java 使用jdbc连接Greenplum数据库和Postgresql数据库

2024年1月24日 197次阅读 来源: PostgreSQL

1、公司使用的Greenplum和Postgresql，确实让我学到不少东西。简单将使用jdbc连接Greenplum和Postgresql数据库。由于使用maven仓库，不能下载Greenplum的jar包，但是可以下载Postgresql的jar包，所以Greenplum的jar包，自己可以百度自行下载。名字就叫做greenplum.jar。

maven依赖如下所示：

<!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>42.1.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils -->
<dependency>
    <groupId>commons-beanutils</groupId>
    <artifactId>commons-beanutils</artifactId>
    <version>1.9.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-collections/commons-collections -->
<dependency>
    <groupId>commons-collections</groupId>
    <artifactId>commons-collections</artifactId>
    <version>3.2.1</version>
</dependency>

 2、db.properties配置文件里面如下所示：

# 1.posgresql
posgresql_driver=org.postgresql.Driver
posgresql_url=jdbc:postgresql://192.168.xx.xx:5432/数据库名称(即schema)
posgresql_user=账号
posgresql_password=密码

# 2.greenplum
greenplum_driver=com.pivotal.jdbc.GreenplumDriver
greenplum_url=jdbc:pivotal:greenplum://192.168.xx.xx:5432;DatabaseName=数据库名称(即schema)
greenplum_user=账号
greenplum_password=密码

 3、然后连接Greenplum数据库和Postgresql数据库如下所示：

 1 public class JdbcUtils {
 2 
 3     // 1、Postgresql
 4     private static String postgresql_driver;
 5     private static String postgresql_url;
 6     private static String postgresql_user;
 7     private static String postgresql_password;
 8         
 9     // 2、Greenplum
10     private static String greenplum_driver;
11     private static String greenplum_url;
12     private static String greenplum_user;
13     private static String greenplum_password;
14 
15     // 1、Postgresql
16     static {
17         postgresql_driver = ResourceBundle.getBundle("db").getString("postgresql_driver");
18         postgresql_url = ResourceBundle.getBundle("db").getString("postgresql_url");
19         postgresql_user = ResourceBundle.getBundle("db").getString("postgresql_user");
20         postgresql_password = ResourceBundle.getBundle("db").getString("postgresql_password");
21     }
22 
23     // 2、Greenplum
24     static {
25         greenplum_driver = ResourceBundle.getBundle("db").getString("greenplum_driver");
26         greenplum_url = ResourceBundle.getBundle("db").getString("greenplum_url");
27         greenplum_user = ResourceBundle.getBundle("db").getString("greenplum_user");
28         greenplum_password = ResourceBundle.getBundle("db").getString("greenplum_password");
29     }    
30 
31 
32     // 1、Postgresql
33     public static Connection getPostgresqlConnection() throws ClassNotFoundException, SQLException {
34         // 加载数据库驱动
35         Class.forName(postgresql_driver);
36         // System.out.println("测试加载数据库成功");
37         Connection con = DriverManager.getConnection(postgresql_url, postgresql_user, postgresql_password);
38         // System.out.println("测试数据库链接成功");
39         return con;
40     }
41 
42     // 2、Greenplum
43     public static Connection getGreenplumConnection() throws ClassNotFoundException, SQLException {
44         // 加载数据库驱动
45         Class.forName(greenplum_driver);
46         //System.out.println("测试加载数据库成功");
47         Connection con = DriverManager.getConnection(greenplum_url, greenplum_user, greenplum_password);
48         //System.out.println("测试数据库链接成功");
49         return con;
50     }
51 
52     public static void main(String[] args) {
53             try {
54                 JdbcUtils.getPostgresqlConnection();
55                 System.out.println("汇聚数据区连接成功.....");
56                 System.out.println("=======================================");
57                 
58                 JdbcUtils.getGreenplumConnection();
59                 System.out.println("核心数据区连接成功.....");
60                 System.out.println("=======================================");
61                 
62             } catch (ClassNotFoundException e) {
63                 e.printStackTrace();
64             } catch (SQLException e) {
65                 e.printStackTrace();
66             }
67         }
68 }

4、最后，可以根据公司业务进行一些增删改查操作。略。

待续……

    原文作者：PostgreSQL
    原文地址: https://www.cnblogs.com/biehongli/p/9760375.html
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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