java文件写入

读写文件

PrintWriter pw = new PrintWriter("PrintWriter.txt");
pw.write("test");
pw.close();
//BufferedReader 按行读取
BufferedReader reader = new BufferedReader(new FileReader("PrintWriter.txt"));
System.out.println(reader.readLine());
reader.close();

写入文件的另外几种方式

 FileWriter fw = new FileWriter(FileName);
 BufferedWriter writer = new BufferedWriter(fw);

OutputStream output = new FileOutputStream(FileName);
ObjectOutputStream os = new ObjectOutputStream(output);
os.writeObject(object);

OutputStream output = new OutputStreamWriter(FILE);

PrintWriter pw = new PrintWriter(FileName);

一般用最新的方法读写，更快更方便。