SpringMVC学习之基础篇

chenzheng8975

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SpringMVC

SpringMVC

浏览器地址栏请求：http:localhost:8080/springmvc_hello/hello?username=kk

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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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">
	<servlet>
		<servlet-name>hello</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>hello</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<filter>
		<filter-name>CharacterFilter</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>
	<filter-mapping>
		<filter-name>CharacterFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

hello-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"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
	
	<context:component-scan base-package="zttc.itat.controller"/>
	<mvc:annotation-driven/>
	<!-- 将静态文件指定到某个特殊的文件夹中统一处理 -->
	<mvc:resources location="/resources/" mapping="/resources/**"/>
	<bean name="/welcome.html" class="zttc.itat.controller.WelcomeController"></bean>
	
	<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>
	
	<!-- 设置multipartResolver才能完成文件上传 -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="maxUploadSize" value="5000000"></property>
	</bean>
	
	<bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
		<property name="exceptionMappings">
			<props>
				<prop key="zttc.itat.model.UserException">error</prop>
			</props>
		</property>
	</bean>
</beans>

HelloController.java:

package zttc.itat.controller;


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

@Controller
public class HelloController {
	
	//RequestMapping表示用那个url来对应
	@RequestMapping({"/hello","/"})
	public String hello(String username,Model model) {
		System.out.println("hello");
		model.addAttribute("username", username);
		//此时用那个作为key?它默认是使用对象的类型作为key-->model.addAttribute("string",username)
		//model.addAttribute(new User());-->addAtt("user",new User());
		model.addAttribute(username);
		System.out.println(username);
		return "hello";
	}
	
	@RequestMapping("/welcome")
	public String welcome() {
		return "welcome";
	}
	
}

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>
<h1>hello ${username }!!</h1>
${string }
</body>
</html>

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