文件输入输出流--字符

<h1>字符流</h1> <pre><code> 字符输入流Reader 字符输出流Writer</code></pre> <h4>字浮流的常用函数</h4> <p><img src="https://www.showdoc.com.cn/server/api/attachment/visitfile/sign/d7edf3da31cfbf92806e533bbf5bc643?showdoc=.jpg" alt="" /> <img src="https://www.showdoc.com.cn/server/api/attachment/visitfile/sign/60ee5c8db55f479ef54645fff6edf8b6?showdoc=.jpg" alt="" /></p> <pre><code> 字节输入输出流：读取和写入数据都是使用二进制的数据 字符输入输出流: 是用于传输字符，例如:聊天时传入是"字符串" 进过解成二进制发送给对方对方读取的时候不希望看到的是 二进制 就需要加码转化为字符串</code></pre> <h3>字节字符转换流</h3> <pre><code>InputStreamReader OutputStreamWriter</code></pre> <pre><code class="language-java"> private static InputStreamReader isr; private static OutputStreamWriter osw; public static void main(String[] args) { // TODO Auto-generated method stub String str = "D:\\runtime\\cache\\20.txt"; String str_cp = "D:\\runtime\\cache\\20_read.txt"; try { // 字节流输入 FileInputStream fis = new FileInputStream(str); // 字符流转字节流 isr = new InputStreamReader(fis); BufferedReader Br = new BufferedReader(isr); // 写数据 FileOutputStream fos = new FileOutputStream(str_cp); osw = new OutputStreamWriter(fos); BufferedWriter bw = new BufferedWriter(osw); int n = 0; char[] cbuf = new char[10]; // 单行读取 // while((n = isr.read()) != -1) { // System.out.print((char)n); // } // 制定字节读取 // while((n = isr.read(cbuf)) != -1) { // String s = new String(cbuf,0,n); // System.out.print(s); // } // 写入操作 while((n = Br.read(cbuf)) != -1) { bw.write(cbuf,0,n); bw.flush(); } fis.close(); osw.close(); isr.close(); bw.close(); Br.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); }catch(IOException e) { e.printStackTrace(); } }</code></pre> <h3>缓冲流</h3> <pre><code>BufferedReader 文件缓冲读取 BufferedWriter 文件缓冲写入</code></pre>