All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.zznote.basecommon.common.util.SqlUtil Maven / Gradle / Ivy

The newest version!
package com.zznote.basecommon.common.util;

import com.zznote.basecommon.common.exception.UtilException;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.apache.commons.lang3.StringUtils;

/**
 * sql操作工具类
 *
 * @author ruoyi
 */
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class SqlUtil {

    /**
     * 定义常用的 sql关键字
     */
    public static final String SQL_REGEX = "select |insert |delete |update |drop |count |exec |chr |mid |master |truncate |char |and |declare ";

    /**
     * 仅支持字母、数字、下划线、空格、逗号、小数点(支持多个字段排序)
     */
    public static final String SQL_PATTERN = "[a-zA-Z0-9_\\ \\,\\.]+";

    /**
     * 检查字符,防止注入绕过
     */
    public static String escapeOrderBySql(String value) {
        if (StringUtils.isNotEmpty(value) && !isValidOrderBySql(value)) {
            throw new UtilException("参数不符合规范,不能进行查询");
        }
        return value;
    }

    /**
     * 验证 order by 语法是否符合规范
     */
    public static boolean isValidOrderBySql(String value) {
        return value.matches(SQL_PATTERN);
    }

    /**
     * SQL关键字检查
     */
    public static void filterKeyword(String value) {
        if (StringUtils.isEmpty(value)) {
            return;
        }
        String[] sqlKeywords = StringUtils.split(SQL_REGEX, "\\|");
        for (String sqlKeyword : sqlKeywords) {
            if (StringUtils.indexOfIgnoreCase(value, sqlKeyword) > -1) {
                throw new UtilException("参数存在SQL注入风险");
            }
        }
    }
}




© 2015 - 2024 Weber Informatics LLC | Privacy Policy