將intellij想法連接到sql server數據庫

Question

社區！

我目前正在使用真棒Intellij IDEA終極版學習Java。我試圖連接到本地的SQL Server數據庫，但我很難做到這一點。最初，我嘗試使用內置的工具（我能夠成功連接，但它看起來像是讓我能夠在它的Intellij控制檯上運行SQL查詢。更具體地說，我創建了一個基本的GUI客戶可以在其中輸入他們的個人信息，並且我希望將這些信息存儲在Customers SQL表中。我也嘗試使用JDBC，但出於某種原因，我得到錯誤「com.microsoft.sqlserver.jdbc.SQLServerDriver 「我沒有下載所需的驅動程序，並將它放在我的項目的lib文件夾中，但我不知道還有什麼可以做的，我的猜測是我沒有正確鏈接或將jar文件與驅動程序放在我的項目中。 Intellij文檔對於SQL Tools來說是非常有限的，它只是基本的功能，如果有人能夠在我的JDBC方法中指出我的錯誤，或者深入瞭解Intellij的SQL Tools，我會很感激。你先進的時間試圖幫助這6個月老新手:) 這裏是我的代碼：

import java.sql.*; 
import javafx.application.Application; 
import javafx.geometry.Insets; 
import javafx.scene.*; 
import javafx.scene.control.Button; 
import javafx.scene.control.Label; 
import javafx.scene.control.TextField; 
import javafx.scene.layout.GridPane; 
import javafx.stage.Stage; 

public class Main extends Application { 

String name; 
Stage window; 
Scene scene; 
Button submitButton = new Button("Submit"); 
Label fNameLabel = new Label("First Name:"); 
Label lNameLabel = new Label("Last Name:"); 
Label birthDateLabel = new Label("DOB:"); 
Label addressLabel = new Label("Address:"); 
Label emailLabel = new Label("E-mail:"); 
Label phoneLabel = new Label("Phone:"); 
TextField fNameTextField = new TextField(); 
TextField lNameTextField = new TextField(); 
TextField birthDateTextField = new TextField(); 
TextField addressTextField = new TextField(); 
TextField emailTextField = new TextField(); 
TextField phoneTextField = new TextField(); 


public static void main(String args[]) { 

    launch(args); 

} 

@Override 
public void start(Stage primaryStage) throws Exception { 

    window = primaryStage; 
    window.setTitle("Customer Information"); 
    window.setOnCloseRequest(e -> { 
     e.consume(); 
     closeWindow(); 
    }); 

    //create GripPane scene 
    GridPane grid = new GridPane(); 
    grid.setPadding(new Insets(10,10,10,10)); 
    grid.setVgap(10); 
    grid.setHgap(10); 

    //set location of labels 
    GridPane.setConstraints(fNameLabel,3,0); 
    GridPane.setConstraints(lNameLabel,3,1); 
    GridPane.setConstraints(birthDateLabel,3,2); 
    GridPane.setConstraints(addressLabel,3,3); 
    GridPane.setConstraints(emailLabel,3,4); 
    GridPane.setConstraints(phoneLabel,3,5); 

    //set location of TextFields 
    GridPane.setConstraints(fNameTextField,4,0); 
    GridPane.setConstraints(lNameTextField,4,1); 
    GridPane.setConstraints(birthDateTextField,4,2); 
    GridPane.setConstraints(addressTextField,4,3); 
    GridPane.setConstraints(emailTextField,4,4); 
    GridPane.setConstraints(phoneTextField,4,5); 

    //set PromptText 
    birthDateTextField.setPromptText("mm/dd/yyyy"); 
    emailTextField.setPromptText("example@example.com"); 

    //set button location 
    GridPane.setConstraints(submitButton, 4, 6); 

    //add all elements to grid 
    grid.getChildren().addAll(fNameLabel,fNameTextField,lNameLabel,lNameTextField, 
           birthDateLabel,birthDateTextField,addressLabel,addressTextField, 
           emailLabel,emailTextField,phoneLabel,phoneTextField,submitButton); 

    scene = new Scene(grid, 400, 400); 

    window.setScene(scene); 
    window.show(); 

    } 

    //properly exit out of app 
    private void closeWindow() { 
    boolean answer = ConfirmationBox.display("title", "Are you sure you want to exit?"); 
     if (answer) { 
     window.close(); 
    } 
    } 
} 

SQL類試圖連接：關於選擇的IntelliJ

import java.sql.*; 
public class SQLMethods { 
    public static void main(String[] args) { 
    try { 
     Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); 
     String url = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;databaseName=CaiMaster"; 

     Connection conn = DriverManager.getConnection(url); 
     Statement statement = conn.createStatement(); 
     ResultSet resultSet; 

     resultSet = statement.executeQuery("SELECT Fname, Address FROM Customers WHERE Fname = 'Cai'"); 
     String lastName = resultSet.getString("Fname"); 
     String address = resultSet.getString("Address"); 
     System.out.println(lastName); 
     System.out.println(address); 
     conn.close(); 
     } catch (Exception e) { 
     System.err.println("Got an exception! "); 
     System.err.println(e.getMessage()); 

    } 
    } 
    } 

Answer 1

祝賀。 JetBrains毫無例外地成爲市場上最好的IDE。

將依賴項下的/ lib目錄添加到您的項目中，您將獲得更多成功。

我不相信你的網址是正確的。嘗試像這樣，一旦你得到排序/ lib目錄：

String url = "jdbc:sqlserver://localhost:1433;databaseName=CaiMaster"; 

試試這個，看看它是否效果更好：

/** 
* SQL utility methods 
* User: MDUFFY 
* Date: 5/31/2016 
* Time: 4:41 PM 
* @link http://stackoverflow.com/questions/37536372/connect-intellij-idea-to-sql-server-database/37536406?noredirect=1#comment62595302_37536406 
*/ 

import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 


public class SQLMethods { 

    public static final String DEFAULT_DRIVER_CLASS = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; 
    public static final String DEFAULT_URL = "jdbc:sqlserver://localhost:1433;databaseName=CaiMaster"; 
    private static final String DEFAULT_USERNAME = ""; 
    private static final String DEFAULT_PASSWORD = ""; 
    public static final String FIND_ALL_CUSTOMERS_QUERY = "SELECT Fname, Address FROM Customers "; 
    private static final String BY_FIRST_NAME = "WHERE FNAME = ? "; 


    public static void main(String[] args) { 
     Connection connection = null; 
     try { 
      connection = SQLMethods.getConnection(DEFAULT_DRIVER_CLASS, DEFAULT_URL, DEFAULT_USERNAME, DEFAULT_PASSWORD); 
      Customer customer = SQLMethods.findCustomer(connection, "Cai"); 
      System.out.println(customer); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } finally { 
      SQLMethods.close(connection); 
     } 
    } 

    public static Connection getConnection(String driverClass, String url, String username, String password) throws SQLException, ClassNotFoundException { 
     Class.forName(driverClass); 
     return DriverManager.getConnection(url, username, password); 
    } 

    public static void close(Connection connection) { 
     try { 
      if (connection != null) { 
       connection.close(); 
      } 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 
    } 

    public static void close(Statement statement) { 
     try { 
      if (statement != null) { 
       statement.close(); 
      } 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 
    } 

    public static void close(ResultSet resultSet) { 
     try { 
      if (resultSet != null) { 
       resultSet.close(); 
      } 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 
    } 

    public static Customer findCustomer(Connection connection, String name) { 
     Customer customer = null; 
     PreparedStatement ps = null; 
     ResultSet rs = null; 
     try { 
      ps = connection.prepareStatement(FIND_ALL_CUSTOMERS_QUERY + BY_FIRST_NAME); 
      ps.setString(1, name); 
      rs = ps.executeQuery(); 
      while (rs.next()) { 
       String firstName = rs.getString("Fname"); 
       String address = rs.getString("Address"); 
       customer = new Customer(address, firstName); 
      } 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } finally { 
      SQLMethods.close(rs); 
      SQLMethods.close(ps); 
     } 
     return customer; 
    } 
} 

class Customer { 
    private final String firstName; 
    private final String address; 

    public Customer(String address, String firstName) { 
     this.address = address; 
     this.firstName = firstName; 
    } 

    public String getFirstName() { 
     return firstName; 
    } 

    public String getAddress() { 
     return address; 
    } 

    @Override 
    public String toString() { 
     final StringBuilder sb = new StringBuilder("Customer{"); 
     sb.append("firstName='").append(firstName).append('\''); 
     sb.append(", address='").append(address).append('\''); 
     sb.append('}'); 
     return sb.toString(); 
    } 
} 

Answer 2

正如@duffymo說，我也是不知道的正確性你網址。另外，您在getConnection(url)方法中錯過了您的用戶名和密碼。它應該是這樣的：

String url = "jdbc:sqlserver://localhost\\SQLEXPRESS:1433;databaseName=CaiMaster"; 
    String username = "user"; 
    String password = "pass"; 
    Connection conn = DriverManager.getConnection(url,username,password); 

    Statement st = conn.createStatement(); 

希望這會有所幫助。讓我知道。