42 lines
1.6 KiB
Java
42 lines
1.6 KiB
Java
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/*
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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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System.out.println("Connected to PostgreSQL database!");
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Statement statement = connection.createStatement();
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// For huge resultset the following two lines do the trick:
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statement.setFetchSize(100);
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connection.setAutoCommit(false);
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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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// Produce HUGE resultest
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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 (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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}
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