java - 如何测试 jdbc 中的更新方法

Question

所以我有一个更新客户的更新方法，它看起来像:

public static Customer UpdateCustomer(Customer customer){
    System.out.println("Updating customer ");


    try {
        statement = connection.createStatement();
        statement.executeUpdate("UPDATE customer " + "SET id = " + customer.getCustomerId() + "SET name = " + customer.getName() + "SET tagNo = " + customer.getTagNo() + 
                "SET telephoneNo = " + customer.getTelephoneNo() + "SET email = " + customer.getEmail() + "SET noOfTimesRecycles = " + 
                customer.getNoOfTimesRecycled());


    } catch (SQLException ex) {
        System.out.println("Error in updating customer");
        ex.printStackTrace();
    }

    return customer;
}

虽然我不确定如何测试它。到目前为止，我所获得的测试位是这样的:

public static Customer UpdateCustomer(Customer customer){

    return UpdateCustomer(customer); 
}

public static void main(String [] args) 
{
    connectTest();

    UpdateCustomer(105,"John", 4179, "+4475855216");

            closeTest();
}

好吧，它在 UpdateCustpmer 处给了我错误，因为它期待某种类型的客户。

有人可以帮我解决这个问题吗？谢谢

Answer 1

您需要将一个Customer 对象传递给UpdateCustomer 方法，创建一个Customer 对象并用您的值填充它，然后传递它到 UpdateCustomer 方法，例如:

public static void main(String [] args) 
{
    connectTest();
    Customer customer = new Customer(105,"John", 4179, "+4475855216");// note you should have a constructor takes the passed arguments. or you could use setter methods
    UpdateCustomer(customer);

    closeTest();
}

您需要阅读关于 methods 的内容和 constructors在Java中

编辑:

你不需要每次都使用SET关键字，只需要用逗号分隔你想要更新的列，比如:

public static Customer UpdateCustomer(Customer customer){
    System.out.println("Updating customer ");


    try {
        statement = connection.createStatement();
        statement.executeUpdate("UPDATE customer " + "SET id = " + customer.getCustomerId() + ",name = " + customer.getName() + ",tagNo = " + customer.getTagNo() + 
            ",telephoneNo = " + customer.getTelephoneNo() + ",email = " + customer.getEmail() + "SET noOfTimesRecycles = " + 
            customer.getNoOfTimesRecycled());


    } catch (SQLException ex) {
        System.out.println("Error in updating customer");
        ex.printStackTrace();
    }

    return customer;
}