bash java CLASSPATH 环境变量上的罐子被忽略
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原文地址: http://stackoverflow.com/questions/15906233/
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Jars on the java CLASSPATH environment variable are ignored
提问by toom
In my ~/.bashrc I export my java CLASSPATH the following way:
在我的 ~/.bashrc 中，我通过以下方式导出我的 java CLASSPATH：
CLASSPATH=$CLASSPATH:/home/user/java/libs/apache-ant-1.9.0/lib/*:/home/user/java/MyProject/libs/*
The folder "/home/user/java/MyProject/libs/" contains the following jars:
文件夹“/home/user/java/MyProject/libs/”包含以下 jars：
colt.jar mysql-connector-java-5.1.22-bin.jar
concurrent.jar postgresql-8.4-703.jdbc4.jar
When I try to compile a class of my project that imports parts the colt.jar, I get an error message:
当我尝试编译导入 colt.jar 部分的项目类时，我收到一条错误消息：
/src$ javac visualization/VisualizeCorrelationMatrix.java
visualization/VisualizeCorrelationMatrix.java:16: cannot access cern.colt.matrix.impl.SparseDoubleMatrix2D
class file for cern.colt.matrix.impl.SparseDoubleMatrix2D not found
int N = cm.columns();
^
But when compling it the followin way it works without errors:
但是当按照以下方式编译它时，它可以正常工作：
/src$ javac -cp ".:/home/user/java/MyProject/libs/*" visualization/VisualizeCorrelationMatrix.java
I checked that the paths in the CLASSPATH variable and the manuel optino -cp are 100% identical. Also an echo $CLASSPATH returns the correct path.
我检查了 CLASSPATH 变量和 manuel optino -cp 中的路径是否 100% 相同。还有一个 echo $CLASSPATH 返回正确的路径。
Why do I still get this error?
为什么我仍然收到此错误？
回答by imp25
You need to exportthe new classpath variable in your bashrcline:
您需要export在您的bashrc行中添加新的类路径变量：
export CLASSPATH=$CLASSPATH:/home/user/java/libs/apache-ant-1.9.0/lib/*:/home/user/java/MyProject/libs/*
Also if the shell you are compiling the java in was created before you changed your bashrc file you'll want to reread the bashrc file using source ~/.bashrc.
此外，如果在更改 bashrc 文件之前创建了用于编译 java 的 shell，则需要使用 .bashrc 重新读取 bashrc 文件source ~/.bashrc。
