smdms超市订单管理系统之登录功能

一、超市订单管理系统准备阶段

  • Supermarket order management system

  1. 创建数据库
    smdms超市订单管理系统之登录功能

  2. 数据库代码放置如下

点击查看数据库address代码 
CREATE TABLE `smbms_address` (   `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键',   `contact` varchar(15) DEFAULT NULL COMMENT '联系人姓名',   `addressDesc` varchar(50) DEFAULT NULL COMMENT '收货地址',   `postCode` varchar(15) DEFAULT NULL COMMENT '邮编',   `tel` int(20) DEFAULT NULL COMMENT '联系人电话',   `createdBy` varchar(20) DEFAULT NULL COMMENT '创建者',   `creationDate` datetime DEFAULT NULL COMMENT '创建时间',   `modifyBy` bigint(20) DEFAULT NULL COMMENT '修改者',   `modifyDate` datetime DEFAULT NULL COMMENT '修改时间',   `userId` bigint(20) DEFAULT NULL COMMENT '用户ID',   PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; INSERT INTO `smbms_address` VALUES (1, '王丽', '北京市东城区东交民巷44号', '100010', '13678789999', 1, '2016-04-13 00:00:00', NULL, NULL, 1); INSERT INTO `smbms_address` VALUES (2, '张红丽', '北京市海淀区丹棱街3号', '100000', '18567672312', 1, '2016-04-13 00:00:00', NULL, NULL, 1); INSERT INTO `smbms_address` VALUES (3, '任志强', '北京市东城区美术馆后街23号', '100021', '13387906742', 1, '2016-04-13 00:00:00', NULL, NULL, 1); INSERT INTO `smbms_address` VALUES (4, '曹颖', '北京市朝阳区朝阳门南大街14号', '100053', '13568902323', 1, '2016-04-13 00:00:00', NULL, NULL, 2); INSERT INTO `smbms_address` VALUES (5, '李慧', '北京市西城区三里河路南三巷3号', '100032', '18032356666', 1, '2016-04-13 00:00:00', NULL, NULL, 3); INSERT INTO `smbms_address` VALUES (6, '王国强', '北京市顺义区高丽营镇金马工业区18号', '100061', '13787882222', 1, '2016-04-13 00:00:00', NULL, NULL, 3);
点击查看数据库bill代码 
CREATE TABLE `smbms_bill` (   `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',   `billCode` varchar(30) DEFAULT NULL COMMENT '账单编码',   `productName` varchar(20) DEFAULT NULL COMMENT '商品名称',   `productDesc` varchar(50) DEFAULT NULL COMMENT '商品描述',   `productUnit` varchar(60) DEFAULT NULL COMMENT '商品单位',   `productCount` decimal(20,2) DEFAULT NULL COMMENT '商品数量',   `totalPrice` decimal(20,2) DEFAULT NULL COMMENT '总金额',   `isPayment` int(10) DEFAULT NULL COMMENT '是否支付',   `createdBy` bigint(20) DEFAULT NULL COMMENT '创建者',   `creationDate` datetime DEFAULT NULL COMMENT '创建时间',   `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',   `modifyDate` datetime DEFAULT NULL COMMENT '更新时间',   `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、药皂', '日用品-皂类', '块', 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', '橄榄油', '食品-进口食用油', '斤', 200.00, 9800.00, 2, 1, '2013-10-10 03:12:13', NULL, NULL, 7); INSERT INTO `smbms_bill` VALUES (5, 'BILL2016_005', '洗洁精', '日用品-厨房清洁', '瓶', 500.00, 7000.00, 2, 1, '2014-12-14 13:02:03', NULL, NULL, 9); INSERT INTO `smbms_bill` VALUES (6, 'BILL2016_006', '美国大杏仁', '食品-坚果', '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-沐浴类', '瓶', 500.00, 23000.00, 1, 1, '2016-07-22 10:10:22', NULL, NULL, 14); INSERT INTO `smbms_bill` VALUES (8, 'BILL2016_008', '不锈钢盘碗', '日用品-厨房用具', '个', 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', '个', 350.00, 1750.00, 2, 1, '2016-02-04 11:40:20', NULL, NULL, 14); INSERT INTO `smbms_bill` VALUES (10, 'BILL2016_010', '豆瓣酱', '食品-调料', '瓶', 200.00, 2000.00, 2, 1, '2013-10-29 05:07:03', NULL, NULL, 8); INSERT INTO `smbms_bill` VALUES (11, 'BILL2016_011', '海之蓝', '饮料-国酒', '瓶', 50.00, 10000.00, 1, 1, '2016-04-14 16:16:00', NULL, NULL, 1); INSERT INTO `smbms_bill` VALUES (12, 'BILL2016_012', '芝华士', '饮料-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', '长城红葡萄酒', '饮料-红酒', '瓶', 60.00, 800.00, 2, 1, '2016-11-14 15:23:00', NULL, NULL, 1); INSERT INTO `smbms_bill` VALUES (14, 'BILL2016_014', '泰国香米', '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', '东北大米', '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', '可口可乐', '饮料', '瓶', 2000.00, 6000.00, 2, 1, '2012-03-27 13:03:01', NULL, NULL, 2); INSERT INTO `smbms_bill` VALUES (17, 'BILL2016_017', '脉动', '饮料', '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', '饮料', '瓶', 2000.00, 4000.00, 2, 1, '2015-11-24 15:12:03', NULL, NULL, 2);
点击查看数据库provider代码 
CREATE TABLE `smbms_provider` (   `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',   `proCode` varchar(15) DEFAULT NULL COMMENT '供应商编码',   `proName` varchar(15) DEFAULT NULL COMMENT '供应商名称',   `proDesc` varchar(50) DEFAULT NULL COMMENT '供应商描述',   `proContact` varchar(15) DEFAULT NULL COMMENT '供应商联系人',   `proPhone` varchar(20) DEFAULT NULL COMMENT '供应商电话',   `userAddress` varchar(30) DEFAULT NULL COMMENT '供应商地址',   `userFax` varchar(20) DEFAULT NULL COMMENT '供应商传真',   `createdBy` bigint(20) DEFAULT NULL COMMENT '创建者',   `creationDate` datetime DEFAULT NULL COMMENT '创建时间',   `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',   `modifyDate` datetime DEFAULT NULL COMMENT '更新时间',   PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; INSERT INTO `smbms_provider` VALUES (1, 'BJ_GYS001', '北京三木堂商贸有限公司', '长期合作伙伴，主营产品:茅台、五粮液、郎酒、酒鬼酒、泸州老窖、赖茅酒、法国红酒等', '张国强', '13566667777', '北京市丰台区育芳园北路', '010-58858787', 1, '2013-03-21 16:52:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (2, 'HB_GYS001', '石家庄帅益食品贸易有限公司', '长期合作伙伴，主营产品:饮料、水饮料、植物蛋白饮料、休闲食品、果汁饮料、功能饮料等', '王军', '13309094212', '河北省石家庄新华区', '0311-67738876', 1, '2016-04-13 04:20:40', NULL, NULL); INSERT INTO `smbms_provider` VALUES (3, 'GZ_GYS001', '深圳市泰香米业有限公司', '初次合作伙伴，主营产品：良记金轮米,龙轮香米等', '郑程瀚', '13402013312', '广东省深圳市福田区深南大道6006华丰大厦', '0755-67776212', 1, '2014-03-21 16:56:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (4, 'GZ_GYS002', '深圳市喜来客商贸有限公司', '长期合作伙伴，主营产品：坚果炒货.果脯蜜饯.天然花茶.营养豆豆.特色美食.进口食品.海味零食.肉脯肉', '林妮', '18599897645', '广东省深圳市福龙工业区B2栋3楼西', '0755-67772341', 1, '2013-03-22 16:52:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (5, 'JS_GYS001', '兴化佳美调味品厂', '长期合作伙伴，主营产品：天然香辛料、鸡精、复合调味料', '徐国洋', '13754444221', '江苏省兴化市林湖工业区', '0523-21299098', 1, '2015-11-22 16:52:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (6, 'BJ_GYS002', '北京纳福尔食用油有限公司', '长期合作伙伴，主营产品：山茶油、大豆油、花生油、橄榄油等', '马莺', '13422235678', '北京市朝阳区珠江帝景1号楼', '010-588634233', 1, '2012-03-21 17:52:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (7, 'BJ_GYS003', '北京国粮食用油有限公司', '初次合作伙伴，主营产品：花生油、大豆油、小磨油等', '王驰', '13344441135', '北京大兴青云店开发区', '010-588134111', 1, '2016-04-13 00:00:00', NULL, NULL); INSERT INTO `smbms_provider` VALUES (8, 'ZJ_GYS001', '慈溪市广和绿色食品厂', '长期合作伙伴，主营产品：豆瓣酱、黄豆酱、甜面酱，辣椒，大蒜等农产品', '薛圣丹', '18099953223', '浙江省宁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', '优百商贸有限公司', '长期合作伙伴，主营产品：日化产品', '李立国', '13323566543', '广西南宁市秀厢大道42-1号', '0771-98861134', 1, '2013-03-21 19:52:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (10, 'JS_GYS002', '南京火头军信息技术有限公司', '长期合作伙伴，主营产品：不锈钢厨具等', '陈女士', '13098992113', '江苏省南京市浦口区浦口大道1号新城总部大厦A座903室', '025-86223345', 1, '2013-03-25 16:52:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (11, 'GZ_GYS003', '广州市白云区美星五金制品厂', '长期合作伙伴，主营产品：海绵床垫、坐垫、靠垫、海绵枕头、头枕等', '梁天', '13562276775', '广州市白云区钟落潭镇福龙路20号', '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', '长期合作伙伴，主营产品：日化环保清洗剂，家居洗涤专卖、洗涤用品网、墙体除霉剂、墙面霉菌清除剂等', '孙欣', '13689865678', '北京市大兴区旧宫', '010-35576786', 1, '2014-11-21 12:51:11', NULL, NULL); INSERT INTO `smbms_provider` VALUES (13, 'SD_GYS001', '山东豪克华光联合发展有限公司', '长期合作伙伴，主营产品：洗衣皂、洗衣粉、洗衣液、洗洁精、消杀类、香皂等', '吴洪转', '13245468787', '山东济阳济北工业区仁和街21号', '0531-53362445', 1, '2015-01-28 10:52:07', NULL, NULL); INSERT INTO `smbms_provider` VALUES (14, 'JS_GYS003', '无锡喜源坤商行', '长期合作伙伴，主营产品：日化品批销', '周一清', '18567674532', '江苏无锡盛岸西路', '0510-32274422', 1, '2016-04-23 11:11:11', NULL, NULL); INSERT INTO `smbms_provider` VALUES (15, 'ZJ_GYS002', '乐摆日用品厂', '长期合作伙伴，主营产品：各种中、高档塑料杯，塑料乐扣水杯（密封杯）、保鲜杯（保鲜盒）、广告杯、礼品杯', '王世杰', '13212331567', '浙江省金华市义乌市义东路', '0579-34452321', 1, '2016-08-22 10:01:30', NULL, NULL);
点击查看数据库role代码 
CREATE TABLE `smbms_role` (   `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',   `roleCode` varchar(30) DEFAULT NULL COMMENT '角色编码',   `roleName` varchar(15) DEFAULT NULL COMMENT '角色名称',   `createdBy` bigint(20) DEFAULT NULL COMMENT '创建者',   `creationDate` datetime DEFAULT NULL COMMENT '创建时间',   `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',   `modifyDate` datetime DEFAULT NULL COMMENT '更新时间',   PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; INSERT INTO `smbms_role` VALUES (1, 'SMBMS_ADMIN', '系统管理员', 1, '2016-04-13 00:00:00', NULL, NULL); INSERT INTO `smbms_role` VALUES (2, 'SMBMS_MANAGER', '经理', 1, '2016-04-13 00:00:00', NULL, NULL); INSERT INTO `smbms_role` VALUES (3, 'SMBMS_EMPLOYEE', '普通员工', 1, '2016-04-13 00:00:00', NULL, NULL);
点击查看数据库user代码 
CREATE TABLE `smbms_user` (   `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',   `userCode` varchar(15) DEFAULT NULL COMMENT '用户编码',   `userName` varchar(15) DEFAULT NULL COMMENT '用户名字',   `userPassword` varchar(20) DEFAULT NULL COMMENT '用户密码',   `gender` int(10) DEFAULT NULL COMMENT '性别',   `birthday` date DEFAULT NULL COMMENT '出生日期',   `phone` varchar(20) DEFAULT NULL COMMENT '电话',   `address` varchar(30) DEFAULT NULL COMMENT '地址',   `userRole` bigint(20) DEFAULT NULL COMMENT '用户角色',   `createdBy` bigint(20) DEFAULT NULL COMMENT '创建者',   `creationDate` datetime DEFAULT NULL COMMENT '创建时间',   `modifyBy` bigint(20) DEFAULT NULL COMMENT '更新者',   `modifyDate` datetime DEFAULT NULL COMMENT '更新时间',   PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; INSERT INTO `smbms_user` VALUES (1, 'admin', '111', '111111', 1, '2021-04-22', '13688889999', '北京市海淀区成府路207号', 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', '北京市东城区前门东大街9号', 2, 1, '2014-12-31 19:52:09', NULL, NULL); INSERT INTO `smbms_user` VALUES (5, 'hanlubiao', '韩路彪', '0000000', 2, '1984-06-05', '18567542321', '北京市朝阳区北辰中心12号', 2, 1, '2014-12-31 19:52:09', NULL, NULL); INSERT INTO `smbms_user` VALUES (6, 'zhanghua', '张华', '0000000', 1, '1983-06-15', '13544561111', '北京市海淀区学院路61号', 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', '北京市海淀区西二旗辉煌国际16层', 3, 1, '2014-06-11 19:09:07', NULL, NULL); INSERT INTO `smbms_user` VALUES (8, 'zhaoyan', '赵燕', '0000000', 2, '2021-04-22', '18098764545', '北京市海淀区回龙观小区10号楼', 2, 1, '2016-04-21 13:54:07', 1, '2021-04-22 17:56:11'); INSERT INTO `smbms_user` VALUES (10, 'sunlei', '孙磊', '0000000', 2, '1981-01-04', '13387676765', '北京市朝阳区管庄新月小区12楼', 3, 1, '2015-05-06 10:52:07', NULL, NULL); INSERT INTO `smbms_user` VALUES (11, 'sunxing', '孙兴', '0000000', 2, '1978-03-12', '13367890900', '北京市朝阳区建国门南大街10号', 3, 1, '2016-11-09 16:51:17', NULL, NULL); INSERT INTO `smbms_user` VALUES (12, 'zhangchen', '张晨', '0000000', 1, '1986-03-28', '18098765434', '朝阳区管庄路口北柏林爱乐三期13号楼', 3, 1, '2016-08-09 05:52:37', 1, '2016-04-14 14:15:36'); INSERT INTO `smbms_user` VALUES (13, 'dengchao', '邓超', '0000000', 2, '1981-11-04', '13689674534', '北京市海淀区北航家属院10号楼', 3, 1, '2016-07-11 08:02:47', NULL, NULL); INSERT INTO `smbms_user` VALUES (15, 'zhaomin', '赵敏', '0000000', 1, '1987-12-04', '18099897657', '北京市昌平区天通苑3区12号楼', 2, 1, '2015-09-12 12:02:12', NULL, NULL);
  1. 当数据库配置完以后我们开始idea，创建一个Maven Webapp模板项目
  2. 然后开始配置Tomcat服务器
  3. 在pom.xml中导入项目依赖的jar包
点击查看代码 
<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><!-- 数据库包 -->       <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、进入idea开始编码

  1. 首先编写我们的实体类pojo，数据库表中的信息与之对应。
点击User类代码 
package pojo;  import java.util.Date;  public class User {     private Integer id; //id     private String userCode; //用户编码     private String userName; //用户名字     private String userPassword; //用户密码     private Integer gender; //性别     private Date birthday; //出生日期     private String phone; //手机号     private String address; //地址     private Integer userRole; //用户角色     private Integer createBy; //创建者     private Date creationDate; //创建时间     private Integer modifyBy; //更新者     private Date modifyDate; //更新时间      private Integer age; //年龄     private String userRoleName; //用户角色名字      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;     } }
点击Role类代码 
package pojo;  import java.util.Date;  public class Role {     private Integer id; //id     private String roleCode; //角色编码     private String roleName; //角色名字     private Integer createdBy; //创建者     private Date creationDate; //创建时间     private Integer modifyBy; //更新者     private Date modifyDate; //更新时间      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;     } }
点击Provider代码 
package pojo;  import java.util.Date;  public class Provider {     private Integer id; //id     private String proCode; //供应商编码     private String proName; //供应商名字     private String proDesc; //供应商查询     private String proContact; //供应商联系人     private String proPhone; //供应商手机     private String proAddress; //供应商地址     private String proFax; //供应商传真     private Integer createdBy; //创建者     private Date creationDate; //创建时间     private Integer modifyBy; //更新者     private Date modifyDate; //更新时间      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;     } }
点击Bill代码 
package pojo;  import java.math.BigDecimal; import java.util.Date;  public class Bill {     private int id; //id     private String billCode; //账单编码     private String productName; //商品名称     private String productDesc; //商品描述     private String productUnit; //商品单位     private BigDecimal productCount; //商品数量     private BigDecimal totalPrice; //总金额     private Integer isPayment; //是否支付     private Integer createdBy; //创建者     private Date creationDate; //创建时间     private Integer modifyBy; //更新者     private Date modifyDate; //更新时间     private Integer providerId; //供应商id      private String providerName;//供应商名字      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;     } }
  1. 然后编写数据库连接用的文件
点击文件后缀为.properties 
driver=com.mysql.cj.jdbc.Driver url=jdbc:mysql://localhost:3306/数据库名字?useUnicode=true&characterEncoding=utf8 username=账号 password=密码

  1. idea连接数据库（不在此展示，自行解决）

  2. 编写过滤器，使我们网页每次都用utf-8编码

点击过滤器代码 
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() {      } }
  1. 编写数据库的公共类，实现增删改查SRUD功能
package com.meteor.dao;  import java.io.IOException; import java.io.InputStream; import java.sql.*; import java.util.Properties;  //操作数据库的公共类 public class BaseDao {     private static final String driver;     private static final String url;     private static final String username;     private static final String password;      //静态代码块，随着类的加载而加载     static{         Properties properties = new Properties();//可以让文件内容以键值对的形式读取         //将文件内容读出         InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("db.properties");         try {             //properties.load()从输入字节流读取属性列表（键和元素对）。             properties.load(is);         } catch (IOException e) {             e.printStackTrace();         }         driver = properties.getProperty("driver");         url = properties.getProperty("url");         username = properties.getProperty("username");         password = properties.getProperty("password");     }      //获取数据库的连接     public static Connection getConnection() {         Connection connection = null;         try {             Class.forName(driver);//加载驱动             //尝试建立与给定数据库URL的连接。             connection = DriverManager.getConnection(url, username, password);         } catch (Exception e) {             e.printStackTrace();         }         return connection;     }      //编写查询公共方法     public static ResultSet execute(Connection connection,String sql,Object[] params,ResultSet resultSet,PreparedStatement preparedStatement) throws SQLException {         //connection.prepareStatement(sql)创建一个 PreparedStatement对象，用于将参数化的SQL语句发送到数据库。         preparedStatement = connection.prepareStatement(sql);         for (int i = 0; i < params.length; i++) {             preparedStatement.setObject(i+1,params[i]);//使用给定对象设置指定参数的值。         }         resultSet = preparedStatement.executeQuery();//返回查询结果         return resultSet;     }      //编写增删改公共方法     public static int execute(Connection connection,String sql,Object[] params,PreparedStatement preparedStatement) throws SQLException {         //connection.prepareStatement(sql)创建一个 PreparedStatement对象，用于将参数化的SQL语句发送到数据库。         preparedStatement = connection.prepareStatement(sql);         for (int i = 0; i < params.length; i++) {             preparedStatement.setObject(i+1,params[i]);         }         int updateRows = preparedStatement.executeUpdate();         return updateRows;     }      //释放资源     public static boolean closeResource(Connection connection,PreparedStatement preparedStatement,ResultSet resultSet) {         boolean flag = true;         if(resultSet != null) {             try {                 resultSet.close();                 //GC回收机制，如果对象为null，就会被回收。                 resultSet = null;             } catch (SQLException e) {                 e.printStackTrace();                 flag = false;             }         }          if(preparedStatement != null) {             try {                 preparedStatement.close();                 //GC回收机制，如果对象为null，就会被回收。                 preparedStatement = null;             } catch (SQLException e) {                 e.printStackTrace();                 flag = false;             }         }          if(connection != null) {             try {                 connection.close();                 //GC回收机制，如果对象为null，就会被回收。                 connection = null;             } catch (SQLException e) {                 e.printStackTrace();                 flag = false;             }         }         return flag;     } }
  1. 编写service服务层代码，验证登录是否正确
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();//连接数据库         User user = userDao.getLoginUser(connection, userCode);//获得登录用户信息         //对登录的用户账号密码进行判断         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("密码错误");             return null;         }     } }

7.编写servlet业务层代码，和前端交互

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 {      //控制层调用业务层代码     @Override     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {         System.out.println("别出bug");         //获取前端输入的用户名和密码         String userCode = req.getParameter("userCode");         String userPassword = req.getParameter("userPassword");         //和数据库的用户密码对比，调用业务层         UserServiceImpl userService = new UserServiceImpl();         User user = userService.login(userCode, userPassword);          if(user != null) { //查有此人             //将用户信息放到session中             req.getSession().setAttribute(Constants.USER_SESSION,user);             //登录成功，跳转到内部主页             resp.sendRedirect("jsp/frame.jsp");         }else {             //查无此人，转回登录页面             req.setAttribute("error","用户密码不正确");             req.getRequestDispatcher("login.jsp").forward(req,resp);         }     }      @Override     protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {         doGet(req, resp);     } }
  1. 工具类用来存放session值
点击查看代码 
 public class Constants {     public static final String USER_SESSION = "userSession"; }
  1. 在web.xml设置servlet和filter过滤器
 <!-- 字符编码过滤器 -->     <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>      <!-- 设置欢迎页面 -->     <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、总结

  • 前端代码页面都是cpoy的，若想获取前端代码可私信我。
  • 对于smdms登录内容就总结这么多，也是跟着狂神学的，代码也没怎么改进，只是想自己复习理解一遍。如果有不足之处，希望大家多多包涵，多多支持。如果有不懂的地方可以直接私信问我，欢迎来访！
  • 我将会继续更新关于Java的学习知识，以及此项目的后续功能，感兴趣的小伙伴可以关注一下。
  • 文章写得比较走心，用了很长时间，绝对不是copy过来的！
  • 尊重每一位学习知识的人，同时也尊重每一位分享知识的人。

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