Java连接postgresql数据库

1.下载驱动jar
下载地址：https://jdbc.postgresql.org/download.html

2.导入jar包
新建lib文件夹，将下载的jar驱动包拖到文件夹中。

将jar驱动包添加到Libraries

3.程序代码如下：HelloWorld.java

package test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class HelloWorld {public static void main(String []args) {Connection connection=null;Statement statement =null;try{String url="jdbc:postgresql://127.0.0.1:5432/postgis";String user="postgres";String password = "123456";Class.forName("org.postgresql.Driver");connection= DriverManager.getConnection(url, user, password);System.out.println("是否成功连接pg数据库"+connection);String sql="select name from test";statement=connection.createStatement();ResultSet resultSet=statement.executeQuery(sql);while(resultSet.next()){String name=resultSet.getString(1);System.out.println(name);}}catch(Exception e){throw new RuntimeException(e);}finally{try{statement.close();}catch(SQLException e){e.printStackTrace();throw new RuntimeException(e);}finally{try{connection.close();}catch(SQLException e){e.printStackTrace();throw new RuntimeException(e);}}}}
}