feat: 日志改为同时输出到GUI窗口和log/日期.log文件

cmd/server/gui_windows.go

@@ -4,11 +4,13 @@ package main
 
 import (
 	"fmt"
+	"io"
 	"log"
 	"os"
 	"runtime"
 	"sync"
 	"syscall"
+	"time"
 	"unsafe"
 )
 
@@ -139,6 +141,47 @@ func (w *guiLogWriter) Write(p []byte) (n int, err error) {
 	return len(p), nil
 }
 
+// logFileWriter 实现 io.Writer，将日志写入 log/日期.log 文件
+type logFileWriter struct {
+	mu      sync.Mutex
+	curDate string
+	curFile *os.File
+}
+
+func (w *logFileWriter) Write(p []byte) (n int, err error) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	date := time.Now().Format("2006-01-02")
+	if date != w.curDate || w.curFile == nil {
+		if w.curFile != nil {
+			w.curFile.Close()
+			w.curFile = nil
+		}
+		if err := os.MkdirAll("./log", 0755); err != nil {
+			return 0, err
+		}
+		filename := fmt.Sprintf("./log/%s.log", date)
+		f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+		if err != nil {
+			return 0, err
+		}
+		w.curDate = date
+		w.curFile = f
+	}
+
+	return w.curFile.Write(p)
+}
+
+// initFileLog 初始化文件日志，返回 io.Writer
+func initFileLog() io.Writer {
+	w := &logFileWriter{}
+	// 写入一条启动标记
+	now := time.Now().Format("2006-01-02 15:04:05")
+	w.Write([]byte(fmt.Sprintf("====== %s 日志文件初始化完成 ======\n", now)))
+	return w
+}
+
 func appendText(text string) {
 	if hWndEdit == 0 {
 		return

cmd/server/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"log"
 	"net/http"
 
@@ -14,8 +15,8 @@ import (
 )
 
 func main() {
-	// 日志输出到GUI窗口
+	// 日志同时输出到GUI窗口和本地文件
-	log.SetOutput(&guiLogWriter{})
+	log.SetOutput(io.MultiWriter(&guiLogWriter{}, initFileLog()))
 
 	log.Printf("孔网商品定价 %s 启动中...", version)
 
@@ -29,7 +30,7 @@ func main() {
 
 	global := config.GetGlobal()
 	marshal, _ := json.Marshal(global)
-	fmt.Println("config:", string(marshal))
+	log.Printf("config: %s", string(marshal))
 
 	// 初始化数据库
 	if err := database.InitDB("./data/goods_pricing.db"); err != nil {