springmvc笔记(基本配置,核心文件,路径,参数,文件上传,json整合)

首先导入jar包

大家注意一下我的springmvc,jackson,common-up的jar包版本.其他版本有可能出现不兼容.

src文件:

webroot目录:

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>

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 <!-- 配置上传文件代码,导入commons-fileupload-1.2.2.jar,commons-io-2.4.jar
59     200*1024*1024即200M resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常
60  -->
61 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
62     <!-- 上传的最大限制 -->
63     <property name="maxUploadSize" value="209715200" />
64     <!-- 默认编码 -->
65     <property name="defaultEncoding" value="UTF-8" />
66     <!-- 上传文件的解析 -->
67     <property name="resolveLazily" value="true" />
68 </bean>
69 
70 <!-- 整合json,导入jackson-core-asl-1.1.2.jar,jackson-mapper-asl-1.1.2.jar
71     配置ViewResolver.
72     可以用多个ViewResolver.使用order属性排序.InternalResourceViewResolver放在最后
73  -->
74 <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
75     <property name="order" value="1" />
76     <property name="mediaTypes">
77         <map>
78             <entry key="json" value="application/json" />
79             <entry key="xml" value="application/xml" />
80             <entry key="htm" value="text/html" />
81         </map>
82     </property>
83     <property name="defaultViews">
84         <list>
85         <!-- JSON View -->
86             <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"></bean>
87         </list>
88     </property>
89     <property name="ignoreAcceptHeader" value="true" />
90 </bean>
91 </beans>

上传文件的页面:

file.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>上传页面</title>
13 
14   </head>
15   
16   <body>
17     <h1>上传附件</h1>
18     <form method="post" action="<%=path %>/courses/doUpload" enctype="multipart/form-data">
19         <input type="file" name="file" /><br/>
20         <input type="submit" value="上传" />
21     </form>
22     
23   </body>
24 </html>

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 }

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 }

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 }

CourseController.java

  1 package com.gys.mvcdemo.controller;
  2 
  3 import java.io.File;
  4 import java.io.IOException;
  5 import java.util.Map;
  6 
  7 import javax.annotation.Resource;
  8 import javax.servlet.http.HttpServletRequest;
  9 import javax.servlet.http.HttpServletResponse;
 10 
 11 import org.apache.commons.io.FileUtils;
 12 import org.springframework.beans.factory.annotation.Autowired;
 13 import org.springframework.http.HttpStatus;
 14 import org.springframework.http.ResponseEntity;
 15 import org.springframework.stereotype.Controller;
 16 import org.springframework.ui.Model;
 17 import org.springframework.web.bind.annotation.PathVariable;
 18 import org.springframework.web.bind.annotation.RequestMapping;
 19 import org.springframework.web.bind.annotation.RequestMethod;
 20 import org.springframework.web.bind.annotation.RequestParam;
 21 import org.springframework.web.bind.annotation.ResponseBody;
 22 import org.springframework.web.multipart.MultipartFile;
 23 
 24 import com.gys.mvcdemo.model.Course;
 25 import com.gys.mvcdemo.service.CourseService;
 26 
 27 @Controller
 28 @RequestMapping("/courses")
 29 public class CourseController {
 30     
 31     private CourseService courseService;
 32 
 33     @Autowired
 34     public void setCourseService(CourseService courseService) {
 35         this.courseService = courseService;
 36     }
 37     
 38     /**
 39      * 路径一
 40      *  /courses/vies?courseId=123
 41      * @param model
 42      * @param courseId
 43      * @return
 44      */
 45     @RequestMapping(value="/view",method=RequestMethod.GET)
 46     public String viewCourse(Model model,@RequestParam("courseId") Integer courseId){
 47         Course course=courseService.getCoursebyId(courseId);
 48         model.addAttribute(course);
 49         return "course_overview";
 50     }
 51     /**
 52      * 路径二
 53      *  courses/view2/{courseId}
 54      * @param courseId
 55      * @param model
 56      * @return
 57      */
 58     @RequestMapping(value="/view2/{courseId}",method=RequestMethod.GET)
 59     public String viewCourse2(@PathVariable("courseId") Integer courseId,Map<String, Object> model){
 60         Course course=courseService.getCoursebyId(courseId);
 61         model.put("course",course);
 62         return "course_overview";
 63     }
 64     
 65     /**
 66      * 路径三
 67      *  courses/view3?courseId=3
 68      * @param request
 69      * @param response
 70      * @return
 71      */
 72     @RequestMapping("view3")
 73     public String viewCourse3(HttpServletRequest request,HttpServletResponse response){
 74         Integer courseId=Integer.valueOf(request.getParameter("courseId"));
 75         Course course=courseService.getCoursebyId(courseId);
 76         request.setAttribute("course", course);
 77         return "course_overview";
 78     }
 79     /**
 80      * 路径四
 81      * courses/admin?add
 82      * @return
 83      */
 84     @RequestMapping(value="/admin",method=RequestMethod.GET,params="add")
 85     public String createCourse(){
 86         
 87         return "course_admin/edit";
 88     }
 89     /**
 90      * 服务器内部跳转
 91      * @param course
 92      * @return
 93      */
 94     @RequestMapping(value="/save",method=RequestMethod.POST)
 95     public String doSave(Course course){
 96         course.setCourseId(123);
 97         //跳转
 98         return "redirect:view2/"+course.getCourseId();
 99     }
100     /**
101      * 上传页面
102      * @return
103      */
104     @RequestMapping(value="/upload",method=RequestMethod.GET)
105     public String showUploadPage(){
106         return "course_admin/file";
107     }
108     /**
109      * 上传文件
110      * @param file
111      * @return
112      * @throws IOException
113      */
114     @RequestMapping(value="/doUpload",method=RequestMethod.POST)
115     public String doUploadFile(@RequestParam("file") MultipartFile file) throws IOException{
116         if(!file.isEmpty()){
117             System.out.println("提示:"+file.getOriginalFilename());
118             FileUtils.copyInputStreamToFile(file.getInputStream(), new File("d:\upload\",System.currentTimeMillis()+file.getOriginalFilename()));
119         }
120         return "success";
121     }
122     /**
123      * 向前台返回json1
124      * @param courseId
125      * @return
126      */
127     @RequestMapping(value="/{courseId}",method=RequestMethod.GET)
128     public @ResponseBody Course getCoruseInJson(@PathVariable("courseId") Integer courseId){
129         return courseService.getCoursebyId(courseId);
130     }
131     /**
132      * 向前台返回json2
133      * @param courseId
134      * @return
135      */
136     @RequestMapping(value="/jsontype/{courseId}",method=RequestMethod.GET)
137     public ResponseEntity<Course> getCoruseInJson2(@PathVariable("courseId") Integer courseId){
138         Course course=courseService.getCoursebyId(courseId);
139         return new ResponseEntity<Course>(course,HttpStatus.OK);
140     }
141     
142 }

完了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!