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springMVC学习笔记
一、springMVC环境搭建
1、新建一个文件，选择 java →pack Explore视图
2、把libs下的requai下的jar包引入进来
3、web.xml启动配置springMVC
<servlet> <servlet-name>springMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>【应该是这个jar包下的spring-webmvc-3.2.0.RELEASE.jar下的org.springframework.web.servlet根目录下】
<init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:config/spring-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
4、配置srimgmvc的配置文件
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" 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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <bean name="/test1/helloworld" class="com.tgb.web.controller.HelloWorldController" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
上面的class="org.springframework.web.servlet.view.InternalResourceViewResolver"
在spring-webmvc-3.2.0.RELEASE.jar下的
org.springframework.web.servlet.view下的
InternalResourceViewResolver.class 视图分解的解析器
二、第二节
1、新建一个controller。
package com.tgb.web.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 HelloWorldController implements Controller{ @Override public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception { System.out.println("helloworld,视频第一个springmvc"); return new ModelAndView("/welcome"); }}
spring如何找到这个controller呢
在spring的配置文件 spring-servlet.xml【默认它的路径和web.xml同级。web.xml→spring-servlet.xml】
could not find the resource 文件spring-servlet.xml【解决方案：spring-servlet.xml修改成springMVC-servlet.xml.修改成默认的文件名了】
填写<bean name="/test1/helloworld" class="com.tgb.web.controller.HelloWorldController" />
最后：浏览器输入http://localhost:8080/springMVC1/test1/helloworld 即可访问
三、修改配置文件和给界面传递参数
1、配置文件不在默认路径下
在src下面新建一个config目录，
查看分发器的源代码。可以知道如何寻找的目录。为contextConfigLocation
修改web.xml springMVC的初始化参数
<init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:config/spring-servlet.xml</param-value> </init-param>
2、传递参数
在control里面 //返回string数和//下面是返回map数据
String hello = "lsh hello 提高班";
Map<String,Object> map = new HashMap<String,Object>();
map.put("map1", "提高班1");
map.put("map2", "提高班2");
map.put("map3", "提高班3");
//返回string数据
//return new ModelAndView("/welcome","result",hello);
//下面是返回map数据
return new ModelAndView("/welcome","map",map);
要用estl表达式，引入下面两个包。
jstl的jar包
standard-1.1.2的jar包
四、springmvc实现一个controller书写多个方法
新建一个controller
1、public class MultiController 继承一个MultiActionController
package com.tgb.web.controller;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.multiaction.MultiActionController;public class MultiController extends MultiActionController { public ModelAndView add(HttpServletRequest request,HttpServletResponse response){ System.out.println("----add方法ok----"); return new ModelAndView("/multi","method","add"); } public ModelAndView update(HttpServletRequest request,HttpServletResponse response){ System.out.println("-----update---方法"); return new ModelAndView("/multi","method","update"); } }
2、springmvc的配置里面如何写，就是在springMVC-servlet.xml下
<bean id="paramMethodResolver" class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver"> <property name="paramName" value="action"></property> </bean>
在spring webmvc架包下的mvc下的multiaction.ParameterMethodNameResolver
value="action">请求的时候参数也要随着这个变化。
请求标记的一个解析器
继续配置
<bean name="/test1/multi" class="com.tgb.web.controller.MultiController"> <property name="methodNameResolver"> <ref bean="paramMethodResolver"/> </property> </bean>
然后浏览器输入：http://localhost:8080/springMVC1/test1/multi?action=add
请求不到，解决方案public ModelAndView add(HttpServletRequest request,HttpServletResponse response)需要括号里面的两个参数
五、第5节静态文件的访问
1、新建一个controller
package com.tgb.web.controller;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.multiaction.MultiActionController;public class StaticController extends MultiActionController { public ModelAndView img(HttpServletRequest request,HttpServletResponse response){ return new ModelAndView("/staticFile"); } public ModelAndView jquery(HttpServletRequest request,HttpServletResponse response){ return new ModelAndView("/jquery"); } }
2、新建一个jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!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> <h>图片访问</h> <div> <img alt="图片" src="http://www.mamicode.com/img/a.png"> </div> </body></html>
<bean name="/test1/img" class="com.tgb.web.controller.StaticController"> <property name="methodNameResolver"> <ref bean="paramMethodResolver"/> </property> </bean>
地址正确，图片拿不到，静态文件取不到
继续在springmvc的配置文件中，写一个mvc 标签。
不要拦截，直接访问
<!-- 静态资源访问 --> <mvc:resources location="/img/" mapping="/img/**"/> <mvc:resources location="/js/" mapping="/js/**"/>
springMVC学习笔记