在读取文件中对象时遇到java.io.EOFException异常
import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.util.ArrayList;public class ReadFromFile { public static ArrayList<Student> readFromFile() { ObjectInputStream ois = null; File f = new File (“d:\\student.txt”); ArrayList<Student> st = new ArrayList<Student> ( ); try { FileInputStream fis = new FileInputStream (f); //文件不存在创建文件 if (!f.exists ( )) { f.createNewFile ( ); } ois = new ObjectInputStream (fis); Student[] students = (Student[]) ois.readObject ( ); for (Student s : students ) { // System.out.println (s ); st.add (s); } } catch (IOException | ClassNotFoundException e) { e.printStackTrace ( ); } finally { if (null != ois) { try { ois.close ( ); } catch (IOException e) { e.printStackTrace ( ); } } } return st; }}
异常原因：因文件为空，输入流未读取到任何数据
解决方法：加判断条件，如果文件大小为0 则不读取文件内容，增加代码如下：
if (f.length ( ) == 0) { fis.close (); return st; } else { ois = new ObjectInputStream (fis); }