【解决方法】// 需要在构造图层provider前声明
Cesium.Credential.CREDENTIAL = new Cesium.Credential([
{
rooturl: "http://localhost:8090/portalproxy/iserver/services/3D-Buildings/rest/realspace/datas/MosaicResult@dem",
type: "key",
value: "SHf9H7YWmdMCSDRks4gdPxNF",
},
{
rooturl: "http://localhost:8090/portalproxy/iserver/services/3D-CBD/rest/realspace",
type: "key",
value: "4x3T2UMNjlc78ugvfmo7MbDC",
},
]);