JAVA流操作(3)对象流

亦凉 2022-07-31 15:18 182阅读 0赞

//将日期对象和向量对象写入文件，然后从文件中读出并输出到屏幕上，

package objstream;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutputStream;
    import java.util.Date;
    import java.util.Vector;
    import java.util.logging.Level;
    import java.util.logging.Logger;
    import javafx.scene.chart.PieChart.Data;
    
    /**
     *
     * @author Administrator
     */
    public class ObjStream {
    
        /**
         * @param args the command line arguments
         */
        public static void main(String[] args) throws IOException {
            try {
                //这2句与FileOutputStream fout = new FileOutputStream("test.txt");
                //是等价的
                FileOutputStream fout = null;
                
                File f = new File("test.txt");
                
                Vector v = new Vector();   //Vector变量
                v.add("不求有功");
                v.add("才华出众");
                v.add("瞬息万变");
                
                fout = new FileOutputStream(f);
                ObjectOutputStream Obj = new ObjectOutputStream(fout);
                Object Oj = new Object();
                Oj = new Date();
                Obj.writeObject(Oj);
                Obj.writeObject(v);
                Obj.close();
                
                FileInputStream Fin = new FileInputStream(f);
                ObjectInputStream Ois = new ObjectInputStream(Fin);
                
                Object Oji = new Object();     //这里为什么要用2个OBJECT来输出求指教
                Oji = Ois.readObject();       //不用2个的话只输出时间
                System.out.println(Oji);
                Object Oji2 = new Object();
                Oji2 = Ois.readObject();
                System.out.println(Oji2);            
    
            } catch (FileNotFoundException ex) {
                Logger.getLogger(ObjStream.class.getName()).log(Level.SEVERE, null, ex);
            } catch (ClassNotFoundException ex) {
                Logger.getLogger(ObjStream.class.getName()).log(Level.SEVERE, null, ex);
            } 
        }}

对象输入流)可读取使用对象输出流写入的原始数据和类型，与文件输入输出流一起可以实现对象的持久性存储。

结果：

Fri Jul 24 11:28:01 CST 2015  
\[不求有功, 才华出众, 瞬息万变\]  
成功构建 (总时间: 2 秒)

但是test.txt文件里是乱码~~怎么破??