在mybatis-plus中内置了该工具类：
/*
* Copyright (c) 2011-2022, baomidou (jobob@qq.com).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.baomidou.mybatisplus.core.toolkit.sql;
import java.util.Objects;
import java.util.regex.Pattern;
/**
* SQL 注入验证工具类
*
* @author hubin
* @since 2021-08-15
*/
public class SqlInjectionUtils {
/**
* SQL语法检查正则：符合两个关键字（有先后顺序）才算匹配
*/
private static final Pattern SQL_SYNTAX_PATTERN = Pattern.compile("(insert|delete|update|select|create|drop|truncate|grant|alter|deny|revoke|call|execute|exec|declare|show|rename|set)"
". (into|from|set|where|table|database|view|index|on|cursor|procedure|trigger|for|password|union|and|or)", Pattern.CASE_INSENSITIVE);
/**
* 使用'、;或注释截断SQL检查正则
*/
private static final Pattern SQL_COMMENT_PATTERN = Pattern.compile("'.*(or|union|--|#|/*|;)", Pattern.CASE_INSENSITIVE);
/**
* 检查参数是否存在 SQL 注入
*
* @param value 检查参数
* @return true 非法 false 合法
*/
public static boolean check(String value) {
Objects.requireNonNull(value);
// 处理是否包含SQL注释字符 || 检查是否包含SQL注入敏感字符
return SQL_COMMENT_PATTERN.matcher(value).find() || SQL_SYNTAX_PATTERN.matcher(value).find();
}
}
