本文解析了 Java 中出现 java.net.ConnectException: Connection refused: connect 的原因及解决方法。该异常通常发生在尝试连接到未监听对应端口的服务时，涉及 PlainSocketImpl 类的 socketConnect 方法。
java.net.ConnectException:Connectionrefused:connectatjava.net.PlainSocketImpl.socketConnect(NativeMethod)atjava.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)atj...
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:519)
at java.net.Socket.connect(Socket.java:469)
at java.net.Socket.(Socket.java:366)
at java.net.Socket.(Socket.java:180)
at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:456)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:371)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:452)
这个是什么问题？？？
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