一、
Starting with Spring 3.0, Spring supports the Java Validation API in Spring MVC . No extra configuration is required to make Java Validation work in Spring MVC . You just need to make sure an implementation of the Java API , such as Hibernate Validator, is in the project’s classpath.
1.
2.在实体类写约束
1 public class Spitter { 2 3 private Long id; 4 5 @NotNull 6 @Size(min=5, max=16) 7 private String username; 8 9 @NotNull 10 @Size(min=5, max=25) 11 private String password; 12 13 @NotNull 14 @Size(min=2, max=30) 15 private String firstName; 16 17 @NotNull 18 @Size(min=2, max=30) 19 private String lastName; 20 21 @NotNull 22 @Email 23 private String email;
3.controller中
1 @RequestMapping(value="/register", method=POST) 2 public String processRegistration( 3 @Valid Spitter spitter, 4 Errors errors) { 5 if (errors.hasErrors()) { 6 return "registerForm"; 7 }
SPRING IN ACTION 第4版笔记-第五章BUILDING SPRING WEB APPLICATIONS-007-表单验证@Valid、Error
原文：http://www.cnblogs.com/shamgod/p/5242905.html