Java图书管理系统（swing+jdbc+mysql）主界面+添加+查询+修改+删除功能实现

最基本的增删改查功能的实现

因为这几个功能的实现不难，所有就Po个图，还有函数的实现，以及Button的监听事件处理。图书类别、图书都会实现这增删改查功能所以就放其中一个的吧。

UI

图书类别实体

private int id;
	private String bookTypeName;
	private String bookTypeDesc;

字符串工具类

/**
 * 字符串工具类
 * @author Amos0602
 *
 */
public class StringUtil {
	public static boolean isEmpty(String string) {
		if (string==null||"".equals(string.trim())) {
			return true;
		}else {
			return false;
		}
	}
	public static boolean isNotEmpty(String string) {
		if (string!=null && !"".equals(string.trim())) {
			return true;	
		} else {
			return false;
		}
	}
}

Dao层代码

/**
 * 图书类别Dao类
 * @author Amos0602
 *
 */
public class BookTypeDao {
	/**
	 * 图书类别增加
	 * @param connection
	 * @param bookType
	 * @return
	 * @throws Exception
	 */
	public int add(Connection connection,BookType bookType)throws Exception {
		String sql="insert into t_bookType values(null,?,?)";
		PreparedStatement pstmt=connection.prepareStatement(sql);
		pstmt.setString(1, bookType.getBookTypeName());
		pstmt.setString(2, bookType.getBookTypeDesc());
		return pstmt.executeUpdate();
	}
	/**
	 * 删除图书类别
	 * @param connection
	 * @param id
	 * @return
	 * @throws Exception
	 */
	public int delete(Connection connection,String id)throws Exception {
		String sql="delete from t_booktype where id=?";
		PreparedStatement pstmt=connection.prepareStatement(sql);
		pstmt.setString(1, id);
		return pstmt.executeUpdate();
	}
	/**
	 * 更新图书类别
	 * @param connection
	 * @param bookType
	 * @return
	 * @throws Exception
	 */
	public int update(Connection connection,BookType bookType)throws Exception{
		String sql="update t_booktype set bookTypeName=?,bookTypeDesc=? where id=?";
		PreparedStatement pstmt=connection.prepareStatement(sql);
		pstmt.setString(1, bookType.getBookTypeName());
		pstmt.setString(2, bookType.getBookTypeDesc());
		pstmt.setInt(3, bookType.getId());
		return pstmt.executeUpdate();
	}
	/**
	 * 查询图书类别集合
	 * @param connection
	 * @param bookType
	 * @return
	 * @throws Exception
	 */
	public ResultSet list(Connection connection,BookType bookType) throws Exception{
		StringBuffer sBuffer=new StringBuffer("select * from t_booktype");
		if (StringUtil.isNotEmpty(bookType.getBookTypeName())) {
			sBuffer.append(" and bookTypeName like '%"+bookType.getBookTypeName()+"%'");			
		}
		PreparedStatement pstmt=connection.prepareStatement(sBuffer.toString().replaceFirst("and", "where"));
		return pstmt.executeQuery();
	}
}

事件处理

/**
	 * 图书类型添加事件
	 * @param e
	 */
	private void bookTypeAddActionPerformed(ActionEvent e) {
		String bookTypeName=this.bookTypeNameTxt.getText();
		String bookTypeDesc=this.bookTypeDescTxt.getText();
		if (StringUtil.isEmpty(bookTypeName)) {
			JOptionPane.showMessageDialog(null, "图书类别名称不能为空!");
			return;
		}
		BookType bookType=new BookType(bookTypeName,bookTypeDesc);
		Connection connection=null;
		try {
			connection=dbUtil.getConnection();
			int n=bookTypeDao.add(connection, bookType);
			if (n==1) {
				JOptionPane.showMessageDialog(null, "图书类别添加成功!");
				resetValue();
			}else {
				JOptionPane.showMessageDialog(null, "图书类别添加失败!");
			}
		} catch (Exception e2) {
			e2.printStackTrace();
			JOptionPane.showMessageDialog(null, "图书类别添加失败!");
		}finally {
			try {
				dbUtil.closeConnection(connection);
			} catch (Exception e3) {
				
			}
		}
	}

/**
	 * 图书类别删除事件处理
	 * @param arg0
	 */
	private void bookTypeDeleteActionEvent(ActionEvent arg0) {
		String id=idTxt.getText();
		if (StringUtil.isEmpty(id)) {
			JOptionPane.showMessageDialog(null, "请选择要删除的记录");
			return;
		}
		int n=JOptionPane.showConfirmDialog(null, "确定要删除该记录吗？");
		if (n==0) {
			Connection connection=null;
			try {
				connection=dbUtil.getConnection();
				int deleteNum=bookTypeDao.delete(connection, id);
				if (deleteNum==1) {
					JOptionPane.showMessageDialog(null, "删除成功!");
					this.resetValue();
					this.fillTable(new BookType());
				}else {
					JOptionPane.showMessageDialog(null, "删除失败!");
				}
			} catch (Exception e) {
				e.printStackTrace();
				JOptionPane.showMessageDialog(null, "删除失败!");
			}finally {
				try {
					dbUtil.closeConnection(connection);
				} catch (Exception e) {
					// TODO 自动生成的 catch 块
					e.printStackTrace();
				}
			}
		}
	}

/**
	 * 修改图书类别事件处理
	 * @param arg0
	 */
	private void bookTypeUpdateActionEvent(ActionEvent arg0) {
		String id=idTxt.getText();
		String bookTypeName=bookTypeNameTxt.getText();
		String bookTypeDesc=bookTypeDescTxt.getText();
		if (StringUtil.isEmpty(id)) {
			JOptionPane.showMessageDialog(null, "请选择要修改的记录");
			return;
		}
		if (StringUtil.isEmpty(bookTypeName)) {
			JOptionPane.showMessageDialog(null, "图书类别名称不能为空");
			return;
		}
		BookType bookType=new BookType(Integer.parseInt(id),bookTypeName,bookTypeDesc);
		Connection connection=null;
		try {
			connection=dbUtil.getConnection();
			int modifyNum=bookTypeDao.update(connection, bookType);
			if (modifyNum==1) {
				JOptionPane.showMessageDialog(null, "修改成功！");
				this.resetValue();
				this.fillTable(new BookType());
			}else {
				JOptionPane.showMessageDialog(null, "修改失败！");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				dbUtil.closeConnection(connection);
			} catch (Exception e) {
				// TODO 自动生成的 catch 块
				e.printStackTrace();
			}
		}
	}

/**
	 * 图书类别查询事件处理
	 * @param arg0
	 */
	private void bookTypeSeachActionPerFormed(ActionEvent evt) {
		String s_bookTypeName=this.s_bookTypeNameTxt.getText();
		BookType bookType=new BookType();
		bookType.setBookTypeName(s_bookTypeName);
		this.fillTable(bookType);
		
	}

这里还涉及到在修改删除模块中，单机显示的Table行，在文本域里显示信息，下面是点击行事件处理

/**
	 * 表格行点击事件处理
	 * @param arg0
	 */
	private void bookTypeTableMousePressed(MouseEvent arg0) {
		int row=bookTypeTable.getSelectedRow();
		idTxt.setText((String)bookTypeTable.getValueAt(row, 0));
		bookTypeNameTxt.setText((String)bookTypeTable.getValueAt(row, 1));
		bookTypeDescTxt.setText((String)bookTypeTable.getValueAt(row, 2));
		
	}

重置功能

重置表单封装了一下，后面方便使用

/**
	 * 重置事件处理
	 * @param arg0
	 */
	private void resetValueActionPerformed(ActionEvent arg0) {
		this.resetValue();//已封装，往下
	}

/*
	 * 重置表单
	 */
	private void resetValue() {
		this.bookTypeDescTxt.setText("");
		this.bookTypeNameTxt.setText("");
	}

到这里就撒花了。

后面的图书的管理，跟图书类别管理一样的增删改查…