springMVC注解（一）Controller

时间：2023-12-10 23:10:02

HelloWorld程序

Step1 　　　编写web.xml文件

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

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee">

    <display-name></display-name>

    <welcome-file-list>

        <welcome-file>index.jsp</welcome-file>

    </welcome-file-list>

    <servlet>

        <servlet-name>springMVC</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet

        </servlet-class>

    </servlet>

    <servlet-mapping>

        <servlet-name>springMVC</servlet-name>

        <!-- 匹配所有URL -->

        <url-pattern>/</url-pattern>

    </servlet-mapping>

</web-app>

Step2　　　　编写springMVC-servlet.xml（映射文件）

<?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-4.2.xsd

    http://www.springframework.org/schema/mvc

    http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-4.2.xsd">

    <!-- spring自动去扫描base-package下面的包或者子包下面的java文件 -->

    <!-- 如果扫描到有spring的相关注解的类，则把这些类注册为spring的Bean -->

    <context:component-scan base-package="org.fkit.controller" />

    <!-- 视图解析器配置开始 -->

    <bean id="viewResolver"

        class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <!-- 前缀 -->

        <property name="prefix">

            <value>/WEB-INF/content/</value>

        </property>

        <!-- 后缀 -->

        <property name="suffix">

            <value>.jsp</value>

        </property>

    </bean>

</beans>

Step3　　　　编写控制器org.fkit.Controller

package org.fkit.controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

public class HelloWorldController {

    @RequestMapping("/helloWorld")

    public String helloWorld(Model model) {

        //model为模型数据，增加属性message,值为:"hello World"

        model.addAttribute("message", "Hello World");

        return "helloWorld";

    }

}

Step4　　　WEB-INF/content/目录下创建文件helloWorld.jsp

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"

    pageEncoding="ISO-8859-1"%>

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>ControllerTest</title>

</head>

<body>

${message }

</body>

</html>

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