java读/写文件

读取文件参考：https://blog.csdn.net/weixin_42129373/article/details/82154471

写入文件参考：https://blog.csdn.net/BanketBoy/article/details/86504704

https://www.cnblogs.com/chenpi/p/5498731.html

 1 package text;
 2
 3 import java.io.BufferedReader;
 4 import java.io.BufferedWriter;
 5 import java.io.File;
 6 import java.io.FileNotFoundException;
 7 import java.io.FileReader;
 8 import java.io.FileWriter;
 9 import java.io.IOException;
10 import java.util.Arrays;
11 import java.util.Scanner;
12
13 import javax.annotation.processing.FilerException;
14 /*从input1.txt和input.txt文本文档轮流按行读取数据并按行写入output.txt文本文档
15  */
16
17 public class Main {
18     public static void main(String[] args) {
19         String aString = "E:\\ACM\\test\\input1.txt";//文件的路径
20         String bString = "E:\\ACM\\test\\input.txt";
21         String cString = "E:\\ACM\\test\\output.txt";
22
23         try {
24             FileReader aFileReader = new FileReader(aString);//字符流用于读/写文件
25             FileReader bFileReader = new FileReader(bString);
26             FileWriter cFileWriter = new FileWriter(cString);//如果写入第二参数为true，则为追加写入
27
28             BufferedReader aBufferedReader = new BufferedReader(aFileReader);//包装字符流以提高效率
29             BufferedReader bBufferedReader = new BufferedReader(bFileReader);
30             BufferedWriter cBufferedWriter = new BufferedWriter(cFileWriter);
31
32             String tempString = aBufferedReader.readLine();//按行读取
33             while (tempString != null) {
34                 cBufferedWriter.write(tempString);
35                 cBufferedWriter.newLine();//写入换行
36
37                 tempString = bBufferedReader.readLine();
38                 cBufferedWriter.write(tempString);
39                 cBufferedWriter.newLine();
40
41                 tempString = aBufferedReader.readLine();
42             }
43
44             cBufferedWriter.close();//关闭流
45             aBufferedReader.close();
46             bBufferedReader.close();
47             aFileReader.close();
48             bFileReader.close();
49             cFileWriter.close();
50         } catch (FileNotFoundException e) {//没有try-catch会报错
51             e.printStackTrace();
52         } catch (IOException e) {
53             e.printStackTrace();
54         }
55     }
56 }

原文地址：https://www.cnblogs.com/hemeiwolong/p/12332332.html