55 lines
1.2 KiB
Markdown
55 lines
1.2 KiB
Markdown
# Go 文件操作
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## 1.文本文件
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### 1.1.创建
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```go
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f,err := os.Create(fileName)
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defer f.Close()
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if err !=nil {
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fmt.Println(err.Error())
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} else {
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_,err=f.Write([]byte("要写入的文本内容"))
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checkErr(err)
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}
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```
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### 1.2.读取
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```go
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f, err := os.OpenFile(fileName, os.O_RDONLY,0600)
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defer f.Close()
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if err !=nil {
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fmt.Println(err.Error())
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} else {
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contentByte,err=ioutil.ReadAll(f)
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checkErr(err)
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fmt.Println(string(contentByte))
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}
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```
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打开模式如下：
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```go
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//打开方式
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const (
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//只读模式
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O_RDONLY int = syscall.O_RDONLY // open the file read-only.
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//只写模式
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O_WRONLY int = syscall.O_WRONLY // open the file write-only.
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//可读可写
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O_RDWR int = syscall.O_RDWR // open the file read-write.
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//追加内容
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O_APPEND int = syscall.O_APPEND // append data to the file when writing.
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//创建文件,如果文件不存在
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O_CREATE int = syscall.O_CREAT // create a new file if none exists.
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//与创建文件一同使用,文件必须存在
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O_EXCL int = syscall.O_EXCL // used with O_CREATE, file must not exist
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//打开一个同步的文件流
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O_SYNC int = syscall.O_SYNC // open for synchronous I/O.
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//如果可能,打开时缩短文件
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O_TRUNC int = syscall.O_TRUNC // if possible, truncate file when opened.
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)
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```
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