参考 B 站楠哥教你学 Java的【极简上手】1 小时学会 SSM 框架整合视频
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。
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| <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.0.11.RELEASE</version> </dependency>
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.0.11.RELEASE</version> </dependency>
<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>
<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.5</version> </dependency>
<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency>
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.11</version> </dependency>
<dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> </dependency>
<dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency>
<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>
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- web.xml 中配置 SpringMVC、Spring、字符编码过滤器、加载静态资源。
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| <!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> <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>
<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>
<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>
<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>
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- 在 spring.xml 中配置 MyBatis 和 Spring 的整合。
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| <?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 ">
<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>
<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>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.southwind.repository"></property> </bean>
</beans>
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- config.xml 配置一些 MyBatis 辅助信息,比如打印 SQL 等。
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| <?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> <setting name="logImpl" value="STDOUT_LOGGING" /> </settings>
<typeAliases> <package name="com.southwind.entity"/> </typeAliases>
</configuration>
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| <?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">
<mvc:annotation-driven></mvc:annotation-driven>
<context:component-scan base-package="com.southwind"></context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean>
</beans>
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| package com.southwind.entity; import lombok.Data;
@Data public class User { private long id; private String name; private String password; private double score; }
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| package com.southwind.repository; import com.southwind.entity.User; import java.util.List;
public interface UserRepository { public List<User> findAll(); }
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| <?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>
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| package com.southwind.service;
import com.southwind.entity.User;
import java.util.List;
public interface UserService { public List<User> findAll(); }
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| 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(); } }
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| 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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| <%-- Created by IntelliJ IDEA. User: southwind Date: 2019-03-21 Time: 09:55 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ page isELIgnored="false" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head> <title>Title</title> </head> <body> <c:forEach items="${list}" var="user"> ${user.id}--${user.name}--${user.score}<br/> </c:forEach> </body> </html>
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