精通！掌握Golang中常用的数据处理工具和方法

package main

import (
    "fmt"
    "strings"
)

func main() {
    str1 := "Hello"
    str2 := "World"

    // 使用"+"运算符
    result1 := str1 + " " + str2
    fmt.Println(result1)

    // 使用fmt.Sprintf()函数
    result2 := fmt.Sprintf("%s %s", str1, str2)
    fmt.Println(result2)

    // 使用strings.Join()函数
    slice := []string{str1, str2}
    result3 := strings.Join(slice, " ")
    fmt.Println(result3)
}

package main

import (
    "fmt"
    "strings"
)

func main() {
    str := "Hello,World!"
    slice := strings.Split(str, ",")
    for _, s := range slice {
        fmt.Println(s)
    }
}

package main

import (
    "fmt"
    "strings"
)

func main() {
    str := "Hello,World!"
    result := strings.Replace(str, "World", "Golang", -1)
    fmt.Println(result)
}

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    jsonStr := `{"name":"Alice","age":20}`
    var person Person
    err := json.Unmarshal([]byte(jsonStr), &person)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(person)
}

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    person := Person{
        Name: "Alice",
        Age:  20,
    }
    jsonData, err := json.Marshal(person)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(string(jsonData))
}

package main

import (
    "fmt"
    "strconv"
)

func main() {
    str := "123"
    num, err := strconv.Atoi(str)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(num)
}

package main

import (
    "fmt"
    "strconv"
)

func main() {
    num := 123
    str := strconv.Itoa(num)
    fmt.Println(str)
}