Java注解表单验证

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使用javax.validation注解, 实现表单验证

使用

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@RequestMapping("/")
public String index(LoginForm form){
    if (!form.verification()) {
        return null;
    }
    // TODO ...
    return "index";
}

LoginForm.java

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import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern;

public class LoginForm extends BaseForm {

    @NotNull
    @Pattern(regexp = "[A-Za-z0-9]{1,32}")
    private String username;

    @NotNull
    @Pattern(regexp = "[A-Za-z0-9]{32}")
    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;
    }
}

BaseForm.java

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import org.hibernate.validator.HibernateValidator;
import javax.validation.Validation;
import javax.validation.Validator;

public abstract class BaseForm {

    private final static Validator validator = Validation
            .byProvider(HibernateValidator.class).configure()
            .failFast(true).buildValidatorFactory().getValidator();

    public boolean verification() {
        return validator.validate(this).size() == 0;
    }
}

主要的几个注解

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@DecimalMax
@DecimalMin
@Digits
@Future
@Max
@Min
@NotNull
@Past
@Pattern
@Size