今天写一个springMVC的入门日志，使用spring4.1.6。
加入maven依赖，pom.xml如下：
<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</groupId> <artifactId>springmvc</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>springmvc 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> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.6.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.1.6.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.1.6.RELEASE</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- START SERVLET --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.1</version> <configuration> <port>8080</port> <path>/springmvc</path> <uriEncoding>UTF-8</uriEncoding> <finalName>springmvc</finalName> <server>tomcat7</server> </configuration> </plugin> </plugins> <finalName>springmvc</finalName> </build> </project>
springMVC依赖的jar包如下：
一、配置web.xml:
<?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"> <display-name>Archetype Created Web Application</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/root-context.xml</param-value> </context-param> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/mvc-context.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app>
二、mvc-context.xml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:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" 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/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="com.springmvc.demo.controller" /> <mvc:annotation-driven /> <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" /> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" /> --> <!-- <mvc:default-servlet-handler/> --> <mvc:resources location="/resource/images/" mapping="/images/**" /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
说明：
<context:component-scan base-package="com.springmvc.demo.controller" />是将controller让spring去扫描这个包下的@Controller注解的bean，交给spring上下文去管理（依赖注入）。
<mvc:annotation-driven />这句话其实做了很多事，它注册了下面这些特殊用途的bean：
-
RequestMappingHandlerMapping处理controller内的@
RequestMapping注解，将请求url映射为相应的controller内的方法 -
BeanNameUrlHandlerMapping 将请求url映射为bean的name
- RequestMappingHandlerAdapter 负责调用controller相应的方法并处理方法的其他注解
还有其他一些bean，在此不列出。
新建一controller:
package com.springmvc.demo.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import com.springmvc.demo.model.User; @Controller @RequestMapping("/user") public class UserController { @RequestMapping("/add") public ModelAndView addUser(@RequestParam String username,@RequestParam String password,@RequestParam int id){ ModelAndView mv = new ModelAndView(); mv.setViewName("hello"); User u = new User(); u.setUsername(username); u.setPassword(password); u.setId(id); mv.addObject("user", u); return mv; } }
输入url:http://localhost:8080/springmvc/user/add?username=yang&password=123&id=1234
将跳转到hello.jsp:
<!DOCTYPE html> <html> <body> ${user.username},${user.password},${user.id} </body> </html>
可以看g以提交的参数。
