products0

PC25-SklepWeb/pom.xml

@@ -19,6 +19,12 @@
 			<version>10.0.0</version>
 			<scope>provided</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+			<version>42.6.0</version>
+			<scope>runtime</scope>
+		</dependency>
 	</dependencies>
 
 	<build>

PC25-SklepWeb/src/main/java/sklep/web/Products0.java

+package sklep.web;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+@WebServlet("/products0")
+public class Products0 extends HttpServlet {
+	   
+    @Override
+    protected void doGet(HttpServletRequest requets, HttpServletResponse response) throws ServletException, IOException {
+        response.setContentType("text/plain");
+        response.setCharacterEncoding("UTF-8");
+        PrintWriter out = response.getWriter();
+        out.println("Zaraz odczytam produkty z bazy...");
+        
+        final String url = "jdbc:postgresql://localhost/sklep";
+        final String sql = "SELECT * FROM products";
+        
+        try(Connection c = DriverManager.getConnection(url , "kurs", "abc123");
+            Statement stmt = c.createStatement();
+            ResultSet rs = stmt.executeQuery(sql)) {
+            
+            while(rs.next()) {
+                out.printf("Produkt nr %s to jest %s za cenę %s\n",
+                        rs.getInt("product_id"), rs.getString("product_name"), rs.getBigDecimal("price"));
+            }
+        } catch(SQLException e) {
+            out.println("Wielka bieda!");
+            e.printStackTrace(out);
+        }
+    }
+}