build(init):创建基本项目结构。

global/db.go

@@ -0,0 +1,39 @@
+package global
+
+import (
+	"fmt"
+
+	"electricity_bill_calc/config"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+var (
+	DBConn *gorm.DB
+)
+
+func SetupDatabaseConnection() error {
+	var err error
+	DBConn, err = gorm.Open(postgres.New(postgres.Config{
+		DSN: fmt.Sprintf(
+			"host=%s user=%s password=%s dbname=%s port=%d sslmode=disable TimeZone=Asia/Shanghai",
+			config.DatabaseSettings.Host,
+			config.DatabaseSettings.User,
+			config.DatabaseSettings.Pass,
+			config.DatabaseSettings.DB,
+			config.DatabaseSettings.Port),
+	}), &gorm.Config{})
+	if err != nil {
+		return err
+	}
+
+	db, err := DBConn.DB()
+	if err != nil {
+		return err
+	}
+	db.SetMaxIdleConns(config.DatabaseSettings.MaxIdleConns)
+	db.SetMaxOpenConns(config.DatabaseSettings.MaxOpenConns)
+
+	return nil
+}

global/redis.go

@@ -0,0 +1,26 @@
+package global
+
+import (
+	"electricity_bill_calc/config"
+	"fmt"
+
+	"github.com/go-redis/redis"
+)
+
+var (
+	RedisConn *redis.Client
+)
+
+func SetupRedisConnection() error {
+	RedisConn = redis.NewClient(&redis.Options{
+		Addr:     fmt.Sprintf("%s:%d", config.RedisSettings.Host, config.RedisSettings.Port),
+		Password: config.RedisSettings.Password,
+		DB:       config.RedisSettings.DB,
+	})
+
+	_, err := RedisConn.Ping().Result()
+	if err != nil {
+		return err
+	}
+	return nil
+}