SQL 注入过滤详解数据库

    //效验 
    protected static boolean sqlValidate(String str) { 
        str = str.toLowerCase();//统一转为小写 
        String badStr = "'|and|exec|execute|insert|select|delete|update|count|drop|*|%|chr|mid|master|truncate|" + 
                "char|declare|sitename|net user|xp_cmdshell|;|or|-|+|,|like'|and|exec|execute|insert|create|drop|" + 
                "table|from|grant|use|group_concat|column_name|" + 
                "information_schema.columns|table_schema|union|where|select|delete|update|order|by|count|*|" + 
                "chr|mid|master|truncate|char|declare|or|;|-|--|+|,|like|//|/|%|#";//过滤掉的sql关键字，可以手动添加 
        String[] badStrs = badStr.split("//|"); 
        for (int i = 0; i < badStrs.length; i++) { 
            if (str.indexOf(badStrs[i]) >= 0) { 
                return true; 
            } 
        } 
        return false; 
    }