springMVC demo搭建

1、使用idea新建一个基于maven的web项目，参考 http://www.cnblogs.com/winkey4986/p/5279820.html

2、采取了比较偷懒的配置方法，只配置了一个DispatcherServlet，注意区别同时配置DispatcherServlet和ContextLoaderListener

（从长远考虑是需要同时配置的，DispatcherServelet中主要扫描Controller，参考 http://www.cnblogs.com/winkey4986/p/5280138.html）

3、先配置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/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.icebean</groupId>

  <artifactId>chicken</artifactId>

  <packaging>war</packaging>

  <version>1.0-SNAPSHOT</version>

  <name>chicken Maven Webapp</name>

  <url>http://maven.apache.org</url>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

    <!--Spring-->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-webmvc</artifactId>

      <version>4.2.4.RELEASE</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-context</artifactId>

      <version>4.2.4.RELEASE</version>

    </dependency>

  </dependencies>

  <build>

    <plugins>

    <!--jetty-->

      <plugin>

        <groupId>org.mortbay.jetty</groupId>

        <artifactId>maven-jetty-plugin</artifactId>

        <version>6.1.6</version>

        <configuration>

          <connectors>

            <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">

              <port>9999</port>

              <maxIdleTime>60000</maxIdleTime>

            </connector>

          </connectors>

        </configuration>

      </plugin>

    </plugins>

    <finalName>chicken</finalName>

  </build>

</project>

pom中配置了 spring-webmvc、spring-context，另外插件中配置了jetty web容器，指定端口为9999

4、“偷懒配法”web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="3.1" 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">

    <display-name>chicken</display-name>

    <servlet>

        <servlet-name>SpringMVC</servlet-name>

        <servlet-class>

            org.springframework.web.servlet.DispatcherServlet

        </servlet-class>

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>classpath:applicationContext.xml</param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>SpringMVC</servlet-name>

        <url-pattern>/</url-pattern>

    </servlet-mapping>

    <welcome-file-list>

        <welcome-file>index.jsp</welcome-file>

    </welcome-file-list>

</web-app>

对于web.xml中指定的spring配置文件applicationContext.xml（此文件放在resources中）配置

<?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: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">

    <!-- 设置使用注解的类所在的jar包 -->

    <context:component-scan base-package="com.icebean"/>

</beans>

5、ok。配置文件好了，接下来是代码：

package com.icebean.demo;

/**

 * Created by ***on 2016/3/15.

 */

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

@Controller

public class HelloController {

    @RequestMapping("/hello")

    @ResponseBody

    public String test() {

        return "hello, world! This com from spring!";

    }

}

然后运行maven中的jetty插件，访问地址：http://localhost:9999/chicken/hello 搞定

总结一下：

1 创建一个标准的基于maven的web项目

2 两个maven依赖，spring-context；spring-mvc。maven就会自动下载所有关联的jar包，包括

spring-webmvc
spring-beans
spring-core
spring-expression
spring-web
spring-context
spring-aop
aopalliance
commons-logging

3 一个web.xml文件，配置了listener和servlet（可以只有一个DispatcherServelet）
4 两个spring相关的文件，applicationContext.xml和servletName-servlet.xml（可以只有一个applicationContext）
5 一个controller文件，配置了拦截的url处理代码

巴特西

springMVC demo搭建

总结一下：

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