(转)Spring集成MyBatis进行项目开发（一）

原文出处：http://wangjie2013.iteye.com/blog/1996135

下面将介绍使用spring+mybatis的开发样例：

? ? 首先，笔者创建的是一个maven工程，在开发先先导入相关的依赖jar：

? ? pom.xml:

?

Xml代码??

1. <dependencies>??
2. ????????<dependency>??
3. ????????????<groupId>junit</groupId>??
4. ????????????<artifactId>junit</artifactId>??
5. ????????????<version>4.11</version>??
6. ????????????<scope>test</scope>??
7. ????????</dependency>??
8. ????????<!--?spring3?相关依赖?-->??
9. ????????<dependency>??
10. ????????????<groupId>org.springframework</groupId>??
11. ????????????<artifactId>spring-core</artifactId>??
12. ????????????<version>3.0.5.RELEASE</version>??
13. ????????</dependency>??
14. ????????<dependency>??
15. ????????????<groupId>org.springframework</groupId>??
16. ????????????<artifactId>spring-context</artifactId>??
17. ????????????<version>3.0.5.RELEASE</version>??
18. ????????</dependency>??
19. ????????<dependency>??
20. ????????????<groupId>org.springframework</groupId>??
21. ????????????<artifactId>spring-beans</artifactId>??
22. ????????????<version>3.0.5.RELEASE</version>??
23. ????????</dependency>??
24. ????????<dependency>??
25. ????????????<groupId>org.springframework</groupId>??
26. ????????????<artifactId>spring-jdbc</artifactId>??
27. ????????????<version>3.0.5.RELEASE</version>??
28. ????????</dependency>??
29. ????????<!--?spring?MVC?-->??
30. ????????<dependency>??
31. ????????????<groupId>org.springframework</groupId>??
32. ????????????<artifactId>spring-web</artifactId>??
33. ????????????<version>3.0.5.RELEASE</version>??
34. ????????</dependency>??
35. ????????<dependency>??
36. ????????????<groupId>org.springframework</groupId>??
37. ????????????<artifactId>spring-webmvc</artifactId>??
38. ????????????<version>3.0.5.RELEASE</version>??
39. ????????</dependency>??
40. ????????<!--?mysql?jdbc?driver?-->??
41. ????????<dependency>??
42. ????????????<groupId>mysql</groupId>??
43. ????????????<artifactId>mysql-connector-java</artifactId>??
44. ????????????<version>5.1.13</version>??
45. ????????</dependency>??
46. ????????<!--?log?日志?-->??
47. ????????<dependency>??
48. ????????????<groupId>org.slf4j</groupId>??
49. ????????????<artifactId>slf4j-api</artifactId>??
50. ????????????<version>1.7.2</version>??
51. ????????</dependency>??
52. ????????<dependency>??
53. ????????????<groupId>org.slf4j</groupId>??
54. ????????????<artifactId>slf4j-log4j12</artifactId>??
55. ????????????<version>1.7.2</version>??
56. ????????</dependency>??
57. ????????<!--?mybatis-spring?插件?-->??
58. ????????<dependency>??
59. ????????????<groupId>org.mybatis</groupId>??
60. ????????????<artifactId>mybatis-spring</artifactId>??
61. ????????????<version>1.2.1</version>??
62. ????????</dependency>??
63. ????????<!--?mybatis依赖?-->??
64. ????????<dependency>??
65. ????????????<groupId>org.mybatis</groupId>??
66. ????????????<artifactId>mybatis</artifactId>??
67. ????????????<version>3.2.1</version>??
68. ????????</dependency>??
69. ??????????
70. ????????<dependency>??
71. ????????????<groupId>javax.servlet</groupId>??
72. ????????????<artifactId>javax.servlet-api</artifactId>??
73. ????????????<version>3.1.0</version>??
74. ????????????<scope>provided</scope>??
75. ????????</dependency>??
76. ????????<dependency>??
77. ????????????<groupId>jstl</groupId>??
78. ????????????<artifactId>jstl</artifactId>??
79. ????????????<version>1.2</version>??
80. ????????</dependency>??
81. ????????<!--?数据库连接池?-->??
82. ????????<dependency>??
83. ????????????<groupId>proxool</groupId>??
84. ????????????<artifactId>proxool</artifactId>??
85. ????????????<version>0.9.1</version>??
86. ????????</dependency>??
87. ????????<dependency>??
88. ????????????<groupId>proxool</groupId>??
89. ????????????<artifactId>proxool-cglib</artifactId>??
90. ????????????<version>0.9.1</version>??
91. ????????</dependency>??
92. ????????<!--?servlet-jsp?依赖，为编译jsp时使用?-->??
93. ????????<dependency>??
94. ????????????<groupId>javax.servlet.jsp</groupId>??
95. ????????????<artifactId>jsp-api</artifactId>??
96. ????????????<version>2.2</version>??
97. ????????????<scope>provided</scope>??
98. ????????</dependency>??
99. ????</dependencies>??
100. ??????

?

?

? ?web.xml中对spring和数据库连接池的配置：

Xml代码??

1. <context-param>??
2. ????<param-name>log4jConfigLocation</param-name>??
3. ????<param-value>/WEB-INF/log4j.xml</param-value>??
4. </context-param>??
5. <context-param>??
6. ????<param-name>log4jRefreshInterval</param-name>??
7. ????<param-value>60000</param-value>??
8. </context-param>??
9. ??
10. <listener>??
11. ????<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>??
12. </listener>??
13. ??
14. <!--?needed?for?ContextLoaderListener?-->??
15. <context-param>??
16. ????<param-name>contextConfigLocation</param-name>??
17. ????<param-value>/WEB-INF/applicationContext.xml</param-value>??
18. </context-param>??
19. ??
20. <!--?Bootstraps?the?root?web?application?context?before?servlet?initialization?-->??
21. <listener>??
22. ????<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>??
23. </listener>??
24. <!--?The?front?controller?of?this?Spring?Web?application,?responsible?for???
25. ????handling?all?application?requests?-->??
26. <servlet>??
27. ????<servlet-name>spring3</servlet-name>??
28. ????<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>??
29. ????<load-on-startup>2</load-on-startup>??
30. </servlet>??
31. ??
32. <!--?Map?all?requests?to?the?DispatcherServlet?for?handling?-->??
33. <servlet-mapping>??
34. ????<servlet-name>spring3</servlet-name>??
35. ????<url-pattern>/</url-pattern>??
36. </servlet-mapping>??
37. ??
38. <!--?database?proxool?config?-->??
39. <servlet>??
40. ????<servlet-name>ServletConfigurator</servlet-name>??
41. ????<servlet-class>org.logicalcobwebs.proxool.configuration.ServletConfigurator</servlet-class>??
42. ????<init-param>??
43. ????????<param-name>xmlFile</param-name>??
44. ????????<param-value>WEB-INF/proxool.xml</param-value>??
45. ????</init-param>??
46. ????<load-on-startup>1</load-on-startup>??
47. </servlet>??

?

? ? 在这里要注意，因为我使用了数据库连接池proxool，虽然已经设置servlet的启动级别是1，但是由于在servlet启动之前，spring（ContextLoaderListener）监听器已启动了，所以在spring监听启动时它会报一个找不到对应的数据源的SQLException。对于这个问题，本可以通过更改spring为servlet启动，并将启动级别设置为proxool配置加载之后解决：

?

?

Xml代码??

1. <servlet>??
2. ???<servlet-name>contextConfigLocation</servlet-name>??
3. ???<servlet-class>??
4. ????????????org.springframework.web.context.ContextLoaderServlet??
5. ???</servlet-class>??
6. ???<load-on-startup>2</load-on-startup>??
7. </servlet>??

?

?

? ? 但是因为spring3以后就不支持使用servlet启动了，官方推荐使用listener启动applicationContext。所以这个方法在新版本不适合了，不过这个异常可以忽略，因为proxool在整个项目加载完成的时候的确以及完成了加载，所以在项目运行起来以后是不会报错的，开始报错是spring做的一个检查。

?

? ? 为了解决乱码问题最好在web.xml中加上这个配置：

?

Xml代码??

1. <!--?character?filter.?use?UTF8?-->??
2. <filter>??
3. ????<filter-name>characterEncodingFilter</filter-name>??
4. ????<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>??
5. ????<init-param>??
6. ????????<param-name>encoding</param-name>??
7. ????????<param-value>UTF-8</param-value>??
8. ????</init-param>??
9. </filter>??
10. <filter-mapping>??
11. ????<filter-name>characterEncodingFilter</filter-name>??
12. ????<url-pattern>/*</url-pattern>??
13. </filter-mapping>??

?

下面是对spring3-servlet.xml的配置，它里面申明的bean都存放在webApplicationContext中：

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"?xmlns:mvc="http://www.springframework.org/schema/mvc"??
4. ????default-lazy-init="false"?xmlns:context="http://www.springframework.org/schema/context"??
5. ????xsi:schemaLocation="http://www.springframework.org/schema/mvc?http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd??
6. ????????http://www.springframework.org/schema/beans?http://www.springframework.org/schema/beans/spring-beans-3.0.xsd??
7. ????????http://www.springframework.org/schema/context?http://www.springframework.org/schema/context/spring-context-3.0.xsd">??
8. ??
9. ????<context:component-scan?base-package="com.pinche.statistic.web"></context:component-scan>??
10. ????<!--?启用spring?mvc注解?-->??
11. ????<mvc:annotation-driven?/>??
12. ????<!--?静态资源访问问题?-->??
13. ????<mvc:default-servlet-handler?/>??
14. ????<!--?Default?ViewResolver?-->??
15. ????<bean?class="org.springframework.web.servlet.view.InternalResourceViewResolver">??
16. ????????<property?name="viewClass"?value="org.springframework.web.servlet.view.JstlView"?/>??
17. ????????<property?name="prefix"?value="/WEB-INF/page/"></property>??
18. ????????<property?name="suffix"?value=".jsp"></property>??
19. ????</bean>??
20. ????<!--?对抛给spring的异常的处理?-->??
21. ????<bean?id="exceptionResolver"??
22. ????????class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">??
23. ????????<property?name="exceptionMappings">??
24. ????????????<props>??
25. ????????????????<prop?key="java.lang.Exception">error</prop>??
26. ????????????</props>??
27. ????????</property>??
28. ????</bean>??
29. </beans>??

?

? ? 下面对applicationContext.xml进行配置（这里使用了两个数据源）：

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. ????xmlns:tx="http://www.springframework.org/schema/tx"??
7. ????xsi:schemaLocation="http://www.springframework.org/schema/beans?http://www.springframework.org/schema/beans/spring-beans-3.0.xsd??
8. ????????http://www.springframework.org/schema/tx?http://www.springframework.org/schema/tx/spring-tx-3.0.xsd??
9. ????????http://www.springframework.org/schema/context?http://www.springframework.org/schema/context/spring-context-3.0.xsd">??
10. ??
11. ????<!--??
12. ????????数据源配置：这里配置了两个数据源dataSource_statistic和dataSource_pinche，??
13. ????分别注入到_sqlSessionFactory_statistic和_sqlSessionFactory_pinche??
14. ????-->??
15. ????<bean?id="dataSource_statistic"??
16. ????????class="org.springframework.jdbc.datasource.DriverManagerDataSource">??
17. ????????<!--?数据库连接?-->??
18. ????????<property?name="url"?value="proxool.statistic"?/>???
19. ????????<!--??
20. ????????这是不使用数据库连接池的配置方式，由于proxool只有在启动web应用的时候才能加载，??
21. ????????所以如果在初期开发阶段可以用这种简单的数据库连接方式，在通过??
22. ????????new?FileSystemXmlApplicationContext("src/main/webapp/WEB-INF/applicationContext.xml")??
23. ????????获取到context，并进行测试。??
24. ????????<property?name="driverClassName"?value="com.mysql.jdbc.Driver"/>??
25. ????????<property?name="url"?value="jdbc:mysql://192.168.1.168:3306/statistic"/>??
26. ????????<property?name="username"?value="statistic"></property>??
27. ????????<property?name="password"?value="statistic"></property>???
28. ?????????-->??
29. ????</bean>??
30. ????<bean?id="dataSource_pinche"??
31. ????????class="org.springframework.jdbc.datasource.DriverManagerDataSource">??
32. ????????<!--?数据库连接?-->??
33. ????????<property?name="url"?value="proxool.pinche"?/>???
34. ????</bean>??
35. ??????
36. ????<!--?为mybatis-spring注入数据源?-->??
37. ????<bean?name="_sqlSessionFactory_statistic"?class="org.mybatis.spring.SqlSessionFactoryBean">??
38. ????????<!--?注入数据源?-->??
39. ????????<property?name="dataSource"?ref="dataSource_statistic"></property>??
40. ????????<!--?注入别名的包名前缀，这样就可以在mybatis的文件中直接写类名不用写全名了?-->??
41. ????????<property?name="typeAliasesPackage"?value="com.pinche.statistic.domain"?/>??
42. ????</bean>??
43. ????<bean?name="_sqlSessionFactory_pinche"?class="org.mybatis.spring.SqlSessionFactoryBean">??
44. ????????<!--?注入数据源?-->??
45. ????????<property?name="dataSource"?ref="dataSource_pinche"></property>??
46. ????????<!--?注入别名的包名前缀，这样就可以在mybatis的文件中直接写类名不用写全名了?-->??
47. ????????<property?name="typeAliasesPackage"?value="com.pinche.statistic.domain"?/>??
48. ????????<!--?该配置文件用来指定Mapper映射文件的位置?，如果映射文件与相应的接口同名，且在同一路径下，那么可以不配置该选项-->??
49. ????????<!--<property?name="mapperLocations"?value="src/UserMapper.xml"/>-->??
50. ????????<!--??
51. ????????????该属性用来指定MyBatis的XML配置文件路径,跟Spring整合时，??
52. ????????????编写MyBatis映射文件的目的无非是配置一下typeAlias、setting之类的??
53. ????????????元素。不用在其中指定数据源，或者事务处理方式。就算配置了也会被忽略。??
54. ????????????因为这些都是使用Spring中的配置。当然如果你不打算添加typeAlias?之??
55. ????????????类的设置的话，你连MyBatis的配置文件都不用写，更不用配置这个属性了??
56. ????????-->??
57. ????????<!--?<property?name="configLocation"?value=""/>?-->??
58. ????</bean>??
59. ????<!--??
60. ????????注册Mapper方式一??
61. ????????<bean?id="userMapper"?class="org.mybatis.spring.mapper.MapperFactoryBean">???
62. ????????????<property?name="mapperInterface"?value="com.pinche.statistic.mapper.ApplicationsMapper"/>???
63. ????????????<property?name="sqlSessionFactory"?ref="_sqlSessionFactory_statistic"/>???
64. ????????</bean>??
65. ????-->??
66. ????<!--?注册Mapper方式二：也可不指定特定mapper，而使用自动扫描包的方式来注册各种Mapper?，配置如下：-->??
67. ????<!--???
68. ????<bean?class="org.mybatis.spring.mapper.MapperScannerConfigurer">??
69. ????????<property?name="basePackage"?value="com.pinche.statistic.mapper"></property>??
70. ????</bean>????
71. ????-->??
72. ????<bean?class="org.mybatis.spring.mapper.MapperScannerConfigurer">??
73. ????????<property?name="basePackage"?value="com.pinche.statistic.dialstatistic.mapper"></property>??
74. ????????<property?name="sqlSessionFactoryBeanName"?value="_sqlSessionFactory_pinche"></property>??
75. ????</bean>??
76. ????<bean?class="org.mybatis.spring.mapper.MapperScannerConfigurer">??
77. ????????<property?name="basePackage"?value="com.pinche.statistic.mapper"></property>??
78. ????????<property?name="sqlSessionFactoryBeanName"?value="_sqlSessionFactory_statistic"></property>??
79. ????</bean>???
80. ??????
81. ????<!--?事务?-->??
82. ????<!--?虽然mybatis也有自己的事务配置，但是配置了也没用，事务最终会交由spring控制，??
83. ????由于项目没有用到可以注掉。???
84. ????-->??
85. ????<!--?<bean?id="transactionManager"??
86. ????????class="org.springframework.jdbc.datasource.DataSourceTransactionManager">??
87. ????????<property?name="dataSource"?ref="dataSource_statistic"?/>??
88. ????</bean>??
89. ????<tx:annotation-driven?transaction-manager="transactionManager"/>?-->??
90. ??????
91. ????<!--?启用注解?-->??
92. ????<context:annotation-config?/>??
93. ??????
94. ????<!--?自动扫描注入?-->??
95. ????<context:component-scan??
96. ????????base-package="com.pinche.statistic.dao,??
97. ????????????????com.pinche.statistic.service"?/>??
98. </beans>??

? ? ?通过以上的工作环境的配置完成，下一章继续介绍spring-mybatis集成开发的剩余内容。