User Register

#Tip of the Day:

Metronic templates

Frontend templates website, but it is not free.

Project Architecture

• View Object: Display to users

• Controller: Receive Http request from frontend, and return formatted result to frontend.

• DOMapper: manipulate databases.

• DO: data objects. Java objects mapping with databases. The attributes are exactly the same as databases.

• BusinessException: Remember, business logic exceptions are http “200”, they are not network problems.

• CommonReturnType: We should define a format for the returned response to communicate with the frontend.

• Service: This is the place you really “do something”. Usually, it depends on DOMappers because many works need databases.

• Model: A complete data package returned by services.

StringUtils

Many libraries have a better implementation for a String operation. For example, they may check null before comparing two Strings.

Always check null to make your code robust

String check

For an web application, null and empty String are the same, which means the user did not input any information.

Register process should be in a transaction “@Transactional”

Validation must be done on both frontend and backend

Cross Origin

Must specify the scope of Cross Origin on both backend and frontend.

@CrossOrigin(allowCredentials = "true",allowedHeaders = "*")

xhrFields:{withCredentials:true}

MD5 encoding

Java’s embedded MD5 implementation only support 16-bit.