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spring注解controller示例
依赖库 spring 3.0
配置web.xml文件如下：
<?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" version="3.0"> <display-name>mywork</display-name> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <servlet> <servlet-name>mywork</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>mywork</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <error-page> <error-code>404</error-code> <location>/404.jsp</location> </error-page></web-app>
1，mywork-servlet.xml使用传统Bean方式指定控制器方式如下（配置HandlerMapping与HandlerAdapter，需要指定路由map）
<?xml version="1.0" encoding="UTF-8"?><!-- Bean头部 --><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" 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-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"> <!-- HandlerMapping --> <bean class ="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" /> <!-- HandlerAdapter --> <bean class ="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" /> <!-- ViewResolver --> <bean class ="org.springframework.web.servlet.view.InternalResourceViewResolver" > <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <!-- curl http://127.0.0.1:8080/mywork/demo.php --> <bean name="/demo.php" class="com.ciaos.demo.DemoController"/> </beans>
controller中需要集成Controller类，并实现handleRequest接口
package com.ciaos.demo;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 DemoController implements Controller { @Override public ModelAndView handleRequest(HttpServletRequest req, HttpServletResponse resp) throws Exception { //1、收集参数、验证参数 //2、绑定参数到命令对象 //3、将命令对象传入业务对象进行业务处理 //4、选择下一个页面 ModelAndView mv = new ModelAndView(); //添加模型数据 可以是任意的POJO对象 mv.addObject("message", "Hello World!"); //设置逻辑视图名，视图解析器会根据该名字解析到具体的视图页面 mv.setViewName("hello"); // jsp/hello.jsp return mv; }}
2，mywork-servlet.xm使用注解方式如下
<?xml version="1.0" encoding="UTF-8"?><!-- Bean头部 --><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" 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-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"> <context:component-scan base-package="com.ciaos"/> <mvc:annotation-driven /> <mvc:resources mapping="/js/**" location="/WEB-INF/resource/js/"/> <mvc:resources mapping="/css/**" location="/WEB-INF/resource/css/"/> <!-- http://127.0.0.1:8080/mywork/css/test.css --> <!-- ViewResolver --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean></beans>
实现controller，指定路由
package com.ciaos.demo;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;@Controllerpublic class DemoController { @RequestMapping("/demo.index") public String index(Model model){ model.addAttribute("message", "hello world"); return "hello"; }}
jsp/hello.jsp代码如下：
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP ‘hello.jsp‘ starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="http://www.mamicode.com/styles.css"> --> </head> <body> ${message} </body></html>
spring注解controller示例
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