【解决方案】在datasetInfo中传递连接参数，如下：
"datasetInfo": {
"type": "REGION",
"name": "newyorkRoads_L_1056690886",
"datasourceConnectionInfo": {
"engineType": "POSTGRESQL",
"dataBase": "supermap",
"password": "supermap",
"user": "postgres",
"server": "192.168.120.21"
}
}
