将两个文件合并到第三个文件中的 Java 程序
以下是将两个文件合并到第三个文件中的 Java 程序 −
示例
import java.io.*;
public class Demo {
public static void main(String[] args) throws IOException {
PrintWriter my_pw = new PrintWriter("path to third .txt file");
BufferedReader my_br = new BufferedReader(new FileReader("path to first .txt file"));
String my_line = my_br.readLine();
while (my_line != null) {
my_pw.println(my_line);
my_line = my_br.readLine();
}
my_br = new BufferedReader(new FileReader("path to second .txt file"));
my_line = my_br.readLine();
while(my_line != null) {
my_pw.println(my_line);
my_line = my_br.readLine();
}
my_pw.flush();
my_br.close();
my_pw.close();
System.out.println("The first two files have been merged into the third file successfully.");
}
}输出
The first two files have been merged into the third file successfully.
一个名为 Demo 的类包含主函数。在这里生成了 PrintWriter 类和 BufferedReader 的一个实例。依次读取两个文件中每一行内容,直到到达 null。然后将内容添加到第三个文件,并刷新和关闭类实例。
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