SpringMVC与MyBatis的整合

SpringMVC与MyBatis的整合
1、文件结构图

所有需要的JAR包都引入以后，首先进行Spring与MyBatis的整合，先看一个项目结构图：

                     


1.1、建立JDBC属性文件

jdbc.properities

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://10.108.171.181:3306/mybatis?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=www1234
initialSize=0
maxIdle=20
minIdle=1 1.2、log4j日志系统(log4j.properities)
# log4j configuration used during build and unit tests
log4j.rootLogger=INFO,stdout
log4j.threshhold=ALL
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ISO8601} %-5p %c{2} (%F:%M(%L)) - %m%n2、web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
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">

<display-name>Develop Example</display-name>
<description>JSP 2.0 Tech Book's Examples</description>
<icon>
<small-icon>/images/small.gif</small-icon>
<large-icon>/images/large.gif</large-icon>
</icon>
<!-- 首页 -->
<welcome-file-list>
<welcome-file>/views/main.html</welcome-file>
<welcome-file>main.htm</welcome-file>
<welcome-file>main.jsp</welcome-file>
</welcome-file-list>
<!-- 错误页 -->
<error-page>
<error-code>404</error-code>
<location>/views/error.html</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/rest/page/500</location>
</error-page>
<!-- 配置Spring配置文件路径 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<!-- 配置Spring上下文监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- 配置log4j配置文件路径 -->
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/mybatis/log4j.properties</param-value>
</context-param>
<!-- 配置Log4j监听器 -->
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<!-- Spring MVC 核心控制器 DispatcherServlet 配置 -->
<servlet>
<servlet-name>index</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/index-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>index</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

<!-- 解决post乱码问题的过滤器 -->
<filter>
<filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>

3、applicationContext.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:mvc="http://www.springframework.org/schema/mvc"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> 
<!-- 加载数据库连接的资源文件 -->
<context:property-placeholder location="/WEB-INF/mybatis/jdbc.properties"/>
<!-- 引入配置文件 -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/WEB-INF/mybatis/jdbc.properties" />
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
<!-- 配置初始化大小、最小、最大 -->
<property name="initialSize" value="${initialSize}"></property>
<property name="minIdle" value="${minIdle}"/>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"></property>

</bean>

<!-- 配置sqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 数据库连接池 -->
<property name="dataSource" ref="dataSource"/>
<!-- 加载Mybatis全局配置文件 -->
<property name="configLocation" value="/WEB-INF/mybatis/mybatis-config.xml"/>
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="/WEB-INF/mybatis/mappers/*.xml" />
</bean>

<!-- 配置mybatis mapper接口 -->
<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.dao.UserMapper" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>

</beans>

4、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>
<!-- 配置别名 -->
<typeAliases>
<typeAlias type="com.dao.User" alias="User" />
</typeAliases>
</configuration>
5、usermapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dao.UserMapper">
<select id="getUser" parameterType="int" resultType="User">
select * from users where id = #{id}
</select>
<insert id="insert" flushCache="true" parameterType="User">
insert into users (id, name, age) values (
#{id}, #{name}, #{age}
)
</insert>
<!-- 对应userDao中的updateUser方法 -->
<update id="update" parameterType="User">
update users set name = #{name}, age = #{age} where id = #{id};
</update>

<!-- 对应userDao中的deleteUser 方法 -->
<delete id="delete" parameterType="int">
delete from users where id = #{id};
</delete>
</mapper>6、index-servet配置文件

<?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:p="http://www.springframework.org/schema/p"
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 http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 自动扫描的包名 -->
<context:component-scan base-package="com.controller,com.dao" />
<!-- 默认的注解映射的支持 -->
<mvc:annotation-driven />

<!-- 视图解释类 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/views/"/>
<property name="suffix" value=".html"/><!--可为空,方便实现自已的依据扩展名来选择视图解释类的逻辑  -->
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
</bean>

<mvc:resources mapping="/images/**" location="/images/" cache-period="31556926"/>
<mvc:resources mapping="/js/**" location="/js/" cache-period="31556926"/>
<mvc:resources mapping="/css/**" location="/css/" cache-period="31556926"/>
<mvc:resources mapping="/views/**" location="/views/" cache-period="31556926"/>

</beans>

7、UserMapper.java
public interface UserMapper {

public User getUser(int id);

public void insert(User user);

public void update(User user);

public void delete(int id);
}
user.java

public class User {
private int id;
private String name;
private int age;

private int test;
public User(int id, String name, int age) {
super();
this.id = id;
this.name = name;
this.age = age;
}

public User() {
super();
// TODO Auto-generated constructor stub
}
public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}
public String toString() {
return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
}

public int getTest() {
return test;
}

public void setTest(int test) {
this.test = test;
}

}

8、UserService.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService{

@Autowired
private UserMapper userMapper;

public void setUserMapper(UserMapper userMapper) {
this.userMapper = userMapper;
}

public User doGetUser(int id) {
return this.userMapper.getUser(id);
}
public void doInsertUser(User user) {
this.userMapper.insert(user);
}
public void doUpdateUser(User user) {
this.userMapper.update(user);
}
public void doDeleteUser(int id) {
this.userMapper.delete(id);
}
}

9、IndexController.java
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.dao.User;
import com.dao.UserService;

@Controller
public class IndexController {
@Autowired
private UserService userService;

private static Logger logger = Logger.getLogger(IndexController.class);

@RequestMapping({"/index","/"})
public String index() throws Exception{

User user1 = userService.doGetUser(7);
logger.info(user1.getName());
return "main";
}
}
10、测试显示
访问：http://localhost:8080/UI/index



从以上的显示中可以发现，从数据库中读取了数据。