java web中向postgreSQL插入当前时间

方式1 常用插入方式

Timestamp currentTime= new Timestamp(System.currentTimeMillis()); 
String sql = "INSERT INTO message(date_create) VALUES (" + "‘" + currentTime  + "‘" + ");";

方式2 使用 占位符

Timestamp currentTime= new Timestamp(System.currentTimeMillis()); 
String sql =  "INSERT INTO message( date_create) VALUES (?);";
PreparedStatement pst = conn.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
pst.setTimestamp(1, currentTime);  
pst.executeUpdate();  
pst.close();    

方式3 使用postgreSQL自带函数

String sql = "INSERT INTO message(date_create) VALUES (LOCALTIMESTAMP);";