该程序说明了如何使用文件系统模块提供的createReadStream()和createWriteStream()功能使用可读和可写流复制文件。
//需要文件系统模块 var fs = require('fs'); /* Create readable stream to file in current directory (__dirname) named 'node.txt' Use utf8 encoding Read the data in 16-kilobyte chunks */ var readable = fs.createReadStream(__dirname + '/node.txt', { encoding: 'utf8', highWaterMark: 16 * 1024 }); // 创建可写流 var writable = fs.createWriteStream(__dirname + '/nodeCopy.txt'); // 将每个数据块写入可写流 readable.on('data', function(chunk) { writable.write(chunk); });