目录

com.microsoft.sqlserver.jdbc.SQLServerException-到主机-的-TCPIP-连接失败-java.net.ConnectException-Connection-timed-out-connect数据库

JAY.LIN 收录于未分类

2024-12-29 约 30 字预计阅读 1 分钟

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目录

com.microsoft.sqlserver.jdbc.SQLServerException: 到主机的 TCP/IP 连接失败。 java.net.ConnectException: Connection timed out: connect数据库

java.lang.NullPointerException

at op.op_schoolinfo.getAllSchool(op_schoolinfo.java:39)

at op.op_schoolinfo.main(op_schoolinfo.java:187)