postgresql jdbc 连接数据库测试

1. 下载postgresql-8.4-702.jdbc4.jar
2. 点击 project->properties 在弹出的对话框里点 Libraries 在右边点击 Add External JARs 然后选择jdbc的jar文件即可
3. 安装postgresql数据库，为了处理方便安装pgAdmin连接客户端。
4. 编写测试程序：

import org.postgre<a href="/tag/sql/" target="_blank" class="keywords">sql</a>.*; import java.<a href="/tag/sql/" target="_blank" class="keywords">sql</a>.*; public class Postgre<a href="/tag/sql/" target="_blank" class="keywords">sql</a>Test { /** * @p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m args */ public static void main(String[] args) { // T<a href="/tag/odo/" target="_blank" class="keywords">odo</a> Auto-generated method stub try{ Class.forName("org.postgre<a href="/tag/sql/" target="_blank" class="keywords">sql</a>.Driver").newInstance(); String connectUrl ="jdbc:postgre<a href="/tag/sql/" target="_blank" class="keywords">sql</a>://127.0.0.1:5432/postgres"; Connection conn = DriverManager.getConnection(connectUrl,"postgres","sophie"); Statement st = conn.createStatement(); String <a href="/tag/sql/" target="_blank" class="keywords">sql</a> = " SELECT 1;"; ResultSet rs = st.executeQuery(<a href="/tag/sql/" target="_blank" class="keywords">sql</a>); while(rs.next()){ Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.out.println(rs.getInt(1)); } rs.close(); st.close(); conn.close(); }catch(Exception e){ e.<a href="/tag/printstacktrace/" target="_blank" class="keywords">printstacktrace</a>(); } } }

5.运行程序输出 1