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;
}

我不确定如何测试它。我现在所有的测试位都是这样的：

public static Customer UpdateCustomer(Customer customer){

    return UpdateCustomer(customer); 
}

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

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

            closeTest();
}

它在UpdateCustpmer上给我错误，因为它期待Type客户的某些东西。

任何人都可以帮助我吗？谢谢

Answer 1

您需要将Customer对象传递给UpdateCustomer方法，创建一个Customer对象并用您的值填充它，然后将其传递给UpdateCustomer方法，像：

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java中的methods和constructors

编辑：

您每次都不需要使用SET关键字，只需将要更新的列分隔为昏迷，例如：

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;
}

Answer 2

简单的测试方法如下。

public static Customer UpdateCustomer（Customer customer）{ System.out.println（“正在更新客户”）;

try {
    statement = connection.createStatement();
    String query = "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();

    System.out.println("Update query is:::"+query);
    statement.executeUpdate(query);


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

return customer;

}

现在，复制“update query is”的日志并粘贴到数据库控制台（mysql或任何其他使用的数据库）中。并检查错误信息。

如何在jdbc中测试更新方法

2 个答案: