SpringMVC与SiteMesh2.4无缝整合并借助JSR303规范实现表单验证

这是个WebProject，SpringMVC用的是3.1.1，SiteMesh用的是2.4

首先是web.xml

  
		user
		org.springframework.web.servlet.DispatcherServlet
		1
	
	
		user
		/
	

	
		sitemesh
		com.opensymphony.sitemesh.webapp.SiteMeshFilter
	
	
		sitemesh
		/*
	

	
		SpringCharacterEncodingFilter
		org.springframework.web.filter.CharacterEncodingFilter
		
			encoding
			UTF-8
		
	
	
		SpringCharacterEncodingFilter
		/*
	

然后是SpringMVC的配置文件user-servlet.xml

然后是SiteMesh的配置文件decorators.xml

	
		/*
	

接下来是SiteMesh用到的页面//WEB-INF//sitemesh//basic.jsp

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="decorator" uri="http://www.opensymphony.com/sitemesh/decorator"%>
User Manager

下面是含有表单的添加用户信息页面//WEB-INF//jsp//user//add.jsp

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

	username:

	nickname:

	password:

	email:

	

下面是表单验证通过后打印用户信息的页面//WEB-INF//jsp//user//list.jsp

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

	${user.value.username}----${user.value.nickname}----${user.value.password}----${user.value.email}
	


继续添加新用户

接下来是使用注解处理表单验证细节的实体类User.java

package com.jadyer.model;

import javax.validation.constraints.Size;

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

/**
 * User
 * @see ===================================================================================================
 * @see JSR303是JavaEE6中的一项子规范,叫做BeanValidation,它的官方参考实现是hibernate-validator
 * @see BeanValidation现在一共有两个规范:BeanValidation1.0(即JSR303)和BeanValidation1.1(即JSR349)
 * @see BeanValidation的官网是http://beanvalidation.org/
 * @see 关于JSR303的详细说明,请参考http://jcp.org/en/jsr/detail?id=303
 * @see 关于JSR349的详细说明,请参考http://jcp.org/en/jsr/detail?id=349
 * @see ===================================================================================================
 * @see JSR303规范主要用于对JavaBean中的字段的值的验证,使得验证逻辑从业务代码中脱离出来
 * @see JSR303定义了基于注解方式的JavaBean验证元数据模型和API,也可通过XML进行元数据定义,但注解会覆盖XML的定义
 * @see JSR303主要是对JavaBean进行验证,而没有指定方法级别(参数or返回值)、依赖注入等验证,因此催生了JSR349规范
 * @see JSR349规范目前处于草案状态,它主要支持依赖注入的验证和方法级别的验证(方法的参数和返回值)
 * @see Spring3.1目前已经完全支持依赖注入验证和方法级别的验证了,只不过不是原生的(JSR349规范还是草案嘛)
 * @see 关于这个的详细说明,可以参考此爷的文章http://www.iteye.com/topic/1123007
 * @see ===================================================================================================
 * @see 另外,Struts2已经可以很完美的和JSR303整合到一起了,呵呵,很是叫我欣慰啊!!!!
 * @see ===================================================================================================
 * @see 我们这里使用的是JSR303的hibernate-validator实现,它主要需要以下三个jar包
 * @see jboss-logging-3.1.0.CR2.jar
 * @see validation-api-1.0.0.GA.jar
 * @see hibernate-validator-4.3.0.Final.jar
 * @see ===================================================================================================
 * @author http://blog.csdn.net/jadyer
 * @create May 12, 2012 3:00:46 AM
 */
public class User {
	@NotEmpty(message="姓名不能为空")
	private String username;
	private String nickname;
	@Size(min=3, max=10, message="密码长度必须大于3小于10")
	private String password;
	@NotEmpty(message="邮箱不能为空")
	@Email(message="邮箱格式不正确") //也可通过@Pattern(regexp="")书写正则来判断，二者都是JSR303规范中的
	private String email;
	
	public User() {}
	public User(String username, String nickname, String password, String email) {
		this.username = username;
		this.nickname = nickname;
		this.password = password;
		this.email = email;
	}
	
	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;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
}

最后是SpringMVC的控制器UserController.java

package com.jadyer.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 com.jadyer.model.User;

/**
 * @see ====================================================================================
 * @see SpringMVC中借助JSR303规范进行表单验证
 * @see 第一步：在实体类中针对需要验证的属性，进行Annotation配置
 * @see 第二步：在Controller的方法参数前使用@Valid开启JSR303验证，并添加BindingResult参数
 * @see        BindingResult承载着JSR303验证时所产生的message，可据此进行判断验证结果
 * @see 第三步：判断BindingResult中是否装载了JSR303验证的message，有则转到前台页面显示出来
 * @see 第四步：前台页面中使用打印JSR303的message信息
 * @see ====================================================================================
 * @see SpringMVC与sitemesh2.4无缝整合
 * @see 第一步:拷贝sitemesh-2.4.jar到工程中
 * @see 第二步:在web.xml中配置com.opensymphony.sitemesh.webapp.SiteMeshFilter
 * @see 第三步:创建并编辑sitemesh配置文件decorators.xml
 * @see 第四步:创建并编辑/WEB-INF/sitemesh/basic.jsp
 * @see ====================================================================================
 * @author http://blog.csdn.net/jadyer
 * @create May 12, 2012 3:20:46 AM
 */
@Controller
@RequestMapping("/user")
public class UserController {
	private final static Map users = new HashMap();

	@RequestMapping(value="/add", method=RequestMethod.GET)
	public String addUser(Model model){
		model.addAttribute(new User());
		return "user/add";
	}
	@RequestMapping(value="/add", method=RequestMethod.POST)
	public String addUser(@Valid User user, BindingResult binding){
		//该方法若有其它参数，应写成这样addUser(@Valid User user, BindingResult binding, String job)
		//就是说，这里一定要把BindingResult放在待验证对象(@Valid User user)参数的后面，否则会报错
		if(binding.hasErrors()){
			return "user/add";
		}
		users.put(user.getUsername(), user);
		return "redirect:/user/list";
	}
	
	@RequestMapping("/list")
	public String list(Model model){
		model.addAttribute("users", users);
		return "user/list";
	}
}

补充： 本示例的访问地址是http://127.0.0.1:8080/SpringMVC_study/user/add

作者：jadyer 发表于2012-5-17 2:38:56 原文链接

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