SpringMVC入门（一）--a.入门搭建

爱被打了一巴掌 2022-05-27 11:19 202阅读 0赞

**了解：**

**javaEE体系结构：**

应用层：application;

web层：struts2,springMVC;

业务层：spring;

持久层：Hibernate，mybatis;

## **1.SpringMVC简介：** ##

SpringMVC是javaEE的web层MVC框架。类似Struts2

## **2.什么事MVC:** ##

MVC是一种设计模式，M(模型model)、V(试图view)、C(控制controlor);-\-**解耦和**

![70][]

## **3.springmvc 执行流程** ##

**![20180419171335964][]**

## **4.springmvc 入门程序** ##

### 4.1创建一个DynamicwebProject ###

### 4.2导入jar包 ###

![70 1][]

### 4.3 配置web.xml 文件 ###

#### 4.3.1 配置前端控制器 ####

<servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      
       
      </servlet>
      
      <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>*.do</url-pattern>
      </servlet-mapping>

### 4.4 配置springmvc-servlet.xml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"
    	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans 
    		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
    		http://www.springframework.org/schema/mvc 
    		http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
    		http://www.springframework.org/schema/context 
    		http://www.springframework.org/schema/context/spring-context-3.2.xsd 
    		http://www.springframework.org/schema/aop 
    		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
    		http://www.springframework.org/schema/tx 
    		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
    
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
    
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
    
    <bean id="viewResover" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    			<property name="prefix" value="/WEB-INF/pages/"></property>
    			<property name="suffix" value=".jsp"></property>
    </bean>
    
    <bean name="/cccController.do" class="com.zit.controller.UserController"></bean>

</beans>

### 4.5 自定义Controller ###

package com.zit.controller;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.springframework.web.servlet.ModelAndView;
    import org.springframework.web.servlet.mvc.Controller;
    
    public class UserController implements Controller {
    
    	@Override
    	public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
    			
    		ModelAndView mav = new ModelAndView();
    		mav.addObject(""
    				+ "username", "欧阳夏丹");
    		mav.addObject("userinfo", "springmvc从入门到精通！");
    		
    		System.out.println("****************************");
    		mav.setViewName("index");
    		return mav;
    	}
    
    }

##     ##

## 4.6定义视图页面 ##

![70 2][]

<%@ 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>用户名：</h1>
    <a><h1>${username}</h1></a>
    </body>
    </html>

## **5.名词解释** ##

### 5.1 处理器映射器 ###

## **BeanNameUrlHandlerMapping** ##

功能：寻找Controller

根据url请求去匹配bean的name属性url，从而获取Controller

![70 3][]

## **SimpleUrlHandlerMaping** ##

功能：寻找Controller

根据浏览器url匹配简单url的key，key又Controller的id找到Controller

![70 4][]

## **ControllerClassNameHandlerMapping** ##

功能：寻找Controller

根据类名（MyController）类名.do来访问,类名首字母小写

![70 5][]

### 5.2 **处理器****适配器** ###

**SimpleControllerHandlerAdapter**

功能：执行controller

调用controller里面方法，返回modelAndView。

![70 6][]

## **HttpRequestHandlerAdapter** ##

功能：执行controller

![70 7][]

## **6.中文乱码解决** ##

### **6.1Get请求乱码** ###

**![70 8][]**

**6.2post乱码**

##  ##

Spring编码过滤器：在web.xml配置

<filter>
      	<filter-name>characterEncoding</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>characterEncoding</filter-name>
      	<url-pattern>/*</url-pattern>
      </filter-mapping>

## 7.**时间类型转换** ##

/**
    	 * 时间转换--spring mvc 自己的方法
    	 */
    	@Override
    	protected void initBinder(HttpServletRequest request, 
    			ServletRequestDataBinder binder) throws Exception {
    		String str =request.getParameter("birthday");
    		
    		if(str.contains("/")) {
    			binder.registerCustomEditor(Date.class, 
    					new CustomDateEditor(new SimpleDateFormat("yyyy/MM/dd"), true));
    		}else if(str.contains("-")) {
    			binder.registerCustomEditor(Date.class, 
    					new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true));
    		}
    		
    		
    	}

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