前言

采用SSM整合开发一个web系统是这学期web期末项目考核，前前后后花了八九天的时间，一个bug能玩一天，真是令人焦头烂额，著此博客复盘记录，颗粒入仓。写得不好有错请指出

主要功能

用户的登录，注册和注销
修改个人资料，查看/查找商品
写留言和回复，查自己的留言，删除自己的留言和回复
管理员对商品的增删改查以及批量删除
防盗链，分页，时间显示等 ~~商品方面目前要求只是增删改查，扩展的订单购买退货等未开发。~~

数据库设计

product表，描述商品相关信息，主键pid，包含名字，品牌价格等。
user表，用户存储相关信息，主键uid，包含账密，邮箱，和权限(管理员，普通用户)
message表，留言表相关，主键mid，包含标题，内容，时间等，对应外键uid和pid，即某用户关于某商品的留言。
revert表，回复相关表，包含回复内容等，对应外键uid和mid，即某用户对某条留言的回复。

关于级联删除使用references…cascade语句实现，级联更新采用触发器，例在新增回复后更新留言表的回复数字段。

整体架构

采用Spring+SpringMVC+Mybatis整合开发，分享一个B站教程。

前端界面发送一个ajax请求到服务器tomcat
SpringMVC前端控制器拦截请求，基于注解开发的方式寻找映射路径，调用相应Controller类的方法
@Autowired自动注入Service，并调用Service层相应方法
Service同样自动注入了DAO层的mapper接口，调用相应的mapper方法执行数据库操作
接口对应的mapper.xml配置文件，就是具体实现，包括具体sql语句等
在数据库获取到数据后，最后以json字符串的形式返回给前端
整个项目的jar包依赖通过maven来管理

技术介绍

为此我还写了一些前置博客来具体介绍，点击链接进入。

Maven项目管理(jar包)
Bootstrap前端框架(样式，模态框等)
MyBatis Generator逆向工程(根据数据库生成Mapper文件等)
JSR303后端检验
JQuery框架(前端校验，事件处理等)和ajax技术（动态请求数据，局部刷新/异步更新等）并以json数据格式（实现服务器和客户端跨平台(浏览器，安卓，ios等))返回数据。
pageHelper分页

效果演示

商品数据来源网络，侵删登录页面

用户界面

讨论区(留言板)的详情界面

管理员界面

配置代码

数据库代码

/*==============================================================*/
/* DBMS name:      MySQL 5.0                                    */
/* Created on:     2020/5/20 21:43:05                           */
/*==============================================================*/

drop table if exists revert;

drop table if exists message;

drop table if exists product;


drop table if exists user;

/*==============================================================*/
/* Table: message                                               */
/*==============================================================*/
create table message
(
   mid            int not null AUTO_INCREMENT,
   uid               int,
   pid            int,
   title                varchar(25),
   content              varchar(200),
   time                 varchar(25),
   revertCount          int default 0,
   primary key (mid)
);

/*==============================================================*/
/* Table: product                                               */
/*==============================================================*/
create table product
(
   pid            int not null AUTO_INCREMENT,
   name          varchar(30),
   brand                 varchar(25),
   model                varchar(25),
   price                numeric(10,1)check(price>0),
   picture              varchar(100),
   introduction         varchar(200),
   primary key (pid)
);

/*==============================================================*/
/* Table: revert                                                */
/*==============================================================*/
create table revert
(
   rid             int not null AUTO_INCREMENT,
   mid            int,
   uid               int,
   content              varchar(200),
   time                 varchar(25),
   primary key (rid)
);

/*==============================================================*/
/* Table: user                                                  */
/*==============================================================*/
create table user
(
   uid               int not null AUTO_INCREMENT,
   password             varchar(25),
   name             varchar(30),
   email                varchar(30),
   role                 varchar(10) default 'users',
   primary key (uid)
);

alter table message add constraint FK_Relationship_2 foreign key (pid)
      references product (pid) on delete cascade on update cascade;

alter table message add constraint FK_Relationship_4 foreign key (uid)
      references user (uid) on delete cascade on update cascade;

alter table revert add constraint FK_Relationship_3 foreign key (mid)
      references message (mid) on delete cascade on update cascade;

alter table revert add constraint FK_Relationship_5 foreign key (uid)
      references user (uid) on delete cascade on update cascade;

create trigger trOnMessage
after insert on revert for each row
	update message set revertCount=revertCount+1 where mid=new.mid;

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>jmu.wzl</groupId>
  <artifactId>experiment-9</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
   <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <!-- 引入项目依赖jar包 -->
  <dependencies>
  <!-- Springmvc,Spring -->
  	<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
	<dependency>
	    <groupId>org.springframework</groupId>
	    <artifactId>spring-webmvc</artifactId>
	    <version>4.3.7.RELEASE</version>
	</dependency>
  <!-- Spring-jdbc -->
	<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
	<dependency>
	    <groupId>org.springframework</groupId>
	    <artifactId>spring-jdbc</artifactId>
	    <version>4.3.7.RELEASE</version>
	</dependency>
  <!-- Spring面向切面编程 -->
	<!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
	<dependency>
	    <groupId>org.springframework</groupId>
	    <artifactId>spring-aspects</artifactId>
	    <version>4.3.7.RELEASE</version>
	</dependency>
  <!-- MyBatis -->
	<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
	<dependency>
	    <groupId>org.mybatis</groupId>
	    <artifactId>mybatis</artifactId>
	    <version>3.4.2</version>
	</dependency>
  <!-- MyBatis整合Spring适配包 -->
	<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
	<dependency>
	    <groupId>org.mybatis</groupId>
	    <artifactId>mybatis-spring</artifactId>
	    <version>1.3.1</version>
	</dependency>
  <!-- 数据库连接池，驱动 -->
	<!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
	<dependency>
	    <groupId>c3p0</groupId>
	    <artifactId>c3p0</artifactId>
	    <version>0.9.1.2</version>
	</dependency>
  <!-- Mysql驱动 -->
	<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
	<dependency>
	    <groupId>mysql</groupId>
	    <artifactId>mysql-connector-java</artifactId>
	    <version>8.0.19</version>
	</dependency>
  <!-- jstl -->
	<!-- https://mvnrepository.com/artifact/jstl/jstl -->
	<dependency>
	    <groupId>jstl</groupId>
	    <artifactId>jstl</artifactId>
	    <version>1.2</version>
	</dependency>
  <!-- servlet-api -->
	<!-- https://mvnrepository.com/artifact/javax.servlet/servlet-api -->
	<dependency>
	    <groupId>javax.servlet</groupId>
	    <artifactId>javax.servlet-api</artifactId>
	    <version>3.0.1</version>
	    <scope>provided</scope>
	</dependency>
  <!-- junit -->
	<!-- https://mvnrepository.com/artifact/junit/junit -->
	<dependency>
	    <groupId>junit</groupId>
	    <artifactId>junit</artifactId>
	    <version>4.12</version>
	    <scope>test</scope>
	</dependency>
	<!-- MyBatis Generator -->
	<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
	<dependency>
	    <groupId>org.mybatis.generator</groupId>
	    <artifactId>mybatis-generator-core</artifactId>
	    <version>1.3.5</version>
	</dependency>
	<!-- Spring test -->
	<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
	<dependency>
	    <groupId>org.springframework</groupId>
	    <artifactId>spring-test</artifactId>
	    <version>4.3.7.RELEASE</version>
	    <scope>test</scope>
	</dependency>
	<!-- PageHelper分页插件 -->
	<dependency>
		<groupId>com.github.pagehelper</groupId>
		<artifactId>pagehelper</artifactId>
		<version>5.0.0</version>
	</dependency>
	<!-- taglibs -->
	<dependency>
	<groupId>taglibs</groupId>
	<artifactId>standard</artifactId>
	<version>1.1.2</version>
	</dependency>
	<!-- jackson(返回json字符串的支持) -->
	<dependency>
	<groupId>com.fasterxml.jackson.core</groupId>
	<artifactId>jackson-databind</artifactId>
	<version>2.8.8</version>
	</dependency>
	<!-- JSR303数据校验支持 -->
	<dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-validator</artifactId>
      <version>5.1.0.Final</version>
    </dependency>
    <dependency>
       <groupId>javax.el</groupId>
       <artifactId>javax.el-api</artifactId>
       <version>3.0.0</version>
    </dependency>
  </dependencies>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
	<!--1.启动Spring容器  -->
	<!-- needed for ContextLoaderListener -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>

	<!-- Bootstraps the root web application context before servlet initialization -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- 2.SpringMvc前端控制器（拦截请求） -->
	<!-- The front controller of this Spring Web application, responsible for handling all application requests -->
	<servlet>
		<servlet-name>dispatcherServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<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.字符编码过滤器 -->
	<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.Rest风格uri（post请求转为delete/put请求） -->
	<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>

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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		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-4.3.xsd">

	<!-- 1.SpringMvc配置文件(网站跳转逻辑) -->
	<context:component-scan base-package="jmu.wzl" use-default-filters="false">
		<!-- 只扫描控制器 -->
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	
	<!-- 2.视图解析器配置（方便页面返回） -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/views/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	<!-- 3.标准配置 -->
		<!-- 3.1将SpringMvc不能处理的请求交给tomcat -->
		<mvc:default-servlet-handler/>
		<!-- 3.2支持SpringMvc高级功能 (JSR303校验，快捷ajax,映射动态请求)-->
		<mvc:annotation-driven/>
</beans>

applicationContext.xml

<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/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
	
	<!-- Spring配置文件核心点(数据源，MyBatis整合，事务控制) -->
	<!-- 扫描控制器外的所有(控制器SpringMvc扫了) -->
	<context:component-scan base-package="jmu.wzl">
		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	
	<!-- 数据源  -->
	<context:property-placeholder location="classpath:dbconfig.properties"/>
	<bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
		<property name="driverClass" value="${jdbc.driverClass}"></property>
		<property name="user" value="${jdbc.user}"></property>
		<property name="password" value="${jdbc.password}"></property>
	</bean>
	
	<!-- MyBatis整合配置 -->
	<bean id="SqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 指定 MyBatis全局配置文件-->
		<property name="configLocation" value="classpath:myBatis-config.xml"></property>
		<property name="dataSource" ref="pooledDataSource"></property>
		<!-- 指定MyBatis。mapper文件的位置 -->
		<property name="mapperLocations" value="classpath:mapper/*.xml"></property>
	</bean>
	
	<!-- 扫描器配置(将MyBatis接口实现加入待ioc容器) -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 扫描所有dao接口的实现加入ioc容器 -->
		<property name="basePackage" value="jmu.wzl"></property>
	</bean>
	
	<!-- 事务控制配置 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 控制住数据源 -->
		<property name="dataSource" ref="pooledDataSource"></property>
	</bean>
	
	<!-- 开启基于注解的事务，使用xml配置形式的事务 -->
	<aop:config>
		<!-- 切入点表达式 -->
		<aop:pointcut expression="execution(* jmu.wzl.service..*(..))" id="txPoint"/>
		<!-- 配置事务 -->
		<aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
	</aop:config>
	
	<!-- 配置事务增强(事务如何切入) -->
	<tx:advice id="txAdvice">
		<tx:attributes>
			<!-- 所有方法都是事务方法 -->
			<tx:method name="*"/>
			<!-- 以get开始的所有方法 -->
			<tx:method name="get*" read-only="true"/>
		</tx:attributes>
	</tx:advice>
	
</beans>

完整源码

整理不易，如果有积分的话，可以花1分支持下博主：CSDN下载地址当然了，如果没有积分，我也开源到了github：github下载地址

原创不易，请勿转载（~~本不富裕的访问量雪上加霜~~ ）博主首页：https://blog.csdn.net/qq_45034708

SSM整合开发实战 SSM-MALL

SSM-MALL

前言