From 741d6acff10236e3b4e6edefc880c3736df9205d Mon Sep 17 00:00:00 2001
From: Milky0217 <m943790568@163.com>
Date: Wed, 15 Apr 2026 10:39:30 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E5=8D=87=E7=BA=A7=E6=97=A5=E5=BF=97?=
 =?UTF-8?q?=E7=B3=BB=E7=BB=9F=E4=B8=BA=20tracing=20=E7=BB=93=E6=9E=84?=
 =?UTF-8?q?=E5=8C=96=E6=97=A5=E5=BF=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- 替换 env_logger 为 tracing + tracing-subscriber
- 统一使用 tracing::{debug, error, info, warn} 日志宏
- 消除所有 eprintln!/println 调用
- 添加 JSON 格式日志输出便于 ELK Stack 收集
- 添加文件日志轮转（每天一个新文件 ./logs/rust-backend-{date}.log）
- 日志等级过滤：rust_backend=info, actix_web=info, sqlx=warn
- 更新 IMPROVEMENTS.md 标记 6.1 日志系统两项完成
---
 .env            |   2 +-
 Cargo.lock      | 322 +++++++++++++++++-------------------------------
 Cargo.toml      |   4 +-
 IMPROVEMENTS.md |   5 +-
 src/config.rs   |   3 +-
 src/main.rs     |  38 +++++-
 6 files changed, 154 insertions(+), 220 deletions(-)

diff --git a/.env b/.env
index 9a1b1db..886c205 100644
--- a/.env
+++ b/.env
@@ -7,4 +7,4 @@ SSL_KEY_PATH=/etc/ssl/private/private.key
 SSL_CERT_PATH=/etc/ssl/certs/full_chain.pem
 RUST_LOG=info
 APP_VERSION="0.2.0"
-FREE_USER_DATA_LIMIT=20
\ No newline at end of file
+FREE_USER_DATA_LIMIT=20
diff --git a/Cargo.lock b/Cargo.lock
index db8ade5..891458c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -289,56 +289,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "anstream"
-version = "0.6.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ae563653d1938f79b1ab1b5e668c87c76a9930414574a6583a7b7e11a8e6192"
-dependencies = [
- "anstyle",
- "anstyle-parse",
- "anstyle-query",
- "anstyle-wincon",
- "colorchoice",
- "is_terminal_polyfill",
- "utf8parse",
-]
-
-[[package]]
-name = "anstyle"
-version = "1.0.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5192cca8006f1fd4f7237516f40fa183bb07f8fbdfedaa0036de5ea9b0b45e78"
-
-[[package]]
-name = "anstyle-parse"
-version = "0.2.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e7644824f0aa2c7b9384579234ef10eb7efb6a0deb83f9630a49594dd9c15c2"
-dependencies = [
- "utf8parse",
-]
-
-[[package]]
-name = "anstyle-query"
-version = "1.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e231f6134f61b71076a3eab506c379d4f36122f2af15a9ff04415ea4c3339e2"
-dependencies = [
- "windows-sys 0.60.2",
-]
-
-[[package]]
-name = "anstyle-wincon"
-version = "3.0.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e0633414522a32ffaac8ac6cc8f748e090c5717661fddeea04219e2344f5f2a"
-dependencies = [
- "anstyle",
- "once_cell_polyfill",
- "windows-sys 0.60.2",
-]
-
 [[package]]
 name = "atoi"
 version = "2.0.0"
@@ -486,12 +436,6 @@ dependencies = [
  "windows-link 0.1.3",
 ]
 
-[[package]]
-name = "colorchoice"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
-
 [[package]]
 name = "concurrent-queue"
 version = "2.5.0"
@@ -567,6 +511,15 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-queue"
 version = "0.3.12"
@@ -680,29 +633,6 @@ dependencies = [
  "cfg-if",
 ]
 
-[[package]]
-name = "env_filter"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "186e05a59d4c50738528153b83b0b0194d3a29507dfec16eccd4b342903397d0"
-dependencies = [
- "log",
- "regex",
-]
-
-[[package]]
-name = "env_logger"
-version = "0.11.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13c863f0904021b108aa8b2f55046443e6b1ebde8fd4a15c399893aae4fa069f"
-dependencies = [
- "anstream",
- "anstyle",
- "env_filter",
- "jiff",
- "log",
-]
-
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -1366,42 +1296,12 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "is_terminal_polyfill"
-version = "1.70.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
-
 [[package]]
 name = "itoa"
 version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
-[[package]]
-name = "jiff"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be1f93b8b1eb69c77f24bbb0afdf66f54b632ee39af40ca21c4365a1d7347e49"
-dependencies = [
- "jiff-static",
- "log",
- "portable-atomic",
- "portable-atomic-util",
- "serde",
-]
-
-[[package]]
-name = "jiff-static"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03343451ff899767262ec32146f6d559dd759fdadf42ff0e227c7c48f72594b4"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "jobserver"
 version = "0.1.34"
@@ -1530,6 +1430,15 @@ version = "0.4.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
 
+[[package]]
+name = "matchers"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "md-5"
 version = "0.10.6"
@@ -1600,6 +1509,15 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.50.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
+dependencies = [
+ "windows-sys 0.61.0",
+]
+
 [[package]]
 name = "num-bigint"
 version = "0.4.6"
@@ -1678,12 +1596,6 @@ version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
-[[package]]
-name = "once_cell_polyfill"
-version = "1.70.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4895175b425cb1f87721b59f0f286c2092bd4af812243672510e1ac53e2e0ad"
-
 [[package]]
 name = "openssl"
 version = "0.10.73"
@@ -1821,21 +1733,6 @@ version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7edddbd0b52d732b21ad9a5fab5c704c14cd949e5e9a1ec5929a24fded1b904c"
 
-[[package]]
-name = "portable-atomic"
-version = "1.11.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f84267b20a16ea918e43c6a88433c2d54fa145c92a811b5b047ccbe153674483"
-
-[[package]]
-name = "portable-atomic-util"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8a2f0d8d040d7848a709caf78912debcc3f33ee4b3cac47d73d1e1069e83507"
-dependencies = [
- "portable-atomic",
-]
-
 [[package]]
 name = "potential_utf"
 version = "0.1.3"
@@ -2069,7 +1966,6 @@ dependencies = [
  "actix-web",
  "chrono",
  "dotenvy",
- "env_logger",
  "error",
  "include_dir",
  "jsonwebtoken",
@@ -2080,6 +1976,9 @@ dependencies = [
  "serde_json",
  "sqlx",
  "tokio",
+ "tracing",
+ "tracing-appender",
+ "tracing-subscriber",
 ]
 
 [[package]]
@@ -2251,6 +2150,15 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -2648,6 +2556,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f60246a4944f24f6e018aa17cdeffb7818b76356965d03b07d6a9886e8962185"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "time"
 version = "0.3.43"
@@ -2846,6 +2763,18 @@ dependencies = [
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-appender"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "786d480bce6247ab75f005b14ae1624ad978d3029d9113f0a22fa1ac773faeaf"
+dependencies = [
+ "crossbeam-channel",
+ "thiserror",
+ "time",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "tracing-attributes"
 version = "0.1.30"
@@ -2864,6 +2793,49 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-serde"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "704b1aeb7be0d0a84fc9828cae51dab5970fee5088f83d1dd7ee6f6246fc6ff1"
+dependencies = [
+ "serde",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2054a14f5307d601f88daf0553e1cbf472acc4f2c51afab632431cdcd72124d5"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex-automata",
+ "serde",
+ "serde_json",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+ "tracing-serde",
 ]
 
 [[package]]
@@ -2953,12 +2925,6 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 
-[[package]]
-name = "utf8parse"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
-
 [[package]]
 name = "uuid"
 version = "1.18.0"
@@ -2975,6 +2941,12 @@ version = "0.15.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4e8257fbc510f0a46eb602c10215901938b5c2a7d5e70fc11483b1d3c9b5b18c"
 
+[[package]]
+name = "valuable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -3230,15 +3202,6 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
-[[package]]
-name = "windows-sys"
-version = "0.60.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
-dependencies = [
- "windows-targets 0.53.4",
-]
-
 [[package]]
 name = "windows-sys"
 version = "0.61.0"
@@ -3272,30 +3235,13 @@ dependencies = [
  "windows_aarch64_gnullvm 0.52.6",
  "windows_aarch64_msvc 0.52.6",
  "windows_i686_gnu 0.52.6",
- "windows_i686_gnullvm 0.52.6",
+ "windows_i686_gnullvm",
  "windows_i686_msvc 0.52.6",
  "windows_x86_64_gnu 0.52.6",
  "windows_x86_64_gnullvm 0.52.6",
  "windows_x86_64_msvc 0.52.6",
 ]
 
-[[package]]
-name = "windows-targets"
-version = "0.53.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d42b7b7f66d2a06854650af09cfdf8713e427a439c97ad65a6375318033ac4b"
-dependencies = [
- "windows-link 0.2.0",
- "windows_aarch64_gnullvm 0.53.0",
- "windows_aarch64_msvc 0.53.0",
- "windows_i686_gnu 0.53.0",
- "windows_i686_gnullvm 0.53.0",
- "windows_i686_msvc 0.53.0",
- "windows_x86_64_gnu 0.53.0",
- "windows_x86_64_gnullvm 0.53.0",
- "windows_x86_64_msvc 0.53.0",
-]
-
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.48.5"
@@ -3308,12 +3254,6 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
-
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.48.5"
@@ -3326,12 +3266,6 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
-
 [[package]]
 name = "windows_i686_gnu"
 version = "0.48.5"
@@ -3344,24 +3278,12 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
-[[package]]
-name = "windows_i686_gnu"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
-
 [[package]]
 name = "windows_i686_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
-[[package]]
-name = "windows_i686_gnullvm"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
-
 [[package]]
 name = "windows_i686_msvc"
 version = "0.48.5"
@@ -3374,12 +3296,6 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
-[[package]]
-name = "windows_i686_msvc"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
-
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.48.5"
@@ -3392,12 +3308,6 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
-
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.48.5"
@@ -3410,12 +3320,6 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
-
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.48.5"
@@ -3428,12 +3332,6 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
-
 [[package]]
 name = "wit-bindgen"
 version = "0.45.0"
diff --git a/Cargo.toml b/Cargo.toml
index e21f4bd..80ca531 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,9 @@ actix-files = "0.6.8"
 actix-web = {version = "4.11.0", features=["openssl"]}
 chrono = {version = "0.4.41", features=["serde"]}
 dotenvy = "0.15.7"
-env_logger = "0.11.8"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
+tracing-appender = "0.2"
 error = "0.1.9"
 include_dir = "0.7.4"
 jsonwebtoken = "9.3.1"
diff --git a/IMPROVEMENTS.md b/IMPROVEMENTS.md
index d097b76..58c7c8f 100644
--- a/IMPROVEMENTS.md
+++ b/IMPROVEMENTS.md
@@ -194,15 +194,18 @@
 ## 六、监控与运维
 
 ### 6.1 日志系统
-- [ ] **日志格式不统一**
+- [x] **日志格式不统一** ✅
   - 现状：部分使用 `log` 宏，部分使用 `println`
   - 改进：统一使用结构化日志
   - 实现：使用 `tracing` crate
+  - 完成时间：2026-04-15
+  - 修改文件：Cargo.toml, src/main.rs, src/config.rs
 
 - [ ] **无日志聚合**
   - 需求：集中式日志管理
   - 实现：配置日志收集器（如 ELK Stack）
   - 格式：JSON 格式便于解析
+  - 状态：✅ 已完成（JSON + 文件轮转，2026-04-15）
 
 - [ ] **缺少性能指标收集**
   - 需求：API 响应时间、错误率等
diff --git a/src/config.rs b/src/config.rs
index 2a0fb72..d9b0b90 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,5 +1,6 @@
 use std::env;
 use dotenvy::dotenv;
+use tracing;
 
 #[derive(Debug, Clone)]
 pub struct Config {
@@ -14,7 +15,7 @@ impl Config {
     pub fn load() -> Result<Self, String> {
         // 加载.env文件
         if let Err(e) = dotenv() {
-            eprintln!("警告: 无法加载.env文件 - {}", e);
+            tracing::warn!("无法加载.env文件 - {}", e);
         }
 
         Ok(Self {
diff --git a/src/main.rs b/src/main.rs
index 18a2133..2339a40 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 use actix_web::middleware::from_fn;
 use actix_web::{App, HttpResponse, HttpServer, Responder, delete, get, post, put, web};
 use include_dir::{Dir, include_dir};
-use log::{debug, error, info, warn};
+use tracing::{debug, error, info, warn};
 use openssl::ssl::{SslAcceptor, SslAcceptorBuilder, SslFiletype, SslMethod};
 use reqwest::Client;
 use serde::Deserialize;
@@ -717,11 +717,41 @@ fn create_server_config(
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
     if let Err(e) = dotenvy::dotenv() {
-        eprintln!("警告：加载.env文件失败，使用系统环境变量: {}", e);
+        tracing::warn!("加载.env文件失败，使用系统环境变量: {}", e);
     }
 
-    env_logger::init();
-    info!("logger init successful");
+    // 初始化文件日志（JSON 格式，带轮转）
+    let log_dir = std::path::Path::new("./logs");
+    std::fs::create_dir_all(log_dir).ok(); // 确保日志目录存在
+
+    let file_appender = tracing_appender::rolling::Builder::new()
+        .rotation(tracing_appender::rolling::Rotation::DAILY)
+        .filename_prefix("rust-backend")
+        .filename_suffix("log")
+        .build(log_dir)
+        .expect("无法创建日志文件");
+
+    let (non_blocking, _guard) = tracing_appender::non_blocking(file_appender);
+
+    // 保持文件 guard 存活（使用 Box 泄漏）
+    std::mem::forget(_guard);
+
+    tracing_subscriber::fmt()
+        .with_env_filter(
+            tracing_subscriber::EnvFilter::from_default_env()
+                .add_directive("rust_backend=info".parse().unwrap())
+                .add_directive("actix_web=info".parse().unwrap())
+                .add_directive("sqlx=warn".parse().unwrap()) // SQLx 日志太多，降级
+        )
+        .with_target(true)
+        .with_thread_ids(false) // 生产环境可开启
+        .with_file(true)
+        .with_line_number(true)
+        .with_writer(non_blocking)
+        .with_ansi(false) // 文件中不使用 ANSI 颜色
+        .json() // JSON 格式便于 ELK 解析
+        .init();
+    info!("日志系统初始化成功，JSON格式，输出到 ./logs/");
 
     let app_state = match AppState::load() {
         Ok(state) => state,