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                bufio包實現了帶緩沖區的讀寫,是對文件讀寫的封裝 | 模式 | 含義 | | --- | --- | | os.O\_WRONLY | 只寫 | | os.O\_CREATE | 創建文件 | | os.O\_RDONLY | 只讀 | | os.O\_RDWR | 讀寫 | | os.O\_TRUNC | 清空 | | os.O\_APPEND | 追加 | #### bufio.NewReader 有時候我們想完整獲取輸入的內容,而輸入的內容可能包含空格,這種情況下可以使用bufio包來實現。示例代碼如下: ~~~ func bufioDemo() { reader := bufio.NewReader(os.Stdin) // 從標準輸入生成讀對象 fmt.Print("請輸入內容:") text, _ := reader.ReadString('\n') // 讀到換行 text = strings.TrimSpace(text) fmt.Printf("%#v\n", text) } ~~~ ~~~ func wr() { // 參數2:打開模式,所有模式d都在上面 // 參數3是權限控制 // w寫 r讀 x執行 w 2 r 4 x 1 file, err := os.OpenFile("./xxx.txt", os.O_CREATE|os.O_WRONLY, 0666) if err != nil { return } defer file.Close() // 獲取writer對象 writer := bufio.NewWriter(file) for i := 0; i < 10; i++ { writer.WriteString("hello\n") } // 刷新緩沖區,強制寫出 writer.Flush() } func re() { file, err := os.Open("./xxx.txt") if err != nil { return } defer file.Close() reader := bufio.NewReader(file) for { line, _, err := reader.ReadLine() if err == io.EOF { break } if err != nil { return } fmt.Println(string(line)) } } ~~~
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