追加文本到文件末尾 [英] append text to the end of the file

问题描述

我是使用下面的code段写入文本到最终o分别被调用时，该文件。但是，它被擦除的旧数据，然后将新数据写入到文件的开头。如何解决以下code，使其追加新数据的总是文件的末尾？

 公共布尔将writeToFile（字符串目录下，文件名字符串，字符串数据）{
    文件的;
    OutputStreamWriter outStreamWriter = NULL;
    FileOutputStream中outStream = NULL;    出=新的文件（新建文件（目录），文件名）;    如果（out.exists（）==假）{
                out.createNewFile（）;
    }    outStream =新的FileOutputStream（出）;
    outStreamWriter =新OutputStreamWriter（outStream）;    outStreamWriter.append（数据）;
    outStreamWriter.flush（）;
   }
 

解决方案

尝试设置追加布尔值为true在的FileOutputStream ：

  outStream =新的FileOutputStream（满分，真）;
outStreamWriter =新OutputStreamWriter（outStream）;
 

I am using the below code segment to write text to the end o the file for each time it is called. But, it is erasing the old data and then writes the new data to the beginning of the file. How can I fix the below code so that it is append new data always end of the file ?

public boolean writeToFile(String directory, String filename, String data ){
    File out;
    OutputStreamWriter outStreamWriter = null;
    FileOutputStream outStream = null;

    out = new File(new File(directory), filename);

    if ( out.exists() == false ){
                out.createNewFile();
    }

    outStream = new FileOutputStream(out) ;
    outStreamWriter = new OutputStreamWriter(outStream); 

    outStreamWriter.append(data);
    outStreamWriter.flush();
   }        

解决方案

Try to set append boolean value to true in FileOutputStream:

outStream = new FileOutputStream(out, true);
outStreamWriter = new OutputStreamWriter(outStream); 

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