public boolean updateState(String tradeNo, String state, String gmtPayment, String alipayTradeNo) { Orders orders = new Orders(); orders.setOrderNo(tradeNo); orders.setOrderState(state); orders.setPaymentTime(gmtPayment); orders.setAlipayNo(alipayTradeNo); ordersMapper.update(orders, new UpdateWrapper<Orders>().eq("order_no", tradeNo)); return true; }怎么外部调用时不更新alipayTradeNo
时间: 2024-03-25 18:36:59 浏览: 17
您可以在外部调用时将 `alipayTradeNo` 参数设置为 `null` 或空字符串,例如:
```
updateState("123456", "PAID", "2021-01-01 12:00:00", "");
```
这样就可以保证不会更新 `alipayTradeNo` 字段的值。另外,由于这个方法返回值始终为 `true`,所以您可以忽略它的返回结果。
相关问题
java.lang.Boolean cannot be cast to java.lang.String
java.lang.Boolean cannot be cast to java.lang.String的错误通常是由于将Boolean类型的值强制转换为String类型而引起的。在Java中,Boolean类型的值只能是true或false,而String类型的值可以是任何字符串。因此,将Boolean类型的值强制转换为String类型是不安全的,可能会导致类型转换异常。
解决这个问题的方法是使用Boolean.toString()方法将Boolean类型的值转换为String类型的值。例如:
```java
Boolean b = true;
String s = Boolean.toString(b);
```
这将把Boolean类型的值true转换为String类型的值"true"。
另外,如果您需要将Boolean类型的值转换为字符串并将其添加到列表或数组中,可以使用以下代码:
```java
List<String> list = new ArrayList<>();
Boolean b = true;
list.add(Boolean.toString(b));
```
public boolean login(String name,String password);
As an AI language model, I cannot access the implementation details of your system. However, based on the method signature provided, the login method takes two parameters, namely name and password, and returns a boolean value. The method is likely used for authentication purposes, where the user provides their login credentials (name and password) and the method verifies if the credentials are valid or not. The method may return true if the user is authenticated successfully, and false if the authentication fails.