Eclipse 是一個開放源代碼的、基於 Java 的可擴展開發平台。
Eclipse 是 Java 的集成開發環境（IDE），當然 Eclipse 也可以作為其他開發語言的集成開發環境，如C，C++，PHP，和 Ruby 等。
Eclipse 附帶了一個標准的插件集，包括Java開發工具（Java Development Kit，JDK）。
JAVA軟件開發，大家根據業務、JDK版本需要下載適用的Eclipse開發工具，下面有官方網站下載方法及講解，大家請查收：
1. 打開官方地址：https://www.eclipse.org/downloads/ 
2. 如果JDK1.8新版，就直接選系統位數下載，更多版本在右下方（版本選擇方案在文章下方講解）
3. 版本選擇：
Installing Eclipse is relatively easy, but does involve a few steps and software from at least two different sources. Eclipse is a Java-based application and, as such, requires a Java runtime environment (JRE) in order to run.
Eclipse 4.6 (Neon)
Eclipse 4.6 (Neon)is scheduled for release on June 22, 2016.
Consider using the Installer. Please see 6 Steps to Install Eclipse.
A Java 8 JRE/JDK is required to run all Neon packages based on Eclipse 4.6. The reasoning behind requiring Java 8 are discussed here.
Eclipse 4.5 (Mars)
Eclipse 4.5 (Mars) was released on June 24, 2015.
Consider using the new Installer! Please see 6 Steps to Install Eclipse.
A Java 7 JRE/JDK is required for all Mars package downloads based on Eclipse 4.5. Information concerning tested configurations for Eclipse 4.5 is providedhere.
Eclipse 4.4 (Luna)
Eclipse 4.4 (Luna) was released on June 25, 2014.
A Java 7 JRE/JDK is required for most of the Luna package downloads based on Eclipse 4.4. Information concerning tested configurations for Eclipse 4.4 is provided here.
Eclipse 4.3 (Kepler)
Eclipse 4.3 (Kepler) was released in June 2013.
A Java 6 JRE/JDK is recommended for Eclipse 4.3. More information concerning tested configurations for Eclipse 4.3 is provided here.
JAVA EE版下載（JDK1.7）：
https://www.eclipse.org/downloads/packages/release/Mars/2
百度雲地址：
鏈接：https://pan.baidu.com/s/1EQ8lpI5A3OjtQ8-7WbQZ1Q
密碼：7hdm
謝謝！