文件写入支持覆盖写入与追加写入支持
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.gitignore
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.gitignore
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@ -19,4 +19,5 @@
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.idea
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.vscode
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*_test.go
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*.txt
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28
file.go
28
file.go
@ -50,6 +50,7 @@ type fileOperate struct {
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permission os.FileMode
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openFlag int
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fileHandler *os.File
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clearHasContent bool // 文件写入时, 清空现有内容(覆盖写入), 默认追加写入
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}
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// IsExist 文件是否存在
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@ -75,6 +76,7 @@ func (f *fileOperate) IsExist() (bool, bool, error) {
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// Date : 12:28 2022/5/22
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func (f *fileOperate) AutoCreate() *fileOperate {
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f.autoCreate = true
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f.openFlag = f.openFlag | os.O_CREATE
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return f
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}
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@ -95,11 +97,26 @@ func (f *fileOperate) Permission(fileModel os.FileMode) *fileOperate {
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// Date : 13:40 2022/5/22
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func (f *fileOperate) SetOpenFlag(flagList ...int) *fileOperate {
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for _, flag := range flagList {
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if flag == os.O_CREATE {
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f.AutoCreate()
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continue
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}
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f.openFlag = f.openFlag | flag
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}
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return f
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}
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// SetClearHasContentForWrite 设置覆盖写入文件内容
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 16:41 2022/5/22
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func (f *fileOperate) SetClearHasContentForWrite() *fileOperate {
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f.clearHasContent = true
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f.openFlag = f.openFlag | os.O_TRUNC
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return nil
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}
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// Create 创建文件
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//
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// Author : go_developer@163.com<白茶清欢>
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@ -210,6 +227,17 @@ func (f *fileOperate) Write(content []byte) error {
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return errors.New("文件打开失败 : " + err.Error())
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}
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}
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if f.clearHasContent {
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// 覆盖写入
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if err := os.Truncate(f.filePath, 0); nil != err {
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return err
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}
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n, _ := f.fileHandler.Seek(0, io.SeekEnd)
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_, writeErr := f.fileHandler.WriteAt(content, n)
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return writeErr
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}
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// 追加写入
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_, writeErr := f.fileHandler.Write(content)
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return writeErr
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}
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