输入 ant-version 报 Unable to locate tools.jar 的解决办法

Linux环境下安装 Ant后（前提：已配置好Java环境变量），输入 ant -version 时报 不能定位 tools.jar的问题。

[root@zouhengbin java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64]# ant -version
Unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64/lib/tools.jar
Apache Ant(TM) version 1.10.3 compiled on March 24 2018

解决办法：

将Windows环境下 C:\Program Files\Java\jdk1.8.0_45\lib 中的 tools.jar 拷贝到 /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64/jre/lib 中即可。

[root@zouhengbin java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64]# ant -version
Apache Ant(TM) version 1.10.3 compiled on March 24 2018
[root@zouhengbin java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64]# ant
Buildfile: build.xml does not exist!
Build failed
[root@zouhengbin java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64]#