springmvc简单配置

1、项目结构

2、配置解释

　　1.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">
<!-- 在启动Web项目时，容器(比如Tomcat)会读web.xml配置文件中的两个节点<listener>和<contex-param> -->
    <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>
          classpath*:spring/ContextLoaderListener.xml
      </param-value>
    </context-param>
       <listener>  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- POST中文乱码过滤器 -->
    <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>
    
     <servlet>
        <servlet-name>mywenapp</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <!-- 表示启动容器时初始化该Servlet -->      
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:spring/spring-servlet.xml</param-value>
        </init-param>
         <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>mywenapp</servlet-name>
       <!--  表示哪些请求交给Spring Web MVC处理， “/” 是用来定义默认servlet映射的。也可以如“*.html”表示拦截所有以html为扩展名的请求 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

2.ContextLoaderListener.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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">

</beans>

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

    <!-- HandlerMapping -->
    <!-- 表示将请求的URL和Bean名字映射，如URL为 “上下文/hello”，则Spring配置文件必须有一个名字为“/hello”的Bean，上下文默认忽略。 -->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    
    <!-- HandlerAdapter -->
    <!-- 表示所有实现了org.springframework.web.servlet.mvc.Controller接口的Bean
    可以作为Spring Web MVC中的处理器。如果需要其他类型的处理器可以通过实现HadlerAdapter来解决 -->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
    
    <!-- ViewResolver -->
    <!-- InternalResourceViewResolver：用于支持Servlet、JSP视图解析 -->
    <!-- viewClass：JstlView表示JSP模板页面需要使用JSTL标签库，classpath中必须包含jstl的相关jar包 -->
    <!--  prefix和suffix：查找视图页面的前缀和后缀（前缀[逻辑视图名]后缀），比如传进来的逻辑视图名为hello，则该该
jsp视图页面应该存放在“WEB-INF/jsp/hello.jsp”-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    
    <!-- 处理器 -->
    <bean name="/hello" class="mywenapp.controller.HelloWorldController"/>
    
</beans>

　　4.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>mywebapp</groupId>
  <artifactId>mywenapp</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>mywenapp 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>javax.activation</groupId>
        <artifactId>activation</artifactId>
        <version>1.1.1</version>
    </dependency>
    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mail</artifactId>
        <version>1.4.7</version>
    </dependency>
    
    <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.2.5.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>4.1.1.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>4.1.1.RELEASE</version>
        </dependency>
        <dependency>
        <groupId>org.springframework</groupId>
            <artifactId>spring-asm</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
               <version>1.1.2</version>
        </dependency>    
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>    
  </dependencies>
  <build>
    <finalName>mywenapp</finalName>
  </build>
</project>

 

3、后端

package mywenapp.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 HelloWorldController implements Controller {
    @Override
    public ModelAndView handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception {
        //1、收集参数
        //2、绑定参数到命令对象
        //3、调用业务对象
        //4、选择下一个页面
        ModelAndView mv = new ModelAndView();
        //添加模型数据 可以是任意的POJO对象
        mv.addObject("message", "Hello World!");
        //设置逻辑视图名，视图解析器会根据该名字解析到具体的视图页面
        mv.setViewName("hello");
        return mv;
    }
}

4、前端

<%@ 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>
${message }
</body>
</html>