SpringMVC的HelloWord

SpringMVC的（helloWord）

1、导入jar包

2、创建spring和springMVC的xml文件

3、在web.xml中配置spring的监听器和核心servlet和位置

下面详细说每个步骤

1、新建一个web工程demoapp

2、在web-INF/lib下导入spring的jar

3、spring的xml,只需要写一个helloword的话只需要配置一个扫描包就可以啦（spring-config.xml）

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:task="http://www.springframework.org/schema/task"
 
       xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
 
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
       http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd
       ">
 
       <!-- 配置扫描包 -->
      <context:annotation-config />
      <context:component-scan base-package = "com.demo"/><!--
</beans>

4、管理springmvc的xml(application.xml)

<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"
    xmlns:oxm="http://www.springframework.org/schema/oxm"
    xsi:schemaLocation="
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util-4.1.xsd
        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-4.1.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/oxm
            http://www.springframework.org/schema/oxm/spring-oxm.xsd
       " >
    <!-- 扫描包 -->
  <context:component-scan base-package ="com.demo.**.controller" >
       <context:include-filter type = "annotation" expression ="org.springframework.stereotype.Controller" />
  </context:component-scan >
 
  <!-- 默认的视图解析器- -->
    <bean  class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
 
</beans>

3、在web.xml中配置spring

<!-- Spring配置文件 start  -->
      <context-param>
            <param-name>contextConfigLocation</param-name>
             <param-value>classpath:spring-*.xml</param-value>
            <!-- <param-value>classpath:spring-config.xml;classpath:spring-redis.xml;</param-value> -->
      </context-param>
 
      <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
 
      <servlet>
            <servlet-name>spring</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                  <param-name>contextConfigLocation</param-name>
                  <param-value>classpath:application.xml</param-value>
            </init-param>
      </servlet>
      <servlet-mapping>
            <servlet-name>spring</servlet-name>
            <url-pattern>/</url-pattern>
      </servlet-mapping>
       <!-- Spring配置文件 end  -->

spring的监听器--->context|LoaderListener，核心的servlet-->dispatcherServlet

5、新建一个类，TestController，在对应的方法上面加上@requestMapping（“路径”）

必须创建在controller包下面，因为在application.xml中配置的扫描包

@Controller
public class TestController {
 
      @RequestMapping("/hello")
      public String hello(){
            System.out.println("hello this is hello method");
            return "hello";
      }
}

6、在页面上使用相应的路径就可以啦

 <a href="<%=path %>/hello">hello springMVC</a>