Preventing SQL injection attacks in Java programs

I have to add a statement to my java program to update the database table: Stringinsert="INSERTINTOcustomer(name,address,email)VALUES('"+name+"','"+addre+"','"+email+"'); ";I've heard this can be exploited via SQL injection, for example: DROPTABLEcustomer

P粉328911308 2023-10-20 20:06:17 0  2  836

After the underlying device C language RC4 is encrypted, why can't Java use rc4 to decrypt, but other people's PHP programs can decrypt successfully?

The underlying device is a wifi probe that regularly pushes data to a service. This service address receives the data and uses rc4 to decrypt it. The underlying device rc4 encryption is written in C language. java receiving program {code...} java rc4 decryption program: public class RC4 { {code...} ...

PHP中文网 2017-06-17 09:15:15 0  1  1270

Is this in Java language?

Is this small program developed in Java language?

矢车菊 2019-05-09 20:44:56 0  2  1717

Install JAVA

After JAVA is installed, if you press WINDOWS and enter JAVA, it will prompt that it is not an internal or external command, nor is it an operable program or batch file.

手机用户603753422 2019-08-05 20:51:36 0  4  1850

ios - weex program running error

Occasional errors will occur when running the weex program. Has anyone encountered the same problem? weex version 0.9.5

淡淡烟草味 2017-05-17 10:05:07 0  1  617

vim - text editor for writing programs

Are text editors like vim, sublime, notepaad++ only useful when writing small programs? Is it more convenient to use an IDE to do large projects? Based on the thoughts in the link below (you may need to circumvent the firewall) Is coding Java in Notepad++ and compiling with comma...

習慣沉默 2017-05-16 16:40:04 0  2  832

Program execution detection

Isn't the program running time the end time minus the start time? Why is the start time minus the end time?

小崔 2017-11-04 10:58:35 0  0  1175

How to pass the value entered by prompt() to php program

How to pass the value input by prompt() to the php program. I want to pass the value returned by the pop-up window to the background php program for further processing. How to feed this text value back to the background php program?

叶祖峰 2020-07-15 18:51:11 0  1  1662

Can mini programs be used to develop functional programs?

WeChat mini program code size is limited, can it still be used to develop functional programs?

Ignite 2018-04-14 09:54:42 0  4  1715

Build a login page using MySQL, Java, HTML and CSS

I have created a table containing the login details and written a program in Java to handle the information, but I don't know how to link the HTML's front-end file to the Java file.

P粉244730625 2023-09-01 13:24:50 0  1  648

python3.x - How to convert python3.4 programs to python2.7

How to convert python3.4 programs to python2.7, not python2.7 to python3

滿天的星座 2017-06-12 09:26:55 0  2  1033

Programming - How to turn a python program into a website

Please tell me how to turn the function of a program originally written in python into a website and use this function on a web page? Thanks!

淡淡烟草味 2017-05-18 10:47:33 0  6  873

The relationship between obtaining file input stream and memory usage in JAVA

A Java program obtains the input stream of a file, such as the input stream of a 50M text file. At this time, has the program loaded the entire file into memory? Has it occupied 50M of space in memory? Or is there just one entrance, and you need to loop through the contents...

三叔 2017-06-15 09:21:27 0  3  1030

WeChat mini program payment failed to activate

The front-end of my mini program failed to directly activate the payment function: Return to me Please open the connection on the WeChat client. Is it not possible to use the mini program developer tools? Open this connection?

四个猪蹄 2018-06-21 15:10:26 0  8  2106

matlab - Can Python start the console while saving program variables?

Similar to matlab, you can directly operate variables on the console after the program is completed, instead of starting an independent console program. I wonder if any Python IDE supports this behavior.

phpcn_u1582 2017-07-05 11:04:10 0  2  1521

php - How to dynamically change IP in the program

How to implement the function of dynamically changing IP in the program. The IP address can be purchased from a certain treasure.

某草草 2017-05-18 10:47:10 0  2  754

c++ - WINAPI exception when calling SetConsoleHandler when closing program

I wrote a program that uses multiple threads to obtain some data, and then stores it in an array. Then when I close the console program, an event will be triggered, and then I will write the data in the array to a file in this event. But when I run this program for less than 10 minutes, writing file...

仅有的幸福 2017-05-16 13:24:41 0  1  678

Are mini program push messages just template messages?

Are mini program push messages just template messages? Also, does this template message have an expiration time? Can all WeChat users receive messages in real time?

xxxxxx 2019-04-16 15:31:24 0  2  1224

Does the WeChat mini program support jumping to external linked web pages?

Does the WeChat mini program support jumping to external linked web pages? For example, click to jump to Baidu. Does the WeChat mini program support jumping to external linked web pages? For example, click to jump to Baidu.

手机用户1606022500 2021-07-21 11:20:26 0  1  1089

Calculate the time complexity and space complexity of a program

Can you explain how to calculate the time complexity and space complexity of a program based on a specific algorithm (such as a sorting algorithm)?

Dream（☆_☆） 2019-10-17 22:02:47 0  2  1126