小编Har*_*rry的帖子

我在Spring MVC(@Validate)中使用了带有后备对象和注释的验证器.它运作良好.

现在我试图通过实现我自己的验证来准确理解它如何与Spring手册一起工作.我不确定如何"使用"我的验证器.

我的验证员:

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.myartifact.geometry.Shape;

public class ShapeValidator implements Validator {

@SuppressWarnings("rawtypes")
public boolean supports(Class clazz) {
    return Shape.class.equals(clazz);
}

public void validate(Object target, Errors errors) {
    ValidationUtils.rejectIfEmpty(errors, "x", "x.empty");
    ValidationUtils.rejectIfEmpty(errors, "y", "y.empty");
    Shape shape = (Shape) target;
    if (shape.getX() < 0) {
        errors.rejectValue("x", "negativevalue");
    } else if (shape.getY() < 0) {
        errors.rejectValue("y", "negativevalue");
    }
}
}

我想要验证的Shape类:

public class Shape {

protected int x, y;

public Shape(int x, int y) {
    this.x …