学习java三个月了，先前做了ERP系统，现在准备做图书管理系统谁给我点提示？？
我没学数据库 只学了文件流
------解决方案--------------------
我找的一个程序，楼主看看
//还书信息查询
- Java code
import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.sql.*;public class ReturnInfo extends JFrame implements ActionListener{ DataBaseManager db=new DataBaseManager(); ResultSet rs; JPanel panel1,panel2; Container c; JLabel TipLabel=new JLabel("输入还书者姓名和书名点击确定，将调出此书的相关信息"); JLabel ReturnedBookStudentLabel,ReturnedBookNameLabel, ReturnedDateLabel,ReturnedCommentLabel; JTextField ReturnedBookStudentTextField,ReturnedBookNameTextField, ReturnedDateTextField,ReturnedCommentTextField; JButton ClearBtn,YesBtn,UpdateBtn,CancelBtn; public ReturnInfo() { super("修改书籍还入信息"); c=getContentPane(); c.setLayout(new BorderLayout()); c.add(TipLabel,BorderLayout.NORTH); ReturnedBookStudentLabel=new JLabel("还书者姓名",JLabel.CENTER); ReturnedBookNameLabel=new JLabel("书名",JLabel.CENTER); ReturnedDateLabel=new JLabel("还书日期",JLabel.CENTER); ReturnedCommentLabel=new JLabel("备注",JLabel.CENTER); ReturnedBookStudentTextField=new JTextField(15); ReturnedBookNameTextField=new JTextField(15); ReturnedDateTextField=new JTextField(15); ReturnedCommentTextField=new JTextField(15); panel1=new JPanel(); panel1.setLayout(new GridLayout(4,2)); panel1.add(ReturnedBookStudentLabel); panel1.add(ReturnedBookStudentTextField); panel1.add(ReturnedBookNameLabel); panel1.add(ReturnedBookNameTextField); panel1.add(ReturnedDateLabel); panel1.add(ReturnedDateTextField); panel1.add(ReturnedCommentLabel); panel1.add(ReturnedCommentTextField); c.add(panel1,BorderLayout.CENTER); panel2=new JPanel(); panel2.setLayout(new GridLayout(1,4)); ClearBtn=new JButton("清空"); YesBtn=new JButton("确定"); UpdateBtn=new JButton("更新"); CancelBtn=new JButton("取消"); ClearBtn.addActionListener(this); YesBtn.addActionListener(this); UpdateBtn.addActionListener(this); UpdateBtn.setEnabled(false); CancelBtn.addActionListener(this); panel2.add(ClearBtn); panel2.add(YesBtn); panel2.add(UpdateBtn); panel2.add(CancelBtn); c.add(panel2,BorderLayout.SOUTH); } public void actionPerformed(ActionEvent e) { if(e.getSource()==ClearBtn) { ReturnedBookStudentTextField.setText(""); ReturnedBookNameTextField.setText(""); ReturnedDateTextField.setText(""); ReturnedCommentTextField.setText(""); } else if(e.getSource()==CancelBtn) { this.dispose(); } else if(e.getSource()==YesBtn) { try { String strSQL="select studentName,bookName,borrowDate,comment from BookBrowse where studentName='"+ ReturnedBookStudentTextField.getText().trim()+"'"; rs=db.getResult(strSQL); if(!rs.first()) { JOptionPane.showMessageDialog(null,"此学生没有借过书！或者没有此书！"); } else { ReturnedBookStudentTextField.setText(rs.getString(1)); ReturnedBookNameTextField.setText(rs.getString(2)); ReturnedDateTextField.setText(rs.getString(3)); ReturnedCommentTextField.setText(rs.getString(4)); UpdateBtn.setEnabled(true); } } catch(Exception ex) { System.out.println(ex.toString()); } } else if(e.getSource()==UpdateBtn) { String strSQL="update bookBrowse set returnDate='"+ ReturnedDateTextField.getText().trim()+"',comment='"+ ReturnedCommentTextField.getText().trim()+"' where studentName='"+ ReturnedBookStudentTextField.getText().trim()+"'and bookName='"+ ReturnedBookNameTextField.getText().trim()+"'"; if(db.updateSql(strSQL)) { JOptionPane.showMessageDialog(null,"更新成功！"); db.closeConnection(); this.dispose(); } else { JOptionPane.showMessageDialog(null,"更新失败！"); db.closeConnection(); this.dispose(); } } }}