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SequelizeConnectionRefusedError:连接ECONNREFUSED 127.0.0.1:3306

我使用 Sequelize 作为我的 Node js 应用程序和 Mysql 数据库的 ORM,在遵循一些教程后,我添加了此代码以将 mysql 连接到节点,但在录制 npm start 后,我​​收到此错误:无法连接到数据库:{ SequelizeConnectionRefusedError :连接ECONNREFUSED 127.0.0.1:3306

 const Sequelize = require('sequelize');

 // Option 1: Passing parameters separately
 const sequelize = new Sequelize('Education', 'root','', {
 host: '127.0.0.1',
 dialect: 'mysql'
 } );

  //test db 
 sequelize
.authenticate()
.then(() => {
  console.log('Connection has been established successfully.');
})
 .catch(err => {
 console.error('Unable to connect to the database:', err);
});
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mysql node.js express sequelize.js

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