Call to localhost/127.0.0.1:9000 failed on connection exception:java.net.ConnectException的解决方案

Call to localhost/127.0.0.1:9000 failed on connection exception:java.net.ConnectException的解决方案

参考文章：

（1）Call to localhost/127.0.0.1:9000 failed on connection exception:java.net.ConnectException的解决方案

（2）https://www.cnblogs.com/kailugaji/p/10150625.html

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Call to localhost/127.0.0.1:9000 failed on connection exception:java.net.ConnectException的解决方案

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