7.整合SSM
1.环境要求：
环境：
- IDEA
- MySQL 5.7.19
- Tomcat 9
- Maven 3.6
要求：
- 需要熟练掌握MySQL数据库，Spring，JavaWeb及MyBatis知识，简单的前端知识；
2.数据库表
创建一个存放书籍数据的数据库表
CREATE DATABASE `ssmbuild`;
USE `ssmbuild`;
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT(11) NOT NULL COMMENT '数量',
`detail` VARCHAR(200) NOT NULL COMMENT '描述',
KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8
INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');
3.基本环境搭建
1.新建一个Maven项目！ssmbuild，添加web的支持
2.导入相关的pom依赖
<!--依赖：junit，数据库驱动，连接池，servlet，jsp，mybatis，mybatis-Spring，Spring-->
<dependencies>
<!--Junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--数据库驱动Mysql-->
<!--mysql驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
<!-- 数据库连接池 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<!--Servlet - JSP -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.2</version>
</dependency>
<!--Spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<!--导入Lombok依赖-->
<!-- <https://mvnrepository.com/artifact/org.projectlombok/lombok> -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
</dependencies>
3.Maven资源过滤器问题
<!--静态资源导出问题-->
<!--在build中配置resources，来防止我们资源导出失败的问题-->
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
4.建立基本结构和配置框架
- com.itxiaofei.pojo
- com.itxiaofei.mapper
- com.itxiaofei.service
- com.itxiaofei.controller
- Mybatis-config.xml
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"<http://mybatis.org/dtd/mybatis-3-config.dtd>">
<configuration>
<!--引入外部配置文件-->
<properties resource="database.properties">
<property name="username" value="root"/>
<property name="password" value="111222"/>
</properties>
<!--配置数据源，交给Spring去做-->
<!--类型别名:开启才可以给实体类起别名-->
<typeAliases>
<package name="com.itxiaofei.pojo"/>
</typeAliases>
<!--绑定接口：mapper-->
<mappers>
<mapper class="com.itxiaofei.mapper.BookMapper"/>
</mappers>
</configuration>
- database.properties
#外部配置文件
jdbc.driver=com.mysql.jdbc.Driver
#如果使用的是Mybatis8.0+，增加一个时区的配置；&serviceTimezone=Asia/shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&userUnicode=true&serviceTimezone=Asia/shanghai&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456
- applicationContext.xml
<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="<http://www.springframework.org/schema/beans>"
xmlns:xsi="<http://www.w3.org/2001/XMLSchema-instance>"
xsi:schemaLocation="<http://www.springframework.org/schema/beans>
<http://www.springframework.org/schema/beans/spring-beans.xsd>">
<!--导入三大配置文件到ioc容器中-->
<import resource="classpath:spring-mvc.xml"/>
<import resource="classpath:Spring-service.xml"/>
<import resource="classpath:Spring-Mapper.xml"/>
</beans>
- 编写Spring-Mybatis整合配置文件——Spring-Mybatis.xml
<?xml version="1.0" encoding="UTF8"?>
<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>
<https://www.springframework.org/schema/context/spring-context.xsd>
<http://www.springframework.org/schema/mvc>
<https://www.springframework.org/schema/mvc/spring-mvc.xsd>">
<!--1.管理数据库配置文件-->
<context:property-placeholder location="classpath:database.properties"/>
<!--2.连接池
dbcp:半自动化操作，不能自动连接
c3p0:自动化操作（自动化的加载配置文件，并且可以自动设置到对象中！）
druid:
hikari:
-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- c3p0连接池的私有属性 -->
<property name="maxPoolSize" value="30"/>
<property name="minPoolSize" value="10"/>
<!-- 关闭连接后不自动commit -->
<property name="autoCommitOnClose" value="false"/>
<!-- 获取连接超时时间 -->
<property name="checkoutTimeout" value="10000"/>
<!-- 当获取连接失败重试次数 -->
<property name="acquireRetryAttempts" value="2"/>
</bean>
<!--3.sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis的配置文件-->
<property name="configLocation" value="classpath:Mybatis-Config.xml"/>
</bean>
<!--4.配置Mapper接口扫描包，动态实现了Mapper接口可以注入到Spring容器中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注入sqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!--要扫描的Mapper包-->
<property name="basePackage" value="com.itxiaofei.mapper"/>
</bean>
</beans>
- Spring整合Service层——Spring-Service.xml
<?xml version="1.0" encoding="UTF8"?>
<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>"
xsi:schemaLocation="<http://www.springframework.org/schema/beans>
<http://www.springframework.org/schema/beans/spring-beans.xsd>
<http://www.springframework.org/schema/context>
<https://www.springframework.org/schema/context/spring-context.xsd>">
<!--1.扫描service下的bean-->
<context:component-scan base-package="com.itxiaofei.service"/>
<!--2.将我们的所有业务类，注入到Spring，可以通过配置，或者注解实现-->
<bean id="BookServiceImpl" class="com.itxiaofei.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper"/>
</bean>
<!--声明式事务配置-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--注入数据源-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!--AOP事务支持-->
</beans>
-
编写Spring-MVC层（web.xml and Spring-MVC.xml）
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="<http://xmlns.jcp.org/xml/ns/javaee>"
xmlns:xsi="<http://www.w3.org/2001/XMLSchema-instance>"
xsi:schemaLocation="<http://xmlns.jcp.org/xml/ns/javaee> <http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd>"
version="4.0">
<!--DispatcherServlet-->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--SpringMVC提供的解决乱码过滤器：encodingFilter-->
<filter>
<filter-name>encodingFilter</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>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--Session过期时间-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
Spring-MVC.xml
<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="<http://www.springframework.org/schema/beans>"
xmlns:xsi="<http://www.w3.org/2001/XMLSchema-instance>"
xmlns:mvc="<http://www.springframework.org/schema/mvc>"
xmlns:context="<http://www.springframework.org/schema/context>"
xsi:schemaLocation="<http://www.springframework.org/schema/beans>
<http://www.springframework.org/schema/beans/spring-beans.xsd>
<http://www.springframework.org/schema/mvc>
<http://www.springframework.org/schema/mvc/spring-mvc.xsd> <http://www.springframework.org/schema/context> <https://www.springframework.org/schema/context/spring-context.xsd>">
<!--1.开启注解驱动-->
<mvc:annotation-driven/>
<!--2.静态资源过滤-->
<mvc:default-servlet-handler/>
<!--3.扫描包：controller-->
<context:component-scan base-package="com.itxiaofei.controller"/>
<!--4.配置jsp 显示ViewResolver视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<!--前缀-->
<property name="prefix" value="/WEB-INF/jsp/" />
<!--后缀-->
<property name="suffix" value=".jsp" />
</bean>
</beans>
配置文件到此，暂时结束，配置地狱到现在也先告一段落！
原文地址：http://www.cnblogs.com/itxiaofei/p/16881193.html
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