SpringMVC注解驱动与请求响应处理-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_46546447/article/details/115910593

项目准备

在这里插入图片描述
lib

代码书写

Hello.java

package com.biem.springmvc;

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

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class Hello {

	/**
	 * 注解的方式实现springMVC
	 */
	@RequestMapping("/hello.action")
	public String hello01(Model model) {
		model.addAttribute("msg", "hello zhoujielun");
		return "hello";
	}
	
	@RequestMapping("/hello1.action")
	public String hello02(Model model) {
		model.addAttribute("msg", "hello hahah");
		return "hello";
	}
	
	/**
	 * request response获取参数
	 */
	@RequestMapping("/hello2.action")
	public String hello03(HttpServletRequest request,HttpServletResponse response,Model model) {
		
		String username = request.getParameter("username");
		int age = Integer.parseInt(request.getParameter("age"));
		System.out.println(username+age);
		model.addAttribute("msg", "hello hahah");
		return "hello";
	}
}

springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" 
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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-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/context
	   http://www.springframework.org/schema/context/spring-context-4.3.xsd">
	   
	   <context:component-scan base-package="com.biem.springmvc"></context:component-scan>
	   
	   <!-- 开启springMVC注解 -->
	   <mvc:annotation-driven />
	   <!-- 配置处理器映射器 -->
	   <!-- <bean name="/hello.action" class="com.biem.springmvc.Hello"></bean> -->
	   
	   <!-- 配置视图解析器 -->
	   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	         <property name="prefix" value="/WEB-INF/"></property>
	         <property name="suffix" value=".jsp"></property>
	   </bean>
</beans>

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>
    welcome!<br>
    ${msg}<br>
  
</body>
</html>

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" id="WebApp_ID" version="2.5">
  <display-name>SpringMVC_Demo02</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <!--前端控制器 -->
  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
            <param-name>ContextConfigLocation</param-name>
            <param-value>classpath:/springmvc-servlet.xml</param-value>
      </init-param>
  </servlet>
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>*.action</url-pattern>
  </servlet-mapping>
</web-app>