SpringMVC学习第一天
1. 搭建环境
2. 如何完成Controller和Viewer的映射
3. 如何把值传递给Controller
4. Controller如何把值传递给Viewer
5. 异常处理
6. 页面标签
7. 文件上传
8. 深入一下源代码
Spring MVC流程图：
1. 环境搭建
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</ display-name> <servlet > <servlet-name> spring</servlet-name > <servlet-class> org.springframework.web.servlet.DispatcherServlet</servlet-class > <load-on-startup> 1</ load-on-startup> </servlet > <servlet-mapping > <servlet-name> spring</servlet-name > <url-pattern> /</ url-pattern> </servlet-mapping > </web-app>
spring-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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="controller" /> <mvc:annotation-driven /> <bean name="/welcome.html" class="controller.WelcomeController" ></bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" > <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean > </beans>
WelcomeController
package controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
public class WelcomeController extends AbstractController
{
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request ,
HttpServletResponse response) throws Exception {
System. out.println("welcome" );
return new ModelAndView("welcome");
}
}
HelloController
package controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController
{
//RequestMapping表示用哪個url 來對應
@RequestMapping({ "/hello","/" })
public String hello()
{
System. out.println("hello" );
return "hello" ;
}
@RequestMapping( "/welcome")
public String welcome()
{
return "welcome" ;
}
}
源码：http://pan.baidu.com/s/1eQtgvfW
2. 如何完成Controller和Viewer的映射
注意:
package controller;
import org.springframework.stereotype.Controller ;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
@Controller
public class HelloController
{
//RequestMapping表示用哪個url 來對應
// @RequestParam ("userName" )如果你不传userName值过来的话会报错,可以省略，不传值为null
@RequestMapping({ "/hello","/" })
public String hello( @RequestParam("userName" ) String userName)
{
System. out.println("hello" );
System. out.println(userName );
return "hello" ;
}
@RequestMapping( "/welcome")
public String welcome()
{
return "welcome" ;
}
}
HelloController
package controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController
{
//RequestMapping表示用哪個url 來對應
@RequestMapping({ "/hello" ,"/" })
public String hello(String userName ,Model model )
{
System. out .println("hello" );
model .addAttribute("userName" , userName );
//此时用哪个作变key?它是默认使用的对象的类型作为 key -->model.addAttribute("string", userName);
//model.addAttribute(new user()); -->model.addAttribute("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>
spring-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:mvc ="http://www.springframework.org/schema/mvc" xmlns:context ="http://www.springframework.org/schema/context" xsi:schemaLocation ="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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package ="controller" /> <mvc:annotation-driven /> <bean id= "viewResolver" class ="org.springframework.web.servlet.view.InternalResourceViewResolver" > <property name= "prefix" value ="/WEB-INF/jsp/" /> <property name= "suffix" value =".jsp" /> </bean > </ beans>
源码： http://pan.baidu.com/s/1o6A0YpG