How to verify whether the input is all Chinese characters in golang

With the development of the times, we pay more and more attention to the verification of data, especially the verification of user input. For language verification, how to accurately determine whether the input is all Chinese characters has become an important issue. In golang, we can use the unicode package and regexp package to achieve this requirement.

1. Unicode package

The unicode package provides a series of core support for unicode. We can use the functions in this package to accurately determine whether a character is a Chinese character.

Among them, the unicode.Is() function can determine whether a character belongs to the specified character set. When the specified character set is the Chinese character set, it can be determined whether the character is a Chinese character.

So how to determine whether a string consists entirely of Chinese characters? We can judge each character in the string. Only when every character is a Chinese character, can we judge that the string is composed entirely of Chinese characters.

The sample code is as follows:

package main

import (
    "fmt"
    "unicode"
)

func isAllChinese(str string) bool {
    for _, c := range str {
        if !unicode.Is(unicode.Scripts["Han"], c) {
            return false
        }
    }
    return true
}

func main() {
    testStr := "我是中文字符"
    if isAllChinese(testStr) {
        fmt.Println(testStr, "is all Chinese characters")
    } else {
        fmt.Println(testStr, "is not all Chinese characters")
    }
}

By calling the isAllChinese() function, we can determine whether the specified string is composed entirely of Chinese characters.

2. regexp package

Regular expression is a tool used to match strings. Golang provides the regexp package to implement regular expression matching.

We can use the regular expressions in this package to determine whether a string consists entirely of Chinese characters. The unicode value range of Chinese characters is u4e00 to u9fa5, so you can use unicode regular expressions to match Chinese characters.

The sample code is as follows:

package main

import (
    "fmt"
    "regexp"
)

func isAllChinese(str string) bool {
    reg := regexp.MustCompile("^[u4e00-u9fa5]+$")
    return reg.MatchString(str)
}

func main() {
    testStr := "我是中文字符"
    if isAllChinese(testStr) {
        fmt.Println(testStr, "is all Chinese characters")
    } else {
        fmt.Println(testStr, "is not all Chinese characters")
    }
}

By calling the isAllChinese() function, you can also determine whether the specified string consists of all Chinese characters.

Summary:

Both of the above two methods can be used to determine whether a string consists entirely of Chinese characters. You can get better performance using the unicode package, but if you need more flexible judgment, you can use the regexp package.

At the same time, you also need to pay attention to some special situations. For example, if the input contains spaces, punctuation and other characters, it cannot be judged to be composed entirely of Chinese characters. Therefore, in actual applications, targeted verification is performed according to specific scenarios.

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