Ethereum and Java docking

1. There is no inevitable relationship between whether the virtual currency will disappear or not and whether it can not be used on the third-party platform. Online third-party trading platform can only say that this kind of currency has another platform for trading, which shows that this kind of currency is more reliable
Ruitai coin has not been launched on the third-party platform, but it is rumored that it will also be launched on the third-party platform.

2. Okex. I've been using it. Shi Yuzhu has shares

3. They ask you to return the interface content in JSON format. You can't write. Just contact me in private and give me some living expenses.

4. The front end and back end are separated from each other, and cross domain needs to be set

the front-end also needs to set some parameters. For the front-end, I use Axios to set withcredentials

5. See if your httpclient is right.

6. Extract the docking action into a method, pass the interface path and interface parameters to the method as parameters, and the method execution returns JSON uniformly. In this way, you only need to write for different interfaces when processing callback data.

7. I only used one scanning gun. There are two modes. One is to connect the scanning gun with a network cable, and the other is connected to the network card. I don't remember. In this way, as long as the focus is set to the text box on the screen, and then the scanning gun scans the barcode, the barcode information will be displayed in the scanning box, The gun I use can even trigger a button click event after scanning and submit the content directly on the web page. The second mode is to connect the COM port. The scanned data byte stream is sent to the computer through COM. Then I listen to the data stream sent by the specified COM port through an external jar package of Java, and I can get the data. I've never thought of using button events to trigger scanners. I have to see if the scanners of your brand provide this kind of program interface

there is a lot of wordiness on it

according to what you said, you need to see if the gun you use supports the COM port to transfer data, and then find a way for Java to access the COM port. After getting the data from COM, it's easy to show where it is. Ha ha
from: the answer to help

8. If so, you should know that although Java is a high-level language, it is based on virtual machine and can not operate the hardware directly. For the underlying hardware, it is generally implemented through C / C +. However, Java can be realized through Java Native Interface --- JNI, and it can be completed by calling C / C + + through Java interface. The premise is that you have to know C / C++