diff --git a/ticketing-master/src/com/cn/domain/Train.java b/ticketing-master/src/com/cn/domain/Train.java
index d941615..edab664 100644
--- a/ticketing-master/src/com/cn/domain/Train.java
+++ b/ticketing-master/src/com/cn/domain/Train.java
@@ -1,131 +1,160 @@
-package com.cn.domain;
+package com.cn.domain; // 定义类的包名
 
-import java.sql.Timestamp;
+import java.sql.Timestamp; // 导入Timestamp类，用于处理日期和时间
 
 /**
- * 
+ * 车次信息的实体类
  * @ClassName: Train
  * @Description: 车次信息的实体类
  * @author: ljy
  * @date: 2019年9月1日 下午1:23:31
  */
 public class Train {
-
-	private Integer trainId; // 序号
-	private String trainNumber;// 车次
-	private String startStation;// 起始站
-	private String endStation; // 终点站
-	private String startTime; // 开车时间
-	private String endTime; // 到站时间
-	private Integer price; // 车票价格
-	private Integer seatNumber; // 座位数量
-	private Timestamp addTime; // 添加日期
-
-	public Integer getTrainId() {
-		return trainId;
-	}
-
-	public void setTrainId(Integer trainId) {
-		this.trainId = trainId;
-	}
-
-	public String getTrainNumber() {
-		return trainNumber;
-	}
-
-	public void setTrainNumber(String trainNumber) {
-		this.trainNumber = trainNumber;
-	}
-
-	public String getStartStation() {
-		return startStation;
-	}
-
-	public void setStartStation(String startStation) {
-		this.startStation = startStation;
-	}
-
-	public String getEndStation() {
-		return endStation;
-	}
-
-	public void setEndStation(String endStation) {
-		this.endStation = endStation;
-	}
-
-	public String getStartTime() {
-		return startTime;
-	}
-
-	public void setStartTime(String startTime) {
-		this.startTime = startTime;
-	}
-
-	public String getEndTime() {
-		return endTime;
-	}
-
-	public void setEndTime(String endTime) {
-		this.endTime = endTime;
-	}
-
-	public Integer getPrice() {
-		return price;
-	}
-
-	public void setPrice(Integer price) {
-		this.price = price;
-	}
-
-	public Integer getSeatNumber() {
-		return seatNumber;
-	}
-
-	public void setSeatNumber(Integer seatNumber) {
-		this.seatNumber = seatNumber;
-	}
-
-	public Timestamp getAddTime() {
-		return addTime;
-	}
-
-	public void setAddTime(Timestamp addTime) {
-		this.addTime = addTime;
-	}
-
-	public Train(Integer trainId, String trainNumber, String startStation, String endStation, String startTime,
-			String endTime, Integer price, Integer seatNumber, Timestamp addTime) {
-		this.trainId = trainId;
-		this.trainNumber = trainNumber;
-		this.startStation = startStation;
-		this.endStation = endStation;
-		this.startTime = startTime;
-		this.endTime = endTime;
-		this.price = price;
-		this.seatNumber = seatNumber;
-		this.addTime = addTime;
-	}
-
-	public Train(String trainNumber, String startStation, String endStation, String startTime, String endTime,
-			Integer price, Integer seatNumber, Timestamp addTime) {
-		this.trainNumber = trainNumber;
-		this.startStation = startStation;
-		this.endStation = endStation;
-		this.startTime = startTime;
-		this.endTime = endTime;
-		this.price = price;
-		this.seatNumber = seatNumber;
-		this.addTime = addTime;
-	}
-
-	public Train() {
-	}
-
-	@Override
-	public String toString() {
-		return "Train [trainId=" + trainId + ", trainNumber=" + trainNumber + ", startStation=" + startStation
-				+ ", endStation=" + endStation + ", startTime=" + startTime + ", endTime=" + endTime + ", price="
-				+ price + ", seatNumber=" + seatNumber + ", addTime=" + addTime + "]";
-	}
-
+    // 序号
+    private Integer trainId;
+    // 车次
+    private String trainNumber;
+    // 起始站
+    private String startStation;
+    // 终点站
+    private String endStation;
+    // 开车时间
+    private String startTime;
+    // 到站时间
+    private String endTime;
+    // 车票价格
+    private Integer price;
+    // 座位数量
+    private Integer seatNumber;
+    // 添加日期
+    private Timestamp addTime;
+
+    // 获取序号
+    public Integer getTrainId() {
+        return trainId;
+    }
+
+    // 设置序号
+    public void setTrainId(Integer trainId) {
+        this.trainId = trainId;
+    }
+
+    // 获取车次
+    public String getTrainNumber() {
+        return trainNumber;
+    }
+
+    // 设置车次
+    public void setTrainNumber(String trainNumber) {
+        this.trainNumber = trainNumber;
+    }
+
+    // 获取起始站
+    public String getStartStation() {
+        return startStation;
+    }
+
+    // 设置起始站
+    public void setStartStation(String startStation) {
+        this.startStation = startStation;
+    }
+
+    // 获取终点站
+    public String getEndStation() {
+        return endStation;
+    }
+
+    // 设置终点站
+    public void setEndStation(String endStation) {
+        this.endStation = endStation;
+    }
+
+    // 获取开车时间
+    public String getStartTime() {
+        return startTime;
+    }
+
+    // 设置开车时间
+    public void setStartTime(String startTime) {
+        this.startTime = startTime;
+    }
+
+    // 获取到站时间
+    public String getEndTime() {
+        return endTime;
+    }
+
+    // 设置到站时间
+    public void setEndTime(String endTime) {
+        this.endTime = endTime;
+    }
+
+    // 获取车票价格
+    public Integer getPrice() {
+        return price;
+    }
+
+    // 设置车票价格
+    public void setPrice(Integer price) {
+        this.price = price;
+    }
+
+    // 获取座位数量
+    public Integer getSeatNumber() {
+        return seatNumber;
+    }
+
+    // 设置座位数量
+    public void setSeatNumber(Integer seatNumber) {
+        this.seatNumber = seatNumber;
+    }
+
+    // 获取添加日期
+    public Timestamp getAddTime() {
+        return addTime;
+    }
+
+    // 设置添加日期
+    public void setAddTime(Timestamp addTime) {
+        this.addTime = addTime;
+    }
+
+    // 构造函数，包含所有属性
+    public Train(Integer trainId, String trainNumber, String startStation, String endStation, String startTime,
+            String endTime, Integer price, Integer seatNumber, Timestamp addTime) {
+        this.trainId = trainId;
+        this.trainNumber = trainNumber;
+        this.startStation = startStation;
+        this.endStation = endStation;
+        this.startTime = startTime;
+        this.endTime = endTime;
+        this.price = price;
+        this.seatNumber = seatNumber;
+        this.addTime = addTime;
+    }
+
+    // 构造函数，不包含trainId
+    public Train(String trainNumber, String startStation, String endStation, String startTime, String endTime,
+            Integer price, Integer seatNumber, Timestamp addTime) {
+        this.trainNumber = trainNumber;
+        this.startStation = startStation;
+        this.endStation = endStation;
+        this.startTime = startTime;
+        this.endTime = endTime;
+        this.price = price;
+        this.seatNumber = seatNumber;
+        this.addTime = addTime;
+    }
+
+    // 无参构造函数
+    public Train() {
+    }
+
+    // 返回Train对象的字符串表示形式
+    @Override
+    public String toString() {
+        return "Train [trainId=" + trainId + ", trainNumber=" + trainNumber + ", startStation=" + startStation
+                + ", endStation=" + endStation + ", startTime=" + startTime + ", endTime=" + endTime + ", price="
+                + price + ", seatNumber=" + seatNumber + ", addTime=" + addTime + "]";
+    }
 }