lookup.java

网络书店的设计与实现 网络书店的设计与实现

//: c15:jdbc:Lookup.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Looks up email addresses in a 
// local database using JDBC.
import java.sql.*;

public class Lookup {
  public static void main(String[] args) {
    String dbUrl = "jdbc:odbc:people";
    String user = "";
    String password = "";
    try {
      // Load the driver (registers itself)
      Class.forName(
        "sun.jdbc.odbc.JdbcOdbcDriver");
      Connection c = DriverManager.getConnection(
        dbUrl, user, password);
      Statement s = c.createStatement();
      // SQL code:
      ResultSet r = 
        s.executeQuery(
          "SELECT FIRST, LAST, EMAIL " +
          "FROM people.csv people " +
          "WHERE " +
          "(LAST='" + args[0] + "') " +
          " AND (EMAIL Is Not Null) " +
          "ORDER BY FIRST");
      while(r.next()) {
        // Capitalization doesn't matter:
        System.out.println(
          r.getString("Last") + ", " 
          + r.getString("fIRST")
          + ": " + r.getString("EMAIL") );
      }
      s.close(); // Also closes ResultSet
    } catch(Exception e) {
      e.printStackTrace();
    }
  }
} ///:~