创建最基本的SpringMVC应用-基于xml

作者: ssttIsme | 来源:发表于2019-03-19 17:14 被阅读0次

创建最基本的SpringMVC应用-基于xml
springMVC创建和初始化
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SpringMvc基本环境配置
SpringMVC

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右键选择Generate Deployment Descriptor Stub

勾上这个勾

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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.spring</groupId>
    <artifactId>springmvc-basic</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
    </dependencies>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>springmvc-basic</display-name>
 <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <!--这个servlet在SpringMvc中充当前端控制器的角色  -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置servlet初始化参数 -->
        <init-param>
            <!-- 这个参数名不能修改，代表配置文件的位置 -->
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext-*.xml</param-value>
        </init-param>
        <!-- 配置容器启动时初始化这个servlet -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!--配置servlet映射 ,在客户端发起请求时，这个url的后缀要求为.do-->
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

hello.jsp

<%@ 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>Insert title here</title>
</head>
<body>
    <h1>${msg}</h1>
</body>
</html>

applicationContext-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xsi:schemaLocation="  
       http://www.springframework.org/schema/beans   
       http://www.springframework.org/schema/beans/spring-beans-4.3.xsd  
       http://www.springframework.org/schema/mvc   
       http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd   
       http://www.springframework.org/schema/tx   
       http://www.springframework.org/schema/tx/spring-tx-4.3.xsd   
       http://www.springframework.org/schema/aop 
       http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
       http://www.springframework.org/schema/util 
       http://www.springframework.org/schema/util/spring-util-4.3.xsd
       http://www.springframework.org/schema/data/jpa 
       http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.3.xsd">
    <!--配置bean -->
    <bean id="helloController" class="com.project.controller.HelloController" />
    <!--配置HanlderMapping(处理映射)配置url与具体后端控制器的映射 -->
    <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/hello.do">helloController</prop>
            </props>
        </property>
    </bean>
    <!--配置springMVC视图解析器(解析modelAndView对象中封装的view信息) -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀 -->
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>

HelloController.java

package com.project.controller;

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

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
/**
 * SpringMVC中的后端控制器
 * client
 * 1)request->tomcat
 * 2)tomcat->DispatcherServlet(web.xml)
 * 3)DispatcherServlet->查找映射关系(applicationContext-mvc.xml)->HelloController
 * 4)HelloController->handleRequest
 */
public class HelloController implements Controller {

    /**
     * 用于处理请求
     */
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        //构建模型和视图(作用:封装数据)
        ModelAndView mv=new ModelAndView();
        mv.addObject("msg","Hello SpringMVC");
        //设置呈现数据的页面
        mv.setViewName("hello");
        return mv;//数据，视图
    }

}

http://localhost/springmvc-basic/hello.do