Spring+SpringMVC+MyBatis+Maven框架整合

本文记录了Spring+SpringMVC+MyBatis+Maven框架整合的记录，主要记录以下几点?
一、Maven需要引入的jar包?
二、Spring与SpringMVC的配置分离?
三、Spring与MyBatis的整合?
一、Maven需要引入的jar包?
本文默认读者已经掌握Maven的使用，Maven配置片段如下?

Xml代码??

1. <!--?引入spring-webmvc与spring-jdbc?-->??
2. <dependency>??
3. ????<groupId>org.springframework</groupId>??
4. ????<artifactId>spring-webmvc</artifactId>??
5. ????<version>${springframework.version}</version>??
6. </dependency>??
7. <dependency>??
8. ????<groupId>org.springframework</groupId>??
9. ????<artifactId>spring-jdbc</artifactId>??
10. ????<version>${springframework.version}</version>??
11. </dependency>??
12. <!--?引入mybatis与mybatis-spring整合包?-->??
13. <dependency>??
14. ????<groupId>org.mybatis</groupId>??
15. ????<artifactId>mybatis</artifactId>??
16. ????<version>${mybatis.version}</version>??
17. </dependency>??
18. <dependency>??
19. ????<groupId>org.mybatis</groupId>??
20. ????<artifactId>mybatis-spring</artifactId>??
21. ????<version>${mybatis-spring.version}</version>??
22. </dependency>??
23. <!--?引入oracle数据库jdbc驱动包?-->??
24. <dependency>??
25. ????<groupId>com.oracle</groupId>??
26. ????<artifactId>ojdbc14</artifactId>??
27. ????<version>${oracle14.version}</version>??
28. </dependency>??
29. <!--?引入c3p0连接池依赖包?-->??
30. <dependency>??
31. ????<groupId>c3p0</groupId>??
32. ????<artifactId>c3p0</artifactId>??
33. ????<version>${c3p0.version}</version>??
34. </dependency>??

二、Spring与SpringMVC的配置分离?

1、有必要说明一下，web.xml中配置的执行顺序获取【下载地址】? ?：?
listener>filter>servlet，而同一种配置片段则按照从上到下的顺序执行。?

2、web.xml的配置片段，下面的配置信息将Spring与SpringMVC的配置分别放到了applicationContext*.xml和springmvc-servlet.xml?

Xml代码??

1. <!--?配置spring-web上下文监听器?-->??
2. <listener>??
3. ????<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>??
4. </listener>??
5. <!--?配置需要读取的spring配置文件路径?-->??
6. <!--?classpath*表示读取多个classpath?-->??
7. <!--?applicationContext*表示匹配多个applicationContext开头的spring配置文件?-->??
8. <context-param>??
9. ????<param-name>contextConfigLocation</param-name>??
10. ????<param-value>classpath*:applicationContext*.xml</param-value>??
11. </context-param>??
12. ??
13. <!--?配置springmvc的DispatcherServlet，处理所有.do结尾的url?-->??
14. <servlet>??
15. ????<servlet-name>springmvc</servlet-name>??
16. ????<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>??
17. ????<!--?配置springmvc的配置文件路径?-->??
18. ????<init-param>??
19. ????????<param-name>contextConfigLocation</param-name>??
20. ????????<param-value>classpath:springmvc-servlet.xml</param-value>??
21. ????</init-param>??
22. </servlet>??
23. <servlet-mapping>??
24. ????<servlet-name>springmvc</servlet-name>??
25. ????<url-pattern>*.do</url-pattern>??
26. </servlet-mapping>??
27. ??
28. <!--?配置springmvc编码拦截器?-->??
29. <filter>??
30. ????<filter-name>encodingFilter</filter-name>??
31. ????<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>??
32. ????<init-param>??
33. ????????<param-name>encoding</param-name>??
34. ????????<param-value>utf-8</param-value>??
35. ????</init-param>??
36. ????<init-param>??
37. ????????<param-name>forceEncoding</param-name>??
38. ????????<param-value>true</param-value>??
39. ????</init-param>??
40. </filter>??
41. <filter-mapping>??
42. ????<filter-name>encodingFilter</filter-name>??
43. ????<url-pattern>/*</url-pattern>??
44. </filter-mapping>??

3、springmvc的配置片段如下，springmvc-servlet.xml?

Xml代码??

1. <!--?自动扫描注解，只扫描的Controller注解，其它注解的扫描交给spring去处理?-->??
2. <context:component-scan?base-package="org.jisonami.controller">??
3. ????<context:include-filter?type="annotation"?expression="org.springframework.stereotype.Controller"/>??
4. </context:component-scan>??
5. <!--?配置springmvc的视图解析器?-->??
6. <bean?id="viewResolver"?class="org.springframework.web.servlet.view.InternalResourceViewResolver"??
7. p:prefix="/WEB-INF/content/"?p:suffix=".jsp">??
8. </bean>??

4、目前本例中只是用了一个spring配置文件，即applicationContext.xml，如下：?
<!-- 自动扫描spring注解，排除springmvc已扫描的Controller注解 -->?

Xml代码??

1. <context:component-scan?base-package="org.jisonami">??
2. ????<context:exclude-filter?type="annotation"?expression="org.springframework.stereotype.Controller"/>??
3. </context:component-scan>??

5、关于spring配置文件中的xml头部：?

Xml代码??

1. <?xml?version="1.0"?encoding="UTF-8"?>??
2. <beans?xmlns="http://www.springframework.org/schema/beans"??
3. ????xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"??
4. ????xmlns:p="http://www.springframework.org/schema/p"??
5. ????xmlns:context="http://www.springframework.org/schema/context"??
6. ????xsi:schemaLocation="??
7. ????????http://www.springframework.org/schema/beans??
8. ????????http://www.springframework.org/schema/beans/spring-beans.xsd??
9. ????????http://www.springframework.org/schema/context??
10. ????????http://www.springframework.org/schema/context/spring-context.xsd">??

6、此时已经可以在代码中使用注解来配置spring的bean了，即如下形式的代码完成依赖注入：?

Java代码??

1. @Autowired??
2. private?UserService?userService;??

三、Spring与MyBatis的整合?
1、MyBatis的使用主要是使用Mapper接口+Mapper.xml中写sql的方式来实现更灵活的dao层，这一部分在与spring整合之后是不变的?
而mybatis的全局配置文件则是SqlMapConfig.xml，也可以是其它的名字。?

2、整合之前，数据库的连接信息是在SqlMapConfig.xml中配置的，并且Mapper的扫描也是在SqlMapConfig.xml中配置的?
最麻烦的是我们完成crud操作的代码有比较多的冗余，即如下所示的形式：?

Java代码??

1. //?完成一个新增操作??
2. InputStream?is?=?Resources.getResourceAsStream("SqlMapConfig.xml");??
3. SqlSessionFactory?sessionFactory?=?new?SqlSessionFactoryBuilder().build(is);??
4. SqlSession?session?=?sessionFactory.openSession();??
5. UserMapper?userMapper?=?session.getMapper(UserMapper.class);??
6. userMapper.save(user);??
7. session.commit();??
8. session.close();??

3、与spring整合的目的则是将SqlSessionFactory、SqlSession、UserMapper的创建和SqlSession的事物提交与关闭交给spring容器进行管理，?
实现只需要调用一行代码的效果，即?

Java代码??

1. userMapper.save(user);??

4、整合之后，数据库的连接信息与Mapper的扫描的配置片段直接移到applicationContext.xml中去了，完成SqlSessionFactory、SqlSession、UserMapper注入?
applicationContext.xml中mybatis的配置片段：?

Xml代码??

1. <!--?mybatis与spring整合?-->??
2. <!--?加载数据库配置文件?-->??
3. <context:property-placeholder?location="classpath:DBConfig.properties"/>??
4. <!--?配置数据源，使用c3p0连接池?-->??
5. <bean?id="dataSource"?class="com.mchange.v2.c3p0.ComboPooledDataSource"?destroy-method="close">??
6. ????<property?name="driverClass"?value="${jdbc.driver}"></property>??
7. ????<property?name="jdbcUrl"?value="${jdbc.url}"></property>??
8. ????<property?name="user"?value="${jdbc.user}"></property>??
9. ????<property?name="password"?value="${jdbc.pass}"></property>??
10. </bean>??
11. <!--?配置sqlSessionFactory?-->??
12. <bean?id="sqlSessionFactory"?class="org.mybatis.spring.SqlSessionFactoryBean">??
13. ????<property?name="configLocation"?value="classpath:SqlMapConfig.xml"?/>??
14. ????<property?name="dataSource"?ref="dataSource"?/>??
15. </bean>??
16. <!--?扫描mapper接口?-->??
17. <bean?class="org.mybatis.spring.mapper.MapperScannerConfigurer">??
18. ????<property?name="basePackage"?value="org.jisonami.mybatis.mapper"></property>??
19. ????<property?name="sqlSessionFactoryBeanName"?value="sqlSessionFactory"></property>??
20. </bean>??

5、原来的SqlMapConfig.xml文件中只剩下寥寥几行配置信息，?

Xml代码??

1. <configuration>??
2. ????<!--?给entity起别名，在mapper配置文件中写sql语句时会用到?-->??
3. ????<typeAliases>??
4. ????????<package?name="org.jisonami.entity"/>??
5. ????</typeAliases>??
6. </configuration>??

6、以UserMapper.xml配置片段为例，描述整合后的简洁编程方式?

Xml代码??

1. <!--?mapper的命名空间namespace是Mapper接口的全限定名?-->??
2. <mapper?namespace="org.jisonami.mybatis.mapper.UserMapper">??
3. ??
4. ????<!--?id是唯一标识符，与Mapper接口的方法名保持一致，参数类型parameterType是参数类型的全限定名，这里使用的是别名?-->??
5. ????<insert?id="save"?parameterType="User">??
6. ????????<selectKey?keyColumn="id"?keyProperty="id"?resultType="String"?order="BEFORE">??
7. ????????????select?sys_guid()?from?dual??
8. ????????</selectKey>??
9. ????????insert?into?t_user(id,?name,?password)?values(#{id},?#{name},?#{password})??
10. ????</insert>??
11. </mapper>??

UserMapper接口中的方法声明如下：?

Java代码??

1. public?interface?UserMapper?{??
2. ????public?void?save(User?user);??
3. }??

调用部分代码，直接注入UserMapper?

Java代码??

1. @Autowired??
2. private?UserMapper?userMapper;??
3. public?void?save(User?user)?{??
4. ????userMapper.save(user);??
5. }??

?

Spring+SpringMVC+MyBatis+Maven框架整合

原文：http://201605072609.iteye.com/blog/2298285