Question

这是我的代码：

import java.io.File;    
import java.io.FileWriter;    
import java.io.BufferedWriter;    
import java.io.IOException;    

public class Append    
{    
    public static void main( String[] args )    
    {       
        try{    
            String data = " Thank you very much";    

            File file =new File(" ");    

            //if file doesnt exists, then create it    
            if(!file.exists()){    
                file.createNewFile();    
                System.out.println("New File Created Now");    
            }    

            //true = append file    
                FileWriter fileWritter = new FileWriter(file.getName(),true);        
                BufferedWriter bufferWritter = new BufferedWriter(fileWritter);            
                bufferWritter.write(data);    
                bufferWritter.close();    

            System.out.println("Done");    

        }catch(IOException e){    
            e.printStackTrace();    
        }    
    }    
}

在上面的代码中我试图添加＆＃34; String data =＆＃34;非常感谢你＆＃34 ;; ＆＃34;在G：//Openone.txt，但它没有正确，我没有得到输出。

Answer 1

public static void main( String[] args )    
{       
    try{    
        String data = " Thank you very much";    

        File file =new File(" ");    

        //if file doesnt exists, then create it    
        if(!file.exists()){    
            file.createNewFile();    
            System.out.println("New File Created Now");    
        }    

        //true = append file    
            FileWriter fileWritter = new FileWriter(file,true);        
            BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
            bufferWritter.write(data);
            bufferWritter.close();
            fileWritter.close();

        System.out.println("Done");    

    }catch(Exception e){    
        e.printStackTrace();    
    }    
}

在以下行中使用文件对象而不是file.getName()。

FileWriter fileWritter = new FileWriter(file.getName(),true);

Answer 2

        File file =new File(" ");

应该成为

        File file = new File("G:\\Openone.txt");

Answer 3

如果您使用的是Java 7+，则可以使用：

Files.write(Paths.get("G:\\Openone.txt"), "Thank you very much".getBytes(), StandardOpenOption.APPEND, StandardOpenOption.CREATE);

顺便说一下，我建议你重构代码，以便使用finally块正确管理异常，因为如果在写行中抛出异常，则不会调用close方法。

我想在使用Java的Last Line of File中添加一些字符串，但是我遇到了困难，需要帮助:)

3 个答案: