How to develop a simple online investment platform using MySQL and Go language

How to use MySQL and Go language to develop a simple online investment platform

Introduction:
As a digital financial service, the development of online investment platforms is increasingly attracted people's attention. This article will introduce how to use MySQL and Go language to develop a simple online investment platform, including database design and related code examples.

1. Database design:
   First of all, we need to design the structure of the database to store data such as user information, investment product information, and transaction records. The following is an example database table design:

• User table (User):
  Fields: User ID (ID), Username (Username), Password (Password), Email (Email), Account Balance (Balance), Registration Time (CreatedAt)
  Primary Key: User ID (ID)
• Investment Product Table (Investment):
  Field: Product ID (ID), Product name (Name), investment amount (Amount), expected interest rate (ExpectedReturn), investment term (InvestmentTerm)
  Primary key: Product ID (ID)
• Transaction record table (Transaction):
  field : Transaction ID (ID), User ID (UserID), Product ID (InvestmentID), Transaction time (Time), Transaction amount (Amount)
  Primary key: Transaction ID (ID)
  Foreign key: User ID (UserID) ), product ID (InvestmentID)

2. Database connection configuration:
   In Go language, we can use third-party libraries such as "database/sql" and "github.com/go -sql-driver/mysql" to connect to the MySQL database. The following is a sample code for a simple database connection configuration:

import (

"database/sql"
"fmt"
"log"

_ "github.com/go-sql-driver/mysql"

)

func connectDB() (*sql.DB, error) {

db, err := sql.Open("mysql", "username:password@tcp(localhost:3306)/database_name")
if err != nil {
    log.Fatal(err)
    return nil, err
}

err = db.Ping()
if err != nil {
    log.Fatal(err)
    return nil, err
}

fmt.Println("Connected to the database!")
return db, nil

}

3. User registration function:
   User registration is one of the basic functions of the online investment platform. The following is the code for an example user registration function:

import (

"database/sql"
"fmt"
"log"
"net/http"

)

func registerUser(w http.ResponseWriter, r *http.Request) {

username := r.FormValue("username")
password := r.FormValue("password")
email := r.FormValue("email")

db, err := connectDB()
if err != nil {
    log.Fatal(err)
    http.Error(w, "Internal Server Error", http.StatusInternalServerError)
    return
}
defer db.Close()

stmt, err := db.Prepare("INSERT INTO User (Username, Password, Email) VALUES (?, ?, ?)")
if err != nil {
    log.Fatal(err)
    http.Error(w, "Internal Server Error", http.StatusInternalServerError)
    return
}
defer stmt.Close()

_, err = stmt.Exec(username, password, email)
if err != nil {
    log.Fatal(err)
    http.Error(w, "Internal Server Error", http.StatusInternalServerError)
    return
}

fmt.Fprintln(w, "Registration successful!")

}

4. Investment product display function:
   Displaying investment products is another basic function of the online investment platform. The following is the code for an example investment product display function:

import (

"database/sql"
"fmt"
"log"
"net/http"

)

type Investment struct {

ID              int
Name            string
Amount          float64
ExpectedReturn  float64
InvestmentTerm  int

}

func getInvestmentList(w http.ResponseWriter, r *http.Request) {

db, err := connectDB()
if err != nil {
    log.Fatal(err)
    http.Error(w, "Internal Server Error", http.StatusInternalServerError)
    return
}
defer db.Close()

rows, err := db.Query("SELECT * FROM Investment")
if err != nil {
    log.Fatal(err)
    http.Error(w, "Internal Server Error", http.StatusInternalServerError)
    return
}
defer rows.Close()

var investments []Investment
for rows.Next() {
    var investment Investment
    err := rows.Scan(&investment.ID, &investment.Name, &investment.Amount, &investment.ExpectedReturn, &investment.InvestmentTerm)
    if err != nil {
        log.Fatal(err)
        http.Error(w, "Internal Server Error", http.StatusInternalServerError)
        return
    }

    investments = append(investments, investment)
}

for _, investment := range investments {
    fmt.Fprintf(w, "ID: %d, Name: %s, Amount: %.2f, Expected Return: %.2f%%, Investment Term: %d months

", investment.ID, investment.Name, investment.Amount, investment.ExpectedReturn, investment.InvestmentTerm)

}

}

5. Summary:
   This article introduces how to use MySQL and Go language to develop a simple online investment platform. Through database design and corresponding code examples, we can realize user Basic functions such as registration, investment product display, etc. Of course, this is just a simple example, and the actual online investment platform requires more complex functions and more comprehensive security measures. However, through this example, readers can understand the use of MySQL and Go language Have a basic understanding and inspiration of the process of developing an online investment platform.

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