本文介绍了 Java 中使用不同类型的 IO 流进行文件读写的方法。包括 DataInputStream 和 DataOutputStream 处理基本数据类型，BufferedInputStream 与 BufferedOutputStream 提升读写效率，以及使用字符流如 BufferedReader 和 BufferedWriter 进行文本文件的读写操作。
java io流：几种常见的io类组合方式
try {
DataOutputStream out =
new DataOutputStream(
new BufferedOutputStream(
new FileOutputStream("Data.txt")));
out.writeDouble(3.14159);
out.close();
DataInputStream in =
new DataInputStream(
new BufferedInputStream(
new FileInputStream("Data.txt")));
System.out.println(in.readDouble());
in.close();
} catch(Exception e) {
System.out.println("fail");
}
byte[] buffer = new byte[255];
try {
BufferedOutputStream bos = new BufferedOutputStream(
new FileOutputStream(new File("file.txt")));
BufferedInputStream bis = new BufferedInputStream(
new FileInputStream(new File("E:/Test/io/t.txt")));
int length;
length = bis.read(buffer);
bis.close();
bos.write(buffer,0,length);
bos.close();
}catch(EOFException e) {
System.out.println("fail");
}
char[] buffer = new char[255];
try{
PrintWriter out
= new PrintWriter(new BufferedWriter(new FileWriter("foo.txt")));
BufferedReader in =
new BufferedReader(
new FileReader("E:/Test/io/t.txt"));
int length;
length = in.read(buffer);
System.out.println(length);
in.close();
out.write(buffer, 0, length);
out.close();
}
catch(Exception e) {
System.out.println("fail");
}------------------------------*--------------------------------------
char[] buffer = new char[255];
try{
PrintWriter out
= new PrintWriter(new BufferedWriter(new FileWriter("foo.txt")));
StringReader in = new StringReader("北京龙卷风科技");
int length;
length = in.read(buffer);
in.close();
out.write(buffer,0,length);
out.close();
}
catch(Exception e) {
System.out.println("fail");
}
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
