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用Java读取数据

发布于 2024-12-11 06:14:47 字数 79 浏览 0 评论 0原文

使用 BufferedReader 和 BufferedInputStream 有什么区别？

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抹茶夏天i‖ 2024-12-18 06:14:47

BufferedReader 用于读取字符数据。 BufferedOutputStream 用于写入二进制数据。

继承自 Reader< 的任何类/a> 或 Writer< /a> 处理 16 位 unicode 字符数据，而从 InputStream 或 OutputStream 涉及处理二进制数据。类 InputStreamReader 和 OutputStreamWriter 可用于桥接两类数据。

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汹涌人海 2024-12-18 06:14:47

Bufferedreader 从文件中以字符串形式读取数据。 BufferedOutputStream 以字节为单位写入文件。 BufferedInputStream 以字节为单位读取数据
Bufferedreader 的示例：

try {
       BufferedReader br = new BufferedReader(new FileReader(new File(your_file));
       while ((thisLine = br.readLine()) != null) { 
         System.out.println(thisLine);
       }
     }

BufferedOutputStream 的示例：

//Construct the BufferedOutputStream object
        bufferedOutput = new BufferedOutputStream(new FileOutputStream(filename));

        //Start writing to the output stream
        bufferedOutput.write("Line 1".getBytes());
        bufferedOutput.write("\r\n".getBytes());
        bufferedOutput.write("Line 2".getBytes());
        bufferedOutput.write("\r\n".getBytes());

Bufferedinputstream 以字节读取：
样本
:

 //Construct the BufferedInputStream object
        bufferedInput = new BufferedInputStream(new FileInputStream(filename));

        int bytesRead = 0;


        while ((bytesRead = bufferedInput.read(buffer)) != -1) {                

            String chunk = new String(buffer, 0, bytesRead);
            System.out.print(chunk);
        }

Bufferedreader reads data from a file as a string. BufferedOutputStream writes to a file in bytes. BufferedInputStream reads data in bytes
Sample to Bufferedreader:

try {
       BufferedReader br = new BufferedReader(new FileReader(new File(your_file));
       while ((thisLine = br.readLine()) != null) { 
         System.out.println(thisLine);
       }
     }

Sample to BufferedOutputStream:

//Construct the BufferedOutputStream object
        bufferedOutput = new BufferedOutputStream(new FileOutputStream(filename));

        //Start writing to the output stream
        bufferedOutput.write("Line 1".getBytes());
        bufferedOutput.write("\r\n".getBytes());
        bufferedOutput.write("Line 2".getBytes());
        bufferedOutput.write("\r\n".getBytes());

Bufferedinputstream reads in byte:
Sample
:

 //Construct the BufferedInputStream object
        bufferedInput = new BufferedInputStream(new FileInputStream(filename));

        int bytesRead = 0;


        while ((bytesRead = bufferedInput.read(buffer)) != -1) {                

            String chunk = new String(buffer, 0, bytesRead);
            System.out.print(chunk);
        }

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