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- package com.ruoyi.common.utils.sql;
- import com.ruoyi.common.exception.UtilException;
- import com.ruoyi.common.utils.StringUtils;
- import lombok.AccessLevel;
- import lombok.NoArgsConstructor;
- /**
- * 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");
- }
- }
- }
- }
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