(二)SpringMVC+mybatis实践

一、需求

以案例作为驱动

springmvc和mybatis使用一个案例（商品订单管理系统）

功能需求：商品的列表查询

二、环境准备

数据库环境

Java环境

jdk1.8

eclipse

springmvc版本 spring3.2

需要spring3.2所有jar包（一定包含spring-webmvc-3.2.0.RELEASE.jar）

POM.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>springmvc</groupId>
	<artifactId>springmvc</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<properties>
		<spring-version>5.1.8.RELEASE</spring-version>
	</properties>
	<build>
		<sourceDirectory>src</sourceDirectory>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.1</version>
				<configuration>
					<source>1.7</source>
					<target>1.7</target>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-war-plugin</artifactId>
				<version>2.3</version>
				<configuration>
					<warSourceDirectory>WebRoot</warSourceDirectory>
					<failOnMissingWebXml>false</failOnMissingWebXml>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-war-plugin</artifactId>
				<version>2.3</version>
				<configuration>
					<warSourceDirectory>WebRoot</warSourceDirectory>
					<failOnMissingWebXml>false</failOnMissingWebXml>
				</configuration>
			</plugin>
		</plugins>
	</build>

	<dependencies>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${spring-version}</version>
</dependency>

		<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring-version}</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring-version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring-version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring-version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${spring-version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring-version}</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${spring-version}</version>
			<scope>test</scope>
		</dependency>

		<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl-api -->
		<dependency>
			<groupId>javax.servlet.jsp.jstl</groupId>
			<artifactId>jstl-api</artifactId>
			<version>1.2</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.2</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/junit/junit -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.2</version>
			<scope>test</scope>
		</dependency>

	</dependencies>
</project>

　　三、配置前端控制器

<!-- springmvc前端控制器-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <!-- contextConfigLocation配置springmvcc加载的配置文件，处理器映射器、适配器等等
         如果不配置contextConfigLocation 默认加载、WEB-INF/servlet名称servlet.xml (spring-servlet.xml)-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
    </servlet>

  <!-- springmvc 映射器-->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <!--
    第一种 *.action，访问以。action结尾的由Dispatcherservlet进行解析；
    第二种：/,所有访问的地址都由Dispatcherservlet进行解析，对于静态文件的解析需要配置不让Dispatcherservlet进行解析，
    使用此种方式可以实现RESTful风格的url
    第三种：/*,这样配置不对，使用这种配置，最终要转发到一个jsp页面时，仍然会有Dispatcherservlet解析jsp地址，不能根据jsp页面找到handler,会报错。
     -->
        <url-pattern>*.action</url-pattern>>
    </servlet-mapping>>

　　四、配置处理器映射器

在classpath下的springmvc.xml中配置处理器映射器

五、配置处理器适配器

在classpath下的springmvc.xml中配置处理器适配器

通过查看原码：

此适配器能执行实现contraller接口的handler

开发Handler

需要实现controller接口，才能由org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter适配器执行

六、配置视图解析器