ssm整合详解
使用SSM（Spring、SpringMVC和Mybatis）已经有三个多月了，项目在技术上已经没有什么难点了，基于现有的技术就可以实现想要的功能，当然肯定有很多可以改进的地方。之前没有记录SSM整合的过程，这次刚刚好基于自己的一个小项目重新搭建了一次，而且比项目搭建的要更好一些。以前解决问题的过程和方法并没有及时记录，以后在自己的小项目中遇到我再整理分享一下。这次，先说说三大框架整合过程。个人认为使用框架并不是很难，关键要理解其思想，这对于我们提高编程水平很有帮助。不过，如果用都不会，谈思想就变成纸上谈兵了！！！先技术，再思想。实践出真知。（可通过图片水印查看博客地址）
1、基本概念
1.1、Spring
Spring是一个开源框架，Spring是于2003 年兴起的一个轻量级的Java 开发框架，由Rod Johnson 在其著作Expert One-On-One J2EE Development and Design中阐述的部分理念和原型衍生而来。它是为了解决企业应用开发的复杂性而创建的。Spring使用基本的JavaBean来完成以前只可能由EJB完成的事情。然而，Spring的用途不仅限于服务器端的开发。从简单性、可测试性和松耦合的角度而言，任何Java应用都可以从Spring中受益。 简单来说，Spring是一个轻量级的控制反转（IoC）和面向切面（AOP）的容器框架。
1.2、SpringMVC
Spring MVC属于SpringFrameWork的后续产品，已经融合在Spring Web Flow里面。Spring MVC 分离了控制器、模型对象、分派器以及处理程序对象的角色，这种分离让它们更容易进行定制。
1.3、MyBatis
MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code，并且改名为MyBatis 。MyBatis是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQL Maps和Data Access Objects（DAO）MyBatis 消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis 使用简单的 XML或注解用于配置和原始映射，将接口和 Java 的POJOs（Plain Old Java Objects，普通的 Java对象）映射成数据库中的记录。
2、开发环境搭建
如果需要，参看之前的博文：http://blog.csdn.net/zhshulin/article/details/30779873
3、Maven Web项目创建
如果需要，参看之前的博文：http://blog.csdn.net/zhshulin/article/details/37921705
4、SSM整合
下面主要介绍三大框架的整合，至于环境的搭建以及项目的创建，参看上面的博文。这次整合我分了2个配置文件，分别是spring-mybatis.xml，包含spring和mybatis的配置文件，还有个是spring-mvc的配置文件，此外有2个资源文件：jdbc.propertis和log4j.properties。完整目录结构如下（最后附上源码下载地址，不建议直接使用源码，因为此教程已经有了全部代码）：
4-1-1，导入Maven 需要的包
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <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>com.csw</groupId> <artifactId>backend</artifactId> <version>1.0-SNAPSHOT</version> <!--打包--> <packaging>war</packaging> <!--设置编码--> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <spring.version>5.1.0.RELEASE</spring.version> </properties> <!--引入文件--> <dependencies> <!-- Spring Web MVC --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- servlet 系列的支持 --> <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>8.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.1.7</version> </dependency> <!-- Springframework --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.1</version> </dependency> <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>6.0.3.Final</version> </dependency> <!-- MyBatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.2</version> </dependency> <!-- 数据库驱动以及数据库连接池--> <dependency> <groupId>org.mariadb.jdbc</groupId> <artifactId>mariadb-java-client</artifactId> <version>2.3.0</version> </dependency> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!-- 日志框架 --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <!-- 通用工具 --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.7</version> </dependency> <!-- 单元测试 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>contact</finalName> <plugins> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.7</version> <dependencies> <dependency> <groupId>org.mariadb.jdbc</groupId> <artifactId>mariadb-java-client</artifactId> <version>2.3.0</version> </dependency> </dependencies> </plugin> </plugins> </build> </project>
配置MyBatis
generatorConfig.xml 配置这个文件的好处就是自动生成实体类、接口、映射文件,但是MyBatis自身佩戴的生成器有一个缺点,就是设计的不严谨，这个主要还是看个人选择了 手动 滑稽/滑稽/
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <context id="xxx" targetRuntime="MyBatis3Simple"> <commentGenerator> <property name="suppressDate" value="true" /> </commentGenerator> <!-- 数据库连接 --> <jdbcConnection driverClass="org.mariadb.jdbc.Driver" connectionURL="jdbc:mariadb://localhost/dogo" userId="root" password="13794709305"> </jdbcConnection> <!-- Model生成规则 --> <javaModelGenerator targetPackage="com.csw.entity" targetProject="src/main/java"> <property name="trimStrings" value="true" /> </javaModelGenerator> <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/> <!-- dao 规则 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.csw.dao" targetProject="src/main/java"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <table tableName="%"> <generatedKey column="id" sqlStatement="Mysql"/> </table> </context> </generatorConfiguration>
jdbc.properties
jdbc.driver=org.mariadb.jdbc.Driver
jdbc.url=jdbc:mariadb://localhost:3306/maidanglao
jdbc.user=root
jdbc.password=13794709305
log4j.properties
# Global logging configuration
log4j.rootLogger=ERROR, ooo
# MyBatis logging configuration...
log4j.logger.com.nf147.dao=DEBUG
# 规则1,名字为 ooo，向标准输出 System.err/out
log4j.appender.ooo=org.apache.log4j.ConsoleAppender
log4j.appender.ooo.layout=org.apache.log4j.PatternLayout
log4j.appender.ooo.layout.ConversionPattern=%5p [%t] ~ %m%n
# 规则2，输出为文件
log4j.appender.000=org.apache.log4j.FileAppender
log4j.appender.000.File=d:/log/log.out
log4j.appender.000.layout=org.apache.log4j.PatternLayout
log4j.appender.000.layout.conversionPattern=%m %n
# 规则3，输出到数据库
log4j.appender.o0o=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.o0o.URL=jdbc:mariadb://localhost/dogo
log4j.appender.o0o.driver=org.mariadb.jdbc.Driver
log4j.appender.o0o.user=root
log4j.appender.o0o.password=13794709305
log4j.appender.o0o.layout=org.apache.log4j.PatternLayout
log4j.appender.o0o.sql=INSERT INTO LOGS VALUES('%t')
mybatis - config.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <settings> <!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 --> <setting name="useGeneratedKeys" value="true" /> <!-- 使用列别名替换列名 默认:true --> <setting name="useColumnLabel" value="true" /> <!-- 开启驼峰命名转换:Table {create_time} -> Entity {createTime} --> <setting name="mapUnderscoreToCamelCase" value="true" /> </settings> <plugins> <plugin interceptor="com.github.pagehelper.PageInterceptor" /> </plugins> </configuration>
4-1-2配置Spring文件
spring-web.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:contxt="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/cache http://www.springframework.org/schema/cache/spring-cache.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--启用注解扫描--> <contxt:component-scan base-package="com.csw"> <contxt:include-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </contxt:component-scan> <!--启用 mvc 的常用注解--> <mvc:annotation-driven validator="myValidator" /> <!--将所有的静态资源交还 Servlet 处理--> <mvc:default-servlet-handler /> <bean id="myValidator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"> <property name="providerClass" value="org.hibernate.validator.HibernateValidator" /> <property name="validationMessageSource" ref="messageSource" /> </bean> <bean id="themeSource" class="org.springframework.ui.context.support.ResourceBundleThemeSource"> <property name="basenamePrefix" value="themes." /> <!-- 哪个文件夹里 --> </bean> <bean id="themeResolver" class="org.springframework.web.servlet.theme.SessionThemeResolver"> <property name="defaultThemeName" value="girl" /> <!-- 默认主题文件的名字是 "可爱的小粉红"，如果不设置，名为 theme --> </bean> <!--配置返回页面--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!--配置上传下载--> <bean id="multipartResolver" class="org.springframework.web.multipart.support.StandardServletMultipartResolver" /> <!--<bean id="multipartResolver2" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">--> <!--<property name="maxUploadSize" value="10240000" />--> <!--<property name="defaultEncoding" value="UTF-8" />--> <!--</bean>--> </beans>
spring-dao.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:tx="http://www.springframework.org/schema/tx" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--使用外部文件--> <context:property-placeholder location="classpath:jdbc.properties" /> <context:component-scan base-package="com.csw.dao"/> <!--创建数据源--> <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="${jdbc.user}" /> <property name="password" value="${jdbc.password}" /> <property name="maxPoolSize" value="30" /> <property name="minPoolSize" value="10" /> <property name="autoCommitOnClose" value="false" /> <property name="checkoutTimeout" value="10000" /> <property name="acquireRetryAttempts" value="2" /> </bean> <!--配置 mybatis--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="typeAliasesPackage" value="com.csw.entity" /> <property name="configLocation" value="classpath:mybatis-config.xml" /> <property name="mapperLocations" value="classpath:mapper/*.xml" /> </bean> <!--自动注入 Mapper--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> <property name="basePackage" value="com.csw.dao" /> </bean> <!--配置声明式事务管理--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <tx:annotation-driven proxy-target-class="true" /> </beans>
spring-service.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" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!--启用注解--> <context:component-scan base-package="com.csw"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 启用 aspectj 方式 AOP--> <aop:aspectj-autoproxy proxy-target-class="true"/> </beans>
基本上整个ssm项目的结构就是这样了，第一次写博客,相信以后会越来越好的,蟹蟹大家的浏览。。
