package com.walker.jdbc.util;
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import com.walker.infrastructure.ApplicationRuntimeException;
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/**
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* sql操作工具类
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*
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* @author ruoyi
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*/
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public class SqlUtils {
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/**
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* 定义常用的 sql关键字
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*/
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public static final String SQL_REGEX = "select |insert |delete |update |drop |count |exec |chr |mid |master |truncate |char |and |declare ";
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/**
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* 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)
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*/
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public static final String SQL_PATTERN = "[a-zA-Z0-9_\\ \\,\\.]+";
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/**
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* 把原始sql变成oracle分页语句。
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* @param sql
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* @return
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* @date 2023-03-03
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*/
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public static final String getOraclePageSql(String sql){
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return new StringBuilder(PAGE_PREFIX_ORACLE).append(sql).append(PAGE_SUFFIX_ORACLE).toString();
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}
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public static final String PAGE_PREFIX_ORACLE = "select * from (select row_.*, rownum rownum_ from (";
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public static final String PAGE_SUFFIX_ORACLE = ") row_ where rownum <= ?) where rownum_ >= ?";
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/**
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* 检查字符,防止注入绕过
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*/
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public static String escapeOrderBySql(String value) {
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if (StringUtils.isNotEmpty(value) && !isValidOrderBySql(value)) {
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throw new ApplicationRuntimeException("参数不符合规范,不能进行查询");
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}
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return value;
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}
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/**
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* 验证 order by 语法是否符合规范
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*/
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public static boolean isValidOrderBySql(String value)
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{
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return value.matches(SQL_PATTERN);
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}
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/**
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* SQL关键字检查
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*/
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public static void filterKeyword(String value) {
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if (StringUtils.isEmpty(value)) {
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return;
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}
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String[] sqlKeywords = StringUtils.split(SQL_REGEX, "\\|");
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for (String sqlKeyword : sqlKeywords) {
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if (org.apache.commons.lang3.StringUtils.indexOfIgnoreCase(value, sqlKeyword) > -1) {
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throw new ApplicationRuntimeException("参数存在SQL注入风险");
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}
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}
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}
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}
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