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);
}
}
}
}
}

运行结果：



分类:
Java