springmvc最新教程

发布日期: 2020-05-02

作者: 欧阳思海

文章字数: 1.7k

阅读时长: 9 分

阅读次数:

本人花费半年的时间总结的《Java面试指南》已拿腾讯等大厂offer，已开源在github ，欢迎star！

本文GitHub https://github.com/OUYANGSIHAI/JavaInterview 已收录，这是我花了6个月总结的一线大厂Java面试总结，本人已拿大厂offer，欢迎star

原文链接：blog.ouyangsihai.cn >> springmvc教程：整合mybatis开发（spring+springMVC+mybatis整合开发）

一、整合mybatis

为了更好的学习 springmvc和mybatis整合开发的方法，需要将springmvc和mybatis进行整合。

整合目标：控制层采用springmvc、持久层使用mybatis实现。

1.1 需求

实现商品查询列表，从mysql数据库查询商品信息。

1.2 jar包

包括：spring（包括springmvc）、mybatis、mybatis-spring整合包、数据库驱动、第三方连接池。

1.3 Dao

目标：

1、spring管理SqlSessionFactory、mapper

详细参考mybatis教程与spring整合章节。

1.3.1 sqlMapConfig.xml

在classpath下创建mybatis/sqlMapConfig.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>


    <null>

        <mappers>

            <package name="com.sihai.ssm.mapper" />

        </mappers>

</configuration>

1.3.2 applicationContext-dao.xml

配置数据源、事务管理，配置SqlSessionFactory、mapper扫描器。


<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 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-3.2.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.2.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

    <!-- 加载配置文件 -->

    <context:property-placeholder location="classpath:db.properties" />

    <!-- 数据库连接池 -->

    <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.username}" />

        <property name="password" value="${jdbc.password}" />

        <property name="maxActive" value="30" />

        <property name="maxIdle" value="5" />

    </bean>


    <!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

        <!-- 数据库连接池 -->

        <property name="dataSource" ref="dataSource" />

        <!-- 加载mybatis的全局配置文件 -->

        <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />

    </bean>

    <!-- mapper扫描器 -->

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

        <property name="basePackage" value="com.sihai.springmvc.mapper"></property>

        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />

    </bean>


</beans>

1.3.3 ItemsMapper.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.sihai.ssm.mapper.ItemsMapper">

    <!-- sql片段 -->

    <!-- 商品查询条件 -->

    <sql id="query_items_where">

        <if test="items!=null">

            <if test="items.name!=null and items.name!=''">

and items.name like '%${items.name}%'

</if>

        </if>

    </sql>


    <!-- 查询商品信息 -->

    <select id="findItemsList" parameterType="queryVo" resultType="items">
        select * from items
        <where>

            <include refid="query_items_where" />

        </where>

    </select>


</mapper>

1.3.4 ItemsMapper.java



public interface ItemsMapper {

  //商品列表

  public List<Items> findItemsList(QueryVo queryVo) throws Exception;

}

1.4 Service

1、Service由spring管理

2、spring对Service进行事务控制。

1.4.1 applicationContext-service.xml

配置service接口。

1.4.2 applicationContext-transaction.xml

配置事务管理器。


<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 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-3.2.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.2.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">


    <!-- 事务管理器 -->

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

        <!-- 数据源 -->

        <property name="dataSource" ref="dataSource" />

    </bean>


    <!-- 通知 -->

    <tx:advice id="txAdvice" transaction-manager="transactionManager">

        <tx:attributes>

            <!-- 传播行为 -->

            <tx:method name="save*" propagation="REQUIRED" />

            <tx:method name="insert*" propagation="REQUIRED" />

            <tx:method name="delete*" propagation="REQUIRED" />

            <tx:method name="update*" propagation="REQUIRED" />

            <tx:method name="find*" propagation="SUPPORTS" read-only="true" />

            <tx:method name="get*" propagation="SUPPORTS" read-only="true" />

        </tx:attributes>

    </tx:advice>


    <!-- 切面 -->

    <aop:config>

        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.sihai.springmvc.service.impl.*.*(..))" />

    </aop:config>


</beans>

1.4.3 OrderService


public interface OrderService {

    // 商品查询列表

    public List<Items> findItemsList(QueryVo queryVo) throws Exception;

    }

    @Autowired
    
    private ItemsMapper itemsMapper;

    @Override
    
    public List<Items> findItemsList(QueryVo queryVo) throws Exception {
    
    //查询商品信息
    
    return itemsMapper.findItemsList(queryVo);
    
    }

}

1.5 Action

1.5.1 springmvc.xml


<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 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-3.2.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.2.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

    <!-- 扫描controller注解,多个包中间使用半角逗号分隔 -->

    <context:component-scan base-package="com.sihai.ssm.controller" />

    <!--注解映射器 -->

    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />

    <!--注解适配器 -->

    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" />

    <!-- ViewResolver -->

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />

        <property name="prefix" value="/WEB-INF/jsp/" />

        <property name="suffix" value=".jsp" />

    </bean>


</beans>

1.5.2 web.xml

加载spring容器，配置springmvc前置控制器。


<?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>springmvc</display-name>


    <!-- 加载spring容器 -->

    <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>/WEB-INF/classes/spring/applicationContext.xml,/WEB-INF/classes/spring/applicationContext-*.xml</param-value>

    </context-param>

    <listener>

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>


    <!-- 解决post乱码 -->

    <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>


    <!-- springmvc的前端控制器 -->

    <servlet>

        <servlet-name>springmvc</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <!-- contextConfigLocation不是必须的， 如果不配置contextConfigLocation， springmvc的配置文件默认在：WEB-INF/servlet的name+"-servlet.xml" -->

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>classpath:spring/springmvc.xml</param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>springmvc</servlet-name>

        <url-pattern>*.action</url-pattern>

    </servlet-mapping>


    <welcome-file-list>

        <welcome-file>index.html</welcome-file>

        <welcome-file>index.htm</welcome-file>

        <welcome-file>index.jsp</welcome-file>

        <welcome-file>default.html</welcome-file>

        <welcome-file>default.htm</welcome-file>

        <welcome-file>default.jsp</welcome-file>

    </welcome-file-list>

</web-app>

1.5.3 OrderController


@Controller

public class OrderController {

    @Autowired

    private OrderService orderService;

    @RequestMapping("/queryItem.action")

    public ModelAndView queryItem() throws Exception {

        // 商品列表

        List<Items> itemsList = orderService.findItemsList(null);

        // 创建modelAndView准备填充数据、设置视图

        ModelAndView modelAndView = new ModelAndView();

        // 填充数据

        modelAndView.addObject("itemsList", itemsList);

        // 视图

        modelAndView.setViewName("order/itemsList");

        return modelAndView;

    }

}

1.6 测试

http://localhost:8080/springmvc_mybatis/queryItem.action

本人花费半年的时间总结的《Java面试指南》已拿腾讯等大厂offer，已开源在github ，欢迎star！

本文GitHub https://github.com/OUYANGSIHAI/JavaInterview 已收录，这是我花了6个月总结的一线大厂Java面试总结，本人已拿大厂offer，欢迎star

原文链接：blog.ouyangsihai.cn >> springmvc教程：整合mybatis开发（spring+springMVC+mybatis整合开发）