java连接postgreSQL数据库实例!

java连接postgreSQL数据库实例!
到http://wwwmaster.postgresql.org/download/mirrors-ftp?file=binary%2Fv8.1.4%2Fwin32%2Fpostgresql-8.1.4-1.zip
选择一个下载速度快的国家下载 postgresql数据库

到

http://jdbc.postgresql.org/download.html 下载jdbc驱动


安装 postgresql，建表 

-- Table: testtable

-- DROP TABLE testtable;

CREATE TABLE testtable
(
  id bigserial NOT NULL ,
  name varchar ( 30 ),
   CONSTRAINT testtable_pkey PRIMARY KEY (id)
)
WITHOUT OIDS;
ALTER TABLE testtable OWNER TO postgres;


CREATE SEQUENCE testtable_id_seq
  INCREMENT 1
  MINVALUE 1
  MAXVALUE 9223372036854775807
  START 3
  CACHE 1 ;
ALTER TABLE testtable_id_seq OWNER TO postgres;

连接测试...
package com.test;
import org.postgresql. * ;
import java.sql. * ;

public
class TestDB  {
    public TestDB()  {
    }
    public
static
void main(String args[])
     {
        System.out.print( " this is a test " );
         try
           {
            Class.forName( " org.postgresql.Driver " ).newInstance();
            String url = " jdbc:postgresql://localhost:5432/postgres " ;
            Connection con = DriverManager.getConnection(url, " postgres " , " 1234 " );
            Statement st = con.createStatement();
            String sql = " select * from testtable " ;
            ResultSet rs = st.executeQuery(sql);
             while (rs.next())
              {
                System.out.print(rs.getInt( 1 ));
                System.out.println(rs.getString( 2 ));
            }
            rs.close();
            st.close();
            con.close();
           

        }
         catch (Exception ee)
          {
            System.out.print(ee.getMessage());
        }
    }
}