字符流：只能处理 纯文本，全部为可见字符 ——简单理解为.txt 和 html文件
节点流：Reader FileReader
Writer FileReader
一、纯文本读取
1、建立联系
2、选择流 Reader FileReader
3、读取文件 char[ ] flu = new char[ 1024 ]
4、关闭
public class Readers { public static void main(String[] args) { //1、建立联系 File src = new File("F:/test/1.txt"); //2、选择流 Reader reader=null; { try { reader = new FileReader(src); //3、读取 char[] flu = new char[1024];//缓存数组 int len = 0; while (-1!=(len=reader.read(flu))){ //字符数组转字符串 String str = new String(flu,0,len); System.out.println(str); } } catch (FileNotFoundException e) { System.out.println("源文件不存在"); e.printStackTrace(); } catch (IOException e) { System.out.println("文件读取失败"); e.printStackTrace(); }finally { //4、关闭 if (null!=reader){ try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } } }} 二、纯文本写出
1、建立联系
2、选择流 Writer FileReader
3、读取文件 write( 字符数组，0，长度)+flush( )
4、关闭
public class Writers { public static void main(String[] args) { //1、创建源 File file = new File("F:/test/1.txt"); //2、选择流 Writer writer = null; try { writer = new FileWriter(file); //写出 String str = "I love you!"; writer.write(str); //强制写出 writer.flush(); } catch (IOException e) { e.printStackTrace(); }finally { if (null!=writer) { try { writer.close(); } catch (IOException e) { e.printStackTrace(); } } } }} 三、纯文本的拷贝
综合以上一、二
/** * 仅限字符的纯文本 * * @author * @date 2018/5/29 20:46 */public class CopyText { public static void main(String[] args) { //1、创建连接 File src = new File("F:/test/1.txt"); File des = new File("F:/test/p/100.txt"); //选择流 Reader reader = null; Writer writer = null; try { reader = new FileReader(src); writer= new FileWriter(des); char[] flu = new char[1024]; int len = 0; //持续读取、写入 while (-1!=(len = reader.read(flu))){ writer.write(flu,0,len); } writer.flush();//强制刷出 } catch (IOException e) { e.printStackTrace(); } finally { //关闭 try { if(null!=writer){ writer.close(); } if (null!=reader){ reader.close(); } } catch (IOException e) { e.printStackTrace(); } } }}