springmvc_环境搭建

 

1.pom.xml的配置

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <parent>
        <artifactId>day02_parent</artifactId>
        <groupId>it.heima</groupId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../day02_parent/pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springmvc_day02</artifactId>
    <!--表明是web端,打包方式是war包-->
    <packaging>war</packaging>

    <!--导入插件-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <configuration>
                    <path>/</path>
                    <port>80</port>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <!--导入依赖-->
    <dependencies>
        <!--导入spring-webmvc(同时导入他的依赖包)-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </dependency>

        <!--导入jsp相关包-->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
        </dependency>

        <!--到json包-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
    </dependencies>

</project>

2.进行测试,看看tomcat是否能正常运转,出现helloworld表示tomcat正常

------------------------前面都是准备工作--------------------------------------------------------------------------------------------------------

3. 配置前端控制器web.xml(DispatcherServlet)

<web-app>
      <display-name>Archetype Created Web Application</display-name>
      <!--这是前端控制器DispacherServlet-->
      <servlet>
            <!--此处是引入dispatcherServlet-->
            <servlet-name>springmvc</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <!--此处说明:springmvc配置文件的所在位置-->
            <init-param>
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath:springmvc/applicationContext_mvc.xml</param-value>
            </init-param>
            <!--此处配置说明:服务器一启动就实现类-->
            <load-on-startup>1</load-on-startup>
      </servlet>
      
      <servlet-mapping>
            <!--此处说明要拦截的是.do结尾的浏览器访问-->
            <servlet-name>springmvc</servlet-name>
            <url-pattern>*.do</url-pattern>
      </servlet-mapping>
</web-app>

补充说明:前端控制器关联springmvc

此处有两种写法:第一种是默认的

第一种:框架约定:默认是将springmvc配置文件放在WEB-INF目录下,且文件名必须是name-servlet.xml,name必须是前端控制器里面的name.

第二种:开发者可用将springmvc放在自定义位置,这时就要因为<init-param>标签,且name:contextConfiglocation

4. 构建处理器:

//Controller表明这时个处理器
@Controller
public class TestController {
    @RequestMapping("show01")
    public ModelAndView show01(){
        ModelAndView mv = new ModelAndView("hello");
        mv.addObject("msg","这是第二个mvc");
        return mv;
    }

5 构建:springmvc

<?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: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">

        <!--配置HandelMappler,HandelAspact-->
        <mvc:annotation-driven/>
        <!--配置控制器-->
        <context:component-scan base-package="it.heima.controller"/>
        <!--配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

6. 构建视图页面

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
 <h1>${msg}</h1>
</body>
</html>

7.开启服务器,浏览器请求数据及结果

访问的过程: