SpringMVC使用注解开发的流程和对应的代码

使用注解开发

第一步:创建Maven项目,基于web开发,并在pom.xml中导入依赖:

<dependencies>
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>4.12version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>5.1.9.RELEASEversion>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>servlet-apiartifactId>
            <version>2.5version>
        dependency>
        <dependency>
            <groupId>javax.servlet.jspgroupId>
            <artifactId>jsp-apiartifactId>
            <version>2.2version>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>jstlartifactId>
            <version>1.2version>
        dependency>
    dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/javadirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
            <resource>
                <directory>src/main/resourcesdirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
        resources>
    build>

第二步:修改web.xml文件


<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    
    <servlet>
        <servlet-name>springmvcservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            
            <param-value>classpath:springmvc-config.xmlparam-value>
        init-param>
        <load-on-startup>1load-on-startup>
    servlet>

    
    <servlet-mapping>
        <servlet-name>springmvcservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>
web-app>

第三步:springmvc-config.xml开发配置


<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
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    
    <context:component-scan base-package="com.maple.controller"/>
    
    <mvc:default-servlet-handler/>

    
    <mvc:annotation-driven/>
    
    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver">
        
        <property name="prefix" value="/WEB-INF/jsp/"/>
        
        <property name="suffix" value=".jsp"/>
    bean>


beans>

第四步:创建一个com.maple.controller包,并创建一个controller类

//自动陪spring扫描的注解
@Controller
public class HelloController {
    //请求的路径
    @RequestMapping("/hello")
    public String hello(Model model){
        //封装数据;
        model.addAttribute("msg","Hello,SpringMVC");
        return "hello";//会被视图解析器处理;
    }
}

第五步:创建视图并接收数据hello.jsp 这里要注意你前缀的路径要与这里的路径一致

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    Title


${msg}


第六步:配置Tomcat,并启动测试:

http://localhost:8080/hello

小结:使用注解开发共6步

第一步:创建Maven项目

第二步:修改web.xml文件

第三步:springmvc-config.xml开发配置

第四步:建一个controller类

第五步:创建视图

第六步:配置Tomcat

以后的开发我们只需要改变第四步和第五步对应的代码,其他的步骤基本就是固定的步骤,基本不变。

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