本文介绍了java安装的环境变量的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如何在Windows中设置Java的环境变量(类路径)?

How to set the environment variables for Java in Windows (the classpath)?

推荐答案

Java SE开发工具包8u112 on a 64位Windows 7或Windows 8



设置以下用户环境变量(= = 用户变量类型的环境变量


  • JAVA_HOME: C:\ Program Files\Java\jdk1.8.0_112

  • JDK_HOME: %JAVA_HOME%

  • JRE_HOME: %JAVA_HOME%\ jre

  • CLASSPATH: 。;%JAVA_HOME%\ lib;%JAVA_HOME%\\ \\ jre\lib

  • 路径: your-unique-entries; %JAVA_HOME%\ bin (确保较长的 your-unique-entries 不包含对其他Java安装文件夹的任何其他引用。

  • JAVA_HOME : C:\Program Files\Java\jdk1.8.0_112
  • JDK_HOME : %JAVA_HOME%
  • JRE_HOME : %JAVA_HOME%\jre
  • CLASSPATH : .;%JAVA_HOME%\lib;%JAVA_HOME%\jre\lib
  • PATH : your-unique-entries;%JAVA_HOME%\bin (make sure that the longish your-unique-entries does not contain any other references to another Java installation folder.

请注意,这些环境变量来自mroot环境变量 JAVA_HOME 。这样可以在更新JDK时轻松更新环境变量。只需将 JAVA_HOME 指向全新安装。

Notice that these environment variables are derived from the "root" environment variable JAVA_HOME. This makes it easy to update your environment variables when updating the JDK. Just point JAVA_HOME to the fresh installation.


  • 使用值添加用户环境变量 JAVA_TOOL_OPTIONS -Dfile.encoding = UTF-8。这可确保Java(以及 Maven 等工具)使用 UTF-8的 Charset.defaultCharset()运行(而不是默认的 Windows-1252 )。在使用我自己的代码和其他代码进行wirking时,这已经避免了很多麻烦,不幸的是,这些代码经常采用(理智的)默认编码 UTF-8

  • 安装JDK时,它会添加到系统环境变量 路径条目 C:\ProgramData \ Oracle \\ \\Java\javapath; 。我有趣地注意到,在JDK安装更新期间,该目录中的链接没有得到更新。所以最好从 Path 系统中删除 C:\ProgramData \ Oracle \ Java \ _javapath; 环境变量,以便拥有一致的环境。

  • Add an user environment variable JAVA_TOOL_OPTIONS with value -Dfile.encoding="UTF-8". This ensures that Java (and tools such as Maven) will run with a Charset.defaultCharset() of UTF-8 (instead of the default Windows-1252). This has saved a lot of headaches when wirking with my own code and that of others, which unfortunately often assume the (sane) default encoding UTF-8.
  • When JDK is installed, it adds to the system environment variable Path an entry C:\ProgramData\Oracle\Java\javapath;. I anecdotally noticed that the links in that directory didn't get updated during an JDK installation update. So it's best to remove C:\ProgramData\Oracle\Java\javapath; from the Path system environment variable in order to have a consistent environment.

这篇关于java安装的环境变量的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-19 08:24