Java/Gradle - connect to the database

Author: petrfaltus

java-gradle/build.gradle

@@ -1,3 +1,7 @@
+repositories {
+   mavenCentral()
+}
+
 apply plugin: 'java'
 
 version = '1.0-SNAPSHOT'
@@ -7,6 +11,10 @@ tasks.withType(JavaCompile) {
    options.encoding = 'UTF-8'
 }
 
+dependencies {
+   implementation 'com.microsoft.sqlserver:mssql-jdbc:8.4.0.jre14'
+}
+
 jar {
    manifest {
       attributes 'Main-Class': 'cz.petrfaltus.ms_sql_server.Program'
@@ -17,4 +25,6 @@ jar {
          it.isDirectory() ? it : zipTree(it)
       }
    }
+
+   exclude 'META-INF/*.RSA', 'META-INF/*.SF', 'META-INF/*.DSA'
 }

java-gradle/src/main/java/cz/petrfaltus/ms_sql_server/Program.java

@@ -2,9 +2,51 @@
 
 import static java.lang.System.out;
 
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+import java.util.Enumeration;
+import java.util.Properties;
+
 public class Program {
+	private static final String DB_DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
+	private static final String DB_TYPE = "jdbc:sqlserver";
+
+	private static final String DB_HOST = "localhost";
+	private static final int DB_PORT = 1433;
+	private static final String DB_NAME = "testdb";
+	private static final String DB_USERNAME = "testuser";
+	private static final String DB_PASSWORD = "T3stUs3r!";
+
 	public static void main(String[] args) {
-		out.println("OK");
+		try {
+			Class.forName(DB_DRIVER);
+
+			// Build the connection string and connect the database
+			String url = DB_TYPE + "://" + DB_HOST + ":" + DB_PORT + ";database=" + DB_NAME;
+			Connection conn = DriverManager.getConnection(url, DB_USERNAME, DB_PASSWORD);
+
+			Properties connInfo = conn.getClientInfo();
+			@SuppressWarnings("unchecked")
+			Enumeration<String> connInfoPropNames =  (Enumeration<String>) connInfo.propertyNames();
+			while (connInfoPropNames.hasMoreElements()) {
+				String key = connInfoPropNames.nextElement();
+				String value = connInfo.getProperty(key);
+				out.println(key + " : " + value);
+			}
+
+			// Disconnect the database
+			conn.close();
+
+		} catch (ClassNotFoundException cnfex) {
+			out.println(cnfex.getMessage());
+
+		} catch (SQLException sex) {
+			out.println("SQL error code: " + sex.getErrorCode());
+			out.println(sex.getMessage() + " " + sex.getErrorCode());
+
+		}
 
 	}