SMBMS 三层架构的简单案例 （超市订单管理系统）

14.SSM框架 SMBMS

MVC三层架构

SMBMS基础登录演示

1.搭建一个mawen-web项目

2.测试Tomcat是否正常运行

配置最新的web.xml配置 否则可能css样式不能呈现

3.导入对应的jar包

  <dependencies>
    <dependency>
      <!-- 单元测试  可能会产生test标签 删除即可-->
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>

    <dependency>
      <!-- Jsp依赖-->
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.3</version>
      <scope>provided</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    <dependency>
      <!-- Servlet依赖-->
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
      <scope>provided</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/taglibs/standard -->
    <dependency>
      <!-- Standard标签库-->
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl-api -->
    <dependency>
      <!-- Jstl表达式依赖-->
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl-api</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <!-- Java连接数据库-->
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.47</version>
    </dependency>
  </dependencies>

4.编写实体类

Bill Provider Role User用户类 对应Smbms数据库的表单 表类映射

1.Bill

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

public class Bill {
    private Integer id;
    private String billCode;//账单编码
    private String productName;//商品全名
    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 modifyDate;//更新时间
    private String providerName;//供应商名称

    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 getModifyDate() {
        return modifyDate;
    }

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

    public String getProviderName() {
        return providerName;
    }

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

2.Provide

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 getProAdress() {
        return proAddress;
    }

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

    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;
    }
}

3.Role

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;
    }
}

4.User

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; //用户生日
    private String phone;//用户电话
    private String address;//用户地址
    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;//用户年龄
    private String userRolename;  //用户角色名称


    public Integer getId(int id) {
        return this.id;
    }

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

    public String getUserCode(String userCode)  {
        return this.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;
    }

    public Integer getAge() {
        Date date=new Date();
        Integer i = 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;
    }
} 

5.数据库SMBMS

• 自己直接在数据库里面输入生成

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);

6.编写Properties Sql文件

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/smbms?useSSL=false&useUnicode=true&characterEncoding=utf-8
username=root
password=root

7.编写Dao 操作数据库

1.类加载器读写Propert资源

2…连接数据库

3.编写查询公共类

4.编写增删改公共类

5.释放资源

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 String driver;
    private static String url;
    private static String username;
    private static String password;

    static {
        Properties properties = new Properties();
        //通过类加载器读取对应的资源
        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");
        username=properties.getProperty("username");
        password=properties.getProperty("password");
    }
//获得数据库连接
    public static Connection getConnection(){
        Connection connection =null;
        try{
            Class.forName(driver);
            connection = DriverManager.getConnection(url,username,password);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return connection;
    }


    //编写查询公共类
    public static ResultSet execute(Connection connection,PreparedStatement preparedStatement, ResultSet resultSet,String sql ,Object[] params) throws SQLException {
         preparedStatement = connection.prepareStatement(sql);
        for (int i=0;i<params.length;i++){
            //setObject  占位符是从1开始 我们是0
            preparedStatement.setObject(i+1,params[i]);

        }
        resultSet=preparedStatement.executeQuery();
        return  resultSet;
    }


//编写增删改公共类
    public static int execute(Connection connection,  PreparedStatement preparedStatement,String sql , Object[] params) throws SQLException {
        //预编译
        preparedStatement = connection.prepareStatement(sql);
        //赋值操作
        for (int i=0;i<params.length;i++){
            //setObject 占位符是从1开始 我们是0
            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
                resultSet=null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag=false;
            }
        }
        if(preparedStatement!=null){
            try{
                preparedStatement.close();
                //GC回收
                preparedStatement=null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag=false;
            }
        }

        if(connection!=null){
            try{
                connection.close();
                //GC回收
                connection=null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag=false;
            }
        }
        return  flag;

    }

}

7.编写Filter过滤

中文编码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 servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
         servletRequest.setCharacterEncoding("utf-8");
         servletResponse.setCharacterEncoding("utf-8");
         filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {

    }
}

xml

  
    CharacterEncodingFilter
    com.ws.filter.CharacterEncodingFilter
  
  
    CharacterEncodingFilter
    /*
  

8.导入静态资源 Jsp和Css

1.直接导入到web下面 这里提供了jsp和css 不用自己写代码

**这里注意的是Css格式可能不会出来 可能是因为Xml不是最新配置 **

2.设置首登录页面

  
  <welcome-file-list>
    <welcome-file>login.jspwelcome-file>
  welcome-file-list>
web-app>

9.Dao接口对应,实现类

1.获得数据库连接和用户信息的接口

import com.ws.pojo.User;

import java.sql.Connection;
import java.sql.SQLException;

//面向接口编程
public interface UserDao {
    //得到登录的用户  需要数据库连接对象  UserCode值
    public User getLoginUser(Connection connection,String userCode) throws SQLException;

}

2.Dao接口实现类

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class UserDaoImpl implements UserDao{
//
    public User getLoginUser(Connection connection, String userCode) throws SQLException {
        PreparedStatement pstm=null;
        ResultSet rs=null;
        User user=null;

        if(connection!=null) {
            //通过这个名字查询到这个sql
            String sql = "select* from smbms_user where userCode=?";
            Object[] params = {userCode};

            //预编译查询操作
                    rs = BaseDao.execute(connection,pstm, rs, sql, params);

            if(rs.next()){
                        //封装到用户
                        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.getDate("modifyDate"));
                    }
                    BaseDao.closeResource(null,pstm,rs);
        }
        return user;
    }
}

10.用户登录接口 实现类

1.登录接口

userCode 和UserPassword 看看是否对应数据库和接口

import com.ws.pojo.User;

public interface UserService {
    //用户登录
    public User login(String userCode,String userPassword);
}

2.实现类

**可以用Test注释进行测试操作 可以排除很多错误 **

空指针错误 sql对应失败 数据库 看看Properties的资源有没有写错 数据库连接有没有失败等 还有数据库表对应都是易错点

import com.ws.dao.BaseDao;
import com.ws.dao.user.UserDao;
import com.ws.dao.user.UserDaoImpl;
import com.ws.pojo.User;
import org.junit.Test;

import java.sql.Connection;
import java.sql.SQLException;

public class UserServiceImpl implements UserService{

    //业务层需要调用Dao层  所以我们要引入Dao层
    private UserDao userDao;

    public UserServiceImpl(){
        userDao=new UserDaoImpl();
    }

    public User login(String userCode, String userPassword) {

        Connection connection=null;
        User user=null;

        try {
            //调用连接数据库
            connection= BaseDao.getConnection();
            //业务层调用对应具体的数据库操作
            user = userDao.getLoginUser(connection, userCode);
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            //调用关闭类
            BaseDao.closeResource(connection,null,null);
        }
        return user;
    }
//    @Test
//    public  void test(){
//
//        UserServiceImpl userService = new UserServiceImpl();
//        User admin = userService.login("admin", "1234567");
//        System.out.println(admin.getUserPassword());
//
//    }

}

11.用户登录Servlet

一定看清楚你的数据库的用户id和密码id是什么 对应关系才是最重要的 否则也是会爆出空指针异常

import com.ws.pojo.User;
import com.ws.service.user.UserServiceImpl;
import com.ws.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 LoginServet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //控制层 调用业务层代码
        System.out.println("LoginServlet--Start");

        //获得用户名和密码
        String userCode = req.getParameter("userCode");
        String userPassword = req.getParameter("userPassword");

        //和数据库中的对比
        UserServiceImpl userService = new UserServiceImpl();
        User user = userService.login(userCode, userPassword);
        if(user!=null){//不为空 可以登录
            req.getSession().setAttribute(Constants.USER_SESSION,user);
            //跳转
            resp.sendRedirect("jsp/frame.jsp");
        }else {//转发回去 提示密码或者用户名错误
            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);
    }
}

配置Xml

 
  <servlet>
    <servlet-name>LoginServletservlet-name>
    <servlet-class>com.ws.servlet.user.LoginServetservlet-class>
  servlet>
  <servlet-mapping>
    <servlet-name>LoginServletservlet-name>
    <url-pattern>/login.dourl-pattern>
  servlet-mapping>
  

12.登录注销完善

移除用户的Session记录

mport com.ws.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 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(req.getContextPath()+"/login.jsp");
    }

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

配置xml

  
  <servlet>
    <servlet-name>LogoutServletservlet-name>
    <servlet-class>com.ws.servlet.user.LogoutServletservlet-class>
  servlet>
  <servlet-mapping>
    <servlet-name>LogoutServletservlet-name>
    <url-pattern>/jsp/logout.dourl-pattern>
  servlet-mapping>

13.过滤登录进入页面

import com.ws.pojo.User;
import com.ws.util.Constants;

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

import static com.ws.util.Constants.USER_SESSION;

public class SysFilter implements Filter{
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest req = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //从Session获得用户
        User user = (User) req.getSession().getAttribute(USER_SESSION);
        if(user==null){
            response.sendRedirect("/error.jsp");
        }

        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {

    }
}

配置xml

进入jsp文件的页面都过滤 无法直接跳过登录直接进入

  <filter>
    <filter-name>SysFilterfilter-name>
    <filter-class>com.ws.filter.SysFilterfilter-class>
  filter>
  <filter-mapping>
    <filter-name>SysFilterfilter-name>
    <url-pattern>/jsp/*url-pattern>
  filter-mapping>

14.修改登录密码

UserDao层

 public int updatePwd(Connection connection,int id,String password) throws SQLException;

继承接口

 //修改用户密码
    public int updatePwd(Connection connection,int id,String password) throws SQLException {
        PreparedStatement pstm = null;
        int execute = 0;
        if (connection != null) {
            String sql = "update smbms_user set userPassword =? where id=?";
            Object params[] = {password,id};
            execute = BaseDao.execute(connection, pstm, sql, params);
            BaseDao.closeResource(null, pstm, null);

        }
        return execute;
    }

业务层

   //根据用户修改密码
    public boolean updatePwd(int id, String pwd);

继承接口

    public boolean updatePwd(int id, String  pwd){
        Connection connection=null;
        boolean flag=false;
        try{
            connection=BaseDao.getConnection();
            if(userDao.updatePwd(connection,id,pwd)>0){
                flag=true;
            }
        }catch (SQLException e){
            e.printStackTrace();
        }finally {
            BaseDao.closeResource(connection,null,null);
        }
        return flag;

UserServlert 层

import com.mysql.jdbc.StringUtils;
import com.ws.pojo.User;
import com.ws.service.user.UserService;
import com.ws.service.user.UserServiceImpl;
import com.ws.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 UserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //从Session拿到Id
        Object o = req.getSession().getAttribute(Constants.USER_SESSION);
        String newpassword = req.getParameter("newpassword");

        boolean flag=false;

        if(o!=null&&!StringUtils.isNullOrEmpty(newpassword)){
            UserServiceImpl userService = new UserServiceImpl();
            //判断flag为真
            flag=userService.updatePwd(((User)o).getId(),newpassword);
            if(flag){
                req.setAttribute("message","密码修改正确");
                //修改成功，移除当前Session
                req.getSession().removeAttribute(Constants.USER_SESSION);
                resp.sendRedirect(req.getContextPath()+"/login.jsp");
            }else {
                req.setAttribute("message","密码错误");
            }
        }else {
            req.getRequestDispatcher("/jsp/pwdmodify.jsp").forward(req,resp);
        }
    }

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

配置Xml ** userServlet对应jsp里面的user.do响应**

  <servlet>
    <servlet-name>UserServletservlet-name>
    <servlet-class>com.ws.servlet.user.UserServletservlet-class>
  servlet>
  <servlet-mapping>
    <servlet-name>UserServletservlet-name>
    <url-pattern>/jsp/user.dourl-pattern>
  servlet-mapping>
  

通过jsp输入获得的数值传输到UserServlet层，然后调用业务层的对比用户信息和Dao层的数据库连接和修改数据，js进行对比，最后提交更新。

15.Servlet复用

在修改密码的阶段和验证旧密码适用

1.将UserServlet的doGet方法中的代码修改成

    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);
        }

2.创建一个新的修改密码类

 //修改密码
    public void updatePwd(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        //从Session拿到Id
        Object o = req.getSession().getAttribute(Constants.USER_SESSION);
        String newpassword = req.getParameter("newpassword");

        boolean flag=false;

        if(o!=null&&!StringUtils.isNullOrEmpty(newpassword)){
            UserServiceImpl userService = new UserServiceImpl();
            //判断flag为真
            flag=userService.updatePwd(((User)o).getId(),newpassword);
            if(flag){
                req.setAttribute("message","密码修改正确");
                //修改成功，移除当前Session
                req.getSession().removeAttribute(Constants.USER_SESSION);
                resp.sendRedirect(req.getContextPath()+"/login.jsp");
            }else {
                req.setAttribute("message","密码错误");
            }
        }else {
            try {
                req.getRequestDispatcher("/jsp/pwdmodify.jsp").forward(req,resp);
            } catch (ServletException e) {
                e.printStackTrace();
            }
        }

    }

16.验证旧密码

** 通过用户登录的Session 进行旧密码的验证**

---

//验证旧密码  Session中的密码
    public void pwdModify(HttpServletRequest req, HttpServletResponse resp){
        //获取Session
        Object o = req.getSession().getAttribute(Constants.USER_SESSION);
        //获取输入的旧密码
        String oldpassword = req.getParameter("oldpassword");
        //万能的Map:结果集
        Map<String, String> resultMap = new HashMap<String,String>();

        if(o==null){//Session失效了

           //返回 jsp页面Session失效，需要重新登录输入密码
            resultMap.put("result","sessionerror");

        }else if(StringUtils.isNullOrEmpty(oldpassword)){
            //输入的密码为空
            resultMap.put("result","error");
        }else {
            //对比输入的密码和旧密码
            String userPassword = ((User) o).getUserPassword();
            if(oldpassword.equals(userPassword)){
                //相同的话返回true
                resultMap.put("result","true");
            }else {
                //不一样返回error
                resultMap.put("result","false");
            }
        }


        try {
            将json转变成
            resp.setContentType("application/json");
            PrintWriter writer = resp.getWriter();
            writer.write(JSONArray.toJSONString(resultMap));
            writer.flush();
            writer.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

设置Session的失效时间

 
  <session-config>
    <session-timeout>30session-timeout>
  session-config>

web-app>

导入ajax.js(需要重新学习Css和js)

17.用户管理

1.获取用户数量

UserDao

//查询用户数量  根据用户名或者角色查询
    public int getUserCount(Connection connection,String username ,int userRole) throws SQLException;

UserDaoImpl

  @Override
    public int getUserCount(Connection connection, String username, int userRole) throws SQLException {


        PreparedStatement pstm=null;
        ResultSet rs=null;
        int count=0;

        if(connection!=null){
            StringBuffer sql = new StringBuffer();
            sql.append("select count(1) as count from smbms_user u,smbms_role r where u.userRole=r.id");
            ArrayList<Object> list = new ArrayList<Object>();//存放参数


            if(!StringUtils.isNullOrEmpty(username)){
                sql.append(" and u.userName like ?");
                list.add("%"+username+"%");//index 0
            }

            if(userRole>0){
                sql.append(" and u.userRole=?");
                list.add(userRole);//index 1
            }
            //怎么把list转换成数组
            Object[] params = list.toArray();
            System.out.println("USerDaoImpl->getUserCount"+sql.toString());//输出sql

             rs = BaseDao.execute(connection,pstm,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,pstm,rs);

        }
        return count;


    }

UserService

    //获取用户的数量
    public int getUserCount(String username,int userRole);

UserServiceImpl

  //查询记录数量
    @Override
    public int getUserCount(String username, int userRole) {
        Connection connection=null;
        int count=0;
        try {
            connection = BaseDao.getConnection();
            //获得数量
            count=userDao.getUserCount(connection,username,userRole);
            //返回前端


        } catch (SQLException e) {
            e.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);
    }

2.获取用户列表

userDao

 //用过用户查询获取用户列表
    public List<User> getUserList(Connection connection,String userName ,int userRole,int currentPageNo,int pageSize )throws SQLException;

userDaoImpl

 //查询分页表单和分页数量管理
    @Override
    public List<User> getUserList(Connection connection, String userName, int userRole, int currentPageNo, int pageSize)throws SQLException {

        PreparedStatement pstm=null;
        ResultSet rs=null;
        ArrayList<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");
            ArrayList<Object> list = new ArrayList<Object>();//存放参数


            if(!StringUtils.isNullOrEmpty(userName)){
                sql.append(" and u.userName like ?");
                list.add("%"+userName+"%");//index 0
            }

            if(userRole>0){
                sql.append(" and u.userRole=?");
                list.add(userRole);//index 1
            }
            //分页
            //在数据库中使用 limit startIndex,pageSize; 总数
            //当前页 (当前页面-1)*页面大小
            //0，5         1 0  01234
            //5，10        2 5  56789
            //10，5        3 10

            sql.append("order by createionDate DESC limit ?,?");
            currentPageNo=(currentPageNo-1)*pageSize;
            list.add(currentPageNo);
            list.add(pageSize);

            Object[] params = list.toArray();
            System.out.println("sql------->"+sql.toString());
            rs = BaseDao.execute(connection, pstm, rs,sql.toString(), params);
            while (rs.next()){
                //封装到用户
                 User _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.setUserRolename(rs.getString("userRoleName"));
                userList.add(_user);

            }
            BaseDao.closeResource(null,pstm,rs);

            }
        return userList;
        }

userService

  //分页查询表单和分页管理   //根据条件查询用户列表
    public List<User> getUserList(String queryUserName,int queryUserRole ,int currentPageNo,int pageSize);

userServiceImpl

 @Override
    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("currentPage----->"+currentPageNo);
        System.out.println("pageSize----->"+pageSize);
        try{
            connection=BaseDao.getConnection();
            //调用获取表单
            userList = userDao.getUserList(connection, queryUserName, queryUserRole, currentPageNo, pageSize);
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            BaseDao.closeResource(connection,null,null);
        }

        return  userList;
    }

18.获得角色列表

为了方便管理把Role分了一个单独的组别

RoleDao

  //获取角色列表
    public List<Role> getRoleList(Connection connection)throws SQLException;

RoleDaoImpl

  @Override
    public List<Role> getRoleList(Connection connection) throws SQLException {

            PreparedStatement pstm=null;
            ResultSet resultSet=null;
            ArrayList<Role> roleList = new ArrayList<>();

            if(connection!=null){
                String sql="select *from smbms_role";
                Object[] params={};
                ResultSet execute = 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;

    }

RoleService

public List<Role> getRoleList();

RoleServiceImpl

//引入Dao
private RoleDao roleDao;
public RoleServiceImpl() {
    roleDao = new RoleDaoImpl();
}

@Override
public List<Role> getRoleList() {
    Connection connection=null;
    List<Role> roleList=null;
    connection= BaseDao.getConnection();
    try {
         roleList = roleDao.getRoleList(connection);
    } catch (SQLException e) {
        e.printStackTrace();
    }finally {
        BaseDao.closeResource(connection,null,null);
    }
    return roleList;
}

创建Servlet

分页计算 总页计算

//重点
    //query
    public void query(HttpServletRequest req, HttpServletResponse resp){
        //查询用户列表
        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 页面大小固定
        int pageSize=   5;
        int currentPageNo=1;



        if(queryUserName==null){
            queryUserName="";
        }
        if(temp!=null && !temp.equals("")){
            queryUserRole=Integer.parseInt(temp);//给查询赋值
        }
        if(pageIndex!=null){
            currentPageNo = Integer.parseInt(pageIndex);
        }

        //获得总数(分页  )
        int totalCount = userService.getUserCount(queryUserName, queryUserRole);
        //总页数支持
        PageSupport pageSupport = new PageSupport();
        pageSupport.setCurrentPageNo(currentPageNo);
        pageSupport.setPageSize(pageSize);
        pageSupport.setTotalPageCount(totalCount);


        int totalPageCount = ((int)(totalCount/pageSize))+1;  //总共的页数

        //控制首页尾页
        //如果页面小于1  就显示第一页的东西
        if(currentPageNo<1){
            currentPageNo=1;
        }else if(currentPageNo>totalPageCount){//当页面大于最后一页
            currentPageNo=totalPageCount;
        }



        //获取用户列表
        userList = userService.getUserList(queryUserName, queryUserRole, currentPageNo, pageSize);
        req.setAttribute("userList",userList);

        //角色列表   输入信息给前端
        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();
        }


    }

19.来源

1.狂神视频学习
2.如果错误请指出改正
3.本人刚刚入门有些知识不是很专业望理解