Spring MVC 验证主要还是用的是hibernate的验证。so需要添加以下的jar包：
1、 hibernate-validator-5.2.2.Final.jar
2、hibernate-validator-annotation-processor-5.2.2.Final.jar (这个可以不用)
3、 log4j.jar
4 、slf4j-api-1.5.6.jar
5、 slf4j-log4j12-1.5.6.jar
6 、validation-api-1.1.0.Final.jar
以登录验证为例：
在实体属性上配置注解；
package com.cy.springannotation.entity; import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern; import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotEmpty; /**
* 定义一个表单实体类
* @author acer
*
*/
public class UserBean {
//要求属性名必须要和表单的参数名一样的! @NotEmpty(message="用户名不能为空！")
@Pattern(regexp="\\w{6,20}",message="用户名6-20位")
private String username; @NotEmpty(message="密码不能为空")
@Length(max=20,min=6,message="密码不能小于6位")
private String password; public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
} }
JSP页面上通过spring标记来获取错误信息：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8" contentType="text/html; charset=utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!-- srpingmvc 验证需要使用到spring表单标签 -->
<%@ taglib prefix="springform" uri="http://www.springframework.org/tags/form" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>验证页面</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> </head> <body> <!-- commandName用于指定活动的Bean对象，即我可以在页面上，获取对象属性所对应的错误信息，值是对象名称的首字母小写，同modelAttribute一样的意思（modelAttribute="contentModel"） -->
<!-- <springform:form method="post" action="login.do" commandName="userBean"> -->
<springform:form method="post" action="login.do" modelAttribute="user"> <table>
<tr>
<td>用户名：</td>
<td><input type="text" name="username"/><springform:errors delimiter="," path="username"></springform:errors></td>
</tr>
<tr>
<td>密码</td>
<td><input type="text" name="password"/><springform:errors delimiter="," path="password"></springform:errors></td>
</tr>
<tr>
<td colspan="2"> <input type="submit" value="提交"/> </td>
</tr>
</table>
</springform:form>
</body>
</html>
delimiter：如果一个属性有多个错误，错误信息的分隔符。默认是换行.
path:验证失败的属性名.
控制器：
@RequestMapping(value="/login.do")
//@Valid 通过该注解告知该方法，我的哪个实体Bean需要验证
//BindingResult 为固定参数，用于接收验证结果 public String login(@ModelAttribute("user") @Valid UserBean user,BindingResult br) {
if(br.hasErrors()){
//验证未通过则
return "validate1";
}
log.info(user.getUsername());
log.info(user.getPassword()); return "index";
}
如果界面上使用了spring标签，那么需要预先启动Spring容器，所以在web.xml中增加配置：
<!-- 启动spring容器，用于支持springmvc validate -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/springAnnotation-servlet.xml</param-value>
</context-param> <!-- 配置在context-param里面文件内的内容，需要通过 ContextLoaderListener添加到上下文里面去-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
到springAnnotation-servlet.xml文件中配置：
<!-- 开启注解这里需要添加个validator-->
<!--开启注解 -->
<mvc:annotation-driven conversion-service="tc" validator="validator" /> <!-- 验证配置，告知srpingmvc，我使用的是Hibernate验证框架来完成的验证 -->
<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<property name="providerClass" value="org.hibernate.validator.HibernateValidator" />
</bean>
显示测试：
进入登录页面
直接点击提交：
下面是主要的验证注解及说明：
|
注解 |
适用的数据类型 |
说明 |
|
@AssertFalse |
Boolean, boolean |
验证注解的元素值是false |
|
@AssertTrue |
Boolean, boolean |
验证注解的元素值是true |
|
@DecimalMax（value=x） |
BigDecimal, BigInteger, String, byte,short, int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number andCharSequence. |
验证注解的元素值小于等于@ DecimalMax指定的value值 |
|
@DecimalMin（value=x） |
BigDecimal, BigInteger, String, byte,short, int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number andCharSequence. |
验证注解的元素值小于等于@ DecimalMin指定的value值 |
|
@Digits(integer=整数位数, fraction=小数位数) |
BigDecimal, BigInteger, String, byte,short, int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number andCharSequence. |
验证注解的元素值的整数位数和小数位数上限 |
|
@Future |
java.util.Date, java.util.Calendar; Additionally supported by HV, if theJoda Time date/time API is on the class path: any implementations ofReadablePartial andReadableInstant. |
验证注解的元素值（日期类型）比当前时间晚 |
|
@Max（value=x） |
BigDecimal, BigInteger, byte, short,int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type ofCharSequence (the numeric value represented by the character sequence is evaluated), any sub-type of Number. |
验证注解的元素值小于等于@Max指定的value值 |
|
@Min（value=x） |
BigDecimal, BigInteger, byte, short,int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of CharSequence (the numeric value represented by the char sequence is evaluated), any sub-type of Number. |
验证注解的元素值大于等于@Min指定的value值 |
|
@NotNull |
Any type |
验证注解的元素值不是null |
|
@Null |
Any type |
验证注解的元素值是null |
|
@Past |
java.util.Date, java.util.Calendar; Additionally supported by HV, if theJoda Time date/time API is on the class path: any implementations ofReadablePartial andReadableInstant. |
验证注解的元素值（日期类型）比当前时间早 |
|
@Pattern(regex=正则表达式, flag=) |
String. Additionally supported by HV: any sub-type of CharSequence. |
验证注解的元素值与指定的正则表达式匹配 |
|
@Size(min=最小值, max=最大值) |
String, Collection, Map and arrays. Additionally supported by HV: any sub-type of CharSequence. |
验证注解的元素值的在min和max（包含）指定区间之内，如字符长度、集合大小 |
|
@Valid |
Any non-primitive type（引用类型） |
验证关联的对象，如账户对象里有一个订单对象，指定验证订单对象 |
|
@NotEmpty |
|
验证注解的元素值不为null且不为空（字符串长度不为0、集合大小不为0） |
|
@Range(min=最小值, max=最大值) |
|
验证注解的元素值在最小值和最大值之间 |
|
@NotBlank |
|
验证注解的元素值不为空（不为null、去除首位空格后长度为0），不同于@NotEmpty，@NotBlank只应用于字符串且在比较时会去除字符串的空格 |
|
@Length(min=下限, max=上限) |
|
验证注解的元素值长度在min和max区间内 |
|
|
|
验证注解的元素值是Email，也可以通过正则表达式和flag指定自定义的email格式 |