FileWriter追加文本内容

package com.huawei.autofact.business;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;

public class FileWriterDemo {

void writeMyFile() {
  try {
             //追加
   FileWriter fw = new FileWriter("mydata.txt",true);
   PrintWriter out = new PrintWriter(fw);
   out.println("你好!");
   out.close();
   fw.close();
  } catch (IOException e) {
   e.printStackTrace();
  }
}

public static void main(String[] args) {
  FileWriterDemo test = new FileWriterDemo();
  test.writeMyFile();
}
}