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我正在尝试使用nodejs运行mysql并且我安装了mysql（npm install --save mysql）并且我做了（node mysql）但出现了错误

Error: connect ECONNREFUSED 127.0.0.1:3306
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)
    --------------------
    at Protocol._enqueue (/Users/leejohn/Desktop/nodejs/node_modules/mysql/lib/protocol/Protocol.js:144:48)
    at Protocol.handshake (/Users/leejohn/Desktop/nodejs/node_modules/mysql/lib/protocol/Protocol.js:51:23)
    at Connection.connect (/Users/leejohn/Desktop/nodejs/node_modules/mysql/lib/Connection.js:116:18)
    at Object.<anonymous> (/Users/leejohn/Desktop/nodejs/mysql.js:9:12)
    at Module._compile (internal/modules/cjs/loader.js:1068:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1097:10)
    at Module.load (internal/modules/cjs/loader.js:933:32)
    at Function.Module._load (internal/modules/cjs/loader.js:774:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
    at internal/main/run_main_module.js:17:47 {
  errno: -61,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '127.0.0.1',
  port: 3306,
  fatal: true
}
undefined

这有什么问题？

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