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- package com.jsh.erp.utils;
- import com.jsh.erp.exception.UtilException;
- /**
- * sql操作工具类
- *
- * @author ji-sheng-hua
- */
- public class SqlUtil
- {
- /**
- * 定义常用的 sql关键字
- */
- public static String SQL_REGEX = "and |extractvalue|updatexml|exec |insert |select |delete |update |drop |count |chr |mid |master |truncate |char |declare |or |+|user()";
- /**
- * 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 String SQL_PATTERN = "[a-zA-Z0-9_\\ \\,\\.]+";
- /**
- * 限制orderBy最大长度
- */
- private static final int ORDER_BY_MAX_LENGTH = 500;
- /**
- * 检查字符,防止注入绕过
- */
- public static String escapeOrderBySql(String value)
- {
- if (StringUtil.isNotEmpty(value) && !isValidOrderBySql(value))
- {
- throw new UtilException("参数不符合规范,不能进行查询");
- }
- if (StringUtil.length(value) > ORDER_BY_MAX_LENGTH)
- {
- throw new UtilException("参数已超过最大限制,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);
- }
- }
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