添加函数GetLocalIP

local_ip.go

@@ -0,0 +1,33 @@
+package q5
+
+import (
+	"fmt"
+	"net"
+)
+
+func GetLocalIP() (string, error) {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return "", err
+	}
+	for _, iface := range interfaces {
+		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
+			continue
+		}
+		addrs, err := iface.Addrs()
+		if err != nil {
+			return "", err
+		}
+		for _, addr := range addrs {
+			ipnet, ok := addr.(*net.IPNet)
+			if !ok || ipnet.IP.IsLoopback() {
+				continue
+			}
+			if ipnet.IP.To4() != nil {
+				return ipnet.IP.String(), nil
+			}
+		}
+	}
+
+	return "", fmt.Errorf("无法获取本机有效的IP地址")
+}

local_ip_test.go

@@ -0,0 +1,15 @@
+package q5
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestGetLocalIP(t *testing.T) {
+	ip, err := GetLocalIP()
+	if err != nil {
+		// 错误处理
+		t.Errorf("local ip %v error:%s", ip, err)
+	}
+	fmt.Printf("local ip:[%s]\n", ip)
+}