1、下载并安装完idea之后需要下载一个jar包，下载地址http://idea.lanyus.com/jar/JetbrainsCrack-2.6.2.jar
2、将jar包拷贝到idea安装目录的bin目录下，我的目录是D:\Program Files\IntelliJ IDEA 2017.1.4\bin
3、用记事本或者notepad++打开并修改bin目录下的idea.exe.vmoptions和idea64.exe.vmoptions两个文件，在最后一行均添加-javaagent:D:\Program Files\IntelliJ IDEA 2017.1.4\bin\JetbrainsCrack-2.6.2.jar，注意这里的目录和你的idea目录一致
4、启动idea，在注册界面选择active code，输入下面的注册码
ThisCrackLicenseId-{ "licenseId":"ThisCrackLicenseId", "licenseeName":"idea", "assigneeName":"", "assigneeEmail":"idea@163.com", "licenseRestriction":"For This Crack, Only Test! Please support genuine!!!", "checkConcurrentUse":false, "products":[ {"code":"II","paidUpTo":"2099-12-31"}, {"code":"DM","paidUpTo":"2099-12-31"}, {"code":"AC","paidUpTo":"2099-12-31"}, {"code":"RS0","paidUpTo":"2099-12-31"}, {"code":"WS","paidUpTo":"2099-12-31"}, {"code":"DPN","paidUpTo":"2099-12-31"}, {"code":"RC","paidUpTo":"2099-12-31"}, {"code":"PS","paidUpTo":"2099-12-31"}, {"code":"DC","paidUpTo":"2099-12-31"}, {"code":"RM","paidUpTo":"2099-12-31"}, {"code":"CL","paidUpTo":"2099-12-31"}, {"code":"PC","paidUpTo":"2099-12-31"} ], "hash":"2911276/0", "gracePeriodDays":7, "autoProlongated":false}
到此完毕，该注册码有效期到2099年结束，如果中间出现启动不了idea的情况，请打开任务管理器，关闭idea进程重新启动idea
原文：http://www.cnblogs.com/1ning/p/7109920.html