        return totalPrice;
    }

    public void setTotalPrice(BigDecimal totalPrice) {
        this.totalPrice = totalPrice;
    }

    public Integer getIsPayment() {
        return isPayment;
    }

    public void setIsPayment(Integer isPayment) {
        this.isPayment = isPayment;
    }

    public Integer getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }

    public Integer getProviderId() {
        return providerId;
    }

    public void setProviderId(Integer providerId) {
        this.providerId = providerId;
    }

    public String getProviderName() {
        return providerName;
    }

    public void setProviderName(String providerName) {
        this.providerName = providerName;
    }
}

2. 然後編寫資料庫連線用的檔案

點選檔案字尾為.properties

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/資料庫名字?useUnicode=true&characterEncoding=utf8
username=賬號
password=密碼

3. idea連線資料庫（不在此展示，自行解決）

4. 編寫過濾器，使我們網頁每次都用utf-8編碼

點選過濾器程式碼

import javax.servlet.*;
import java.io.IOException;

public class Filter implements javax.servlet.Filter {
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        chain.doFilter(request,response);
    }

    public void destroy() {

    }
}

5. 編寫資料庫的公共類，實現增刪改查SRUD功能

package com.meteor.dao;

import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;

//運算元據庫的公共類
public class BaseDao {
    private static final String driver;
    private static final String url;
    private static final String username;
    private static final String password;

    //靜態程式碼塊，隨著類的載入而載入
    static{
        Properties properties = new Properties();//可以讓檔案內容以鍵值對的形式讀取
        //將檔案內容讀出
        InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("db.properties");
        try {
            //properties.load()從輸入位元組流讀取屬性列表（鍵和元素對）。
            properties.load(is);
        } catch (IOException e) {
            e.printStackTrace();
        }
        driver = properties.getProperty("driver");
        url = properties.getProperty("url");
        username = properties.getProperty("username");
        password = properties.getProperty("password");
    }

    //獲取資料庫的連線
    public static Connection getConnection() {
        Connection connection = null;
        try {
            Class.forName(driver);//載入驅動
            //嘗試建立與給定資料庫URL的連線。
            connection = DriverManager.getConnection(url, username, password);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return connection;
    }

    //編寫查詢公共方法
    public static ResultSet execute(Connection connection,String sql,Object[] params,ResultSet resultSet,PreparedStatement preparedStatement) throws SQLException {
        //connection.prepareStatement(sql)建立一個 PreparedStatement物件，用於將引數化的SQL語句傳送到資料庫。
        preparedStatement = connection.prepareStatement(sql);
        for (int i = 0; i < params.length; i++) {
            preparedStatement.setObject(i+1,params[i]);//使用給定物件設定指定引數的值。
        }
        resultSet = preparedStatement.executeQuery();//返回查詢結果
        return resultSet;
    }

    //編寫增刪改公共方法
    public static int execute(Connection connection,String sql,Object[] params,PreparedStatement preparedStatement) throws SQLException {
        //connection.prepareStatement(sql)建立一個 PreparedStatement物件，用於將引數化的SQL語句傳送到資料庫。
        preparedStatement = connection.prepareStatement(sql);
        for (int i = 0; i < params.length; i++) {
            preparedStatement.setObject(i+1,params[i]);
        }
        int updateRows = preparedStatement.executeUpdate();
        return updateRows;
    }

    //釋放資源
    public static boolean closeResource(Connection connection,PreparedStatement preparedStatement,ResultSet resultSet) {
        boolean flag = true;
        if(resultSet != null) {
            try {
                resultSet.close();
                //GC回收機制，如果物件為null，就會被回收。
                resultSet = null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag = false;
            }
        }

        if(preparedStatement != null) {
            try {
                preparedStatement.close();
                //GC回收機制，如果物件為null，就會被回收。
                preparedStatement = null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag = false;
            }
        }

        if(connection != null) {
            try {
                connection.close();
                //GC回收機制，如果物件為null，就會被回收。
                connection = null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag = false;
            }
        }
        return flag;
    }
}

6. 編寫service服務層程式碼，驗證登入是否正確

import dao.BaseDao;
import dao.user.UserDao;
import dao.user.UserDaoImpl;
import pojo.User;

import java.sql.Connection;

public class UserServiceImpl implements UserService{
    public User login(String userCode, String password) {
        UserDaoImpl userDao = new UserDaoImpl();
        Connection connection = BaseDao.getConnection();//連線資料庫
        User user = userDao.getLoginUser(connection, userCode);//獲得登入使用者資訊
        //對登入的使用者賬號密碼進行判斷
        if(user.getUserPassword() == null ? password == null : user.getUserPassword().equals(password)) {
            BaseDao.closeResource(connection,null,null);
            return user;
        }else {
            BaseDao.closeResource(connection,null,null);
            System.out.println("密碼錯誤");
            return null;
        }
    }
}

7.編寫servlet業務層程式碼，和前端互動

package com.meteor.servlet.user;

import com.meteor.pojo.User;
import com.meteor.service.user.UserService;
import com.meteor.service.user.UserServiceImpl;
import com.meteor.util.Constants;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class LoginServlet extends HttpServlet {

    //控制層呼叫業務層程式碼
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("別出bug");
        //獲取前端輸入的使用者名稱和密碼
        String userCode = req.getParameter("userCode");
        String userPassword = req.getParameter("userPassword");
        //和資料庫的使用者密碼對比，呼叫業務層
        UserServiceImpl userService = new UserServiceImpl();
        User user = userService.login(userCode, userPassword);

        if(user != null) { //查有此人
            //將使用者資訊放到session中
            req.getSession().setAttribute(Constants.USER_SESSION,user);
            //登入成功，跳轉到內部主頁
            resp.sendRedirect("jsp/frame.jsp");
        }else {
            //查無此人，轉回登入頁面
            req.setAttribute("error","使用者密碼不正確");
            req.getRequestDispatcher("login.jsp").forward(req,resp);
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}

8. 工具類用來存放session值

點選檢視程式碼

public class Constants {
    public static final String USER_SESSION = "userSession";
}

9. 在web.xml設定servlet和filter過濾器

<!-- 字元編碼過濾器 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>com.meteor.filter.CharacterEncodingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 設定歡迎頁面 -->
    <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
    </welcome-file-list>

    <servlet>
        <servlet-name>LoginServlet</servlet-name>
        <servlet-class>com.meteor.servlet.user.LoginServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>LoginServlet</servlet-name>
        <url-pattern>/login.do</url-pattern>
    </servlet-mapping>

三、總結

• 前端內碼表面都是cpoy的，若想獲取前端程式碼可私信我。
• 對於smdms登入內容就總結這麼多，也是跟著狂神學的，程式碼也沒怎麼改進，只是想自己複習理解一遍。如果有不足之處，希望大家多多包涵，多多支援。如果有不懂的地方可以直接私信問我，歡迎來訪！
• 我將會繼續更新關於Java的學習知識，以及此專案的後續功能，感興趣的小夥伴可以關注一下。
• 文章寫得比較走心，用了很長時間，絕對不是copy過來的！
• 尊重每一位學習知識的人，同時也尊重每一位分享知識的人。