如何測試在JDBC

Question

更新方法所以，我有一個更新的方法來更新的客戶，它看起來像：

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; 
} 

我不知道怎麼雖然測試。我所有的錢高達現在的測試位是這樣的：

public static Customer UpdateCustomer(Customer customer){ 

    return UpdateCustomer(customer); 
} 

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

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

      closeTest(); 
} 

那麼它給了我錯誤的UpdateCustpmer因爲它預計類型的客戶的東西。

能anyonw幫助我？謝謝

Answer 1

簡單的測試方法如下。

公共靜態客戶UpdateCustomer（客戶的客戶）{ 的System.out.println（ 「更新客戶」）;

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; 

}

現在，複製的日誌「更新查詢」並粘貼到數據庫控制檯（MySQL或找你使用任何其它數據庫）。並在那裏檢查錯誤消息。

Answer 2

你需要一個Customer對象傳遞給UpdateCustomer方法，創建一個Customer對象，並使用你的價值填充它，然後將它傳遞給UpdateCustomer方法，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(); 
} 

你需要閱讀關於methods和Java中constructors

編輯：

你並不需要使用SET關鍵字每個T ime，只是分開你想更新昏迷的列，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; 
}