Xss简单校验

import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;


@Retention(RetentionPolicy.RUNTIME)
@Target(value = { ElementType.METHOD, ElementType.FIELD, ElementType.CONSTRUCTOR, ElementType.PARAMETER })
@Constraint(validatedBy = { XssValidator.class })
public @interface Xss
{
    String message() default "不允许任何脚本运行";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class XssValidator implements ConstraintValidator<Xss, String>
{
    private static final String HTML_PATTERN = "<(\\S*?)[^>]*>.*?|<.*? />";

    @Override
    public boolean isValid(String value, ConstraintValidatorContext constraintValidatorContext)
    {
        if (StringUtils.isBlank(value))
        {
            return true;
        }
        return !containsHtml(value);
    }

    public static boolean containsHtml(String value)
    {
        StringBuilder sHtml = new StringBuilder();
        Pattern pattern = Pattern.compile(HTML_PATTERN);
        Matcher matcher = pattern.matcher(value);
        while (matcher.find())
        {
            sHtml.append(matcher.group());
        }
        return pattern.matcher(sHtml).matches();
    }
}