java连接postgreSQL数据库简单使用 [转贴]

java连接postgreSQL数据库简单使用
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());
           }
       }
}