From d5d584c93bcd390993c2436a971ddd5cdf6c3910 Mon Sep 17 00:00:00 2001
From: hhs <386998068@qq.com>
Date: Sat, 13 Jun 2026 15:17:26 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E5=AE=9E=E7=8E=B0=20Zap=20=E6=97=A5?=
 =?UTF-8?q?=E5=BF=97=E5=B0=81=E8=A3=85?=
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- 新增 internal/logger/logger.go
- 提供 Init(level, format) 初始化全局 SugaredLogger
- 支持 json/console 两种格式
- 提供 Sync() 刷新缓冲区
---
 backend/internal/logger/logger.go | 57 +++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 backend/internal/logger/logger.go

diff --git a/backend/internal/logger/logger.go b/backend/internal/logger/logger.go
new file mode 100644
index 0000000..4c113f3
--- /dev/null
+++ b/backend/internal/logger/logger.go
@@ -0,0 +1,57 @@
+package logger
+
+import (
+	"os"
+
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+// Log 是全局 SugaredLogger，由 Init 初始化。
+var Log *zap.SugaredLogger
+
+// Init 初始化全局日志器。
+// level: "debug", "info", "warn", "error"
+// format: "json" 或 "console"
+func Init(level, format string) {
+	var lvl zapcore.Level
+	switch level {
+	case "debug":
+		lvl = zapcore.DebugLevel
+	case "warn":
+		lvl = zapcore.WarnLevel
+	case "error":
+		lvl = zapcore.ErrorLevel
+	default:
+		lvl = zapcore.InfoLevel
+	}
+
+	encoderCfg := zap.NewProductionEncoderConfig()
+	encoderCfg.TimeKey = "ts"
+	encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder
+
+	var core zapcore.Core
+	if format == "console" {
+		core = zapcore.NewCore(
+			zapcore.NewConsoleEncoder(encoderCfg),
+			zapcore.AddSync(os.Stdout),
+			lvl,
+		)
+	} else {
+		core = zapcore.NewCore(
+			zapcore.NewJSONEncoder(encoderCfg),
+			zapcore.AddSync(os.Stdout),
+			lvl,
+		)
+	}
+
+	logger := zap.New(core, zap.AddCaller(), zap.AddStacktrace(zapcore.ErrorLevel))
+	Log = logger.Sugar()
+}
+
+// Sync 刷新缓冲区，退出前调用。
+func Sync() {
+	if Log != nil {
+		_ = Log.Sync()
+	}
+}