一、下載安裝
1、打開官網：http://www.jetbrains.com/idea/，點擊頁面中的“DOWNLOAD”
2、根據自己的需要選擇下載的IntelliJ IDEA版本，此處我的電腦是Windows7 64 位的，我選擇的是Community（社區版）
3、雙擊下載好的安裝包
4、點擊“Next”
5、選擇安裝位置，然後點擊“Next”
6、勾選安裝選型，然後點擊“Next”
7、點擊“Install”，進入安裝
8、安裝完成，點擊“Finish”
二、啓動
1、雙擊安裝好的桌面IntelliJ IDEA圖標
2、點擊“OK”
3、勾選同意，再點擊“Continue”
4、選擇“Skip Remaining and Set Defaults”
備註：如果你安裝的是Ultimate版本，那麼可能需要祕鑰破解
在第2步，點擊“OK”的時候，會彈出輸入祕鑰框，選擇“Activation code”，然後輸入祕鑰即可成功激活。祕鑰如下：
MTW881U3Z5-eyJsaWNlbnNlSWQiOiJNVFc4ODFVM1o1IiwibGljZW5zZWVOYW1lIjoiTnNzIEltIiwiYXNzaWduZWVOYW1lIjoiIiwiYXNzaWduZWVFbWFpbCI6IiIsImxpY2Vuc2VSZXN0cmljdGlvbiI6IkZvciBlZHVjYXRpb25hbCB1c2Ugb25seSIsImNoZWNrQ29uY3VycmVudFVzZSI6ZmFsc2UsInByb2R1Y3RzIjpbeyJjb2RlIjoiSUkiLCJwYWlkVXBUbyI6IjIwMTktMTEtMDYifSx7ImNvZGUiOiJBQyIsInBhaWRVcFRvIjoiMjAxOS0xMS0wNiJ9LHsiY29kZSI6IkRQTiIsInBhaWRVcFRvIjoiMjAxOS0xMS0wNiJ9LHsiY29kZSI6IlBTIiwicGFpZFVwVG8iOiIyMDE5LTExLTA2In0seyJjb2RlIjoiR08iLCJwYWlkVXBUbyI6IjIwMTktMTEtMDYifSx7ImNvZGUiOiJETSIsInBhaWRVcFRvIjoiMjAxOS0xMS0wNiJ9LHsiY29kZSI6IkNMIiwicGFpZFVwVG8iOiIyMDE5LTExLTA2In0seyJjb2RlIjoiUlMwIiwicGFpZFVwVG8iOiIyMDE5LTExLTA2In0seyJjb2RlIjoiUkMiLCJwYWlkVXBUbyI6IjIwMTktMTEtMDYifSx7ImNvZGUiOiJSRCIsInBhaWRVcFRvIjoiMjAxOS0xMS0wNiJ9LHsiY29kZSI6IlBDIiwicGFpZFVwVG8iOiIyMDE5LTExLTA2In0seyJjb2RlIjoiUk0iLCJwYWlkVXBUbyI6IjIwMTktMTEtMDYifSx7ImNvZGUiOiJXUyIsInBhaWRVcFRvIjoiMjAxOS0xMS0wNiJ9LHsiY29kZSI6IkRCIiwicGFpZFVwVG8iOiIyMDE5LTExLTA2In0seyJjb2RlIjoiREMiLCJwYWlkVXBUbyI6IjIwMTktMTEtMDYifSx7ImNvZGUiOiJSU1UiLCJwYWlkVXBUbyI6IjIwMTktMTEtMDYifV0sImhhc2giOiIxMDgyODE0Ni8wIiwiZ3JhY2VQZXJpb2REYXlzIjowLCJhdXRvUHJvbG9uZ2F0ZWQiOmZhbHNlLCJpc0F1dG9Qcm9sb25nYXRlZCI6ZmFsc2V9-aKyalfjUfiV5UXfhaMGgOqrMzTYy2rnsmobL47k8tTpR/jvG6HeL3FxxleetI+W+Anw3ZSe8QAMsSxqVS4podwlQgIe7f+3w7zyAT1j8HMVlfl2h96KzygdGpDSbwTbwOkJ6/5TQOPgAP86mkaSiM97KgvkZV/2nXQHRz1yhm+MT+OsioTwxDhd/22sSGq6KuIztZ03UvSciEmyrPdl2ueJw1WuT9YmFjdtTm9G7LuXvCM6eav+BgCRm+wwtUeDfoQqigbp0t6FQgkdQrcjoWvLSB0IUgp/f4qGf254fA7lXskT2VCFdDvi0jgxLyMVct1cKnPdM6fkHnbdSXKYDWw==-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