SpringMVC 简介以及构建（二：精简版）

四、视图解释器

配置以后返回内容可以精简,在spring mvc 配置文件里面加

<!-- 视图 解释器 -->
<bean id="viewResolver"
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass">
        <value>org.springframework.web.servlet.view.JstlView</value>
    </property>
        <!--前缀 -->
    <property name="prefix">
        <value>/</value>
    </property>
        <!--后缀 -->
    <property name="suffix">
        <value>.jsp</value>
    </property>
</bean>

五、spring mvc 注解

1.新建一个web maven工程
2.在pom.xml加如下配置

<dependencies>
    <!-- 引入web工程所需的依赖 -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.2</version>
        <scope>provided</scope>
    </dependency>
    <!-- 添加JSTL标签库 -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    <dependency>
        <groupId>taglibs</groupId>
        <artifactId>standard</artifactId>
        <version>1.1.2</version>
    </dependency>
    <!-- 整合SpringMVC会自动引入其他所需的spring核心依赖 -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.3.7.RELEASE</version>
    </dependency>

</dependencies>
<build>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <encoding>UTF-8</encoding>
            </configuration>
        </plugin>
    </plugins>
</build>

3.把web.xml改为如下配置

 <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
         http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    version="3.1">

    <!--字符集过滤器 -->
    <filter>
        <filter-name>Encoding</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>Encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <!-- spring核心控制器 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- contextConfigLocation配置springmvc加载的配置文件（配置处理器映射器、适配器等等） 如果不配置contextConfigLocation，默认加载的是/WEB-INF/servlet名称-serlvet.xml（springmvc-servlet.xml） -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <!-- 第一种：*.do/action，访问以.action结尾 由DispatcherServlet进行解析 第二种：/，所以访问的地址都由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  -->
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

4.加入springmvc配置文件

<beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xmlns:p="http://www.springframework.org/schema/p" 
         xmlns:context="http://www.springframework.org/schema/context" 
         xmlns:util="http://www.springframework.org/schema/util" 
         xmlns:mvc="http://www.springframework.org/schema/mvc"
         xsi:schemaLocation="http://www.springframework.org/schema/beans 
            http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
            http://www.springframework.org/schema/context 
            http://www.springframework.org/schema/context/spring-context-4.3.xsd
            http://www.springframework.org/schema/util 
            http://www.springframework.org/schema/util/spring-util-4.3.xsd
            http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
    <!-- 默认扫描的包路径 -->
    <context:component-scan base-package="com.chair.controller" />
    <!-- 添加注解驱动 -->
    <mvc:annotation-driven />
    <!-- 视图 解释器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass">
            <value>org.springframework.web.servlet.view.JstlView</value>
        </property>
        <!--前缀 -->
        <property name="prefix">
            <value>/</value>
        </property>
        <!--后缀 -->
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>
</beans>

5.新建一个Contrller类，并且在该类添加@Controller
6.写测试代码