先看看几个关键词 @Valid @Pattern @NotNull @NotBlank @Size BindingResult 这些就是Spring MVC的数据校验的几个注解。 那怎么用呢?往下看
1.先在pom.xml文件中加入依赖
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.0.Final</version>
</dependency>
2.写controller层
@Controller
@RequestMapping("/user")
public class UserController extends BaseController{
@RequestMapping("/index")
public String index() {
return "index";
} @RequestMapping("/toAddUser")
public String toAddUserPage() {
return "addUser";
} /**
* form表单添加用户，并用注解形式校验
* @Valid 表示 userModel要进行校验
* BindingResult 表示绑定校验的错误信息返回
* @param userModel
* @param bindingResult
* @return
*/
@RequestMapping("/add")
public String addUser(@Valid @ModelAttribute("userModel") UserModel userModel, BindingResult bindingResult, Model model) { if (bindingResult.hasErrors()) {
FieldError fieldError = bindingResult.getFieldError();
String validMess = fieldError.getDefaultMessage();
model.addAttribute("errors", validMess);
return "error";
}
System.out.println("用户姓名:" + userModel.getName());
System.out.println("用户邮箱:" + userModel.getEmail());
//用重定向防止页面刷新重复提交
return "redirect: /user/index";
}
}
3、看看UserModel.java
public class UserModel {
private Integer id;
// @NotNull(message = "姓名不能为空")
@NotBlank(message = "{username.not.empty}")
// @Size(min = 3, max = 10, message = "please input right length")
private String name;
private Integer age;
private String gender;
@Pattern(regexp = "^[A-Za-z\\d]+([-_.][A-Za-z\\d]+)*@([A-Za-z\\d]+[-.])+[A-Za-z\\d]{2,4}$",
message = "{username.not.empty}")
private String email;
@NotNull
private String phone;
setters... getters....
}
4、在spring 的配置文件中添加配置信息 applicationContext.xml
<!--JSR-303 @Valid 国际化支持配置 -->
<mvc:annotation-driven validator="validator" conversion-service="conversion-service" />
<bean id="validator"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
<!-- 如果不加默认到 使用classpath下的 ValidationMessages.properties -->
<property name="validationMessageSource" ref="messageSource"/>
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="classpath:valid-message-zh" />
<property name="fileEncodings" value="utf-8"/>
<property name="cacheSeconds" value="120"/>
</bean>
<bean id="conversion-service" class="org.springframework.format.support.FormattingConversionServiceFactoryBean" />
5、别忘记配置文件中的 valid-message-zh.properties哦
username.not.empty=\u7528\u6237\u540d\u4e0d\u80fd\u4e3a\u7a7a
参考：
[1] 《Spring实战》，人民邮电出版社， Craig Walls