java对象数组的文件存取

万物接对象所以数组也是一个对象,可以直接写入;

packagecom.java.test;

importjava.io.BufferedInputStream;

importjava.io.BufferedOutputStream;

importjava.io.FileInputStream;

importjava.io.FileOutputStream;

importjava.io.IOException;

importjava.io.ObjectInputStream;

importjava.io.ObjectOutputStream;

importjava.util.ArrayList;

importjava.util.List;

/**

 * 测试向本地文件存储及读取对象数组

 *@authorAdministrator

 * 2015年11月4日16:00:22

 *

 */

publicclassTestListObject {

      /**

       * 建立一个学生对象的数组

       *@paramstu

       *@return

       */

      publicstaticList<Student> listStudents(Studentstu){

            List<Student>lists= new ArrayList<Student>();

            for( int i = 0;i<10;i++) {

                  lists.add(stu);

            }

            return lists;

      }

      /**

       * 将student对象数组写入到文件中,数组也是一个对象,所以可以直接使用对象流存到文件中

       *@paramstus

       */

      publicstaticvoidwriteIntoFile(List<Student>stus){

            ObjectOutputStreamoos;

            try{

                  oos= new ObjectOutputStream( new BufferedOutputStream(newFileOutputStream("F://file.txt")));

                  

                  oos.writeObject(stus);

                  

                  oos.flush();

                  oos.close();      

            }catch(IOExceptione) {

                  //TODOAuto-generated catch block

                  e.printStackTrace();

            }finally{

                  System.out.println("文件写入完成!");

            }

      }

      /**

       * 从文件中读取对象数组,并强制转换对象

       */

      @SuppressWarnings("unchecked")

      publicstaticList<Student> testReader(){

            List<Student>lists= null;

            try{

                  ObjectInputStreamois= new ObjectInputStream( new BufferedInputStream(newFileInputStream("F://file.txt")));

                  lists=(ArrayList<Student>)ois.readObject();

                  ois.close();

            }catch(IOExceptione) {

                  //TODOAuto-generated catch block

                  e.printStackTrace();

            }catch(ClassNotFoundExceptione) {

                  //TODOAuto-generated catch block

                  e.printStackTrace();

            }finally{

                  System.out.println("读取成功!");

            }

            returnlists;

      }

      publicstaticvoidmain(String[]args) {

            Studentstudent= new Student();

            student.setId(99);

            student.setName("maliao");

            student.setScore(899);

            

            //List<Student>stus = listStudents(student);

            //writeIntoFile(stus);

            System.out.println(testReader());

            

      }

}