使用连接池;退出检查优化

utils/dbUtils.js

@@ -4,16 +4,16 @@ const fs = require('fs');
 const path = require('path');
 
 let globalConfig = JSON.parse(fs.readFileSync(path.join(__dirname, '../config.json'), 'utf8'));
-let database = null;
+let databaseName = null;
 
-function create(databaseName) {
-    database = databaseName;
+function create({ database }) {
+    databaseName = database;
 }
 
 async function query(sql, params) {
     let config = {
         ...globalConfig.mysql,
-        database: database,
+        database: databaseName,
     };
     // console.log(config);
 
@@ -34,6 +34,8 @@ async function query(sql, params) {
 }
 
 module.exports = {
+    setConnectionLimit: () => { },
     create: create,
     query: query,
+    close: () => { },
 }