转：http://lifeneveralone.diandian.com/post/2012-11-02/40042292065
本文介绍使用spring mvc结合Mybatis搭建一个应用程序框架.
demo源码下载：springMVC-Mybatis
1.准备工作：
spring的jar包：
spring-beans-3.1.0.RELEASE.jar
spring-core-3.1.0.RELEASE.jar
spring-web-3.1.0.RELEASE.jar
spring-webmvc-3.1.0.RELEASE.jar
spring-context-3.1.0.RELEASE.jar
spring-expression-3.1.0.RELEASE.jar
spring-aop-3.1.0.RELEASE.jar
spring-asm-3.1.0.RELEASE.jar
spring-context-support-3.1.0.RELEASE.jar
mybatis与Spring的整合所需的包:
mysql-connector-java-5.1.21-bin.jar
mybatis-spring-1.1.1.jar
mybatis-3.1.1.jar
JDBC驱动：
mysql-connector-java-3.1.6-bin.jar
公共jar包：
commons-dbcp-1.4.jar
commons-io-2.0.1.jar
commons-logging-1.1.1.jar
commons-pool-1.6.jar
hibernate-validator-4.1.0.Final.jar
slf4j-api-1.6.1.jar
slf4j-log4j12-1.6.1.jar
log4j-1.2.16.jar
2.web.xml配置
<?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_3_0.xsd" version="3.0">
<display-name>shop</display-name>
<!-- log4j配置初始化 -->
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>WEB-INF/log4j/log4j.properties</param-value>
</context-param>
<!-- log4j的配置每分钟刷新一次，这样在后续定位问题是修改日志配置后不需要重启系统 -->
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>60000</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.util.Log4jConfigListener
</listener-class>
</listener>
<!-- spring配置初始化 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/*-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring MVC配置，配置分发器 -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 配置欢迎界面 -->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
3.spring mvc的配置servlet-context.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- DispatcherServlet Context: defines this servlet‘s request-processing infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<context:annotation-config />
<context:component-scan base-package="com.huawei.shop.controller" />
<!-- Handles HTTP GET requests for
/resources/** by efficiently serving up static resources in the
${webappRoot}/resources directory -->
<resources mapping="/js/**" location="/js/" />
<resources mapping="/css/**" location="/css/" />
<resources mapping="/images/**" location="/images/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/jsp/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<!-- Imports user-defined @Controller beans that process client requests -->
<!--
<beans:import resource="controllers.xml" />
-->
</beans:beans>
4.Mybatis-spring的配置：mybatis-context.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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd"
>
<!-- enable autowire -->
<context:annotation-config />
<context:component-scan base-package="com.huawei.shop.*" />
<!--配置jdbc.properties文件的位置信息，路径还是区分大小写 -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="WEB-INF/jdbc/jdbc.properties" />
</bean>
<!-- 读取jdbc.properties文件，配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.user}" />
<property name="password" value="${jdbc.password}" />
<!-- 数据库连接池配置 -->
<property name="initialSize" value="${jdbc.initialPoolSize}" />
<!-- 初始化连接数量 -->
<property name="maxActive" value="${jdbc.maxPoolSize}" />
<!-- 最大连接数量 -->
<property name="maxIdle" value="${jdbc.maxIdlePollSize}" />
<!-- 最大空闲连接数量 -->
<property name="minIdle" value="${jdbc.mixIdlePollSize}" />
<!-- 最小空闲连接数量 -->
</bean>
<!-- sqlSessionFactory --><!-- MyBatis在spring中Bean的配置，都是固定的 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="WEB-INF/mybatis/Mybatis-Configuration.xml" />
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations">
<list>
<value>WEB-INF/mybatis/*Mapper.xml</value>
</list>
</property>
<property name="typeAliasesPackage" value="com.huawei.shop.model" />
</bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory" />
</bean>
<!--
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.huawei.shop.repository" />
</bean>
-->
<!-- scan for mappers and let them be autowired -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.huawei.shop.repository" />
</bean>
</beans>
5.Mybatis的配置：Mybatis-Configuration.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>
<!-- 全局的映射器启用或禁用缓存。 -->
<setting name="cacheEnabled" value="true" />
<!-- 全局启用或禁用延迟加载 -->
<setting name="lazyLoadingEnabled" value="true" />
<!-- 允许或不允许多种结果集从一个单独的语句中返回 -->
<setting name="multipleResultSetsEnabled" value="true" />
<!-- 设置超时时间 -->
<setting name="defaultStatementTimeout" value="25000" />
</settings>
<!--
<typeAliases>
<typeAlias alias="AdminTable" type="com.huawei.shop.model.AdminTable"/>
</typeAliases>
-->
<!-- 对应vo类的DAO接口 所对应的xml配置文件的路径信息 -->
<!--
<mappers>
<mapper resource="AdminTable.xml" />
</mappers>
-->
</configuration>
6.jdbc的配置：jdbc.properties：
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/cop?useUnicode=true&characterEncoding=UTF-8
jdbc.user=root
jdbc.password=root
jdbc.initialPoolSize=10
jdbc.maxPoolSize=50
jdbc.maxIdlePollSize=50
jdbc.mixIdlePollSize=10
log4j的配置就不贴了，到目前为止，我们大致完成了spring mvc + mybatis的框架的所有配置文件。为了有效减少配置文件，我们使用了spring的annotation。实践证明，基于annotation的 spring mvc + mybatis的框架是可以做到后续的开发零配置，但是个人觉得，为了有效管理Mybatis的sql语句（这些是在我们开发过程中可能会不停的修改的。 而spring的配置一般是一次配置，后续就会很少修改），我们将sql语句使用了映射文件，而不是以注释方式写在代码里面。
下面，我们来看具体的代码实践。本demo实现了从页面输入一个用户名和密码，到数据库校验密码是否正确的功能，一个简单的登录流程。
1.login.jsp,主要实现了一个表单提交的功能:
<div>
<form id="login" name="login" action="login" method="post">
<table>
<tr>
<td>用户名</td>
<td><input id="name" name="name" type="text" /></td>
</tr>
<tr>
<td>密码</td>
<td><input id="password" name="password" type="password" /></td>
</tr>
<tr>
<td><input value="登录" type="submit" onclick="disp_alert()"/></td>
</tr>
</table>
</form>
</div>
2.LoginController.java
package com.huawei.shop.controller;
import java.util.List;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.huawei.shop.model.AdminTable;
import com.huawei.shop.model.ConfigTable;
import com.huawei.shop.service.AdminService;
import com.huawei.shop.service.ConfigService;
@Controller
public class LoginController
{
private static final Logger logger = Logger.getLogger("DEBUG");
@Autowired
private AdminService adminService;
@Autowired
private ConfigService configService;
@RequestMapping(value = "/login", method = RequestMethod.POST)
public String login(String name, String password, Model model)
{
logger.error("name = "+name);
AdminTable admin = adminService.getUserPassword(name);
List<ConfigTable> configs = configService.getAllConfig();
String passwd = admin.getPassword();
model.addAttribute("admin", admin);
model.addAttribute("name", name);
model.addAttribute("password", password);
model.addAttribute("configs", configs);
if (passwd.equals(password))
{
return "home";
}
return "error";
}
}
3.AdminService.java
package com.huawei.shop.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.huawei.shop.model.AdminTable;
import com.huawei.shop.repository.AdminMapper;
@Service
public class AdminService
{
@Autowired
private AdminMapper adminMapper;
public AdminTable getUserPassword(String name) {
return adminMapper.getUserPassword(name);
}
}
4.AdminMapper.java
package com.huawei.shop.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.huawei.shop.model.AdminTable;
import com.huawei.shop.repository.AdminMapper;
@Service
public class AdminService
{
@Autowired
private AdminMapper adminMapper;
public AdminTable getUserPassword(String name) {
return adminMapper.getUserPassword(name);
}
}
5.AdminTable.java
package com.huawei.shop.model;
public class AdminTable
{
private String name;
private String password;
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this.password = password;
}
}
6.AdminTable-Mapper.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.huawei.shop.repository.AdminMapper">
<resultMap id="AdminMap" type="AdminTable" >
<id property="name" column="AD_NAME"></id>
<id property="password" column="AD_PASSWORD"></id>
</resultMap>
<select id="getUserPassword" parameterType="String" resultMap="AdminMap"> select
AD_NAME, AD_PASSWORD from ADMIN where AD_NAME=#{name} </select>
</mapper>