SpringMVC：走通一个SpringMVC

我们现在使用SpringMVC来做一个小的用户管理系统，由于重点在学习SpringMVC，这里我们就不用数据库了，直接把用户的信息写在一个Map中。

1.创建User类，放在org.h3c.model包中

package org.h3c.model;

import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.NotEmpty;
import org.hibernate.validator.constraints.Range;

public class User {
    private int id;
    private String username;
    private String password;
    private String nickname;
//    private Group group;

    public User() {
        super();
        // TODO Auto-generated constructor stub
    }
    public User(String username, String password, String nickname) {
        super();
        this.username = username;
        this.password = password;
        this.nickname = nickname;
    }

    public User(int id, String username, String password, String nickname) {
        super();
        this.id = id;
        this.username = username;
        this.password = password;
        this.nickname = nickname;
    }
//    public Group getGroup() {
//        return group;
//    }
//    public void setGroup(Group group) {
//        this.group = group;
//    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    @NotEmpty(message="用户名不能为空！")
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    @Size(min=1,max=10,message="密码的长度应该在1-10位之间！")
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getNickname() {
        return nickname;
    }
    public void setNickname(String nickname) {
        this.nickname = nickname;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", username=" + username + ", password="
                + password + ", nickName=" + nickname + ", group="
//                + group
                + "]";
    }

}

2.创建LoginController和UserController，放在org.h3c.controller包中

3.编写web.xml

<?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"
    id="WebApp_ID" version="3.0">
    <display-name>SSM</display-name>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:beans.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
<!--             <param-value>classpath:spring-mvc.xml</param-value> -->
            <param-value>/WEB-INF/spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
        <!--字符编码-->
    <filter>
        <filter-name>CharacterFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

3.编写spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">

    <mvc:annotation-driven/>
    <context:component-scan base-package="org.h3c.controller"/>
    <mvc:resources mapping="/images/**" location="/images/" />
    <mvc:resources mapping="/css/**" location="/css/" />

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 据说3.0.5之后，下面这句话可以不要，为了保险起见还是加上吧！ -->
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!-- 配置前缀，此处前缀代表的是页面放在/WEB-INF/jsp文件夹下面 -->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!-- 配置后缀，文件后缀为.jsp -->
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

4.编写jsp页面---list.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>用户列表</title>
</head>
<body>
    <a href="add" >link</a>
    <br/>
    <c:forEach items="${users }" var="userMap">
        ${userMap.key }----><a href="${userMap.value.username }">${userMap.value.username }</a>----->${userMap.value.password }---->${userMap.value.nickname }
        </br>
    </c:forEach>
</body>
</html>