springmvc的3中路径风格

1.导入相应的jar包,文件放置情况

2.web.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <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">
 3   <display-name>springmvc7</display-name>
 4   <welcome-file-list>
 5     <welcome-file>index.jsp</welcome-file>
 6   </welcome-file-list>
 7   <servlet>
 8       <servlet-name>mvc-dispatcher</servlet-name>
 9       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
10       <!-- DispatcherServlet对应的上下文配置,默认/WEB-INF/$servlet-name$-servlet.xml
11           下面配置spring-mvc的核心配置文件
12        -->
13        <init-param>
14            <param-name>contextConfigLocation</param-name>
15            <param-value>/WEB-INF/configs/spring/mvc-dispatcher-servlet.xml</param-value>
16        </init-param>
17       <load-on-startup>1</load-on-startup>
18   </servlet>
19   <servlet-mapping>
20       <servlet-name>mvc-dispatcher</servlet-name>
21       <!-- mvc-dispatcher 拦截所有的请求 -->
22       <url-pattern>/</url-pattern>
23   </servlet-mapping>
24   
25   
26 </web-app>

3.mvc-dispatcher-servlet.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans" 
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 4     xmlns:p="http://www.springframework.org/schema/p" 
 5     xmlns:context="http://www.springframework.org/schema/context" 
 6     xmlns:mvc="http://www.springframework.org/schema/mvc"
 7     xmlns:tx="http://www.springframework.org/schema/tx"
 8     xmlns:aop="http://www.springframework.org/schema/aop"
 9     xsi:schemaLocation="  
10         http://www.springframework.org/schema/beans 
11         http://www.springframework.org/schema/beans/spring-beans.xsd 
12         http://www.springframework.org/schema/context 
13         http://www.springframework.org/schema/context/spring-context.xsd 
14         http://www.springframework.org/schema/mvc
15         http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd        
16         http://www.springframework.org/schema/tx
17         http://www.springframework.org/schema/tx/spring-tx.xsd
18         http://www.springframework.org/schema/aop
19         http://www.springframework.org/schema/aop/spring-aop.xsd">
20 
21 <!-- 激活
22      @Required
23      @Autowired,jsr250's
24      @PostConstruct,
25      @PreDestroy and @ Resource等标注
26  -->
27 <context:annotation-config />
28 <!-- 
29     DispatcherServlet上下文,只搜索@Controller标注的类,不搜索其他标注的类
30  -->
31 <context:component-scan base-package="com.gys.mvcdemo">
32     <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
33 </context:component-scan>
34 
35 <!-- 
36     
37     HandlerMapping无需配置,Spring MVC可以默认启动
38  -->
39  <!-- 
40      扩充了注解驱动,可以将请求参数绑定到控制器参数
41     启用基于annotation的handlerMapping.
42   -->
43 <mvc:annotation-driven />
44 
45 <!-- 
46     静态资源处理,css,js,imgs
47  -->
48 <mvc:resources location="/resources/" mapping="/resources/**"/>
49 
50 
51 <!-- 视图解析器 -->
52 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
53     <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
54     <property name="prefix" value="/WEB-INF/jsps/" />
55     <property name="suffix" value=".jsp" />
56 </bean>
57 
58 
59 </beans>

Course.java

 1 package com.gys.mvcdemo.model;
 2 
 3 public class Course {
 4     //课程IDd
 5     private Integer courseId;
 6     //课程名称
 7     private String title;
 8 //图片路径    
 9     private String imgPath;
10     //学习人数
11     private Integer learningNum;
12     //课程时长
13     private Long duration;
14     //课程难度
15     private Integer level;
16     //课程描述
17     private String levelDesc;
18     //课程介绍
19     private String descr;
20     public Integer getCourseId() {
21         return courseId;
22     }
23     public void setCourseId(Integer courseId) {
24         this.courseId = courseId;
25     }
26     public String getTitle() {
27         return title;
28     }
29     public void setTitle(String title) {
30         this.title = title;
31     }
32     public String getImgPath() {
33         return imgPath;
34     }
35     public void setImgPath(String imgPath) {
36         this.imgPath = imgPath;
37     }
38     public Integer getLearningNum() {
39         return learningNum;
40     }
41     public void setLearningNum(Integer learningNum) {
42         this.learningNum = learningNum;
43     }
44     public Long getDuration() {
45         return duration;
46     }
47     public void setDuration(Long duration) {
48         this.duration = duration;
49     }
50     public Integer getLevel() {
51         return level;
52     }
53     public void setLevel(Integer level) {
54         this.level = level;
55     }
56     public String getLevelDesc() {
57         return levelDesc;
58     }
59     public void setLevelDesc(String levelDesc) {
60         this.levelDesc = levelDesc;
61     }
62     public String getDescr() {
63         return descr;
64     }
65     public void setDescr(String descr) {
66         this.descr = descr;
67     }
68     
69     
70     
71     
72 }

CourseService.java

1 package com.gys.mvcdemo.service;
2 
3 import com.gys.mvcdemo.model.Course;
4 
5 public interface CourseService {
6     Course getCoursebyId(Integer courseId);
7 }

CourseServiceImpl.java

 1 package com.gys.mvcdemo.service.impl;
 2 
 3 import org.springframework.stereotype.Service;
 4 
 5 import com.gys.mvcdemo.model.Course;
 6 import com.gys.mvcdemo.service.CourseService;
 7 
 8 @Service("courseService")
 9 public class CourseServiceImpl implements CourseService{
10 
11     @Override
12     public Course getCoursebyId(Integer courseId) {
13         Course course=new Course();
14         course.setCourseId(courseId);
15         course.setTitle("深入浅出Java多线程");
16         course.setImgPath("1.jpg");
17         course.setLearningNum(123465);
18         course.setLevel(2);
19         course.setLevelDesc("中级");
20         course.setDuration(7200L);
21         course.setDescr("多线程是日常开发中的常用知识...........");
22         return course;
23     }
24 }

CourseController.java

 1 package com.gys.mvcdemo.controller;
 2 
 3 import java.util.Map;
 4 
 5 import javax.servlet.http.HttpServletRequest;
 6 import javax.servlet.http.HttpServletResponse;
 7 
 8 import org.springframework.beans.factory.annotation.Autowired;
 9 import org.springframework.stereotype.Controller;
10 import org.springframework.ui.Model;
11 import org.springframework.web.bind.annotation.PathVariable;
12 import org.springframework.web.bind.annotation.RequestMapping;
13 import org.springframework.web.bind.annotation.RequestMethod;
14 import org.springframework.web.bind.annotation.RequestParam;
15 
16 import com.gys.mvcdemo.model.Course;
17 import com.gys.mvcdemo.service.CourseService;
18 
19 @Controller
20 @RequestMapping("/courses")
21 public class CourseController {
22     
23     private CourseService courseService;
24 
25     @Autowired
26     public void setCourseService(CourseService courseService) {
27         this.courseService = courseService;
28     }
29     
30     // /courses/vies?courseId=123
31     @RequestMapping(value="/view",method=RequestMethod.GET)
32     public String viewCourse(Model model,@RequestParam("courseId") Integer courseId){
33         Course course=courseService.getCoursebyId(courseId);
34         model.addAttribute(course);
35         return "course_overview";
36     }
37     // courses/view2/{courseId}
38     @RequestMapping(value="/view2/{courseId}",method=RequestMethod.GET)
39     public String viewCourse2(@PathVariable("courseId") Integer courseId,Map<String, Object> model){
40         Course course=courseService.getCoursebyId(courseId);
41         model.put("course",course);
42         return "course_overview";
43     }
44     
45     // courses/view3?courseId=3
46     @RequestMapping("view3")
47     public String viewCourse3(HttpServletRequest request,HttpServletResponse response){
48         Integer courseId=Integer.valueOf(request.getParameter("courseId"));
49         Course course=courseService.getCoursebyId(courseId);
50         request.setAttribute("course", course);
51         return "course_overview";
52     }
53     
54     
55     
56 }

course_overview.jsp

 1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'course_overview.jsp' starting page</title>
13     <link rel="stylesheet" type="text/css" href="<%=request.getContextPath()%>/resources/css/main.css">
14   </head>
15   
16   <body>
17     <h2>id:${course.courseId }</h2>
18     <h2>title:${course.title }</h2>
19     <h2>imgPath:<img src="<%=path %>/resources/img/${course.imgPath }" /></h2>
20     <h2>learningNum:${course.learningNum }</h2>
21     <h2>duration:${course.duration }</h2>
22     <h2>level:${course.level }</h2>
23     <h2>levelDesc:${course.levelDesc }</h2>
24      <h2>descr:${course.descr }</h2>
25   </body>
26 </html>

用三种路径测试:

http://localhost:8080/springmvc7/courses/view?courseId=1

http://localhost:8080/springmvc7/courses/view2/2

http://localhost:8080/springmvc7/courses/view3?courseId=3