SSM框架整合
Spring + Spring MVC + MyBatis
Spring MVC 负责实现 MVC 设计模式，MyBatis 负责数据持久层，Spring 负责管理 Spring MVC 和 MyBatis 相关对象的创建和依赖注入。
- 创建 Maven 工程，pom.xml
<dependencies><!-- SpringMVC --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.0.11.RELEASE</version></dependency><!-- Spring JDBC --><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.0.11.RELEASE</version></dependency><!-- Spring AOP --><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>5.0.11.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>5.0.11.RELEASE</version></dependency><!-- MyBatis --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.5</version></dependency><!-- MyBatis整合Spring --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.1</version></dependency><!-- MySQL驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.11</version></dependency><!-- C3P0 --><dependency><groupId>c3p0</groupId><artifactId>c3p0</artifactId><version>0.9.1.2</version></dependency><!-- JSTL --><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- ServletAPI --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.6</version><scope>provided</scope></dependency></dependencies><build><resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource><resource><directory>src/main/resources</directory><includes><include>*.xml</include><include>*.properties</include></includes></resource></resources></build>
- web.xml 中配置 SpringMVC、Spring、字符编码过滤器、加载静态资源。
<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app><display-name>Archetype Created Web Application</display-name><!-- 启动Spring --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- Spring MVC --><servlet><servlet-name>dispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping><!-- 字符编码过滤器 --><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><!-- 加载静态资源 --><servlet-mapping><servlet-name>default</servlet-name><url-pattern>*.js</url-pattern></servlet-mapping><servlet-mapping><servlet-name>default</servlet-name><url-pattern>*.css</url-pattern></servlet-mapping><servlet-mapping><servlet-name>default</servlet-name><url-pattern>*.jpg</url-pattern></servlet-mapping></web-app>
- 在 spring.xml 中配置 MyBatis 和 Spring 的整合。
<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
">
<!-- 整合MyBatis -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="root"></property>
<property name="password" value="root"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8"></property>
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
<property name="initialPoolSize" value="5"></property>
<property name="maxPoolSize" value="10"></property>
</bean>
<!-- 配置MyBatis SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="mapperLocations" value="classpath:com/southwind/repository/*.xml"></property>
<property name="configLocation" value="classpath:config.xml"></property>
</bean>
<!-- 扫描自定义的Mapper接口 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.southwind.repository"></property>
</bean>
</beans>
- config.xml 配置一些 MyBatis 辅助信息，比如打印 SQL 等。
<?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>
<!-- 打印SQL-->
<setting name="logImpl" value="STDOUT_LOGGING" />
</settings>
<typeAliases>
<!-- 指定一个包名，MyBatis会在包名下搜索需要的JavaBean-->
<package name="com.southwind.entity"/>
</typeAliases>
</configuration>
- 配置 springmvc.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"
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/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<!-- 启动注解驱动 -->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 扫描业务代码 -->
<context:component-scan base-package="com.southwind"></context:component-scan>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
- 实体类
package com.southwind.entity;
import lombok.Data;
@Data
public class User {
private long id;
private String name;
private String password;
private double score;
}
- UserRepository
package com.southwind.repository;
import com.southwind.entity.User;
import java.util.List;
public interface UserRepository {
public List<User> findAll();
}
- UserRepository.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.southwind.repository.UserRepository">
<select id="findAll" resultType="User">
select * from user
</select>
</mapper>
- UserService
package com.southwind.service;
import com.southwind.entity.User;
import java.util.List;
public interface UserService {
public List<User> findAll();
}
- UserServiceImpl
package com.southwind.service.impl;
import com.southwind.entity.User;
import com.southwind.repository.UserRepository;
import com.southwind.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserRepository userRepository;
@Override
public List<User> findAll() {
return userRepository.findAll();
}
}
- UserHandler
package com.southwind.controller;
import com.southwind.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/user")
public class UserHandler {
@Autowired
private UserService userService;
@GetMapping("/findAll")
public ModelAndView findAll(){
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("index");
modelAndView.addObject("list",userService.findAll());
return modelAndView;
}
}
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