手把手带你实现Spring、SpringMVC与Mybatis整合工程的搭建
今天给大家带来的的SSM整合，在系统的学习完Spring +SpringMVC+Mybatis框架后，我们就可以开始整合SSM框架了，这里给大家介绍的是SSM_CRUD的demo项目整合，CRUD(create 创建、retrieve 查询、update 更新、delete 删除)也是SSM框架中最为常用的工程功能。
项目开源 https://github.com/AixsCode/SSM_CRUD（对ssm入门整合还是挺有帮助的、希望大家点点小手可以多给几个star哦 ，谢谢啦）下面是项目截图
ssm_crud 项目的功能点：
1、分页
2、数据校验（Jquery前端校验+JSR303后端校验）
3、ajax
4、Rest风格的URI：使用HTTP协议请求方式的动词，来表示对资源的操作（GET(查询)、POST(新赠)、PUT(修改)、DELETE(删除)）
技术点：
1、基础框架-ssm(SpringMVC+Spring+Mybatis)
2、数据库-MySQL
3、前端框架-bootstrap快速搭建简洁美观的界面
4、项目的依赖管理-Maven
5、分页-pagehelper
6、mybatis Generator-逆向工程
接下来带领大家来进行工程的搭建：
一、基础环境搭建
1. 1、 创建一个maven工程、在pom.xml 中引入项目依赖的jar包 ，下面是最终目录结构：
pom.xml 代码如下：
<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>4.0.0modelVersion>
<groupId>com.atguigugroupId>
<artifactId>ssm-crudartifactId>
<version>0.0.1-SNAPSHOTversion>
<packaging>warpackaging>
<dependencies>
<dependency>
<groupId>com.github.pagehelpergroupId>
<artifactId>pagehelperartifactId>
<version>5.0.0version>
dependency>
<dependency>
<groupId>org.mybatis.generatorgroupId>
<artifactId>mybatis-generator-coreartifactId>
<version>1.3.5version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>4.3.7.RELEASEversion>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.8.8version>
dependency>
<dependency>
<groupId>org.hibernategroupId>
<artifactId>hibernate-validatorartifactId>
<version>5.4.1.Finalversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>4.3.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>4.3.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aspectsartifactId>
<version>4.3.7.RELEASEversion>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.4.2version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>1.3.1version>
dependency>
<dependency>
<groupId>c3p0groupId>
<artifactId>c3p0artifactId>
<version>0.9.1version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.41version>
dependency>
<dependency>
<groupId>jstlgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.0.1version>
<scope>providedscope>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
dependency>
dependencies>
project>到这一步我们就完全引入了项目依赖的jar包。
**1.2、引入bootstrap前端框架
bootstrap-3.3.7-dist可以在（http://v3.bootcss.com）进行下载，后者直接在我的github进行Download**
1.3、编写SSM框架的关键配置文件。
- web.xml 文件 : web项目工程的必备文件，主要用来启动Spring 容器以及关联applicationContext.xml 和拦截所有请求、以及字符编码过滤器
applicationContext.xml: Spring的配置文件、和mybatis的整合配置
dispatcherServlet-servlet.xml: SpringMVC配置文件
mybatis-config.xml: mybatis配置文件
各个配置文件内容：
web.xml:
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:applicationContext.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<servlet>
<servlet-name>dispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>dispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>CharacterEncodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>utf-8param-value>
init-param>
<init-param>
<param-name>forceRequestEncodingparam-name>
<param-value>trueparam-value>
init-param>
<init-param>
<param-name>forceResponseEncodingparam-name>
<param-value>trueparam-value>
init-param>
filter>
<filter-mapping>
<filter-name>CharacterEncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<filter>
<filter-name>HiddenHttpMethodFilterfilter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilter-class>
filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<filter>
<filter-name>HttpPutFormContentFilterfilter-name>
<filter-class>org.springframework.web.filter.HttpPutFormContentFilterfilter-class>
filter>
<filter-mapping>
<filter-name>HttpPutFormContentFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
web-app>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/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-3.2.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">
<context:component-scan base-package="com.aixs">
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
context:component-scan>
<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>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis-config.xml">property>
<property name="dataSource" ref="pooledDataSource">property>
<property name="mapperLocations" value="classpath:mapper/*.xml">property>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.aixs.crud.dao">property>
bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory">constructor-arg>
<constructor-arg name="executorType" value="BATCH">constructor-arg>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="pooledDataSource">property>
bean>
<aop:config>
<aop:pointcut expression="execution(* com.aixs.crud.service..*(..))" id="txPoint"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*"/>
<tx:method name="get*" read-only="true"/>
tx:attributes>
tx:advice>
beans>
dispatcherServlet-servlet.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: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">
<context:component-scan base-package="com.aixs" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/">property>
<property name="suffix" value=".jsp">property>
bean>
<mvc:default-servlet-handler/>
<mvc:annotation-driven/>
beans>
mybatis-config.xml
<configuration>
<settings>
<setting name="mapUnderscoreToCamelCase" value="true">setting>
settings>
<typeAliases>
<package name="com.aixs.crud.bean">package>
typeAliases>
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<property name="reasonable" value="true"/>
plugin>
plugins>
configuration>配置完成后即可用mybatis逆向工程生成对应的bean以及mapper文件
1.4 建立mbg.xml文件进行逆向工程配置
mbg.xml内容：
<generatorConfiguration>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressAllComments" value="true" />
commentGenerator>
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
password="5035811wang">
jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
javaTypeResolver>
<javaModelGenerator targetPackage="com.aixs.crud.bean"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
javaModelGenerator>
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true" />
sqlMapGenerator>
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.aixs.crud.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
javaClientGenerator>
<table tableName="tbl_emp" domainObjectName="Employee">table>
<table tableName="tbl_dept" domainObjectName="Department">table>
context>
generatorConfiguration>然后在test包下面创建MBGTest 进行mapper、bean文件的生成
具体内容如下：
package com.aixs.crud.test;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;
public class MBGTest {
public static void main(String[] args) throws Exception
{
List warnings=new ArrayList();
boolean overwrite=true;
File configFile=new File("mbg.xml");
ConfigurationParser cp=new ConfigurationParser(warnings);
Configuration config=cp.parseConfiguration(configFile);
DefaultShellCallback callback=new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
}
}
经过上述步骤，我们便完成了Spring、Spring MVC与Mybatis的整合。
二、代码结构
