From b527bd4e997dc3cb46c88a25855a5c9b1feddea7 Mon Sep 17 00:00:00 2001
From: nxist2202005014 <1463859337@qq.com>
Date: Wed, 26 Jun 2024 09:49:00 +0800
Subject: [PATCH] ADD file via upload

---
 OrderDaoImpl.java | 151 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 OrderDaoImpl.java

diff --git a/OrderDaoImpl.java b/OrderDaoImpl.java
new file mode 100644
index 0000000..225b175
--- /dev/null
+++ b/OrderDaoImpl.java
@@ -0,0 +1,151 @@
+package flowershop.daoimpl;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+import flowershop.dao.OrderDao;
+import flowershop.model.Order;
+
+public class OrderDaoImpl implements OrderDao {
+
+	@Override
+	public List<Order> findAll() {
+		//方法用于查询所有订单信息，执行了一个SQL查询语句，将查询结果封装为Order对象列表并返回。
+				String sql = "select orderid,userid,orderdate from order";
+				List<Order> list = new ArrayList<Order>();
+				try (// 2.创建数据库连接
+						Connection conn = Jdbc.getConnection();
+						// 3.创建语句对象
+						PreparedStatement pstmt = conn.prepareStatement(sql);
+						// 4.绑定参数
+						// 5.执行查询
+						ResultSet rs = pstmt.executeQuery()) {
+					// 6.遍历结果集
+					while (rs.next()) {
+						Order order = new Order();
+						order.setOrderid(rs.getLong("orderid"));
+						order.setOrderdate(rs.getDate("orderdate"));
+						order.setUserid(rs.getString("userid"));
+						list.add(order);
+					}
+				} catch (SQLException e) {
+					// TODO 自动生成的 catch 块
+					e.printStackTrace();
+				}
+				return list;
+	}
+
+	
+	@Override
+	public Order findById(String id) {
+		//方法根据订单ID查询特定订单信息，执行了一个带参数的SQL查询语句，
+		//将查询结果封装为Orderwjx对象并返回。在方法结束时，关闭了数据库连接。	
+				Connection conn = null;
+				PreparedStatement pstmt = null;
+				ResultSet rs = null;			
+				try {
+					// 2.创建数据库连接
+					conn = Jdbc.getConnection(); //1.加载驱动程序
+					String sql = "select orderid,userid,orderdate,status,amount from order where orderid = ?";
+					// 3.创建语句对象
+					pstmt = conn.prepareStatement(sql);
+					// 4.绑定参数
+					pstmt.setString(1, id);
+					// 5.执行查询
+					rs = pstmt.executeQuery();
+					// 6.遍历结果集
+					if (rs.next()) {
+						Order order = new Order();						
+						order.setOrderid(rs.getLong("orderid"));
+						order.setUserid(rs.getString("userid"));
+						order.setOrderdate(rs.getDate("orderdate"));					
+						return order;
+					}					
+				} catch (SQLException e) {
+					e.printStackTrace();
+				} finally {
+					Jdbc.close(rs, pstmt, conn);
+				}
+				return null;
+	}
+
+	
+	@Override
+	public int create(Order order) {
+		//方法用于插入新的订单信息，执行了一个带参数的SQL插入语句，并打印出成功插入的数据条数。
+				String sql = "insert into order(orderid,userid,orderdate,status,amount) values(?,?,?,?,?)";
+				try (// 2.创建数据库连接
+						Connection conn = Jdbc.getConnection();
+						// 3.创建语句对象
+						PreparedStatement pstmt = conn.prepareStatement(sql);) {
+					// 4.绑定参数
+					pstmt.setLong(1, order.getOrderid());
+					pstmt.setString(2, order.getUserid());
+					// utilDate转化为sql date
+					java.util.Date date = order.getOrderdate();
+					// java.sql.Date date = new java.sql.Date(now.getTime());
+					// Timestamp比Date更准确
+					pstmt.setDate(3, new java.sql.Date(date.getTime()));
+					pstmt.setTimestamp(3, new java.sql.Timestamp(date.getTime()));
+					pstmt.setInt(4, order.getStatus());
+					pstmt.setDouble(5, order.getAmount());
+					// 5.执行
+					int affectedRows = pstmt.executeUpdate();
+					System.out.printf("成功插入%d数据.\n", affectedRows);
+				} catch (SQLException e) {
+					// TODO 自动生成的 catch 块
+					return -1;
+
+				}
+				return 0;
+	}
+
+	
+	@Override
+	public int modify(Order order) {
+		//根据订单ID更新订单金额。
+		String sql = "update order set amount = ? where orderid = ?";				
+				try ( // 2.创建数据库连接
+						Connection conn = Jdbc.getConnection();
+						// 3. 创建语句对象
+						PreparedStatement pstmt= conn.prepareStatement(sql)
+						) {
+						// 4. 绑定参数					
+						pstmt.setDouble(1, order.getAmount());
+						pstmt.setLong(2, order.getOrderid());
+						// 5. 执行修改（C、U、D）
+						int affectedRows = pstmt.executeUpdate();
+						System.out.printf("成功更新%d条数据。\n", affectedRows);
+					} catch (SQLException e) {
+						e.printStackTrace();
+					}
+				return 0;
+	}
+
+	
+	@Override
+	public int remove(Order order) {
+		//removewjx(Orderwjx orderwjx)方法用于删除订单信息，执行了一个带参数的SQL删除语句
+		//并打印出成功删除的数据条数。
+				String sql = "delete from order where orderid = ?";
+				try ( // 2.创建数据库连接
+						Connection conn = Jdbc.getConnection();
+						// 3. 创建语句对象
+						PreparedStatement pstmt = conn.prepareStatement(sql)) {
+						// 4. 绑定参数
+						pstmt.setLong(1, order.getOrderid());
+						// 5. 执行修改（C、U、D）
+						int affectedRows = pstmt.executeUpdate();
+						System.out.printf("成功删除%d条数据。\n", affectedRows);
+					} catch (SQLException e) {
+						e.printStackTrace();
+					}
+				return 0;
+			}
+		}
+//try-with-resources语句，确保了在方法结束时数据库连接、语句对象和结果集会被正确关闭，从而避免了资源泄露问题。
+