SpringMVC实例：制作一个人员列表

目标：制作一个人员列表，可通过人员的id进行修改。

界面1：

界面2：

界面3：

一.利用myEclipse导入spring的特性后，让applicationContext.xml在WebRoot下。

二.过程：

1.建立index.jsp界面，使用jstl注解。（知识点C标签）

 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 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'index.jsp' starting page</title>
13     <meta http-equiv="pragma" content="no-cache">
14     <meta http-equiv="cache-control" content="no-cache">
15     <meta http-equiv="expires" content="0">    
16     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
17     <meta http-equiv="description" content="This is my page">
18   </head>
19   
20   <body>
21       <h2>Adobocode : 世界你好</h2> 
22      <br/> 
23      <a href="<c:url value="personDisplay.htm"/>">人员列表</a> 
24   </body>
25 </html>

2.在web.xml配置分发器，走htm后缀的方法

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app version="2.5" 
 3     xmlns="http://java.sun.com/xml/ns/javaee" 
 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 5     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 6     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 7     
 8   <servlet>
 9       <servlet-name>springMVC</servlet-name>
10       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
11       <load-on-startup>1</load-on-startup>
12   </servlet>    
13     
14   <servlet-mapping>
15       <servlet-name>springMVC</servlet-name>
16       <url-pattern>*.htm</url-pattern>
17   </servlet-mapping>     
18     
19   <welcome-file-list>
20     <welcome-file>index.jsp</welcome-file>
21   </welcome-file-list>
22 </web-app>

3.配置springMVC-servlet.xml：第一次搭建时，报404错误，原来是下面这一行配置有误，prefix为路径的前缀，要扫描的view层是放在jsp文件下的，所以是value为/jsp/，只要路径弄错了就会报404.

<property name="prefix"><value>/jsp/</value></property>

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 
 3 <beans xmlns="http://www.springframework.org/schema/beans"
 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
 5     xmlns:context="http://www.springframework.org/schema/context"
 6     xsi:schemaLocation=" 
 7 http://www.springframework.org/schema/beans 
 8 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
 9 http://www.springframework.org/schema/context 
10 http://www.springframework.org/schema/context/spring-context-3.0.xsd">
11      <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/> 
12      <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> 
13      <context:component-scan base-package="paul.sydney.controller"/> 
14      <context:component-scan base-package="paul.sydney.service"/> 
15      <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 　　　
      　<!-- 视图解释类:将在Controller返回的ModelAndView的基础上,加上目录前缀/WEB-INF/jsp/, 加后文件名称后缀.jsp,由此等待下个页面 -->

16          <property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property> 
17          <property name="prefix"><value>/jsp/</value></property> 
18          <property name="suffix"><value>.jsp</value></property> 
19      </bean> 
20 </beans>

DispatcherServlet默认在/WEB-INF/中查找<servlet-name>-servlet.xml,使用该配置文件初始化DispatcherServlet上下文对应的子spring容器，spring mvc3可以在-servlet.xml，自动扫描各个包，在此扫描controller/service两个包，返回视图层：jsp文件夹下面的.jsp后缀文件。有篇很好的介绍：http://www.open-open.com/lib/view/open1402751642806.html

4.model层，bean

 1 package paul.sydney.model;
 2 
 3 public class Person {
 4     private int id;
 5     private String name;
 6     private int age;
 7     private String address;
 8 
 9     public int getId() {
10         return id;
11     }
12 
13     public void setId(int id) {
14         this.id = id;
15     }
16 
17     public String getName() {
18         return name;
19     }
20 
21     public void setName(String name) {
22         this.name = name;
23     }
24 
25     public int getAge() {
26         return age;
27     }
28 
29     public void setAge(int age) {
30         this.age = age;
31     }
32 
33     public String getAddress() {
34         return address;
35     }
36 
37     public void setAddress(String address) {
38         this.address = address;
39     }
40 
41     @Override
42     public String toString() {
43         StringBuilder sb = new StringBuilder();
44         sb.append("
name:" + this.name);
45         sb.append("
age:" + this.age);
46         sb.append("
address:" + this.address);
47 
48         return sb.toString();
49 
50     }
51 }

5.servlet层，这里使用一些伪造的数据

 1 package paul.sydney.service;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 
 6 import org.springframework.stereotype.Service;
 7 
 8 import paul.sydney.model.Person;
 9 
10 @Service
11 public class DummyService {
12     public List<Person> getDummyList() {
13         System.err.println("111111");
14         List<Person> list = new ArrayList<Person>();
15         Person p1 = new Person();
16         p1.setId(123);
17         p1.setName("ami");
18         p1.setAge(23);
19         p1.setAddress("Nzland");
20         Person p2 = new Person();
21         p2.setId(321);
22         p2.setName("heha");
23         p2.setAge(21);
24         p2.setAddress("England");
25         list.add(p1);
26         list.add(p2);
27         
28         return list;
29     }
30     public Person retrievePerson(int id) {
31         System.err.println("123456");
32         Person person = new Person(); 
33         person.setId(56789); 
34         person.setName("Nikki"); 
35         person.setAge(63); 
36         person.setAddress("Dalaguete, Cebu"); 
37         return person; 
38     }
39     
40      public void savePerson(Person person) { 
41             System.out.println("

Saving" + person); 
42         } 
43 }

6.controller层，有两个控制器：

数据的获取：

 1 package paul.sydney.controller;
 2 
 3 import org.springframework.beans.factory.annotation.Autowired;
 4 import org.springframework.stereotype.Controller;
 5 import org.springframework.ui.ModelMap;
 6 import org.springframework.web.bind.annotation.RequestMapping;
 7 
 8 import paul.sydney.service.DummyService;
 9 
10 @Controller 
11 public class PersonDisplay {
12 
13     private final DummyService dummyService;
14 
15     @Autowired 
16     public PersonDisplay(DummyService dummyService) {
17         
18         this.dummyService = dummyService; 
19     }
20 
21     @RequestMapping("/personDisplay.htm") 
22     public ModelMap defaultHandler() {
23         return new ModelMap("personList", this.dummyService.getDummyList()); 
24     } 
25 }

index.jsp的地址映射/personDisplay.htm，将从数据层找到的数据存储在ModelMap内，类似kv的数据结构。

点击id，进入数据的form：

 1 package paul.sydney.controller;
 2 
 3 import javax.net.ssl.SSLEngineResult.Status;
 4 
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.stereotype.Controller;
 7 import org.springframework.ui.ModelMap;
 8 import org.springframework.validation.BindingResult;
 9 import org.springframework.web.bind.annotation.ModelAttribute;
10 import org.springframework.web.bind.annotation.RequestMapping;
11 import org.springframework.web.bind.annotation.RequestMethod;
12 import org.springframework.web.bind.annotation.RequestParam;
13 import org.springframework.web.bind.annotation.SessionAttributes;
14 import org.springframework.web.bind.support.SessionStatus;
15 
16 import paul.sydney.model.Person;
17 import paul.sydney.service.DummyService;
18 
19 
20 @Controller 
21 @RequestMapping("/personForm.htm") 
22 @SessionAttributes("person") 
23 public class PersonForm {
24 
25     private final DummyService dummyService;
26 
27     @Autowired 
28     public PersonForm(DummyService dummyService) { 
29         this.dummyService = dummyService; 
30     }
31 
32     @RequestMapping(method = RequestMethod.GET) 
33     public String setupForm(@RequestParam("personId") int id, ModelMap model) { //用requestparam绑定personId这个url值，赋给id
34         Person person = this.dummyService.retrievePerson(id); 
35         model.addAttribute("person", person); 
36         return "personForm"; 
37     }
38 
39     @RequestMapping(method = RequestMethod.POST) 
40     public String processSubmit(@ModelAttribute("person") Person person, 
41             BindingResult result, SessionStatus status) {
42         System.err.println("redirect");
43         this.dummyService.savePerson(person); 
44         status.setComplete(); 
45         return "redirect:personDisplay.htm"; 
46     } 
47 }

7.在WebRoot下建jsp文件夹：建两个jsp文件：personDisplay.jsp personForm.jsp

personDisplay.jsp

 1 <%@ page language="java" session="false"
 2     contentType="text/html; charset=UTF-8"%>
 3 
 4 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 5 
 6 <jsp:useBean id="personList" scope="request"
 7     type="java.util.List<paul.sydney.model.Person>" />
 8 <html>
 9     <head>
10         <title>Adobocode : Sample Spring MVC using JSTL iteration</title>
11     </head>
12     <body>
13         <h2>
14             &nbsp; Adobocode : Person List 明明用了JSTL啊！
15         </h2>
16         <table border="1">
17             <tr>
18                 <th>
19                     Id
20                 </th>
21                 <th>
22                     Name
23                 </th>
24                 <th>
25                     Age
26                 </th>
27                 <th>
28                     Address
29                 </th>
30             </tr>
31             <c:forEach var="p" items="${personList}">
32                 <tr>
33                     <td>
34                         <c:url var="editUrl" value="personForm.htm">
35                             <c:param name="personId" value="${p.id}" />
36                         </c:url>
37                         <a href='<c:out value="${editUrl}"/>'>${p.id}</a>
38                     </td>
39                     <td>
40                         ${p.name}
41                     </td>
42                     <td>
43                         ${p.age}
44                     </td>
45                     <td>
46                         ${p.address}
47                     </td>
48                 </tr>
49             </c:forEach>
50         </table>
51     </body>
52 </html>

personForm.jsp

 1 <%@ page language="java" session="false"
 2     contentType="text/html; charset=UTF-8"%>
 3 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
 4 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
 5 <html>
 6     <head>
 7         <title>Adobocode : Sample Spring MVC using Forms</title>
 8     </head>
 9 
10     <body>
11         <h2>
12             Adobocode : Person Form
13         </h2>
14         <form:form modelAttribute="person">
15             <form:hidden path="id" />
16             <fieldset>
17                 <table>
18                     <tr>
19                         <td>
20                             Name名字！
21                         </td>
22                         <td>
23                             <form:input path="name" />
24                         </td>
25                     </tr>
26                     <tr>
27                         <td>
28                             Age年龄！
29                         </td>
30                         <td>
31                             <form:input path="age" />
32                         </td>
33                     </tr>
34                     <tr>
35                         <td>
36                             Address地址！
37                         </td>
38                         <td>
39                             <form:input path="address" />
40                         </td>
41                     </tr>
42                     <tr>
43                         <td>
44                             咆哮体！！！
45                         </td>
46                         <td>
47                             <input type="submit" id="save" name="_eventId_save" value="Save" />
48                             <input type="submit" onClick="history.go(-1);"
49                                 name="_eventId_cancel" value="Cancel" />
50                         </td>
51                     </tr>
52                 </table>
53             </fieldset>
54         </form:form>
55     </body>
56 </html>

8.部署在tomcat下运行。