校园电商项目2(基于SSM)——模块设计

步骤一：各模块职责

步骤二：实体类设计

　　

package com.figsprite.o2o.bean;
 
import java.util.Date;
 
public class Area {
 
	private Integer areaId;
	private String areaName;
	private Integer priority;
 
	private Date createTime;
	private Date lastEditTime;
 
	public Integer getAreaId() {
		return areaId;
	}
	public void setAreaId(Integer areaId) {
		this.areaId = areaId;
	}
	public String getAreaName() {
		return areaName;
	}
	public void setAreaName(String areaName) {
		this.areaName = areaName;
	}
	public Integer getPriority() {
		return priority;
	}
	public void setPriority(Integer priority) {
		this.priority = priority;
	}
	public Date getCreateTime() {
		return createTime;
	}
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
	public Date getLastEditTime() {
		return lastEditTime;
	}
	public void setLastEditTime(Date lastEditTime) {
		this.lastEditTime = lastEditTime;
	}
 
}

　　接下来创建数据库

　　

　　接着按照上面的javabean，添加列

　　

package com.figsprite.o2o.bean;
 
import java.util.Date;
 
public class PersonInfo {
	private Long userId;
	private String name;
	private String profileImg;
 
	private String email;
	private String gender;
	private Integer enableStatus;
 
	//1.顾客 2.店家 3.超级管理员
	private Integer userType;
	private Date createTime;
	private Date lastEditTime;
 
	public Long getUserId() {
		return userId;
	}
	public void setUserId(Long userId) {
		this.userId = userId;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getProfileImg() {
		return profileImg;
	}
	public void setProfileImg(String profileImg) {
		this.profileImg = profileImg;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public String getGender() {
		return gender;
	}
	public void setGender(String gender) {
		this.gender = gender;
	}
	public Integer getEnableStatus() {
		return enableStatus;
	}
	public void setEnableStatus(Integer enableStatus) {
		this.enableStatus = enableStatus;
	}
	public Integer getUserType() {
		return userType;
	}
	public void setUserType(Integer userType) {
		this.userType = userType;
	}
	public Date getCreateTime() {
		return createTime;
	}
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
	public Date getLastEditTime() {
		return lastEditTime;
	}
	public void setLastEditTime(Date lastEditTime) {
		this.lastEditTime = lastEditTime;
	}
 
}

　　

USE school_o2o;
CREATE TABLE `tb_person_info`(
	`user_id` INT(10) NOT NULL AUTO_INCREMENT,
	`name` VARCHAR(32) DEFAULT NULL,
	`profile_img` VARCHAR(1024) DEFAULT NULL,
	`email` VARCHAR(1024) DEFAULT NULL,
	`gender` VARCHAR(2) DEFAULT NULL,
	`enable_status` INT(2) NOT NULL DEFAULT 0,
	`user_type` INT(2) NOT NULL DEFAULT 1 ,
	`create_time` DATETIME DEFAULT NULL,
	`last_edit_time` DATETIME DEFAULT NULL,
	PRIMARY KEY(`user_id`)
)ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET = utf8

　　在这里，简单介绍一下MYSQL的两个常用引擎的区别：

　　　　( • ̀ω•́ )✧

　　　　MyISAM只支持表级锁，什么是表级锁呢？比如如果一个线程要更改第二行记录，那么另外一个线程想更改第三行记录，但是因为MyISAM是表级锁，所以后面那个线程只好在哪里静静等待，不过MyISAM的读能力很强，因为它是基于权标扫描，然而InnoDB是行级锁，也就是小A同学在改第一行的时候，小B同学可以同时改第三行(反正不要再改第一行都OK)，

　　　　总之，InnoDB在写的方面略强于MyISAM，然而在读方面MyISAM远强于InnoDB， 但InnoDB支持事务控制，因此如果读的操作比较多建议使用MyISAM

package com.figsprite.o2o.bean;
 
import java.util.Date;
 
public class WechatAuth {
	private Long wechatAuthId;
	private String openId;
	private Date createTime;
 
	private PersonInfo personInfo;
 
	public Long getWechatAuthId() {
		return wechatAuthId;
	}
 
	public void setWechatAuthId(Long wechatAuthId) {
		this.wechatAuthId = wechatAuthId;
	}
 
	public String getOpenId() {
		return openId;
	}
 
	public void setOpenId(String openId) {
		this.openId = openId;
	}
 
	public Date getCreateTime() {
		return createTime;
	}
 
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
 
	public PersonInfo getPersonInfo() {
		return personInfo;
	}
 
	public void setPersonInfo(PersonInfo personInfo) {
		this.personInfo = personInfo;
	}
 
}

　　这里用户ID相对于该表是个外键，所以在JavaBean里我们通过一个对象引用的方式表示外键

　　

package com.figsprite.o2o.bean;
 
import java.util.Date;
 
public class LocalAuth {
	private Long localAuthId;
	private String username;
	private String password;
 
	private Date createTime;
	private Date lastEditTime;
	private PersonInfo personInfo;
 
	public Long getLocalAuthId() {
		return localAuthId;
	}
	public void setLocalAuthId(Long localAuthId) {
		this.localAuthId = localAuthId;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public Date getCreateTime() {
		return createTime;
	}
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
	public Date getLastEditTime() {
		return lastEditTime;
	}
	public void setLastEditTime(Date lastEditTime) {
		this.lastEditTime = lastEditTime;
	}
	public PersonInfo getPersonInfo() {
		return personInfo;
	}
	public void setPersonInfo(PersonInfo personInfo) {
		this.personInfo = personInfo;
	}
 
}

　　

USE school_o2o;
CREATE TABLE `tb_wechat_auth`(
	`wechat_auth_id` INT(10) NOT NULL AUTO_INCREMENT,
	`open_id` VARCHAR(1024) NOT NULL,
	`create_time` DATETIME DEFAULT NULL,
	`user_id` INT(10) NOT NULL,
	PRIMARY KEY(`wechat_auth_id`),
	CONSTRAINT `fk_wechatauth_profile` FOREIGN KEY(`user_id`) REFERENCES `tb_person_info`(`user_id`)
)ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET = utf8

　　

USE school_o2o;
CREATE TABLE `tb_local_auth`(
	`local_auth_id` INT(10) NOT NULL AUTO_INCREMENT,
	`username` VARCHAR(128) NOT NULL,
	`password` VARCHAR(128) NOT NULL,
	`create_time` DATETIME NOT NULL,
	`last_edit_time` DATETIME NOT NULL,
	`user_id` INT(10) NOT NULL,
	PRIMARY KEY(`local_auth_id`),
	UNIQUE KEY `uk_local_profile`(`username`),
	CONSTRAINT `fk_localauth_profile` FOREIGN KEY(`user_id`) REFERENCES `tb_person_info`(`user_id`)
)ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET = utf8

　　这里我们要对微信信息表追加一个唯一索引，也就是对open_id属性，首先在业务方面来讲，open_id必须唯一,从性能上讲，我们后面会依据open_id来检索微信信息表的内容，设置唯一索引可以提升查询性能。

ALTER TABLE tb_wechat_auth ADD UNIQUE INDEX(open_id);

　　这里报了1071错误，

这里是因为我们对长度为1024的open_id建立索引，mysql默认情况下单个列的索引不能超过767字节，所以这里我们有两种解决方法，第一种，直接改掉数据库配置，当然这样会造成性能损失，所以建议，还是把原先的表改掉

ALTER TABLE `tb_wechat_auth` MODIFY `open_id` VARCHAR(100) NOT NULL;

　　

　　　

　　商品类别bean:

        private Long productCategoryId;
	private Long shopId;
	private String productCategoryName;
 
	private Integer priority;
	private Date createTime;

　　

步骤三：关联总结