SpringMVC学习（二）——基于xml配置的springMVC项目（maven+spring4）

可运行的附件地址：http://files.cnblogs.com/files/douJiangYouTiao888/springWithXML.zip

项目说明：

[b]作者环境：maven3+jdk1.8+spring4[/b]

项目结构：



父pom：主要是进行一系列版本定义

<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/xsd/maven-4.0.0.xsd"> <!-- 基础组件模块，定义各种公用的组件 -->
<modelVersion>4.0.0</modelVersion>
<groupId>com.wang</groupId>
<artifactId>basicmodule</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>basicmodule</name>
<url>http://maven.apache.org</url>
<!-- 常量属性 -->
<properties>
<!-- 编码集 -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- spring版本 -->
<springframework.version>4.3.7.RELEASE</springframework.version>
</properties>
<!-- 模块定义 -->
<dependencyManagement>
<dependencies>
<!-- spring模块 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<!-- servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<!-- <scope>provide</scope> -->
</dependency>
<!-- jstl，需要引入jstl.jar和standard.jar -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- <dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provide</scope>
</dependency> -->
</dependencies>
</dependencyManagement>

</project>

当前pom：

<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.wang</groupId>
<artifactId>springWithXML</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>springWithXML Maven Webapp</name>
<url>http://maven.apache.org</url>
<!-- 父模块，基础模块 -->
<parent>
<groupId>com.wang</groupId>
<artifactId>basicmodule</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<dependencies>
<!-- springMVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
</dependency>
<!-- servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
</dependencies>
<build>
<finalName>sprintWithXML</finalName>
</build>
</project>

web.xml

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

<web-app version="3.0" 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"> <!--
源码：spring-web.jar
功能：字符集过滤器，设置编码集为UTF-8，解决POST的中文乱码问题。
参数说明：
encoding：request的编码集(request.setCharacterEncoding("UTF-8"))
forceEncoding：默认为false设置为true，response的编码集也强制转变成UTF-8(response.setCharacterEncoding("UTF-8"))
-->
<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>
<!--
源码：spring-web.jar
默认配置：/WEB-INF/${servlet-name}-servlet.xml，即/WEB-INF/wly-servlet.xml
覆盖默认配置：初始化参数：contextConfigLocation，参数多个值使用逗号隔开，如：a.xml,b.xml
-->
<servlet>
<servlet-name>wly</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:wly-servlet.xml</param-value>
</init-param>
<!-- 容器初始化加载此servlet -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>wly</servlet-name>
<!--
一般有以下写法：
*.do    拦截固定格式的请求
/       rest风格的写法：拦截所有资源，需要针对静态资源做单独处理
/*      错误写法：会在处理完请求后拦截jsp导致404错误
-->
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 测试使用的servlet -->
<servlet>
<servlet-name>testServlet</servlet-name>
<servlet-class>com.wang.servlet.TestServlet</servlet-class>
</servlet>
</web-app>

springmvc核心配置文件：wly-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"
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"> <!-- 公共配置，默认配置在org.springframework.web.servlet.Dispatcher类同包DispatcherServlet.properties下 -->
<!-- HandlerMapping，映射器，配置的bean.name对应请求的url，将请求的url映射为一个HandlerExecutionChain对象（包含一个Handler和多个HandlerInterceptor) -->
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
<!-- HandlerAdapter，将handler包装为适配器，满足各种不同适配器的使用，Controller、SimpleFormController等 -->
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
<!-- ViewResovler，将拼接视图逻辑名称转为物理视图 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 需要引入jstl的相关jar包，jstl1.2以下需要引入jstl.jar、standard.jar -->
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 静态资源处理，不拦截静态资源 -->
<mvc:resources location="/" mapping="/**/*.js"></mvc:resources>

<!-- handler,处理器，需要开发实现 -->
<bean name="/wang" class="com.wang.controller.WangController"/>
<!-- 接口return null的情况代表已经把输出通过流的形式返回，无需进行视图的解析 -->
<bean name="/testNull" class="com.wang.controller.NullController"/>
<!-- GET、POST请求方式的限定，supportedMethods需要配合AbstractController使用 -->
<bean name="/helloPost" class="com.wang.controller.HelloController">
<property name="supportedMethods" value="POST"></property>
</bean>
<!-- 缓存响应信息 -->
<bean name="/helloCache" class="com.wang.controller.HelloController">
<!-- 默认为-1，>0的值代表缓存时间 -->
<property name="cacheSeconds" value="8"></property>
</bean>
<!-- 请求转发给servlet来处理 -->
<bean name="/helloServlet" class="org.springframework.web.servlet.mvc.ServletForwardingController">
<!--value对应web.xml的<servlet-name>-->
<property name="servletName" value="testServlet"></property>
</bean>
</beans>

java类：

package com.wang.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

public class HelloController extends AbstractController{
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
System.err.println("deal request");
ModelAndView mv =new ModelAndView();
//模型
mv.addObject("message","test");
//视图
mv.setViewName("index");
return mv;
}
}

package com.wang.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class NullController implements Controller{

public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
response.getWriter().write("<a href=''>this</a>");
//return null给DispatcherServlet，即告知servlet无需进行视图解析。
return null;
}
}

package com.wang.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class WangController implements Controller {

public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
System.err.println("deal request!");
ModelAndView mv =new ModelAndView();
//模型
mv.addObject("message","test");
//视图
mv.setViewName("index");
return mv;
}
}

package com.wang.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TestServlet extends HttpServlet{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req, resp);
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
System.err.println("servlet处理");
resp.sendRedirect("index.jsp");
}
}

测试URL：

　　http://ip:port/具体URL

　　1.Controller返回ModeAndView：/wang

　　2.Controller返回null：/testNull

　　3.只接受POST请求：/helloPost

　　4.缓存响应信息：/helloCache

　　5.请求转发给servlet来处理：/helloServlet

　　例：http://localhost:8088/wang

OK，大功告成~