SpringMVC配置

Spring mvc 配置

1、導入jar包
2、配置web.xml

<servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       <!-- 配置 DispatcherServlet 的一個初始化參數: 配置 SpringMVC 配置文件的位置和名稱 -->
        <!-- 
            實際上也可以不通過 contextConfigLocation 來配置 SpringMVC 的配置文件, 而使用默認的.
            默認的配置文件爲: /WEB-INF/<servlet-name>-servlet.xml
        -->
        <!--  src路徑下
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        -->
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

3、配置dispatcherServlet-servlet.xml

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-4.0.xsd 
                        http://www.springframework.org/schema/mvc 
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd 
                        http://www.springframework.org/schema/context 
                        http://www.springframework.org/schema/context/spring-context-4.0.xsd 
                        http://www.springframework.org/schema/aop 
                        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd 
                        http://www.springframework.org/schema/tx 
                        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"
<!-- 設置使用註解的類所在的jar包 -->
    <context:component-scan base-package="cn.springmvc" />
<!-- 配置視圖解析器: 如何把 handler 方法返回值解析爲實際的物理視圖 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

4、代碼示例


@Controller
public class HelloWorld {
/**
* 1.使用 requestMapping 註解映射請求URL
* 2.返回值會通過視圖解析器解析爲實際的物理視圖，對於InternalResourceViewResolver 視圖解析器，會做一下解析
*通過 prefix + return + 後綴 這樣的方式得到實際的物理視圖，然後轉發
* @return
*/
@RequestMapping("/helloworld")
public String hello(){
System.out.println("Hello world!");
return "success";
}
}