Question

Java 如何将数据追加写入到文件

Answer 1

import java.io.*;String path=request.getRealPath("/example/filetest"); RandomAccessFile rf=new RandomAccessFile(path + "\\WriteData.txt","rw"); //定义一个类RandomAccessFile的对象，并实例化 rf.seek(rf.length());//将指针移动到文件末尾 rf.writeBytes("\nAppend a line to the file!"); rf.close();//关闭文件流 out.println("写入文件内容为：<br>"); FileReader fr=new FileReader(path + "\\WriteData.txt"); BufferedReader br=new BufferedReader(fr);//读取文件的BufferedRead对象 String Line=br.readLine(); while(Line!=null){ out.println(Line + "<br>"); Line=br.readLine(); } fr.close();//关闭文件