JAVA连接SAP时出现的错误(102) JCO_ERROR_COMMUNICATION：Connect to SAP gateway failed

JAVA连接SAP时出现的错误(102) JCO_ERROR_COMMUNICATION: Initialization of repository destination ABAP_AS_WITH_POOL failed: Connect to SAP gateway failed 解决办法

com.sap.conn.jco.JCoException: (102) JCO_ERROR_COMMUNICATION: Initialization of repository destination ABAP_AS_WITH_POOL  failed: Connect to SAP gateway failed
Connection parameters: TYPE=A DEST=ABAP_AS_WITH_POOL ASHOST=172.20.0.172 SYSNR=51 PCS=1

LOCATION    CPIC (TCP/IP) on local host with Unicode
ERROR       partner '172.20.0.172:3351' not reached
TIME        Sun Apr 28 18:47:59 2019
RELEASE     721
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3289
DETAIL      NiPConnect2: 172.20.0.172:3351
SYSTEM CALL connect
ERRNO       10060
ERRNO TEXT  WSAETIMEDOUT: Connection timed out
COUNTER     2
         at com.sap.conn.jco.rt.RfcDestination.getSystemID(RfcDestination.java:1100)
         at com.sap.conn.jco.rt.RepositoryManager.getRepository(RepositoryManager.java:29)
         at com.sap.conn.jco.rt.RfcDestination.initRepository(RfcDestination.java:1049)
         at com.sap.conn.jco.rt.RfcDestination.getRepository(RfcDestination.java:1193)
         at com.sap.conn.jco.rt.RfcDestination.getRepository(RfcDestination.java:33)
         at com.pcmall.MultiFromSAP.main(MultiFromSAP.java:16)
 
 Caused by: com.sap.conn.jco.JCoException: (102) JCO_ERROR_COMMUNICATION: Connect to SAP gateway failed
Connection parameters: TYPE=A DEST=ABAP_AS_WITH_POOL ASHOST=172.20.0.172 SYSNR=51 PCS=1

LOCATION    CPIC (TCP/IP) on local host with Unicode
ERROR       partner '172.20.0.172:3351' not reached
TIME        Sun Apr 28 18:47:59 2019
RELEASE     721
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3289
DETAIL      NiPConnect2: 172.20.0.172:3351
SYSTEM CALL connect
ERRNO       10060
ERRNO TEXT  WSAETIMEDOUT: Connection timed out
COUNTER     2
         at com.sap.conn.jco.rt.MiddlewareJavaRfc.generateJCoException(MiddlewareJavaRfc.java:625)
         at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcClient.connect(MiddlewareJavaRfc.java:1384)
         at com.sap.conn.jco.rt.ClientConnection.connect(ClientConnection.java:704)
         at com.sap.conn.jco.rt.RepositoryConnection.connect(RepositoryConnection.java:72)
         at com.sap.conn.jco.rt.PoolingFactory.init(PoolingFactory.java:115)
         at com.sap.conn.jco.rt.ConnectionManager.createFactory(ConnectionManager.java:349)
         at com.sap.conn.jco.rt.DefaultConnectionManager.createFactory(DefaultConnectionManager.java:46)
         at com.sap.conn.jco.rt.ConnectionManager.getFactory(ConnectionManager.java:323)
         at com.sap.conn.jco.rt.RfcDestination.getSystemID(RfcDestination.java:1094)
         ... 5 more
  
Caused by: RfcException:
           message: Connect to SAP gateway failed
Connection parameters: TYPE=A DEST=ABAP_AS_WITH_POOL ASHOST=172.20.0.172 SYSNR=51 PCS=1

LOCATION    CPIC (TCP/IP) on local host with Unicode
ERROR       partner '172.20.0.172:3351' not reached
TIME        Sun Apr 28 18:47:59 2019
RELEASE     721
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3289
DETAIL      NiPConnect2: 172.20.0.172:3351
SYSTEM CALL connect
ERRNO       10060
ERRNO TEXT  WSAETIMEDOUT: Connection timed out
COUNTER     2

       return code: RFC_FAILURE (1)
       error group: 102
       key: RFC_ERROR_COMMUNICATION
       at com.sap.conn.rfc.engine.RfcIoControl.error_end(RfcIoControl.java:259)
       at com.sap.conn.rfc.engine.RfcIoControl.ab_rfcopen(RfcIoControl.java:101)
       at com.sap.conn.rfc.api.RfcApi.RfcOpen(RfcApi.java:81)
       at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcClient.connect(MiddlewareJavaRfc.java:1348)
       ... 12 more

遇到以上错误时，你的连接程序中可能缺少了Router字符串

       connectProperties.setProperty(DestinationDataProvider.JCO_SAPROUTER，"   xxxxxx   ")；

加上这段代码，再试一下应该就可以了，希望可以帮到你。