1.添加依赖jar

                 
      
       org.hibernate
                  
      
       hibernate-validator
                  
      
       4.3.1.Final
              
             
                 
      
       javax.validation
                  
      
       validation-api
                  
      
       1.1.0.Final
              
     

2.添加spring 支持

3.java bean中添加注解

public class Company {    @Length(max = 32)    @NotNull    private String id;    @Length(max = 40,message = "微信openId长度不能大于40")    private String openid;    @NotNull    @Length(max = 30)    private String name;}

4.spring controller中添加Valid注解

public JSONView submit(@Valid Company company,BindingResult bindingResult){//codes}

BindingResult注解必须在@Valid 参数后面

5.最后

然后在访问submit这个方法的时候就会自动根据bean定义的规则验证。验证结果放在bindingResult中