44 lines
1.9 KiB
Java
44 lines
1.9 KiB
Java
/*
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Compile:
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javac PostgreSqlExample.java
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Run:
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java -cp postgresql-42.5.4.jar;. PostgreSqlExample
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*/
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.Statement;
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public class PostgreSqlExample {
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public static void main(String[] args) {
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try (Connection connection = DriverManager.getConnection("jdbc:postgresql://192.168.10.138:5432/example", "postgres", "postgres")) {
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System.out.println("Java JDBC PostgreSQL Example");
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// When this class first attempts to establish a connection, it automatically loads any JDBC 4.0 drivers found within
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// the class path. Note that your application must manually load any JDBC drivers prior to version 4.0.
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// Class.forName("org.postgresql.Driver");
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System.out.println("Connected to PostgreSQL database!");
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Statement statement = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
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statement.setFetchSize(10);
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System.out.println("Reading records.");
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//ResultSet resultSet = statement.executeQuery("SELECT * FROM test1 a, test1 b, test1 c, test1 d, test1 e, test1 f, test1 g, test1 h, test1 i, test1 j limit (10)");
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ResultSet resultSet = statement.executeQuery("SELECT * FROM test1 a, test1 b, test1 c, test1 d, test1 e, test1 f, test1 g, test1 h, test1 i, test1 j");
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while (resultSet.next()) {
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System.out.print(resultSet.getInt(1));
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System.out.println("-"+ resultSet.getString(2));
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}
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} /*catch (ClassNotFoundException e) {
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System.out.println("PostgreSQL JDBC driver not found.");
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e.printStackTrace();
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}*/ catch (SQLException e) {
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System.out.println("Connection failure.");
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e.printStackTrace();
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}
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}
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} |