Question

若存在将两个文本文件“1.txt”和“2.txt”的内容读入并写在一个“3.txt”文件中

用java语言编写

Answer 1

JAVA的问题干嘛发C/C++这边额 = =
-----------------------华丽的分割线-----------------------------
File srcFile1 = new File("1.txt");
File srcFile2 = new File("2.txt");
File destFile = new File("3.txt");

if (destFile.exists()) {
destFile.delete();
destFile.createNewFile();
} // 如果不希望覆盖原文件，就不要上面这步

FileInputStream in = null;
FileOutputStream out = null;
try {
out = new FileOutputStream(destFile);
int byteRead = 0;
byte[] buffer = new byte[100]; //这里的100是每次读多大的数据，随便定

in = new FileInputStream(srcFile1);
while ((byteRead = in.read(buffer)) != -1) {
out.write(buffer, 0, byteRead);
}
in.close();

in = new FileInputStream(srcFile2);
while ((byteRead = in.read(buffer)) != -1) {
out.write(buffer, 0, byteRead);
}

out.flush();
} catch (IOException e) {
e.printStachTrace();
} finally {
if (in != null) {
in.close();
in = null;
}

if (out != null) {
out.close();
out = null;
}
}