git init

src/main/java/com/bwie/dao/BillDao.java

@@ -1,5 +1,7 @@
 package com.bwie.dao;
 
+import com.bwie.pojo.Bill;
+
 import java.sql.*;
 
 public class BillDao {
@@ -11,11 +13,12 @@ public class BillDao {
 
     }
     // 添加数据到表
-    public void add(String someColumn) {
+    public void add(Bill bill) {
-        String sql = "INSERT INTO t_bill (bill_Monery) VALUES (?)";
+        String sql = "INSERT INTO t_bill  VALUES (0,?,?)";
         try (Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
              PreparedStatement pstmt = conn.prepareStatement(sql)) {
-            pstmt.setString(1, someColumn);
+            pstmt.setDate(1, bill.getBillDate());
+            pstmt.setDouble(2, bill.getBillMonery());
             pstmt.executeUpdate();
         } catch (SQLException e) {
             e.printStackTrace();

src/main/java/com/bwie/pojo/Bill.java

@@ -3,12 +3,12 @@ package com.bwie.pojo;
 
 import java.util.Date;
 
-public class bill {
+public class Bill {
     private Integer billId;
     private Date billDate;
     private double billMonery;
 
-    public bill() {
+    public Bill() {
     }
 
     public Integer getBillId() {
@@ -19,8 +19,8 @@ public class bill {
         this.billId = billId;
     }
 
-    public Date getBillDate() {
+    public java.sql.Date getBillDate() {
-        return billDate;
+        return (java.sql.Date) billDate;
     }
 
     public void setBillDate(Date billDate) {
@@ -35,7 +35,7 @@ public class bill {
         this.billMonery = billMonery;
     }
 
-    public bill(Integer billId, Date billDate, double billMonery) {
+    public Bill(Integer billId, Date billDate, double billMonery) {
         this.billId = billId;
         this.billDate = billDate;
         this.billMonery = billMonery;