在 Go 语言中，字符串不同于Java、C++、 Python等其他语言。它是一系列可变宽度字符，其中每个字符都由一个或多个使用 UTF-8 编码的字节表示。您可以使用以下函数列表以不同方式修剪字符串。所有这些函数都定义在字符串包下，所以你必须在你的程序中导入字符串包才能访问这些函数。
1. 修剪：该函数用于修剪字符串所有在该函数中指定的前导和尾随 Unicode 代码点。
句法：
func Trim(str string, cutstr string) string这里， str表示当前字符串， cutstr表示给定字符串要修剪的元素。
例子：
// Go program to illustrate
// how to trim a string
package main
import (
"fmt"
"strings"
)
// Main method
func main() {
// Creating and initializing string
// Using shorthand declaration
str1 := "!!Welcome to GeeksforGeeks !!"
str2 := "@@This is the tutorial of Golang$$"
// Displaying strings
fmt.Println("Strings before trimming:")
fmt.Println("String 1: ", str1)
fmt.Println("String 2:", str2)
// Trimming the given strings
// Using Trim() function
res1 := strings.Trim(str1, "!")
res2 := strings.Trim(str2, "@$")
// Displaying the results
fmt.Println("\nStrings after trimming:")
fmt.Println("Result 1: ", res1)
fmt.Println("Result 2:", res2)
}
输出：
Strings before trimming:
String 1: !!Welcome to GeeksforGeeks !!
String 2: @@This is the tutorial of Golang$$
Strings after trimming:
Result 1: Welcome to GeeksforGeeks
Result 2: This is the tutorial of Golang
2. TrimLeft：该函数用于修剪字符串的左侧（在函数指定）Unicode 代码点。
句法：
func TrimLeft(str string, cutstr string) string这里， str表示当前字符串， cutstr表示要在给定字符串修剪的左侧元素。
例子：
// Go program to illustrate how to
// trim left-hand side elements
// from the string
package main
import (
"fmt"
"strings"
)
// Main method
func main() {
// Creating and initializing string
// Using shorthand declaration
str1 := "!!Welcome to GeeksforGeeks **"
str2 := "@@This is the tutorial of Golang$$"
// Displaying strings
fmt.Println("Strings before trimming:")
fmt.Println("String 1: ", str1)
fmt.Println("String 2:", str2)
// Trimming the given strings
// Using TrimLeft() function
res1 := strings.TrimLeft(str1, "!*")
res2 := strings.TrimLeft(str2, "@")
// Displaying the results
fmt.Println("\nStrings after trimming:")
fmt.Println("Result 1: ", res1)
fmt.Println("Result 2:", res2)
}
输出：
Strings before trimming:
String 1: !!Welcome to GeeksforGeeks **
String 2: @@This is the tutorial of Golang$$
Strings after trimming:
Result 1: Welcome to GeeksforGeeks **
Result 2: This is the tutorial of Golang$$
3. TrimRight：该函数用于修剪字符串右侧（函数指定的）Unicode 码点。
句法：
func TrimRight(str string, cutstr string) string这里， str表示当前字符串， cutstr表示要在给定字符串修剪的右侧元素。
例子：
// Go program to illustrate how to
// trim right-hand side elements
// from the string
package main
import (
"fmt"
"strings"
)
// Main method
func main() {
// Creating and initializing the
// string using shorthand declaration
str1 := "!!Welcome to GeeksforGeeks **"
str2 := "@@This is the tutorial of Golang$$"
// Displaying strings
fmt.Println("Strings before trimming:")
fmt.Println("String 1: ", str1)
fmt.Println("String 2:", str2)
// Trimming the given strings
// Using TrimRight() function
res1 := strings.TrimRight(str1, "!*")
res2 := strings.TrimRight(str2, "$")
// Displaying the results
fmt.Println("\nStrings after trimming:")
fmt.Println("Result 1: ", res1)
fmt.Println("Result 2:", res2)
}
输出：
Strings before trimming:
String 1: !!Welcome to GeeksforGeeks **
String 2: @@This is the tutorial of Golang$$
Strings after trimming:
Result 1: !!Welcome to GeeksforGeeks
Result 2: @@This is the tutorial of Golang
4. TrimSpace：该函数用于修剪指定字符串的所有前导和尾随空格。
句法：
func TrimSpace(str string) string例子：
// Go program to illustrate how to
// trim white space from the string
package main
import (
"fmt"
"strings"
)
// Main method
func main() {
// Creating and initializing string
// Using shorthand declaration
str1 := " **Welcome to GeeksforGeeks** "
str2 := " ##This is the tutorial of Golang## "
// Displaying strings
fmt.Println("Strings before trimming:")
fmt.Println(str1, str2)
// Trimming white space from the given strings
// Using TrimSpace() function
res1 := strings.TrimSpace(str1)
res2 := strings.TrimSpace(str2)
// Displaying the results
fmt.Println("\nStrings after trimming:")
fmt.Println(res1, res2)
}
输出：
Strings before trimming:
**Welcome to GeeksforGeeks** ##This is the tutorial of Golang##
Strings after trimming:
**Welcome to GeeksforGeeks** ##This is the tutorial of Golang##
5. TrimSuffix：该方法是用来修整从给定的字符串尾部后缀字符串。如果给定的字符串不包含指定的后缀字符串，则此函数返回原始字符串而不做任何更改。
句法：
func TrimSuffix(str, suffstr string) string这里， str表示原始字符串， suffstr表示后缀字符串 。
例子：
// Go program to illustrate how to
// trim a suffix string from the
// given string
package main
import (
"fmt"
"strings"
)
// Main method
func main() {
// Creating and initializing string
// Using shorthand declaration
str1 := "Welcome, GeeksforGeeks"
str2 := "This is the, tutorial of Golang"
// Displaying strings
fmt.Println("Strings before trimming:")
fmt.Println("String 1: ", str1)
fmt.Println("String 2:", str2)
// Trimming suffix string from the given strings
// Using TrimSuffix() function
res1 := strings.TrimSuffix(str1, "GeeksforGeeks")
res2 := strings.TrimSuffix(str2, "Hello")
// Displaying the results
fmt.Println("\nStrings after trimming:")
fmt.Println("Result 1: ", res1)
fmt.Println("Result 2:", res2)
}
输出：
Strings before trimming:
String 1: Welcome, GeeksforGeeks
String 2: This is the, tutorial of Golang
Strings after trimming:
Result 1: Welcome,
Result 2: This is the, tutorial of Golang
6. TrimPrefix：该方法是用来修整从给定字符串前导前缀字符串。如果给定的字符串不包含指定的前缀字符串，则此函数返回原始字符串而不做任何更改。
句法：
func TrimPrefix(str, suffstr string) string这里， str代表原始字符串， suffstr代表前缀字符串。
例子：
// Go program to illustrate how to
// trim the prefix string from the
// given string
package main
import (
"fmt"
"strings"
)
// Main method
func main() {
// Creating and initializing string
// Using shorthand declaration
str1 := "Welcome, GeeksforGeeks"
str2 := "This is the, tutorial of Golang"
// Displaying strings
fmt.Println("Strings before trimming:")
fmt.Println("String 1: ", str1)
fmt.Println("String 2: ", str2)
// Trimming prefix string from the given strings
// Using TrimPrefix() function
res1 := strings.TrimPrefix(str1, "Welcome")
res2 := strings.TrimPrefix(str2, "Hello")
// Displaying the results
fmt.Println("\nStrings after trimming:")
fmt.Println("Result 1: ", res1)
fmt.Println("Result 2: ", res2)
}
输出：
Strings before trimming:
String 1: Welcome, GeeksforGeeks
String 2: This is the, tutorial of Golang
Strings after trimming:
Result 1: , GeeksforGeeks
Result 2: This is the, tutorial of Golang