如何在java中向现有文本文件添加新行？

Question

我用过bw。换行符和“n/n”，但当有新的输入时，似乎没有任何东西将这些行分开

try
{       
    FileWriter filewriter = new FileWriter("transactions",true);
    BufferedWriter bw = new BufferedWriter(filewriter);
    bw.newLine();
    bw.write("Withdrawn"+ " "+withdraw+ "\r\n"+ "Balance" + " "+initialamount.get(Wd)+"\r\n"+
            " "+ date);

    bw.close();

}
catch ( IOException e)
{

}

Answer 1

我会使用打印流：

try(PrintStream printStream = new PrintStream("transactions"))
{       
    printStream.println();
    printStream.println("Withdrawn " + withdraw);
    printStream.println("Balance " + initialamount.get(Wd));
    printStream.println(date);
}
catch ( IOException e)
{
    //You should do something here
}

Answer 2

如果您想要遵循相同类型的结构，并使用FileWriter和BufferedWriter，那么您将需要以下内容：

try
{
    FileWriter filewriter = new FileWriter("src/resources/test.txt",true);
    BufferedWriter bw = new BufferedWriter(filewriter);
    bw.write("Withdrawn: " + withdraw +"\n");
    bw.write("Balance: " +initialamount.get( Wd ) + date );
    bw.newLine();
    bw.close();
}
catch ( IOException ignored )
{

}