fix

blog/golang/golang-standard.md

@@ -6,7 +6,6 @@
 
 os模块实现了平台无关的编程接口
 
-
 创建文件
 
 ```go
@@ -27,7 +26,7 @@ func main() {
         fmt.Printf("file.Name(): %v\n", file.Name())
         // file.Name(): demo.txt
     }
-}
+} 
 
 ```
 
@@ -222,4 +221,131 @@ func main() {
     }
 }
 
+```
+
+### File文件读写操作
+
+打开现有文件
+
+```go
+
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+func main() {
+    f, err := os.Open("demo.txt")
+
+    if err != nil {
+        fmt.Printf("err: %v\n", err)
+    } else {
+        fmt.Printf("f.Name(): %v\n", f.Name())
+        // f.Name(): demo.txt
+        f.Close()
+    }
+}
+
+```
+
+如果不存在则创建
+
+```go
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+func main() {
+    // 如果不存在则创建
+    f, err := os.OpenFile("demo.txt", os.O_RDWR|os.O_CREATE, os.ModePerm)
+
+    if err != nil {
+        fmt.Printf("err: %v\n", err)
+    } else {
+        fmt.Printf("f.Name(): %v\n", f.Name())
+        // f.Name(): demo.txt
+        f.Close()
+    }
+}
+
+```
+
+其他方法
+
+```go
+// 等价于：OpenFile(name, O_RDWR|O_CREATE|O_TRUNC, 0666)
+f, err := os.Create("demo.txt")
+
+
+// 创建临时文件
+f, _ := os.CreateTemp("", "test")
+fmt.Printf("f.Name(): %v\n", f.Name())
+// f.Name(): /var/folders/43/llymqbps19d74q2h_bgb00mr0000gn/T/test218970504
+
+
+// 从指定字节数开始读取
+n, err := f.ReadAt(buf, 3)
+
+// 定位光标
+f.Seek(3, 0)
+```
+
+按照字节数去取文件
+
+```go
+package main
+
+import (
+    "fmt"
+    "io"
+    "os"
+)
+
+func main() {
+    f, _ := os.Open("demo.txt")
+
+    for {
+        // 字节缓冲区
+        buf := make([]byte, 3)
+
+        n, err := f.Read(buf)
+
+        if err == io.EOF {
+            break
+        }
+
+        fmt.Printf("n: %v\n", n)
+        fmt.Printf("string(buf): %v\n", string(buf))
+    }
+
+    f.Close()
+}
+
+```
+
+遍历目录
+
+```go
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+func main() {
+    dirs, _ := os.ReadDir("./")
+    for _, dir := range dirs {
+        // 判断是否是目录
+        fmt.Printf("dir: %v\n", dir.IsDir())
+        // 输出名称
+        fmt.Printf("dir: %v\n", dir.Name())
+    }
+}
+
 ```
\ No newline at end of file

blog/golang/index.md

@@ -54,4 +54,5 @@
 https://www.bilibili.com/video/BV1ME411Y71o?p=27&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
 
 
-https://www.bilibili.com/video/BV1zR4y1t7Wj/?p=79&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
+
\ No newline at end of file
+https://www.bilibili.com/video/BV1zR4y1t7Wj?p=80&vd_source=efbb4dc944fa761b6e016ce2ca5933da
\ No newline at end of file