65 lines
2.3 KiB
Java
65 lines
2.3 KiB
Java
package de.swingbe.postgres_java;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.SQLException;
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import java.sql.Statement;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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public class JavaPostgreSqlBatchUpdates {
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public static void main(String[] args) {
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//connection URL for the postgres database
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//jdbc:postgresql://<host>:<port>/<database name>
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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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try (Connection con = DriverManager.getConnection(url, user, password)) {
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try (Statement st = con.createStatement()) {
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//autocommit should always be turned off when doing batch updates
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con.setAutoCommit(false);
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//create a new table called friends and insert five rows into it
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st.addBatch("DROP TABLE IF EXISTS friends");
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st.addBatch("CREATE TABLE friends(id serial, name VARCHAR(10))");
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st.addBatch("INSERT INTO friends(name) VALUES ('Jane')");
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st.addBatch("INSERT INTO friends(name) VALUES ('Tom')");
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st.addBatch("INSERT INTO friends(name) VALUES ('Rebecca')");
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st.addBatch("INSERT INTO friends(name) VALUES ('Jim')");
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st.addBatch("INSERT INTO friends(name) VALUES ('Robert')");
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//method returns an array of committed changes
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int[] counts = st.executeBatch();
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con.commit();
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System.out.println("Committed " + counts.length + " updates");
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} catch (SQLException ex) {
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if (con != null) {
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try {
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con.rollback();
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} catch (SQLException ex1) {
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Logger lgr = Logger.getLogger(JavaPostgreSqlBatchUpdates.class.getName());
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lgr.log(Level.WARNING, ex1.getMessage(), ex1);
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}
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}
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Logger lgr = Logger.getLogger(JavaPostgreSqlBatchUpdates.class.getName());
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lgr.log(Level.SEVERE, ex.getMessage(), ex);
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}
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} catch (SQLException ex) {
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Logger lgr = Logger.getLogger(JavaPostgreSqlBatchUpdates.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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} |