spring mvc开发 (一)

1.配置web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	<display-name></display-name>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	<filter>
		<filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

	<servlet>
		<servlet-name>user</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>user</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

2.配置servlet文件

<?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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<mvc:annotation-driven />
	<context:component-scan base-package="com.yaodian.lmis.controller"></context:component-scan>
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass"
			value="org.springframework.web.servlet.view.JstlView" />
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

3.实体对象

import javax.validation.constraints.Pattern;

import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.NotEmpty;

 public class User {
	private String username;
	private String nickname;
	private String password;
	private String email;

	public User() {
		super();
	}

	public User(String username, String nickname, String password, String email) {
		super();
		this.username = username;
		this.nickname = nickname;
		this.password = password;
		this.email = email;
	}
    @NotEmpty(message="用户名不能为空!")
	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getNickname() {
		return nickname;
	}

	public void setNickname(String nickname) {
		this.nickname = nickname;
	}
	@NotEmpty(message="密码不能为空!")
    @Size(min=3,max=10,message="密码的长度必须大于3小于10")
	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}
    @Pattern(regexp="(\\w+\\.*)\\w+@\\w+\\.[a-zA-Z]{2,6}",message="邮箱的格式不正确!")
	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}
}

4.控制器

package com.yaodian.lmis.controller;

import java.util.HashMap;

import java.util.Map;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

import com.yaodian.lmis.entity.User;


@Controller
@RequestMapping("/user")
public class UserController {
	private final static Map<String, User> users = new HashMap<String, User>();

	public UserController() {
		users.put("ldh", new User("ldh", "刘德华", "123", "123123"));
		users.put("zxy", new User("zxy", "张学友", "123", "123123"));
		users.put("gfc", new User("gfc", "郭富城", "123", "123123"));
		users.put("lm", new User("lm", "黎明", "123", "123123"));
	}

	@RequestMapping("/users")
	public String list(Model model) {
		System.out.println(users.size());
		model.addAttribute("users", users);
		return "user/list";

	}

	@RequestMapping(value = "/add", method = RequestMethod.GET)
	public String add(Model model) {
		System.out.println("--------1----------");
		model.addAttribute(new User());
		return "user/add";
	}

	@RequestMapping(value = "/add", method = RequestMethod.POST)
	public String add(@Valid User user,BindingResult binding) {
		if(binding.hasErrors()){
			return "user/add";
		}
		System.out.println("--------2----------");
		users.put(user.getUsername(), user);
		return InternalResourceViewResolver.REDIRECT_URL_PREFIX + "/user/users";
	}
	@RequestMapping(value="")
	public String show(){
		return null;
		
	}
}