SpringMVC 简单实例

简单的SpringMVC 实例

写了个简单的SpringMVC 实例，简单的传参

• 架包导入
  我们发现各个spring版本的下载地址： http://repo.spring.io/release/org/springframework/spring

  可以在这里下载SpringMVC 的架包

  首先需要将jar包导入WEB-INF下的lib目录下

  解压下载的架包，进入目录spring-framework-4.2.5.RELEASE\libs ，将此目录下的以“.RELEASE.jar”结尾的jar包都导入，除此之外还需要一个commons-logging-1.1.3.jar架包

• web.xml
  如果不用

<init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:com/feizi/config/springmvc-servlet.xml</param-value>
    </init-param>

规定SpringMVC xml配置文件的路径则默认是在/WEB-INF/下

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">


  <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 加载/WEB-INF/[servlet-name]-servlet.xml -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

• springMVC-servlet.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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <!-- 启用spring mvc 注解 -->
    <context:annotation-config />

    <!-- 设置使用注解的类所在的jar包 -->
    <context:component-scan base-package="com.myp.controller"></context:component-scan>


    <!-- 对转向页面的路径解析。prefix：前缀， suffix：后缀   如：http://127.0.0.1:8080/springmvc/WEB-INF/jsp/****.jsp-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"></bean>
</beans>

• controller

package com.myp.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HelloController {
//name 是入参 在请求 /hello?name=hello 时即可获得参数 ，可不加参数，若参数必须则可以加上注解 @requestParam 默认required=true 必须传参数，否则404错误
//model 出参 是传入给jsp的对象

    @RequestMapping(value="/hello")
      public String Dohello(String name,Model model){
          System.out.println("running...");
          model.addAttribute("hello","hello");
          return "hello";//WEB-INF/jsp/hello.jsp
      }
}

• hello.jsp

 This is my JSP page ${hello }

• 效果