Since the retest of Huagong needs to program a database and interactive interface on the computer, many seniors recommend using c#. Since I have been learning java before, I plan to write it in java. Java is used here to connect to the sql server database. Hereby record

First, go to the official website to download the sqlserver jar package, and enter the following websitehttps://www.microsoft.com/en-us/download/details.aspx?id=11774, Click Download, enter the interface as shown in Figure 1, and select the compressed package at the bottom

figure 1

After downloading, unzip the file, as shown in Figure 2. Obtain the jdk1.8 and jdk1.7 jar packages (my understanding is this, please correct me if there is any error), choose the appropriate jar package according to your own project. To facilitate future use, copy these two jar packages to a folder. If I copy it to the java_connect_sqlServerJar folder of Disk E, as shown in Figure 3

figure 2

image 3

Next, we need to import this jar package into the project we built, right-click the java project, select build path->configure build path, as shown in Figure 4. Then in the new interface, select the library menu interfaceadd extendal jarsButton, just select the jar package you copied earlier. This is the basic process of adding jar to a java project.

Figure 4

Then you can connect to the sql server database in your project. The specific code is as follows

public class Test {
	//Return the connection object
	public static Connection Conection()throws Exception{
		 //Drive
		String driveName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
		 //databasename is the name of the database you want to connect to
		String dbURL="jdbc:sqlserver://localhost:1433;DatabaseName=library";
		 //Database login name
		String username="sa";
		 //Password
		String password="123";
		Class.forName(driveName);
		 		//Connect to the database 
		Connection dbConn=DriverManager.getConnection(dbURL, username, password);
		
		return dbConn;
	}
	public static void main(String[] args) {
		 //Test to see if it is connected
		Connection con=null;
		try{
			con=Conection();
		if(con!=null)
			System.out.println("success");
		else
			System.out.println("fail");
		}catch(Exception e){
			e.printStackTrace();
		}
		finally{
			 //Finally execute to close the database
			try {
				con.close();
				 System.out.println("Database has been closed");
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}