3.SpringMVC介绍

1.采用Spring MVC的好处

Dispathcher Servlet必须做如下的事情：

1.根据URI调用相应的action

2.实例化正确的控制器类

3.根据请求参数值来构造表单bean

3.调用控制器对象的相应方法

4.转向到一个视图（JSP页面）

SpringMVC提供了Dispatcher Servlet

使用基于XML的配置文件，实例化控制器

自动绑定用户输入，正确转换数据类型

可以校验用户输入，支持国际化和本地化，

支持多种视图

2.SpringMVC的DispatcherServlet

相当于调度员Servlet

配置部署：

 <?xml version="1.0" encoding="UTF-8"?>

 <web-app version="3.0"

         xmlns="http://java.sun.com/xml/ns/javaee"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

     <servlet>

         <servlet-name>springmvc</servlet-name>

         <servlet-class>

             org.springframework.web.servlet.DispatcherServlet

         </servlet-class>

         <load-on-startup>1</load-on-startup>

     </servlet>

     <servlet-mapping>

         <servlet-name>springmvc</servlet-name>

         <url-pattern> /</url-pattern>

     </servlet-mapping>

 </web-app>

load-on-startup 如存在，在程序启动时加载，
如不存在，在一个请求时候加载

springMVC的配置文件，可以放在WEB-INF下
也可以放在任何地方，用init-param加载该文件

 <?xml version="1.0" encoding="UTF-8"?>

 <web-app version="3.0"

         xmlns="http://java.sun.com/xml/ns/javaee"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

     <servlet>

         <servlet-name>springmvc</servlet-name>

         <servlet-class>

             org.springframework.web.servlet.DispatcherServlet

         </servlet-class>

         <init-param>

             <param-name>contextConfigLocation</param-name>

             <param-value>/WEB-INF/config/springmvc-config.xml</param-value>

         </init-param>

         <load-on-startup>1</load-on-startup>

     </servlet>

     <servlet-mapping>

         <servlet-name>springmvc</servlet-name>

         <url-pattern>*.action</url-pattern>

     </servlet-mapping>

 </web-app>

3.Controller接口(传统风格控制器，要实现Controller接口)
2.5以前开发控制的唯一方法是org.springframework.web.servlet.mvc.Controller接口
只有一个方法handleRequest，而他的实现类只能处理一个单一动作Action
  ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response) 
而基于注解的控制器可以控制多个动作，无需实现任何接口

4.SpringMVC第一个应用
1.目录结构
spring-webmvc-x.y.z.jar包括了 DispatcherServlet

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" alt="" />

2.部署描述符文件和SpringMVC配置文件

2.1 部署文件

没有init-param，所以放在WEB-INF下

<url-pattern>/</url-pattern> 将所有的URL映射到该Servlet上

 <?xml version="1.0" encoding="UTF-8"?>

 <web-app version="3.0"

         xmlns="http://java.sun.com/xml/ns/javaee"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

     <servlet>

         <servlet-name>springmvc</servlet-name>

         <servlet-class>

             org.springframework.web.servlet.DispatcherServlet

         </servlet-class>

         <load-on-startup>1</load-on-startup>

     </servlet>

     <servlet-mapping>

         <servlet-name>springmvc</servlet-name>

         <url-pattern>/</url-pattern>

     </servlet-mapping>

 </web-app>

2.2 SpringMVC的配置文件

2个控制器类

 <?xml version="1.0" encoding="UTF-8"?>

 <beans xmlns="http://www.springframework.org/schema/beans"

        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">

     <bean name="/product_input.action" class="app03a.controller.InputProductController"/>

     <bean name="/product_save.action" class="app03a.controller.SaveProductController"/>

 </beans>

3.Controller

 package app03a.controller;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.springframework.web.servlet.ModelAndView;

 import org.springframework.web.servlet.mvc.Controller;

 public class InputProductController implements Controller {

     private static final Log logger = LogFactory

             .getLog(InputProductController.class);

     @Override

     public ModelAndView handleRequest(HttpServletRequest request,

             HttpServletResponse response) throws Exception {

         logger.info("InputProductController called");

         return new ModelAndView("/WEB-INF/jsp/ProductForm.jsp");

     }

 }

 package app03a.controller;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.springframework.web.servlet.ModelAndView;

 import org.springframework.web.servlet.mvc.Controller;

 import app03a.domain.Product;

 import app03a.form.ProductForm;

 public class SaveProductController implements Controller {

     private static final Log logger = LogFactory

             .getLog(SaveProductController.class);

     @Override

     public ModelAndView handleRequest(HttpServletRequest request,

             HttpServletResponse response) throws Exception {

         logger.info("SaveProductController called");

         ProductForm productForm = new ProductForm();

         // populate action properties

         productForm.setName(request.getParameter("name"));

         productForm.setDescription(request.getParameter("description"));

         productForm.setPrice(request.getParameter("price"));

         // create model

         Product product = new Product();

         product.setName(productForm.getName());

         product.setDescription(productForm.getDescription());

         try {

             product.setPrice(Float.parseFloat(productForm.getPrice()));

         } catch (NumberFormatException e) {

         }

         // insert code to save Product

         return new ModelAndView("/WEB-INF/jsp/ProductDetails.jsp", "product",

                 product);//路径，模型名称，模型

     }

 }

 package app03a.form;

 public class ProductForm {

     private String name;

     private String description;

     private String price;

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public String getDescription() {

         return description;

     }

     public void setDescription(String description) {

         this.description = description;

     }

     public String getPrice() {

         return price;

     }

     public void setPrice(String price) {

         this.price = price;

     }

 }

 package app03a.domain;

 import java.io.Serializable;

 public class Product implements Serializable {

     private static final long serialVersionUID = 748392348L;

     private String name;

     private String description;

     private float price;

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public String getDescription() {

         return description;

     }

     public void setDescription(String description) {

         this.description = description;

     }

     public float getPrice() {

         return price;

     }

     public void setPrice(float price) {

         this.price = price;

     }

 }

4.View

ProductForm.jsp

 <!DOCTYPE HTML>

 <html>

 <head>

 <title>Add Product Form</title>

 <style type="text/css">@import url(css/main.css);</style>

 </head>

 <body>

 <div id="global">

 <form action="product_save.action" method="post">

     <fieldset>

         <legend>Add a product</legend>

             <p>

                 <label for="name">Product Name: </label>

                 <input type="text" id="name" name="name"

                     tabindex="1">

             </p>

             <p>

                 <label for="description">Description: </label>

                 <input type="text" id="description"

                     name="description" tabindex="2">

             </p>

             <p>

                 <label for="price">Price: </label>

                 <input type="text" id="price" name="price"

                     tabindex="3">

             </p>

             <p id="buttons">

                 <input id="reset" type="reset" tabindex="4">

                 <input id="submit" type="submit" tabindex="5"

                     value="Add Product">

             </p>

     </fieldset>

 </form>

 </div>

 </body>

 </html>

ProductrDetails.jsp

 <!DOCTYPE HTML>

 <html>

 <head>

 <title>Save Product</title>

 <style type="text/css">@import url(css/main.css);</style>

 </head>

 <body>

 <div id="global">

     <h4>The product has been saved.</h4>

     <p>

         <h5>Details:</h5>

         Product Name: ${product.name}<br/>

         Description: ${product.description}<br/>

         Price: $${product.price}

     </p>

 </div>

 </body>

 </html>

5.测试应用

http://localhost:8080/app03a/product_input.action

5.View Resolver

View Resolver负责配置视图解析器

 <?xml version="1.0" encoding="UTF-8"?>

 <beans xmlns="http://www.springframework.org/schema/beans"

        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">

     <bean name="/product_input.action" class="app03b.controller.InputProductController"/>

     <bean name="/product_save.action" class="app03b.controller.SaveProductController"/>

     <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">

         <property name="prefix" value="/WEB-INF/jsp/"/>

         <property name="suffix" value=".jsp"/>

     </bean>

 </beans>

视图解析器配置了前缀和后缀两个属性：

view路径可以缩短，仅需提供myPage，无需在写/WEB-INF/jsp/myPage.jsp

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