spring MVC实现增加与查询-

1.运行环境

idea 2017.3.5 & java 1.9 & Tomcat 8.5.31

文件布局

2.实现在网页上如图

<1>登录添加页面端口号/add

<2>添加成功后

<3>查看添加信息

<4> 查询更多

3.运行原理

发请求--》web.xml-》控制器UserController（处理服务）-》dispatcher -servlet.xml 转发服务 -》视图 *.jsp-》显示

4.代码详情

web.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
 5          version="4.0">
 6     <context-param>
 7         <param-name>contextConfigLocation</param-name>
 8         <param-value>/WEB-INF/applicationContext.xml</param-value>
 9     </context-param>
10     <listener>
11         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
12     </listener>
13     <servlet>
14         <servlet-name>dispatcher</servlet-name>
15         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
16         <load-on-startup>1</load-on-startup>
17     </servlet>
18     <servlet-mapping>
19         <servlet-name>dispatcher</servlet-name>
20 <!--只能通过后缀名是.mvc 访问   -->
21         <url-pattern>*.mvc</url-pattern>
22     </servlet-mapping>
23 
24 
25 </web-app>

web文件配置

实体类

 1 #Gender.java
 2 package ke_1014.cn.ccut.domain;
 3 public enum Gender {
 4     MALE,
 5     FEMALE;
 6 }
 7 
 8 
 9 #User.java
10 package ke_1014.cn.ccut.domain;
11 public class User {
12     private String name;
13     private String lastname;
14     private String password;
15     private String detail;
16     //@DateTimeFormat(pattern="yyyy-MM-dd")
17     private String birthDate;
18     private Gender gender;
19     private String country;
20     private boolean nonSmoking;
21 
22     public String getName() {
23         return name;
24     }
25 
26     public void setName(String name) {
27         this.name = name;
28     }
29 
30     public String getLastname() {
31         return lastname;
32     }
33 
34     public void setLastname(String lastname) {
35         this.lastname = lastname;
36     }
37     
38     public String getPassword() {
39         return password;
40     }
41 
42     public void setPassword(String password) {
43         this.password = password;
44     }
45 
46     public String getDetail() {
47         return detail;
48     }
49 
50     public void setDetail(String detail) {
51         this.detail = detail;
52     }
53 
54     public String getBirthDate() {
55         return birthDate;
56     }
57 
58     public void setBirthDate(String birthDate) {
59         this.birthDate = birthDate;
60     }
61 
62     public Gender getGender() {
63         return gender;
64     }
65 
66     public void setGender(Gender gender) {
67         this.gender = gender;
68     }
69 
70     public String getCountry() {
71         return country;
72     }
73 
74     public void setCountry(String country) {
75         this.country = country;
76     }
77     public boolean isNonSmoking() {
78         return nonSmoking;
79     }
80     public void setNonSmoking(boolean nonSmoking) {
81         this.nonSmoking = nonSmoking;
82     }
83 }

对应实体类

UserController.java

 1 package ke_1014.cn.ccut.controller;
 2 import java.util.HashMap;
 3 import java.util.Map;
 4 import org.springframework.stereotype.Controller;
 5 import org.springframework.web.bind.annotation.RequestMapping;
 6 import org.springframework.web.servlet.ModelAndView;
 7 import ke_1014.cn.ccut.domain.Gender;
 8 import ke_1014.cn.ccut.domain.User;
 9 @Controller
10 public class UserController {
11     private static final String[] countries = { "China","Turkey", "United States", "Germany" };
12     Map<String,User> mp=new HashMap<String,User>();
13     //加载页面信息
14     @RequestMapping(value ="/add")
15     public ModelAndView add() {
16         ModelAndView modelAndView = new ModelAndView("useradd", "user", new User());
17         modelAndView.addObject("genders", Gender.values());
18         modelAndView.addObject("countries", countries);        
19         return modelAndView;
20     }
21     //查询当前用户信息
22     @RequestMapping(value = "/selectU")
23     public ModelAndView processUser(String  name) {
24         ModelAndView modelAndView = new ModelAndView();
25         modelAndView.setViewName("selectUser");
26         modelAndView.addObject("u", mp.get(name));
27         return modelAndView;
28     }
29     //添加一个用户
30     @RequestMapping(value = "/addok")
31     public ModelAndView processUser1(User user) {
32         mp.put(user.getName(), user);
33         System.out.println(mp.size());
34         ModelAndView modelAndView = new ModelAndView();
35         modelAndView.setViewName("addok");
36         modelAndView.addObject("u", user);    
37         return modelAndView;
38     }
39     //查询添加的所有
40     @RequestMapping(value = "/selectA")
41     public ModelAndView processselectA() {
42         ModelAndView modelAndView =new ModelAndView();
43         modelAndView.setViewName("selectAll");
44         modelAndView.addObject("u",mp);
45         return modelAndView;
46     }
47 //查询指定用户
48     @RequestMapping(value = "/selectB")
49         public ModelAndView processselectB() {
50         
51             ModelAndView modelAndView =new ModelAndView();
52             modelAndView.setViewName("selectAll");
53             User use1=mp.get("456");
54             modelAndView.addObject("u",use1 );
55             return modelAndView;
56         }
57 }

UserController

web-infpages

useradd.jsp

 1 <%@ page contentType="text/html; charset=utf-8" %>
 2 <%@taglib uri="http://www.springframework.org/tags/form" prefix="mvc" %>
 3 <html>
 4 <head>
 5     <title>用户添加</title>
 6 </head>
 7 <body><center>
 8 
 9 <h2>用户添加表单</h2>
10 <mvc:form modelAttribute="user" action="addok.mvc">
11     <table>
12         <tr>
13             <td><mvc:label path="name">用户名：</mvc:label></td>
14             <td><mvc:input path="name" /></td>
15         </tr>
16         <tr>
17             <td><mvc:label path="lastname">姓</mvc:label></td>
18             <td><mvc:input path="lastname" /></td>
19         </tr>
20         <tr>
21             <td><mvc:label path="password">密码</mvc:label></td>
22             <td><mvc:password path="password" /></td>
23         </tr>
24            <tr>
25             <td><mvc:label path="detail">用户详情</mvc:label></td>
26             <td><mvc:textarea path="detail" /></td>
27         </tr>
28         <tr>
29             <td><mvc:label path="birthDate">出生日期 </mvc:label></td>
30             <td><mvc:input path="birthDate" /></td>
31         </tr>
32         <tr>
33             <td><mvc:label path="gender">性别</mvc:label></td>
34             <td><mvc:radiobuttons path="gender" items="${genders}" /></td>
35         </tr>
36         <tr>
37             <td><mvc:label path="country">城市</mvc:label></td>
38             <td><mvc:select path="country" items="${countries}" /></td>
39         </tr>
40         <tr>
41             <td><mvc:label path="nonSmoking">吸烟不</mvc:label></td>
42             <td><mvc:checkbox path="nonSmoking" /></td>
43         </tr>
44         <tr>
45             <td colspan="2">
46                 <input type="submit" value="Submit" />
47             </td>
48         </tr>
49     </table>  
50 </mvc:form></center>
51 </body>
52 </html>

用户添加页面

addok.jsp

1 <%@ page contentType="text/html; charset=UTF-8" %>
2 <%@taglib uri="http://www.springframework.org/tags/form" prefix="mvc" %>
3 <html><center>
4 姓名：${u.name}  添加成功!<br />
5 <button> <a href="selectU.mvc?name=${u.name}">查看这个姓名的更多信息</a><br /></button>
6 <button> <a href="selectA.mvc">查看所有已添加用户信息</a></button>
7  </center>
8     </body>
9 </html>

用户添加成功页面

selectUser.jsp

 1 <%@ page contentType="text/html; charset=UTF-8" %>
 2 <%@taglib uri="http://www.springframework.org/tags/form" prefix="mvc" %>
 3 <html>
 4 <head><center>
 5     <title>成功添加</title>
 6 </head>
 7 <body>
 8     <h2>用户添加结果</h2>
 9     <table>
10         <tr>
11             <td>姓名</td>
12             <td>${u.name}</td>
13         </tr>
14         <tr>
15             <td>姓</td>
16             <td>${u.lastname}</td>
17         </tr>
18         <tr>
19             <td>用户密码</td>
20             <td>${u.password}</td>
21         </tr>
22         <tr>
23             <td>用户详情</td>
24             <td>${u.detail}</td>
25         </tr>
26         <tr>
27             <td>出生日期</td>
28             <td>${u.birthDate}</td>
29         </tr>
30         <tr>
31             <td>性别</td>
32             <td>${u.gender}</td>
33         </tr>
34         <tr>
35             <td>城市</td>
36             <td>${u.country}</td>
37         </tr>
38         <tr>
39             <td>不吸烟</td>
40             <td>${u.nonSmoking}</td>
41         </tr>
42     </table>
43     <button><a href="add.mvc">继续添加</a> </button>
44     <button> <a href="selectA.mvc">查看所有已添加用户信息</a></button>
45 
46 </body>
47 </body>
48 </html>

查询当前用户

selectAll.jsp

 1 <%@ page contentType="text/html; charset=UTF-8" %>
 2 <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 3 <%@taglib uri="http://www.springframework.org/tags/form" prefix="mvc"   %>
 4 <html><center>
 5 <head>
 6     <title>成功添加</title>
 7 </head>
 8 <body>
 9     <h2>用户添加结果</h2>
10     <table  border="1" >
11         <tr>
12             <th>姓名</th>
13             <th>用户密码</th>
14             <th>城市</th>
15             <%--<c:forEach var="item" items=" ${u.keySet()}">--%>
16         </tr>
17             <c:forEach var="item" items="${u}">
18             <tr>
19                 <%--<td>${item.key}</td>--%>
20                 <td>${item.value.name} </td>
21                 <td>${item.value.password}</td>
22                     <td>${item.value.country}</td>
23            </tr>
24             </c:forEach>
25     </table><br />
26     <button><a href="add.mvc">继续添加</a> </button>
27 </body>
28     </center>
29 </html>

查询添加所有用户信息