feat(postgres_java): added class JavaPostgreSqlPrepared.java

postgres_java/pom.xml

@@ -38,7 +38,7 @@
                 <artifactId>exec-maven-plugin</artifactId>
                 <version>1.6.0</version>
                 <configuration>
-                    <mainClass>de.swingbe.postgres_java.JavaPostgreSqlVersion
+                    <mainClass>de.swingbe.postgres_java.JavaPostgreSqlPrepared
                     </mainClass>
                 </configuration>
             </plugin>

postgres_java/src/main/java/de/swingbe/postgres_java/JavaPostgreSqlPrepared.java

@@ -0,0 +1,42 @@
+package de.swingbe.postgres_java;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class JavaPostgreSqlPrepared {
+
+    public static void main(String[] args) {
+
+        String url = "jdbc:postgresql://localhost:5432/testdb";
+        String user = "usr";
+        String password = "#password";
+
+        //add new author to authors table
+        int id = 6;
+        String author = "Trygve Gulbranssen";
+        String query = "INSERT INTO authors(id, name) VALUES(?, ?)";
+
+        //create prepared statement using placeholders instead of directly writing values
+        try (Connection con = DriverManager.getConnection(url, user, password);
+             PreparedStatement pst = con.prepareStatement(query)) {
+
+            //bound integer to placeholder
+            pst.setInt(1, id);
+
+            //bound string to placeholder
+            pst.setString(2, author);
+
+            //execute statement with executeUpdate method if you do not expect any data to be returned
+            pst.executeUpdate();
+
+        } catch (SQLException ex) {
+
+            Logger lgr = Logger.getLogger(JavaPostgreSqlPrepared.class.getName());
+            lgr.log(Level.SEVERE, ex.getMessage(), ex);
+        }
+    }
+}