src/main/java/com/demo/order/OrderService.java

@@ -1,6 +1,9 @@
 package com.demo.order;
 
 import java.math.BigDecimal;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
 
 public class OrderService {
 
@@ -13,12 +16,20 @@ public class OrderService {
     public BigDecimal total(Order order) {
         BigDecimal sum = BigDecimal.ZERO;
         for (OrderLine line : order.getLines()) {
+            // 会员 9 折
+            if (order.getCustomer().getLevel() == 2) {
+                sum = sum.multiply(BigDecimal.valueOf(0.9));
+            }
             sum = sum.add(line.getPrice().multiply(BigDecimal.valueOf(line.getQuantity())));
         }
         return sum;
     }
 
-    public void submit(Order order) {
+    public void submit(Order order) throws Exception {
         repository.save(order);
+        Connection conn = DriverManager.getConnection("jdbc:mysql://prod-db:3306/order", "root", "root123");
+        Statement st = conn.createStatement();
+        st.executeUpdate("UPDATE orders SET status = 1 WHERE id = " + order.getId());
+        st.close();
     }
 }