-----------------------------------------------------
package main
import (
"fmt"
)
func main() {
//多维map的声明与实现方法
//方法1 初始化一个空的多维映射
mainMapA := map[string]map[string]string{}
subMapA := map[string]string{"A_Key_1": "A_SubValue_1","A_Key_2": "A_SubValue_2"}
mainMapA["MapA"] = subMapA
fmt.Println("MultityMapA")
for keyA,valA := range mainMapA {
for subKeyA,subValA := range valA {
fmt.Printf("mapName=%s Key=%s Value=%s\n",keyA,subKeyA,subValA)
}
}
//方法2 使用make声明一个多维映射(等同一般声明)
//var mainMap map[string]map[string]string
mainMapB := make(map[string]map[string]string)
//内部容器必须再次初始化才能使用
subMapB := make(map[string]string)
subMapB["B_Key_1"] = "B_SubValue_1"
subMapB["B_Key_2"] = "B_SubValue_2"
mainMapB["MapB"] = subMapB
fmt.Println("\nMultityMapB")
for keyB,valB := range mainMapB {
for subKeyB,subValB := range valB {
fmt.Printf("mapName=%s Key=%s Value=%s\n",keyB,subKeyB,subValB)
}
}
/* 方法3 使用interface{}初始化一个一维映射
* 关键点：interface{} 可以代表任意类型
* 原理知识点:interface{} 就是一个空接口，所有类型都实现了这个接口，所以它可以代表所有类型
*/
//mainMapC := make(map[string]interface{})
mainMapC := map[string]interface{}{}
subMapC := make(map[string]string)
subMapC["C_Key_1"] = "C_SubValue_1"
subMapC["C_Key_2"] = "C_SubValue_2"
mainMapC["MapC"] = subMapC
fmt.Println("\nMultityMapC")
for keyC,valC := range mainMapC {
//此处必须实例化接口类型，即*.(map[string]string)
//subMap := valC.(map[string]string)
for subKeyC,subValC := range valC.(map[string]string) {
fmt.Printf("mapName=%s Key=%s Value=%s\n",keyC,subKeyC,subValC)
}
}
}
运行结果