java 自定义xss校验注解实现

自定义一个注解@Xss。名字随意

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;

/**
 * 自定义xss校验注解
 * 
 * @author chfatech
 */
@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 {};
}

validator校验类：XssValidator。这个校验类要和上面的@Xss注解上的

@Constraint(validatedBy = { XssValidator.class })对应

import com.chfatech.common.utils.StringUtils;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 自定义xss校验注解实现
 * 
 * @author chfatech
 */
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)
    {
        Pattern pattern = Pattern.compile(HTML_PATTERN);
        Matcher matcher = pattern.matcher(value);
        return matcher.matches();
    }
}

具体使用在某个字段上加上注解；形如：

@Data
public class HomeQuery {

    @ApiModelProperty(name = "keyword",value = "搜索关键词")
    @Xss
    @SqlInject(message = "{exists.illge.word}")
    private String keyword;

    @ApiModelProperty(name = "sdgId",value = "sdg主键id")
    private Long sdgId;
}

然后在控制层中增加@Validated注解校验就可以了