First, the basic environment preparation
1. Create a Java Web project and introduce dependent jars
commons-logging-1.1.jar
mybatis-3.3.0.jar
mybatis-spring-1.2.4.jar
mysql-connector-java-5.0.2.jar
spring-aop-4.3.2.RELEASE.jar
spring-beans-4.3.2.RELEASE.jar
spring-context-4.3.2.RELEASE.jar
spring-context-support-4.3.2.RELEASE.jar
spring-core-4.3.2.RELEASE.jar
spring-expression-4.3.2.RELEASE.jar
spring-jdbc-4.3.2.RELEASE.jar
spring-tx-4.3.2.RELEASE.jar
spring-web-3.2.4.RELEASE.jar
spring-webmvc-3.2.4.RELEASE.jar
2. Create the database coredb in mysql and create the test table user
SET FOREIGN_KEY_CHECKS=0;
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`userName` varchar(50) DEFAULT NULL,
`password` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
INSERT INTO `user` VALUES ('1', 'tuozixuan', '111111');
2. Write sample code
1. Create several packages
com.tuozixuan.one.controller
com.tuozixuan.one.service
com.tuozixuan.one.service.impl
com.tuozixuan.one.mapper
com.tuozixuan.one.model
2. Write sample code
#############UserController#############
package com.tuozixuan.one.controller;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.tuozixuan.one.service.UserService;
@Controller
public class UserController
{
@Resource
private UserService userService;
@RequestMapping("/getUser")
public ModelAndView hello()
{
System.out.println("getUser start");
userService.getUser();
System.out.println("getUser end");
ModelAndView mv = new ModelAndView("user");
return mv;
}
}
#############UserService#############
package com.tuozixuan.one.service;
import com.tuozixuan.one.model.UserModel;
public interface UserService
{
UserModel getUser();
}
#############UserServiceImpl#############
package com.tuozixuan.one.service.impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.tuozixuan.one.mapper.UserMapper;
import com.tuozixuan.one.model.UserModel;
import com.tuozixuan.one.service.UserService;
@Service
public class UserServiceImpl implements UserService
{
@Resource
private UserMapper userMapper;
public UserModel getUser()
{
List<UserModel> userList = userMapper.getUser();
if (userList.size() > 0)
{
System.out.println("user:" + userList.get(0).getUserName());
}
return null;
}
}
#############UserMapper#############
package com.tuozixuan.one.mapper;
import java.util.List;
import com.tuozixuan.one.model.UserModel;
public interface UserMapper
{
List<UserModel> getUser();
}
#############UserModel#############
package com.tuozixuan.one.model;
public class UserModel
{
private String userName;
public String getUserName()
{
return userName;
}
public void setUserName(String userName)
{
this.userName = userName;
}
}
#############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.tuozixuan.one.mapper.UserMapper">
<select id="getUser" resultType="com.tuozixuan.one.model.UserModel">
SELECT * FROM user
</select>
</mapper>
#############user.jsp#############
Create user.jsp under WebRoot with arbitrary content
3. SSM integration configuration file
1. The web.xml configuration is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- spring configuration file-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<!-- Spring listening -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring MVC configuration-->
<servlet>
<servlet-name>springMvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springMvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
2. Create a new spring-mvc.xml configuration file in the src directory
<?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" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:util="http://www.springframework.org/schema/util" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
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
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">
<!-- Annotation-driven -->
<mvc:annotation-driven />
<!-- Scan all classes in the controller package to complete the functions of Bean creation and automatic dependency injection-->
<context:component-scan base-package="com.tuozixuan.one"/>
<!-- Start the annotation function of Spring MVC and complete the mapping of requests and annotation POJOs -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<!--View resolver-->
<bean id="viewResolverCommon" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
3. Create a new spring.xml configuration file in the src directory
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:cache="http://www.springframework.org/schema/cache "
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.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
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache-4.1.xsd ">
<!-- Data source configuration -->
<bean id="jdbcDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.gjt.mm.mysql.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/coredb?useUnicode=true&characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="password"/>
</bean>
<!-- mybatis file configuration, scan all mapper files -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="jdbcDataSource"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<property name="mapperLocations" value="classpath:com/tuozixuan/one/mapper/*.xml"></property>
</bean>
<!-- Spring and mybatis integrated configuration, scan all dao -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.tuozixuan.one.mapper" ></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" ></property>
</bean>
</beans>
4. Create a new mybatis-config.xml configuration file in the src directory
<?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> </configuration>
4. Operation and Results
1. Deploy the web project to tomcat, visit http://localhost:8080/one/getUser in the browser, find that you can access user.jsp, and print out the log content on the console:
getUser start
user:tuozixuan
getUser end