• pgsql.js

const { Client } = require('pg');
const config = {host: "127.0.0.1",database: "postgres",user: "postgres",password: "postgres",port: 5432, // 默认的PostgreSQL端口号
}const pg = require("pg");
const pool = new pg.Pool({host: "127.0.0.1",database: "postgres",user: "postgres",password: "postgres",port: 5432,max: 20,idleTimeoutMillis: 3000
})//新建连接的方法
function qurey_files(req, res) {var strSql = "select name, path, suffix, status, \to_char(upload_date_time,'yyyy-mm-dd_HH24:MI:ss') as time \from public.\"Test\" \ORDER BY key ASC";let client = new Client(config);client.connect();client.query(strSql, (err, result) => {if (err) {res.status(404).send(err.message);console.log(err);}else {res.send(result.rows);}client.end();})
}//使用线程池的方法
function qurey_files_pool(req, res) {var strSql = "select name, path, suffix, status, \to_char(upload_date_time,'yyyy-mm-dd_HH24:MI:ss') as time \from public.\"Test\" \ORDER BY key ASC";pool.connect((err, client, done)=>{// if (err) throw err;client.query(strSql, (err, result)=>{done();res.send(result.rows);})})
}module.exports = {qurey_files,qurey_files_pool
}

• server.js

const db = require('./server/pgsql')
db.qurey_files_pool(req, res)