SpringMVC系列之一、集成JSP

SpringMVC系列之一、集成JSP
SpringMVC系列之二、集成FreeMarker
SpringMVC系列之三、集成Log4j

1. maven工程的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.john.springmvc</groupId>
  <artifactId>chapter5</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>chapter5 Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <properties>
    <jstl.version>1.2</jstl.version>
    <servlet.version>2.5</servlet.version>
    <spring.version>3.1.2.RELEASE</spring.version>
  </properties>
  <dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>${jstl.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>${servlet.version}</version>
    </dependency>
    <!-- spring-webmvc会把依赖的其它spring包导入 -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>chapter5</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-resources-plugin</artifactId>
            <version>2.5</version>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
    </plugins>
  </build>
</project>

spring-webmvc自动导入的spring依赖包：


2. web.xml配置

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="chapter5" version="2.5">
  <!-- The encoding filter should be placed as the first filter -->
  <filter>
    <filter-name>encodingFilter</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>
    <init-param>
        <param-name>forceEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <servlet>
    <servlet-name>chapter5</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/mvc-start.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>chapter5</servlet-name>
    <url-pattern>*.htm</url-pattern>
  </servlet-mapping>
</web-app>

mvc-start.xml

<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"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!-- 在不指定其它HandlerMapping和HandlerAdapter情况下，SpringMVC默认会实例化BeanNameUrlHandlerMapping和SimpleControllerHandlerAdapter -->
<!-- 如果bean的名称以'/'开头，放到列表中，判断请求路径是否在此列表中，是就调用对应bean的方法来处理请求 -->
<!--<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />-->
<!-- 调用实现了Controller接口的控制器的handleRequest方法来处理请求 -->
<!--<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>-->

<!-- General View resolver -->
<bean id="viewResolverCommon" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
    <property name="prefix" value="/WEB-INF/jsp/"/><!--JSP文件存放路径-->
    <!--<property name="suffix" value=".jsp"/>--><!--JSP文件扩展名，SpringMVC将(prefix+视图名+suffix)拼接为文件路径，然后去读该文件-->
    <property name="order" value="1" /><!--视图解析器优先级，数值越小，优先级越高，最高优先级为0-->
</bean>

<bean name="/first.htm" class="com.john.chapter5.web.controller.FirstController" />
</beans>

3. FirstController类

public class FirstController implements Controller {
    @Override
    public ModelAndView handleRequest(HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        ModelAndView mv = new ModelAndView("hello.jsp");
        mv.addObject("msg", "Hello World!");
        return mv;
    }
}

4. 在/WEB-INF/jsp目录下新建hello.jsp文件

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>  
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
<html>  
<head>  
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
<title>Hello World</title>  
</head>  
<body>  
${msg}  
</body>  
</html>

5. 运行/调试工程，请求http://localhost:8080/chapter5/first.htm，页面输出：
Hello World!