How to convert Chinese in golang

Golang is an efficient programming language that can be used for development in various fields, including Chinese conversion. Chinese conversion is essential in many application scenarios, such as search engines, machine learning, etc. This article will introduce the Chinese conversion method in Golang.

1. String conversion

In Golang, the string itself is encoded in UTF-8, so encoding and decoding are required when processing Chinese characters. It can be implemented using the functions in the strings package provided by Golang.

1.1 Get the ASCII code from the Chinese string

Use the ToASCII function of the string package to get the ASCII code from the Chinese string:

Code example:

import (
    "fmt"
    "strconv"
    "strings"
)
func main() {
    str := "Hello，世界！"
    asciiStr := strings.ToASCII(str)
    fmt.Println(asciiStr)
}

Output result:

Hello@u4e16u754c!

1.2 Restore Chinese string from ASCII code

Use the Unquote function of strconv package to restore Chinese string from ASCII code:

Code example:

import (
    "fmt"
    "strconv"
)
func main() {
    asciiStr := `"Hello@u4e16u754c!"`
    str, _ := strconv.Unquote(asciiStr)
    fmt.Println(str)
}

Output results:

Hello，世界！

2. File conversion

When processing Chinese files, different encoding methods need to be used, such as GB2312, GBK, UTF-8, etc. . Golang also provides corresponding packages and functions for processing.

2.1 Read the file in GB2312 encoding format

Use the bufio package and the NewDecoder function of the GB2312 package to read the text file in the GB2312 encoding format:

Code example:

import (
    "bufio"
    "fmt"
    "io"
    "os"
    "golang.org/x/text/encoding/simplifiedchinese"
)
func main() {
    file, err := os.Open("test.txt")
    if err != nil {
        fmt.Println(err)
    }
    defer file.Close()
    reader := bufio.NewReader(file)
    decoder := simplifiedchinese.GB2312.NewDecoder()
    for {
        line, err := reader.ReadString('
')
        if err != nil || io.EOF == err {
            break
        }
        str, err := decoder.String(line)
        if err != nil {
            fmt.Println(err)
        }
        fmt.Println(str)
    }
}

2.2 Read files in UTF-8 encoding format

Use the bufio package and the NewDecoder function of the UTF-8 package to read text files in UTF-8 encoding format:

Code example ：

import (
    "bufio"
    "fmt"
    "io"
    "os"
    "golang.org/x/text/encoding/unicode"
)
func main() {
    file, err := os.Open("test.txt")
    if err != nil {
        fmt.Println(err)
    }
    defer file.Close()
    reader := bufio.NewReader(file)
    decoder := unicode.UTF8.NewDecoder()
    for {
        line, err := reader.ReadString('
')
        if err != nil || io.EOF == err {
            break
        }
        str, err := decoder.String(line)
        if err != nil {
            fmt.Println(err)
        }
        fmt.Println(str)
    }
}

3. Database conversion

When dealing with Chinese databases, factors such as character sets and encoding methods need to be considered. Golang provides the database/sql package and corresponding driver, which can connect to various databases and convert Chinese characters. The following uses the MySQL database as an example.

3.1 Connect to MySQL database

First you need to install the MySQL driver:

go get github.com/go-sql-driver/mysql

Then connect to the database and set the character set and encoding method:

Code example:

import (
    "database/sql"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
)
func main() {
    db, err := sql.Open("mysql", "user:password@tcp(127.0.0.1:3306)/dbname?charset=utf8mb4")
    if err != nil {
        fmt.Println(err)
    }
    defer db.Close()
}

3.2 Query MySQL database

Use the query function in the sql package to query data, and set the character set and encoding:

Code example:

import (
    "database/sql"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
)
func main() {
    db, err := sql.Open("mysql", "user:password@tcp(127.0.0.1:3306)/dbname?charset=utf8mb4")
    if err != nil {
        fmt.Println(err)
    }
    defer db.Close()
    rows, err := db.Query("SELECT * FROM table_name")
    if err != nil {
        fmt.Println(err)
    }
    defer rows.Close()
    for rows.Next() {
        var name string
        var age int
        err = rows.Scan(&name, &age)
        if err != nil {
            fmt.Println(err)
        }
        fmt.Println(name, age)
    }
}

Through the above code examples, it can be seen that the processing method of Chinese characters in Golang is mainly to use the corresponding packages and functions, which is relatively simple and easy to use. When it is necessary to deal with Chinese character problems, you can use Golang to perform corresponding operations to improve the performance and efficiency of the application.

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