38 lines
1.2 KiB
Java
38 lines
1.2 KiB
Java
package de.swingbe.postgres_java;
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import java.sql.*;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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public class JavaPostgreSqlRetrieve {
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public static void main(String[] args) {
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String url = "jdbc:postgresql://localhost:5432/testdb";
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String user = "usr";
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String password = "#password";
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//get all columns from a table
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String query = "SELECT * FROM authors";
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//create prepared statement using placeholders instead of directly writing values
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try (Connection con = DriverManager.getConnection(url, user, password);
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PreparedStatement pst = con.prepareStatement(query);
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ResultSet rs = pst.executeQuery()) {
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//advance cursor to the next record
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//return false if there are no more records in the result set
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while (rs.next()) {
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System.out.print(rs.getInt(1));
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System.out.print(" | ");
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System.out.println(rs.getString(2));
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}
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} catch (SQLException ex) {
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Logger lgr = Logger.getLogger(JavaPostgreSqlRetrieve.class.getName());
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lgr.log(Level.SEVERE, ex.getMessage(), ex);
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}
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}
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}
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