Background management system of e-commerce platform -- > preliminary preparation of the project (demand analysis, system design, environment construction and configuration files)

1 The introduction

Today, with the increasing development of the computer age , Computer technology is rapidly integrating into every field of this society . Since computers have been used in the field of management , The development and application of information system have achieved amazing development , E-commerce also came into being .
With the continuous expansion of e-commerce website , Various information about the backstage management of e-commerce websites has also doubled , Facing the huge amount of information , It is necessary to develop the background management system of e-commerce platform to improve the efficiency of management . This topic starts from the basic principle of design , Through an example of e-commerce —— Analysis of e-commerce platform background management system , Thus, it concretely describes the close combination of e-commerce and background server .
The development of e-commerce platform background management system is based on B/S Pattern , The background to use SSM Integrate , Front end use EasyUI The framework realizes the background management system of e-commerce platform , It is mainly used after the administrator logs in to the system , Product information , Commodity type , Manage order information and customer information .

2 Demand analysis

According to the demand analysis , The administrator has the following functional permissions ：

（1） Commodity management ： Including adding items , The goods are off the shelves , Modify the goods , Query products .
（2） Commodity type management ： Including adding product types , Modify item type .
（3） Order management ： Including creating orders , Query order , Delete order and view order details .
（4） Customer management ： Check with customers , Disable or enable customers

3 The system design

According to the demand analysis , You can get the functional structure diagram of the system , Pictured 3.1 Shown .

3.1 Database design

According to the system requirements , Create name as eshop The database of , establish 8 Data sheets , As shown below .

（1） Customer information sheet user_info, It is used to record the basic information of front desk customers
（2） Administrator information table admin_info, Used to record basic administrator information
（3） Commodity information table type, Used to record various commodity types
（4） Commodity information table product_info, Used to record product information
（5） Order information sheet order_info, It is used to record the main information of the order
（6） Order details order_detail, Used to record order details
（7） System menu functions, Used to record system function information
（8） Permissions on the table powers, Used to record administrator permissions

• Customer information sheet user_info The field description of is shown in table 3-1 Shown .
  
• Administrator information table admin_info The field description of is shown in table 3-2 Shown .
  
• Commodity type table type The field description of is shown in table 3-3 Shown .
  
• Commodity information table product_info The field description of is shown in table 3-4 Shown .
  
• Order information sheet order_info The field description of is shown in table 3-5 Shown .
  
• Order details order_detail The fields of are shown in table 3-6 Shown .
  
• System menu functions The field description of is shown in table 3-7 Shown .
  
• Permissions on the table powers The field description of is shown in table 3-8 Shown .
  
  When creating a data table , You also need to set the association relationship between data tables , Pictured 3.2 Shown .
  

4 Environment setup and configuration file

4.1 Table of contents

4.2 stay pom Add the dependencies used by the project in the file

<dependencies>
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>
  </dependency>

  <!-- Servlet API -->
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>3.0-alpha-1</version>
    <scope>provided</scope>
  </dependency>

  <!-- Spring Web -->
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>5.0.3.RELEASE</version>
  </dependency>

  <!-- Spring SpringMVC -->
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.0.3.RELEASE</version>
  </dependency>

  <!-- Spring JDBC -->
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.0.3.RELEASE</version>
  </dependency>

  <!-- Spring Aspects -->
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
    <version>5.0.3.RELEASE</version>
  </dependency>

  <!-- MyBatis -->
  <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.5</version>
  </dependency>

  <!-- MyBatis Spring -->
  <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.1</version>
  </dependency>

  <!-- C3P0 -->
  <!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
  <dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1.2</version>
  </dependency>

  <!-- MySQL Drive pack  -->
  <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.45</version>
  </dependency>

  <!-- JSTL -->
  <!-- https://mvnrepository.com/artifact/jstl/jstl -->
  <dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple -->
  <dependency>
    <groupId>com.googlecode.json-simple</groupId>
    <artifactId>json-simple</artifactId>
    <version>1.1</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
  <dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.3.3</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
  <dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.2</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
  <dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.7</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.5</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.9.5</version>
  </dependency>

  <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.9.5</version>
  </dependency>

</dependencies>

4.3 Integrate relevant configuration files

1. To write web.xml file

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <!--1、 start-up Spring The container of  -->
  <!-- needed for ContextLoaderListener -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!--  The listener class can receive notification of when the event occurs and what to respond with . This is used to start Spring The configuration file applicationContext.xml　-->
  <!--Bootstraps the root web application context before servlet initialization -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!--2、springmvc Front end controller for , Intercept all requests , Will automatically read dispatcherServlet-servlet.xml, If the controller configuration file uses a different name , Use init-param Statement -->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--<init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param>-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <!-- Map all requests to the DispatcherServlet for handling -->
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- 3、 Character encoding filter , Be sure to put it in front of all filters  -->
  <filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceRequestEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>forceResponseEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>


  <!-- 4、 Use Rest Style URI, Make the page plain post Request to be converted to specified delete perhaps put request  -->
  <filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter>
    <filter-name>HttpPutFormContentFilter</filter-name>
    <filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>HttpPutFormContentFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

2. To write SpringMVC The configuration file /ssm/src/main/webapp/WEB-INF/dispatcherServlet-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    
    <!-- Start the scanner function -->
    <context:component-scan base-package="com.hcz" use-default-filters="false">
    <!-- Just scan the controller -->
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!-- Trying to configure parser -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- Two standard configurations -->
    <mvc:default-servlet-handler/>
    <mvc:annotation-driven/>

    <!-- Upload files -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--  The maximum size of the uploaded file is 10MB -->
        <property name="maxUploadSize" value="10485760"/>
        <!--  Character encoding  -->
        <property name="defaultEncoding" value="UTF-8"/>
    </bean>
</beans>

3. To write Spring The configuration file /ssm/src/main/resources/applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">


    <!-- Auto scan package , Start with @Component,@Repository,@Service Scanning of annotated classes , But with @Controller Annotated classes are not scanned -->
    <context:component-scan base-package="com.hcz">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>


    <!--Spring Configuration file for , The main configuration here is related to business logic -->
    <!-- data source -->
    <context:property-placeholder location="classpath:dbconfig.properties"/>
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"/>
        <property name="driverClass" value="${jdbc.driverClass}"/>
        <property name="user" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!-- To configure SqlSessionFactoryBean-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--set Inject , Pay the database connection pool dataSource attribute -->
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- register Mapper Scanner -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- Appoint SqlSessionFactory Object's id-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        <!-- Specify package name ,  The name of the bag is dao The package name of the interface -->
        <property name="basePackage" value="com.hcz.dao"/>
    </bean>

    <!-- To configure DataSourceTransactionManager（ Business management ）-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- Start the annotation based declarative transaction manager -->
    <tx:annotation-driven transaction-manager="transactionManager"/>

</beans>

4. Create database connection information property file dbconfig.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3366/eshop?useUnicode=true&characterEncoding=utf-8
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=123456

4.4 Create entity class

stay src/main/java Under the table of contents , Create a new one com.hcz.pojo package , It stores entity class objects , Here the entity class object set、get Methods omit and do not write .

1. establish UserInfo Entity class object

/** *  User information object  */
public class UserInfo {
    
    private int id;
    private String userName;
    private String password;
    private String realName;
    private String sex;
    private String address;
    private String email;
    private String regDate;
    private int status;

2. establish AdminInfo Entity class object

public class AdminInfo {
    
    private int id;
    private String name;
    private String pwd;

    // Association attribute 
    private List<Function> fs;

3. establish Function Entity class object

public class Function implements Comparable<Function>{
    

    private int id;
    private String name;
    private int parentid;
    private boolean isleaf;
    // Association attribute 
     private Set ais = new HashSet();

    // Compare 2 individual ID, Return... When the same 0, Otherwise return to non 0 Count 
    @Override
    public int compareTo(Function o) {
    
        // Compare the two id value , Same back 0, Otherwise, it returns nonzero 
        return ((Integer)this.getId()).compareTo((Integer)(o.getId()));
    }

4. establish ProductInfo Entity class object

/** *  Commodity information : */
public class ProductInfo {
    
    private int id;// Product id 
    private String code;// Commodity code 
    private String name;// Name of commodity 
    // Association attribute   Commodity type 
    private Type type;

    private String brand;// Brand of goods 
    private String pic;// A little picture of commodities 
    private int num;// The number 
    private double price;// commodity price 
    private String intro; //  Product introduction 【 This attribute was omitted before, which led to a long search for errors 】
    private int status;// Goods state 
    private double priceFrom;
    private double priceTo;

5. establish Pager Entity class object

/** *  Paging display class  */
public class Pager {
    
    private int curPage;// The current page 
    private int perPageRows;// Number of row records displayed per page 
    private int rowCount;// Record the total number 
    private int pageCount;// Total number of pages 

6. establish TreeNode Entity class object

public class TreeNode {
    
    private int id;// node 
    private String text;// The name of the node 
    private int fid;// Parent node 
    private List<TreeNode> children;// Included child nodes 

7. establish Type Entity class object

/** *  Commodity type  */
public class Type {
    
    private int id;// Product type number 
    private String name;// Product type name 

8. establish OrderInfo Entity class object

/** *  Order information entity class  */
public class OrderInfo {
    
    private Integer id;
    private int uid;// Customer id
    private UserInfo ui;// User information object 
    private String status;// The order status 
    private String ordertime;// Order time 
    private double orderprice;// Order amount 
    private String orderTimeFrom;// Order start time for query 
    private String orderTimeTo;// Order end time for query 

9. establish OrderDetail Entity class object

/** *  Order details  */
public class OrderDetail {
    
    private int id;
    private int oid;// Order id
    private OrderInfo oi;// Order information object 
    private int pid;// goods id
    private ProductInfo pi;// Commodity information objects 
    private int num;// Purchase quantity 
    private double price;// item pricing 
    private double totalprice;// Subtotal of amount ： Quantity times unit price 

4.5 Create a tool class JsonFactory

stay src/main/java Under the table of contents , Create a new one com.hcz.util package , It stores tool class objects

public class JsonFactory {
    
    public static List<TreeNode> buildTree(List<TreeNode> nodes,int id){
    
        List<TreeNode>  treeNodes = new ArrayList<>();
        for (TreeNode treeNode:nodes){
    
            TreeNode node = new TreeNode();
            node.setId(treeNode.getId());
            node.setText(treeNode.getText());
            if (id == treeNode.getFid()){
    
                // call buildTree Methods TreeNode Medium children Attribute assignment 
                node.setChildren(buildTree(nodes,node.getId()));
                treeNodes.add(node);
            }
        }
        return treeNodes;
    }
}