1、下载postgreSQL-jdbc
https://jdbc.postgresql.org/download.html
2、获取连接
Class.forName("org.postgresql.Driver"); Connection connection = DriverManager.getConnection(url,user,password);3、插入数据、创建表、更新数据、删除数据
connection.setAutoCommit(false);//关闭自动提交 Statement stmt = connection.createStatement(); String sql = "SQL相关语句"; stmt.executeUpdate(sql);4、查看数据库
connection.setAutoCommit(false);//关闭自动提交 Statement stmt = connection.createStatement(); String sql = "查询语句"; ResultSet rs = stmt.executeQuery(sql); while(rs.next()){ int id = rs.getInt(columnLabel); String name = rs.getString(columnLabel); float salary = rs.getFloat(columnLabel); }5 关闭连接
rs.close(); stmt.close(); connection.close();6 整个过程需要使用try catch语句
try{ jdbc语句 }catch (Exception e){ System.err.println( e.getClass().getName()+": "+ e.getMessage() ); System.exit(0); }