写项目建议从底层向上写！
1.准备工作
1.1基本架构
超市订单管理系统
1.2在数据库中建立对应的表
CREATE DATABASE `smbms`;
USE `smbms`;
DROP TABLE IF EXISTS `smbms_address`;
CREATE TABLE `smbms_address` (
`id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`contact` VARCHAR(15) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '联系人姓名',
`addressDesc` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '收货地址明细',
`postCode` VARCHAR(15) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '邮编',
`tel` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '联系人电话',
`createdBy` BIGINT(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 AUTO_INCREMENT=7 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `smbms_address`(`id`,`contact`,`addressDesc`,`postCode`,`tel`,`createdBy`,`creationDate`,`modifyBy`,`modifyDate`,`userId`) 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),(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),(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),(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),(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),(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);
DROP TABLE IF EXISTS `smbms_bill`;
CREATE TABLE `smbms_bill` (
`id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`billCode` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '账单编码',
`productName` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '商品名称',
`productDesc` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '商品描述',
`productUnit` VARCHAR(10) COLLATE utf8_unicode_ci 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 '商品总额',
`isPayment` INT(10) DEFAULT NULL COMMENT '是否支付（1：未支付 2：已支付）',
`createdBy` BIGINT(20) DEFAULT NULL COMMENT '创建者（userId）',
`creationDate` DATETIME DEFAULT NULL COMMENT '创建时间',
`modifyBy` BIGINT(20) DEFAULT NULL COMMENT '更新者（userId）',
`modifyDate` DATETIME DEFAULT NULL COMMENT '更新时间',
`providerId` BIGINT(20) DEFAULT NULL COMMENT '供应商ID',
PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=19 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `smbms_bill`(`id`,`billCode`,`productName`,`productDesc`,`productUnit`,`productCount`,`totalPrice`,`isPayment`,`createdBy`,`creationDate`,`modifyBy`,`modifyDate`,`providerId`) 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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(17,'BILL2016_017','脉动','饮料','瓶','1500.00','4500.00',2,1,'2016-05-10 12:00:00',NULL,NULL,2),(18,'BILL2016_018','哇哈哈','饮料','瓶','2000.00','4000.00',2,1,'2015-11-24 15:12:03',NULL,NULL,2);
DROP TABLE IF EXISTS `smbms_provider`;
CREATE TABLE `smbms_provider` (
`id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`proCode` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '供应商编码',
`proName` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '供应商名称',
`proDesc` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '供应商详细描述',
`proContact` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '供应商联系人',
`proPhone` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '联系电话',
`proAddress` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '地址',
`proFax` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '传真',
`createdBy` BIGINT(20) DEFAULT NULL COMMENT '创建者（userId）',
`creationDate` DATETIME DEFAULT NULL COMMENT '创建时间',
`modifyDate` DATETIME DEFAULT NULL COMMENT '更新时间',
`modifyBy` BIGINT(20) DEFAULT NULL COMMENT '更新者（userId）',
PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=16 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `smbms_provider`(`id`,`proCode`,`proName`,`proDesc`,`proContact`,`proPhone`,`proAddress`,`proFax`,`createdBy`,`creationDate`,`modifyDate`,`modifyBy`) 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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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),(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);
DROP TABLE IF EXISTS `smbms_role`;
CREATE TABLE `smbms_role` (
`id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`roleCode` VARCHAR(15) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '角色编码',
`roleName` VARCHAR(15) COLLATE utf8_unicode_ci 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 '修改者',
`modifyDate` DATETIME DEFAULT NULL COMMENT '修改时间',
PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `smbms_role`(`id`,`roleCode`,`roleName`,`createdBy`,`creationDate`,`modifyBy`,`modifyDate`) VALUES (1,'SMBMS_ADMIN','系统管理员',1,'2016-04-13 00:00:00',NULL,NULL),(2,'SMBMS_MANAGER','经理',1,'2016-04-13 00:00:00',NULL,NULL),(3,'SMBMS_EMPLOYEE','普通员工',1,'2016-04-13 00:00:00',NULL,NULL);
DROP TABLE IF EXISTS `smbms_user`;
CREATE TABLE `smbms_user` (
`id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`userCode` VARCHAR(15) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '用户编码',
`userName` VARCHAR(15) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '用户名称',
`userPassword` VARCHAR(15) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '用户密码',
`gender` INT(10) DEFAULT NULL COMMENT '性别（1:女、 2:男）',
`birthday` DATE DEFAULT NULL COMMENT '出生日期',
`phone` VARCHAR(15) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '手机',
`address` VARCHAR(30) COLLATE utf8_unicode_ci DEFAULT NULL COMMENT '地址',
`userRole` BIGINT(20) DEFAULT NULL COMMENT '用户角色（取自角色表-角色id）',
`createdBy` BIGINT(20) DEFAULT NULL COMMENT '创建者（userId）',
`creationDate` DATETIME DEFAULT NULL COMMENT '创建时间',
`modifyBy` BIGINT(20) DEFAULT NULL COMMENT '更新者（userId）',
`modifyDate` DATETIME DEFAULT NULL COMMENT '更新时间',
PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=16 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `smbms_user`(`id`,`userCode`,`userName`,`userPassword`,`gender`,`birthday`,`phone`,`address`,`userRole`,`createdBy`,`creationDate`,`modifyBy`,`modifyDate`) VALUES (1,'admin','系统管理员','1234567',1,'1983-10-10','13688889999','北京市海淀区成府路207号',1,1,'2013-03-21 16:52:07',NULL,NULL),(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),(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),(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),(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),(8,'zhaoyan','赵燕','0000000',1,'1986-03-07','18098764545','北京市海淀区回龙观小区10号楼',3,1,'2016-04-21 13:54:07',NULL,NULL),(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),(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),(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'),(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),(14,'yangguo','杨过','0000000',2,'1980-01-01','13388886623','北京市朝阳区北苑家园茉莉园20号楼',3,1,'2015-02-01 03:52:07',NULL,NULL),(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);
1.3项目搭建
- 使用maven，不用导入jar包
- 不使用maven，手动导入jar包
1.3.1步骤：
1.创建新项目
这里我们使用maven且是webapp创建一个新的项目。
2.配置tomcat
3.测试
测试项目是否能跑起来
4.jar包
导入项目中可能会遇到的jar包
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
</dependencies>
5.包结构
6.编写实体类
ORM映射：对应数据库的表格
在pojo包下编写实体类
User类
package moli.pojo;
import java.util.Date;
public class User {
private Integer id; //id
private String userCode; //用户编码
private String userName; //用户名称
private String userPassword; //用户密码
private Integer gender; //性别
private Date birthday; //出生日期
private String phone; //电话
private String address; //地址
private Integer userRole; //用户角色
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 age;//年龄
private String userRoleName; //用户角色名称
public String getUserRoleName() {
return userRoleName;
}
public void setUserRoleName(String userRoleName) {
this.userRoleName = userRoleName;
}
public Integer getAge() {
Date date = new Date();
Integer age = date.getYear()-birthday.getYear();
return age;
}
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 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;
}
}
Bill类
package moli.pojo;
import java.math.BigDecimal;
import java.util.Date;
public class Bill {
private Integer 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 providerId; //供应商ID
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 String providerName;//供应商名称
public String getProviderName() {
return providerName;
}
public void setProviderName(String providerName) {
this.providerName = providerName;
}
public Integer getId() {
return id;
}
public void setId(Integer 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 getProviderId() {
return providerId;
}
public void setProviderId(Integer providerId) {
this.providerId = providerId;
}
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;
}
}
Role类
package moli.pojo;
import java.util.Date;
public class Role {
private Integer id; //id
private String roleCode; //角色编码
private String roleName; //角色名称
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;
}
}
Provider类
package moli.pojo;
import java.util.Date;
public class Provider {
private Integer id; //id
private String proCode; //供应商编码
private String proName; //供应商名称
private String proDesc; //供应商描述
private String proContact; //供应商联系人
private String proPhone; //供应商电话
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;
}
}
7.编写基础公共类
- 数据库配置文件:
driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/smbms?serverTimezone=UTC&useSSL=true&useUnicode=true&characterEncoding=utf-8
username=root
password=1234
-
编写数据库公共类
在Dao包下编写
package moli.dao; import java.io.IOException; import java.io.InputStream; import java.sql.*; import java.util.Properties; //操作数据库公共类 public class BaseDao { private static String driver; private static String url; private static String usename; private static String password; //静待代码块，启动就会加载 static { Properties properties = new Properties(); //通过反射，类加载器获取资源 InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("db.properties"); try { properties.load(is); } catch (IOException e) { e.printStackTrace(); } driver = properties.getProperty("driver"); url = properties.getProperty("url"); usename = properties.getProperty("usename"); password = properties.getProperty("password"); } //获取数据库的连接 public static Connection getConnection(){ Connection connection = null; try { Class.forName(driver); connection = DriverManager.getConnection(url, usename, password); } catch (Exception e) { e.printStackTrace(); } return connection; } //编写查询公共方法 public static ResultSet execute(Connection connection,String sql,PreparedStatement preparedStatement,Object[] params,ResultSet resultSet) throws SQLException { //预编译的sql在后面直接用就可以，不用再传 preparedStatement = connection.prepareStatement(sql); for (int i = 0; i < params.length; i++) { //setObject占位符从1开始，但是我们的数组是从0开始的 preparedStatement.setObject(i+1,params[i]); } resultSet = preparedStatement.executeQuery(); return resultSet; } //编写增删改查公共方法 public static int execute(Connection connection,String sql,PreparedStatement preparedStatement,Object[] params) throws SQLException { preparedStatement = connection.prepareStatement(sql); for (int i = 0; i < params.length; i++) { preparedStatement.setObject(i+1,params[i]); } int updataRows= preparedStatement.executeUpdate(); return updataRows; } //释放资源 public static boolean closeResource(Connection connection,PreparedStatement preparedStatement,ResultSet resultSet){ boolean flag = true; if (resultSet!=null){ try { resultSet.close(); //GC垃圾回收 resultSet = null; } catch (SQLException throwables) { throwables.printStackTrace(); flag = false; } } if (preparedStatement!=null){ try { preparedStatement.close(); //GC垃圾回收 preparedStatement = null; } catch (SQLException throwables) { throwables.printStackTrace(); flag = false; } } if (connection!=null){ try { connection.close(); //GC垃圾回收 connection = null; } catch (SQLException throwables) { throwables.printStackTrace(); flag = false; } } return flag; } } -
编写字符编码过滤器
package moli.filter; import javax.servlet.*; import java.io.IOException; public class CharacterEncodingFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException {} @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); chain.doFilter(request,response); } @Override public void destroy() {} }<!--字符编码过滤器--> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>moli.filter.CharacterEncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
8.导入静态资源
2.登录功能实现
-
编写前端页面
-
设置首页
在web.xml里
<!--设置欢迎页面--> <welcome-file-list> <welcome-file>login.jsp</welcome-file> </welcome-file-list> -
编写dao层用户登录的接口UserDao
在dao包中建立一个user包，在包中建一个UserDao接口
package moli.dao.user; import moli.pojo.User; import java.sql.Connection; //面向接口编程 public interface UserDao { //得到要登录的用户 public User getUserLogin(Connection connection,String userCode); } -
编写UserDao接口的实现类UserDaoImpl
package moli.dao.user; import moli.dao.BaseDao; import moli.pojo.User; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class UserDaoImpl implements UserDao { @Override public User getUserLogin(Connection connection, String userCode) throws SQLException { PreparedStatement pst=null; ResultSet rs=null; User user=null; if (connection!=null){ String sql="select * from smbms_user where userCode=?"; Object[] params = {userCode}; rs=BaseDao.execute(connection,pst,rs,sql,params); if (rs.next()){ user = new User(); user.setId(rs.getInt("id")); user.setUserCode(rs.getString("userCode")); user.setUserName(rs.getString("userName")); user.setUserPassword(rs.getString("userPassword")); user.setGender(rs.getInt("gender")); user.setBirthday(rs.getDate("birthday")); user.setPhone(rs.getString("phone")); user.setAddress(rs.getString("address")); user.setUserRole(rs.getInt("userRole")); user.setCreatedBy(rs.getInt("createdBy")); user.setCreationDate(rs.getTimestamp("creationDate")); user.setModifyBy(rs.getInt("modifyBy")); user.setModifyDate(rs.getTimestamp("modifyDate")); } BaseDao.closeResource(null,pst,rs); } return user; } } -
编写业务层接口
在service下建立user包，建立UserService接口
package moli.service.user; import moli.pojo.User; public interface UserService { //用户登录 public User login(String userCode,String userPassword); } -
编写业务层接口的实现类
在service的user包中建立UserServiceImpl类
package moli.service.user; import moli.dao.BaseDao; import moli.dao.user.UserDao; import moli.dao.user.UserDaoImpl; import moli.pojo.User; import java.sql.Connection; import java.sql.SQLException; public class UserServiceImpl implements UserService { //业务层都会调用dao层，所以我们要引用dao层 private UserDao userDao; public UserServiceImpl(){ userDao= new UserDaoImpl(); } @Override public User login(String userCode, String userPassword) { Connection connection = null; User user = null; connection = BaseDao.getConnection(); //通过业务层调用具体的数据库操作 try { user = userDao.getUserLogin(connection,userCode); } catch (SQLException throwables) { throwables.printStackTrace(); }finally { BaseDao.closeResource(connection,null,null); } return user; } @Test public void test(){ UserServiceImpl userService = new UserServiceImpl(); User admin = userService.login("admin", "123456"); System.out.println(admin.getUserPassword()); } } -
编写servlet类
在servlet包中创建user包，在user包中建立LoginServlet类
package moli.servlet.user; import moli.pojo.User; import moli.service.user.UserServiceImpl; import moli.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 { //Servlet:控制层，调用业务层代码 @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("LoginServlet---start---"); //获取用户名和密码 String userCode = req.getParameter("userCode"); String userPassword = req.getParameter("userPassword"); //和数据库中的密码进行对比，调用业务层 UserServiceImpl userService = new UserServiceImpl(); User user = userService.login(userCode, userPassword);//这里已经把人给查出来了 if (user!=null){//查有此人,可以登录 //将用户的信息放到Session中 req.getSession().setAttribute(Constants.USER_SESSION,user); //跳转到主业 resp.sendRedirect("jsp/frame.jsp"); }else {//查无此人 //转发回登录页面，顺带提示它，用户名或者密码错误 req.setAttribute("error","用户名或者密码错误"); req.getRequestDispatcher("login.jsp").forward(req,resp); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } }再util包下建立Constants类，存放常量
package moli.util; public class Constants { public final static String USER_SESSION = "userSession"; }注册LoginServlet类
<!--Servlet--> <servlet> <servlet-name>LoginServlet</servlet-name> <servlet-class>moli.servlet.user.LoginServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/login.do</url-pattern> </servlet-mapping> -
测试，确保以上成功
3.登录功能优化
3.1注销功能
思路:移除session，返回登录页面。
在Servlet包的user包中建立LogoutServlett类
public class LogoutServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//移除用户的session
req.getSession().removeAttribute(Constants.USER_SESSION);
resp.sendRedirect("/login.jsp");//返回登录页面
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}
<!--注销-->
<servlet>
<servlet-name>LogoutServlet</servlet-name>
<servlet-class>moli.servlet.user.LogoutServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LogoutServlet</servlet-name>
<url-pattern>/jsp/logout.do</url-pattern>
</servlet-mapping>
或者我们可以设置自动注销
<session-config>
<session-timeout>30</session-timeout>
</session-config>
3.2登录拦截优化
在filter中建立SysFilter类
编写个过滤器并注册
package moli.filter;
import moli.pojo.User;
import moli.util.Constants;
import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class SysFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {}
@Override
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) resp;
//过滤器，从session里获取用户
User user = (User) request.getSession().getAttribute(Constants.USER_SESSION);
if (user==null){//已经移除或者注销了，或者没有登录
response.sendRedirect("/SMBMS/error.jsp");
}else {
chain.doFilter(req,resp);
}
}
@Override
public void destroy() {}
}
<!--用户登录过滤器-->
<filter>
<filter-name>SysFilter</filter-name>
<filter-class>moli.filter.SysFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SysFilter</filter-name>
<url-pattern>/jsp/*</url-pattern>
</filter-mapping>
测试一定要ok才可以！
4.密码修改
4.1导入前端素材
4.2编写dao层
用户修改密码的接口UserDao
//面向接口编程
public interface UserDao {
//修改当前用户密码
public int updatePwd(Connection connection,int id,String password) throws SQLException;
}
UserDao接口实现类UserDaoImpl
//修改当前用户密码
@Override
public int updatePwd(Connection connection, int id, String password) throws SQLException {
System.out.println("UserServiceImpl"+password);
PreparedStatement pst=null;
int execute=0;
if (connection!=null){
String sql = "update smbms_user set userPassword=? where id=?";
Object params[] = {password,id};
execute = BaseDao.execute(connection, pst, sql, params);
BaseDao.closeResource(null,pst,null);
}
return execute;
}
4.3编写业务层service
user包中的UserService接口
public interface UserService {
//根据用户id修改用户密码
public boolean updatePwd(int id, String pwd) ;
}
UserService接口实现类UserServiceImpl
public boolean updatePwd(int id, String pwd) {
System.out.println("UserServiceImpl"+pwd);
Connection connection = null;
boolean flag=false;
try {
connection=BaseDao.getConnection();
if (userDao.updatePwd(connection,id,pwd)>0){
flag=true;
}
} catch (SQLException throwables) {
throwables.printStackTrace();
}finally {
BaseDao.closeResource(connection,null,null);
}
return flag;
}
4.4编写servlet层
在Servlet包中的user包中建立UserServlet类
其中写完代码，修改完密码后再次去数据库查看密码会出现null的情况，就需要我们在各个类添加输出。
记得复用，提取出方法。
public class UserServlet extends HttpServlet {
//servlet复用
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
String method = req.getParameter("method");
if (method.equals("savepwd")&& method!=null){
this.updatePwd(req,resp);
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
public void updatePwd(HttpServletRequest req, HttpServletResponse resp){
//从session里拿到用户ID
Object o = req.getSession().getAttribute(Constants.USER_SESSION);
String newpassword = req.getParameter("newpassword");
System.out.println("UserServlet"+newpassword);
boolean flag=false;
if (o!=null&& !StringUtils.isNullOrEmpty(newpassword)){
UserService userService = new UserServiceImpl();
flag = userService.updatePwd(((User) o).getId(),newpassword);
if (flag){
req.setAttribute("message","修改成功，请退出重新登陆");
//密码修改成功，移除当前session
req.getSession().removeAttribute(Constants.USER_SESSION);
}else {
req.setAttribute("message","密码修改失败");
}
}else {
req.setAttribute("message","密码有问题");
}
try {
req.getRequestDispatcher("pwdmodify.jsp").forward(req,resp);
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
<!--修改密码-->
<servlet>
<servlet-name>UserServlet</servlet-name>
<servlet-class>moli.servlet.user.UserServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UserServlet</servlet-name>
<url-pattern>/jsp/user.do</url-pattern>
</servlet-mapping>
4.5Ajax验证旧密码
阿里巴巴的fastjson
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.62</version>
</dependency>
<!--设置session默认过期时间，真实业务需求-->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
UserServlet
//servlet复用
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
String method = req.getParameter("method");
if (method.equals("savepwd")&& method!=null){
this.updatePwd(req,resp);
}else if (method.equals("pwdmodify")&& method!=null){
this.pwdModify(req,resp);
}
}
//验证旧密码,session中有用户的密码
public void pwdModify(HttpServletRequest req, HttpServletResponse resp){
//从session里拿到用户ID
Object o = req.getSession().getAttribute(Constants.USER_SESSION);
String oldpassword = req.getParameter("oldpassword");
System.out.println(oldpassword);
//万能的Map:结果集
Map<String, String> resultMap = new HashMap<String,String>();
if (o==null){//session失效了、过期了
resultMap.put("result","sessionerror");
}else if (StringUtils.isNullOrEmpty(oldpassword)){
//输入的密码为空
resultMap.put("result","error");
}else {
String userPassword = ((User) o).getUserPassword();
if (oldpassword.equals(userPassword)){
resultMap.put("result","true");
}else {
resultMap.put("result","false");
}
}
try {
resp.setContentType("application/json");
PrintWriter writer = resp.getWriter();
//阿里巴巴的JSON工具类:JSONArray,用来转换格式的
/*
resultMap = ["result","true"]
Json格式 = {key:value}
*/
writer.write(JSONArray.toJSONString(resultMap));
writer.flush();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
5.用户管理实现
思路：
1.导入分页的工具类
oop面向对象三大特性：封装（属性私有，get/set，在set中限定一些不安全的情况），继承，多态。
public class PageSupport {
//当前页码--来自用户输入
private int currentPageNo = 1;
//总数量（表）
private int totalCount = 0;
//页码容量
private int pageSize = 0;
//总页数--totalCount/pageSize(+1)
private int totalPageCount = 1;
public int getCurrentPageNo(){
return currentPageNo;
}
public void setCurrentPageNo(int currentPageNo){
if (currentPageNo > 0) {
this.currentPageNo = currentPageNo;
}
}
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount){
if(totalCount > 0){
this.totalCount = totalCount;
//设置总页数
this.setTotalPageCountRs();
}
}
public int getPageSize(){
return pageSize;
}
public void setPageSize(int pageSize){
if(pageSize > 0){
this.pageSize = pageSize;
}
}
public int getTotalPageCount(){
return totalPageCount;
}
public void setTotalPageCount(int totalPageCount){
this.totalPageCount = totalPageCount;
}
public void setTotalPageCountRs(){
if(this.totalCount % this.pageSize == 0){
this.totalPageCount = this.totalCount / this.pageSize;
}else if (this.totalCount % this.pageSize > 0){
this.totalPageCount = this.totalCount / this.pageSize + 1;
}else {
this.totalPageCount = 0;
}
}
}
2.用户列表页面导入
5.1获取用户数量
5.1.1编写dao层
UserDao添加一个接口
//面向接口编程
public interface UserDao {
//根据用户名或者角色来查询用户数量
public int getUserCount(Connection connection,String username,int useRole) throws SQLException;
}
UserDaoImpl里实现接口
public int getUserCount(Connection connection, String username, int useRole) throws SQLException {
PreparedStatement pst=null;
ResultSet rs = null;
int count = 0;
if (connection!=null){
//拼接sql
StringBuffer sql = new StringBuffer();
sql.append("select count(1) as count from smbms_user as u ,smbms_role as r where u.userRole=r.id");
ArrayList<Object> list = new ArrayList<>();
if (!StringUtils.isNullOrEmpty(username)){
sql.append("and u.userName like ?");
list.add("%"+username+"%");//index:0
}
if (useRole>0){
sql.append("and u.userName like ?");
list.add(useRole);//index:1
}
//把列表转换为数组
Object[] params = list.toArray();
System.out.println(" getUserCount----"+sql.toString());//最后完整的输出我们的sal
rs=BaseDao.execute(connection,pst,rs,sql.toString(),params);
if (rs.next()){
count = rs.getInt("count");//从结果集中获取最终数量
}
BaseDao.closeResource(null,pst,rs);
}
return count;
}
5.1.2编写业务层
service的user包中的UserService添加接口
public interface UserService {
//查询记录数
public int getUserCount(String username, int useRole);
}
UserServiceImpl实现类
public int getUserCount(String username, int useRole) {
Connection connection = null;
int count = 0;
try {
connection = BaseDao.getConnection();
count = userDao.getUserCount(connection,username,useRole);
} catch (SQLException throwables) {
throwables.printStackTrace();
}finally {
BaseDao.closeResource(connection,null,null);
}
return count;
}
@Test
public void test(){
UserServiceImpl userService = new UserServiceImpl();
int userCount = userService.getUserCount(null, 0);
System.out.println(userCount);
}
5.2获取用户列表
5.2.1编写dao层
UserDao添加一个接口
//通过条件查询-userList，多了当前页码和页码容量
public List<User> getUserList(Connection connection, String userName, int userRole, int currentPageNo, int pageSize)throws Exception;
UserDaoImpl里实现接口
public List<User> getUserList(Connection connection, String userName, int userRole, int currentPageNo, int pageSize) throws Exception {
PreparedStatement pstm = null;
ResultSet rs = null;
List<User> userList = new ArrayList<User>();
if(connection != null){
StringBuffer sql = new StringBuffer();
sql.append("select u.*,r.roleName as userRoleName from smbms_user u,smbms_role r where u.userRole = r.id");
List<Object> list = new ArrayList<Object>();
if(!StringUtils.isNullOrEmpty(userName)){
sql.append(" and u.userName like ?");
list.add("%"+userName+"%");
}
if(userRole > 0){
sql.append(" and u.userRole = ?");
list.add(userRole);
}
//分页：LIMIT 起始值下标 页面大小
sql.append(" order by creationDate DESC limit ?,?");
currentPageNo = (currentPageNo-1)*pageSize;
list.add(currentPageNo);
list.add(pageSize);
Object[] params = list.toArray();
System.out.println("getUserList ----> " + sql.toString());
rs = BaseDao.execute(connection, pstm, rs, sql.toString(), params);
while(rs.next()){
User _user = new User();
_user.setId(rs.getInt("id"));
_user.setUserCode(rs.getString("userCode"));
_user.setUserName(rs.getString("userName"));
_user.setGender(rs.getInt("gender"));
_user.setBirthday(rs.getDate("birthday"));
_user.setPhone(rs.getString("phone"));
_user.setUserRole(rs.getInt("userRole"));
_user.setUserRoleName(rs.getString("userRoleName"));
userList.add(_user);
}
BaseDao.closeResource(null, pstm, rs);
}
return userList;
}
5.2.2编写业务层
service的user包中的UserService添加接口
//根据条件查询用户列表
public List<User> getUserList(String queryUserName, int queryUserRole, int currentPageNo, int pageSize);
UserServiceImpl实现类
public List<User> getUserList(String queryUserName, int queryUserRole, int currentPageNo, int pageSize) {
Connection connection = null;
List<User> userList = null;
System.out.println("queryUserName ---- > " + queryUserName);
System.out.println("queryUserRole ---- > " + queryUserRole);
System.out.println("currentPageNo ---- > " + currentPageNo);
System.out.println("pageSize ---- > " + pageSize);
try {
connection = BaseDao.getConnection();
userList = userDao.getUserList(connection, queryUserName,queryUserRole,currentPageNo,pageSize);
} catch (Exception e) {
e.printStackTrace();
}finally{
BaseDao.closeResource(connection, null, null);
}
return userList;
}
5.3获取角色操作
为了我们职责统一，我们可以把我们所建的包和pojo里的类相对应。
5.3.1编写dao层
RoleDao添加一个接口
//面向接口编程
public interface RoleDao {
//获取角色列表
public List<Role> getRoleList(Connection connection) throws SQLException;
}
RoleDaoImpl里实现接口
//获取角色列表
public List<Role> getRoleList(Connection connection) throws SQLException {
PreparedStatement pstm = null;
ResultSet resultSet = null;
ArrayList<Role> roleList = new ArrayList<Role>();
if (connection!=null){
String sql = "select * from smbms_role";
Object[] params = {};
resultSet = BaseDao.execute(connection, pstm, resultSet, sql, params);
while (resultSet.next()){
Role _role = new Role();
_role.setId(resultSet.getInt("id"));
_role.setRoleCode(resultSet.getString("roleCode"));
_role.setRoleName(resultSet.getString("roleName"));
roleList.add(_role);
}
BaseDao.closeResource(null,pstm,resultSet);
}
return roleList;
}
5.3.2编写业务层
service的role包中的RoleService添加接口
public interface RoleService {
//获取角色列表
public List<Role> getRoleList();
}
RoleServiceImpl实现类
package moli.service.role;
import moli.dao.BaseDao;
import moli.dao.role.RoleDao;
import moli.dao.role.RoleDaoImpl;
import moli.pojo.Role;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
public class RoleServiceImpl implements RoleService {
//引入Dao
private RoleDao roleDao;
public RoleServiceImpl() {
roleDao = new RoleDaoImpl();
}
public List<Role> getRoleList() {
Connection connection = null;
List<Role> roleList = null;
try {
connection = BaseDao.getConnection();
roleList = roleDao.getRoleList(connection);
} catch (SQLException e) {
e.printStackTrace();
} finally {
BaseDao.closeResource(connection,null,null);
}
return roleList;
}
@Test
public void test(){
RoleServiceImpl roleService = new RoleServiceImpl();
List<Role> roleList = roleService.getRoleList();
for( Role r:roleList){
System.out.println(r.getRoleName());
}
}
}
5.4用户显示的servlet
对Servlet包中的user包中UserServlet类进行如下添加
//重难点
public void query(HttpServletRequest req, HttpServletResponse resp){
//查询用户列表
//从前端获取数据
String queryUserName = req.getParameter("queryname");
String temp = req.getParameter("queryUserRole");
String pageIndex = req.getParameter("pageIndex");
int queryUserRole =0;
//获取用户列表
UserServiceImpl userService = new UserServiceImpl();
List<User> userList = null;
//第一次走这个请求一定是第一页，而且页面大小是固定的
int pageSize = 5;//可以把这个写到配置文件中去，方便日后修改
int currentPageNo = 1;
if (queryUserName==null){
queryUserName="";
}
if (temp!=null&&!temp.equals("")){
queryUserRole = Integer.parseInt(temp);
}
if (pageIndex!=null){
currentPageNo = Integer.parseInt(pageIndex);
}
//获取用户总数（分页：上一页，下一页）
int totalCount = userService.getUserCount(queryUserName, queryUserRole);
//总页数支持
PageSupport pageSupport = new PageSupport();
pageSupport.setCurrentPageNo(currentPageNo);
pageSupport.setPageSize(pageSize);
pageSupport.setTotalCount(totalCount);
int totalPageCount = pageSupport.getTotalPageCount();
//控制首页和尾页
//如果页面要小于1，那就显示第一页的东西
if (currentPageNo<1){
currentPageNo=1;
}else if (currentPageNo>totalPageCount){
currentPageNo=totalPageCount;
}
//获取用户列表显示
userList = userService.getUserList(queryUserName,queryUserRole,currentPageNo,pageSize);
req.setAttribute("userList",userList);
RoleServiceImpl roleService = new RoleServiceImpl();
List<Role> roleList = roleService.getRoleList();
req.setAttribute("roleList",roleList);
req.setAttribute("totalCount",totalCount);
req.setAttribute("currentPageNo",currentPageNo);
req.setAttribute("totalPageCount",totalPageCount);
req.setAttribute("queryUserName",queryUserName);
req.setAttribute("queryUserRole",queryUserRole);
//返回前端
try {
req.getRequestDispatcher("userlist.jsp").forward(req,resp);
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
总结：
6.junit单元测试
定义：在计算机编程中，单元测试（英语：Unit Testing）又称为模块测试,，是针对程序模块（软件设计的最小单位）来进行正确性检验的测试工作。
依赖：
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>compile</scope>
</dependency>
简单使用：
@test注解只有在方法上有效，只要加了这个注解的方法，就可以直接运行。
另附：小黄鸭调试法！
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