SpringMVC注解开发基础1---配置

时间：2021-09-21 05:47:50

1.Eclipse中创建dynamic web project；

2.导入springmvc需要的jar包，可能导多了，没这么多；jar包拷贝到web-inf下面的lib文件加，不要直接引用，中文名等路径会报错，无法正常执行。

SpringMVC注解开发基础1---配置

3.web.xml配置；（web.xml名称固定，全部小写）

<?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_3_0.xsd" id="WebApp_ID" version="3.0">
 	<!-- Filter 定义处理中文乱码 -->  
    <!-- Character Encoding filter -->  
    <filter>  
        <filter-name>encodingFilter</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>  
        <init-param>  
            <param-name>forceEncoding</param-name>  
            <param-value>true</param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>encodingFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  

  <display-name>SpringMVCThree</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>
  	<!-- 配置前端控制器,如果请求是以action结尾就走springmvc查找相应处理器 -->
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- 加载springmvc配置文件 -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
	  		<param-value>classpath:springmvc.xml</param-value>
		</init-param>
	</servlet>
	<servlet-mapping>
	  	<servlet-name>springmvc</servlet-name>
	  	<url-pattern>*.action</url-pattern>
	</servlet-mapping>
</web-app>
4.右击新建source folder文件夹名称config,在里面新建springmvc.xml和上面web.xml中名称相同；

    source folder:存放java源代码的文件夹,当然也包括一些package文件夹,还可以包含其他文件.  项目构建后,source folder里面的java自动编译成class文件到相应的/web-inf/classes文件夹中,其他文件也会移到/web-inf/classes相应的目录下.  

<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 ">		<!-- 自动扫描包下面的文件，类上带有@Controller的会注册为bean -->		<context:component-scan base-package="com.taray.controller"></context:component-scan>		<!-- 代替处理器映射器、处理器适配器 ,mvc注解驱动-->		<mvc:annotation-driven/>		<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">			<!-- 配置jsp路径的前缀，后缀，那样在controller中设置视图时候不需要再加了 -->			<!-- prefix前缀如果 不添加，那么如果在@controller注解下有一个@requestmapping("name")访问时候会出错-->			<property name="prefix" value="/"/>			<property name="suffix" value=".jsp"/>		</bean></beans>

5.Controller处理器处理请求需要编写的代码：

SpringMVC注解开发基础1---配置

@Controllerpublic class UserController {	//实际访问通过@RequestMapping("/modify")地址,和方法名无关	@RequestMapping("/modify")	public String modify(UserVO uservo,String address,Model model){		if(uservo!=null){			//获取对象,springmvc将表单中name名词和UserVO中的字段名称相同的值赋进去，这儿uservo可以得到页面提交的4个值			model.addAttribute("uservo", uservo);			System.out.println("输出uservo.address:"+uservo.getAddress());			//在形参中定义string address单个参数,如果页面有name=“address”的标签，这样在这儿就可以取到它的值			System.out.println("输出address："+address);			//输出uservo.address:某某地址			//输出address：某某地址		}		//如果返回值定义的String类型,那么modelandview中视图通过return "页面地址";转到新页面		return "/index";	}}
6 . index页面 
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><%  String path = request.getContextPath();  String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.6.4.min.js"></script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>查询商品列表</title></head><body> <script type="text/javascript">  </script>  <div>	<h2>springmvc测试1</h2>	<form action="modify.action" method="post">		<table>			<tr>				<td>id：<input type="text" value="${uservo.id }" name="id"/></td>			</tr>			<tr>			<td>name:<input type="text" value="${uservo.name }" name="name"/></td>			</tr>			<tr>				<td>age:<input type="text" value="${uservo.age }" name="age"/></td>			</tr>			<tr>				<td>address:<input type="text" value="${uservo.address }" name="address"/></td>			</tr>		</table>		<input type="submit" value="提交"/>	</form></div></body></html>

7.UserVO实体类

package com.taray.pojo;public class UserVO {	private int id;	private String name;	private int age;	private String address;	public int getId() {		return id;	}	public void setId(int id) {		this.id = id;	}	public String getName() {		return name;	}	public void setName(String name) {		this.name = name;	}	public int getAge() {		return age;	}	public void setAge(int age) {		this.age = age;	}	public String getAddress() {		return address;	}	public void setAddress(String address) {		this.address = address;	}	}
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