refactor(deps):ORM库切换为Xorm，同时增加保证数据库连接的配置。

global/db.go

@@ -2,38 +2,36 @@ package global
 
 import (
 	"fmt"
+	"time"
 
 	"electricity_bill_calc/config"
 
-	"gorm.io/driver/postgres"
-	"gorm.io/gorm"
+	_ "github.com/lib/pq"
+	"xorm.io/xorm"
 )
 
 var (
-	DBConn *gorm.DB
+	DBConn *xorm.Engine
 )
 
 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{})
+	DBConn, err = xorm.NewEngine("postgres", fmt.Sprintf(
+		"host=%s user=%s password=%s dbname=%s port=%d sslmode=disable TimeZone=Asia/Shanghai connect_timeout=0",
+		config.DatabaseSettings.Host,
+		config.DatabaseSettings.User,
+		config.DatabaseSettings.Pass,
+		config.DatabaseSettings.DB,
+		config.DatabaseSettings.Port,
+	))
 	if err != nil {
 		return err
 	}
 
-	db, err := DBConn.DB()
-	if err != nil {
-		return err
-	}
-	db.SetMaxIdleConns(config.DatabaseSettings.MaxIdleConns)
-	db.SetMaxOpenConns(config.DatabaseSettings.MaxOpenConns)
+	DBConn.Ping()
+	DBConn.SetMaxIdleConns(config.DatabaseSettings.MaxIdleConns)
+	DBConn.SetMaxOpenConns(config.DatabaseSettings.MaxOpenConns)
+	DBConn.SetConnMaxLifetime(60 * time.Second)
 
 	return nil
 }