之前复制粘贴创建了几个ssm的项目，然而回头让自己写的时候还是一头雾水，究其原因是spring的陌生。仅仅是写过几个helloworld而已。而且是照着写。我都不知道springmvc到底需要多少jar，都用来干嘛。所以，接下来要用心看spring原理了。
最近由于有定时任务的需求，简单搭建了一个springmvc4的helloworld。
ide采用的是idea，当然eclipse应该也是没问题的，因为都是maven项目。
1.创建好maven结构。
可以通过new->project->maven来创建。创建完后补充成正常的javaweb结构。即src\main\java,src\main\resource,src\main\webapp.
2.jar包--pom
关于jar包有多少，干啥用，还不清楚。这里是我在网上找的一个版本，很少jar，以后需要的时候逐渐增加就行了。
<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.test</groupId>
<artifactId>spmvtest</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>spmvtest Maven Webapp</name>
<url>http://maven.apache.org</url>
<!-- 设定主仓库，按设定顺序进行查找。 -->
<repositories>
<!-- 如有Nexus私服, 取消注释并指向正确的服务器地址.
<repository>
<id>nexus-repos</id>
<name>Team Nexus Repository</name>
<url>http://192.168.11.36:8888/nexus/content/groups/public</url>
</repository> -->
<repository>
<id>oschina-repos</id>
<name>Oschina Releases</name>
<url>http://maven.oschina.net/content/groups/public</url>
</repository>
<repository>
<id>java-repos</id>
<name>Java Repository</name>
<url>http://download.java.net/maven/2/</url>
</repository>
<repository>
<id>springsource-repos</id>
<name>SpringSource Repository</name>
<url>http://repo.spring.io/release/</url>
</repository>
<repository>
<id>central-repos</id>
<name>Central Repository</name>
<url>http://repo.maven.apache.org/maven2</url>
</repository>
<repository>
<id>central-repos2</id>
<name>Central Repository 2</name>
<url>http://repo1.maven.org/maven2/</url>
</repository>
</repositories>
<!-- 设定插件仓库 -->
<pluginRepositories>
<!-- 如有Nexus私服, 取消注释并指向正确的服务器地址.
<pluginRepository>
<id>nexus-repos</id>
<name>Team Nexus Repository</name>
<url>http://192.168.11.36:8888/nexus/content/groups/public</url>
</pluginRepository> -->
<pluginRepository>
<id>oschina-repos</id>
<name>Oschina Releases</name>
<url>http://maven.oschina.net/content/groups/public</url>
</pluginRepository>
</pluginRepositories>
<properties>
<spring.version>4.0.8.RELEASE</spring.version>
<quartz.version>2.2.1</quartz.version>
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!--springmvc begin-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!--springmvc end-->
<!--quartz-->
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>${quartz.version}</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- log start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- log end -->
</dependencies>
<build>
<finalName>spmvtest</finalName>
</build>
</project>
3.web.xml
设置拦截器和过滤器
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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_3_0.xsd"
version="3.0">
<!-- 加载spring容器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- springmvc前端控制器，rest配置 -->
<servlet>
<servlet-name>springmvc_rest</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:spring/spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc_rest</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- post乱码过虑器 -->
<filter>
<filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--静态资源直接访问-->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.ico</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.png</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.jpg</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
</web-app>
4.spring容器配置文件spring/spring-contex.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:task="http://www.springframework.org/schema/task"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.test"/>
<!-- 计划任务配置，用 @Service @Lazy(false)标注类，用@Scheduled(cron = "0 0 2 * * ?")标注方法 -->
<task:executor id="executor" pool-size="10"/> <task:scheduler id="scheduler" pool-size="10"/>
<task:annotation-driven scheduler="scheduler" executor="executor" proxy-target-class="true"/>
</beans>
5.dispatcherServlet配置文件spring/spring-mvc.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.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">
<context:component-scan base-package="com.test"/>
<mvc:annotation-driven/>
<bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
6.helloController测试
package com.test.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* Created by Administrator on 2016/4/14 0014.
*/
@Controller
public class HelloController {
@RequestMapping("/index")
public String index(ModelMap modelMap){
modelMap.put("username", "Ryan miao");
return "index";
}
}
7.视图：/web-inf/views/index.jsp
<html>
<body>
<h2>Hello World!</h2>
hello ${username}
</body>
</html>
8.定时任务task
package com.test.task;
import org.springframework.context.annotation.Lazy;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
/**
* Created by Administrator on 2016/4/14 0014.
*/
@Service
@Lazy(false)
public class MyTask implements ITask {
private static int i = 0;
private static int y = 0;
@Scheduled(cron="0/5 * * * * ?") //每5秒执行一次
public void testCyc() {
System.out.println("task test,执行次数："+i++);
}
/**
* 心跳更新。启动时执行一次，之后每隔2秒执行一次
*/
@Scheduled(fixedRate = 1000*2)
public void print(){
System.out.println("心跳执行次数："+y++);
}
}
9.测试代码：github
唯有不断学习方能改变！ -- Ryan Miao
