使用java写入多个文件 [英] Write to multiple files with java

问题描述

创建文件file1.txt和file2.txt但不写Java is object oriented的代码需要创建多个文件并写入字符串

包Io; 
 
 import java.io.BufferedWriter; 
 import java.io.FileWriter; 
 import java.io.IOException; 
 import java.io.BufferedWriter; 
 import java.io.File; 
 import java.io.FileOutputStream; 
 import java.io.FileWriter; 
 import java.io.IOException; 
 import java.io.OutputStream; 
 import java.nio.file.Files; 
 import java.nio.file.Paths; 
 import java.util.logging.Level; 
 import java.util.logging.Logger; 
 
 
公共类FilesWriter 
 {
 
 private static final String FILENAME =D：/myfile.html; 
 
 public static void main（String [] args）throws IOException 
 {
 
 String [] fileNames = {file1.html，file2.txt }; 
 BufferedWriter writer = null; 
 for（int i = 0; i< fileNames.length; i ++）
 {
 writer = new BufferedWriter（new FileWriter（fileNames [i]））; 
 writer.write（Java是面向对象的）; 
} 
} 
} 

filename forc [] = [filename1，filename2，filename3， filename4，filename5，..]



for（y = 0; y< forc.length; y ++;）

{

writer.write（Java是面向对象的）;

}



是否有可能forc []读取从文件中文件的名称例如来自文件中有四十个文件名



是否可以为文件数量创建for循环说例如



我尝试了什么：



更改了代码并添加了printwriter和filewriter

解决方案

你必须刷新 BufferedWriter ，例如

< pre lang =Java> public static void main（ String [] args） throws IO例外
{
字符串 [] fileNames = { file1.html， file2.txt};
BufferedWriter writer = null;
for （ int i = 0; i< fileNames.length; i ++）
{
System.out.printf（ ％d \ n，i） ;
writer = new BufferedWriter（ new FileWriter（fileNames [i]））;
writer.write（ Java是面向对象的）;
writer.close（）; // < - 刷新BufferedWriter
}

code that creates files file1.txt and file2.txt but doesn't write "Java is object oriented" would want create multiple files and write string

package Io;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.logging.Level;
import java.util.logging.Logger;


public class FilesWriter 
{
    
        private static final String FILENAME = "D:/myfile.html"; 
        
	public static void main(String[] args) throws IOException 
        {                                   
            
        String[] fileNames = {"file1.html","file2.txt"};    
        BufferedWriter writer = null;
        for(int i=0;i<fileNames.length;i++)
            {
            writer = new BufferedWriter(new FileWriter(fileNames[i]));            
            writer.write("Java is object oriented");
            }		
	}    
} 

filename forc[] = [filename1, filename2, filename3, filename4, filename5,..]

for(y = 0; y<forc.length; y++;)
{
writer.write("Java is object oriented");
}

is it possible that forc[] reads from file the names of files say for instance from file that has forty filenames

is it possible to create for loop for number of files say for instance

What I have tried:

changed code and added printwriter and filewriter

解决方案

You have to flush the BufferedWriter, e.g.

public static void main(String[] args) throws IOException
{
  String[] fileNames = {"file1.html","file2.txt"};
  BufferedWriter writer = null;
  for(int i=0;i<fileNames.length;i++)
  {
    System.out.printf("%d\n", i);
    writer = new BufferedWriter(new FileWriter(fileNames[i]));
    writer.write("Java is object oriented");
    writer.close(); //<- flush the BufferedWriter
  }

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