java 自定义xss校验注解实现-编程知识

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*?)[^>]*>.*?|<.*? />";@Overridepublic 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