SpringMVC bean validator 使用

1.添加依赖jar

 <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>4.3.1.Final</version>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.1.0.Final</version>
        </dependency>

2.添加spring 支持

<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/>

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