batchupdate.java

本书属于《开发专家之 Sun ONE》系列丛书

//BatchUpdate.java
import java.sql.*;
public class BatchUpdate 
{

	public static void main(String args[]) throws SQLException 
{
		ResultSet rs = null;
		PreparedStatement ps = null;
		String url = "jdbc:mySubprotocol:myDataSource";
		Connection con;
		Statement stmt;
		try 
{
			Class.forName("myDriver.ClassName");
		}
catch(java.lang.ClassNotFoundException e) 
{
			System.err.print("ClassNotFoundException: ");
			System.err.println(e.getMessage());
		}

		try 
{
			con = DriverManager.getConnection(url,
									"myLogin", "myPassword");
			con.setAutoCommit(false);
			stmt = con.createStatement();  
			stmt.addBatch("INSERT INTO COFFEES " + 
				 "VALUES('Amaretto', 49, 9.99, 0, 0)");
			stmt.addBatch("INSERT INTO COFFEES " +
				"VALUES('Hazelnut', 49, 9.99, 0, 0)");
			stmt.addBatch("INSERT INTO COFFEES " +
				"VALUES('Amaretto_decaf', 49, 10.99, 0, 0)");
			stmt.addBatch("INSERT INTO COFFEES " +
				"VALUES('Hazelnut_decaf', 49, 10.99, 0, 0)");

			int [] updateCounts = stmt.executeBatch();
			con.commit();
			con.setAutoCommit(true);

			ResultSet uprs = stmt.executeQuery("SELECT * FROM COFFEES");
			System.out.println("Table COFFEES after insertion:");
			while (uprs.next()) 
{
				String name = uprs.getString("COF_NAME");
				int id = uprs.getInt("SUP_ID");
				float price = uprs.getFloat("PRICE");
				int sales = uprs.getInt("SALES");
				int total = uprs.getInt("TOTAL");
				System.out.print(name + "   " + id + "   " + price);
				System.out.println("   " + sales + "   " + total);
			}
			uprs.close();
			stmt.close();
			con.close();
		}
catch(BatchUpdateException b) 
{
			System.err.println("-----BatchUpdateException-----");
			System.err.println("SQLState:  " + b.getSQLState());
			System.err.println("Message:  " + b.getMessage());
			System.err.println("Vendor:  " + b.getErrorCode());
			System.err.print("Update counts:  ");
			int [] updateCounts = b.getUpdateCounts();
			for (int i = 0; i < updateCounts.length; i++) 
{
				System.err.print(updateCounts[i] + "   ");
			}
			System.err.println("");
		}
catch(SQLException ex) 
{
			System.err.println("-----SQLException-----");
			System.err.println("SQLState:  " + ex.getSQLState());
			System.err.println("Message:  " + ex.getMessage());
			System.err.println("Vendor:  " + ex.getErrorCode());
		}
	}
}