在Windows上设置Java R接口（JRI）

Question

我已经关注了网络上的指南并查看了有关stackoverflow的问题，但我仍然无法在Windows上设置JRI。

以下是我采取的步骤：

1）安装R.

2）在R中执行install.packages("rJava")以安装ryava

3）创建一个值为R_HOME的C:\Program Files\R\R-3.1.2系统变量

4）将以下内容添加到我的PATH变量：C:\Program Files\R\R-3.1.2\bin\x64;C:\Users\USERNAME\Documents\R\win-library\3.1\rJava\jri\x64

5）在IntelliJ中添加了JRI.jar（位于C:\Users\USERNAME\Documents\R\win-library\3.1\rJava\jri中）作为依赖项

6）将IntelliJ中的VM选项设置为-Djava.library.path=C:\Users\USERNAME\Documents\R\win-library\3.1\rJava\jri\x64

7）启动R并执行library("rJava")

8）运行我的程序来测试是否所有设置

收到以下错误：

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000000006c726096, pid=5860, tid=6932
#
# JRE version: Java(TM) SE Runtime Environment (8.0_31-b13) (build 1.8.0_31-b13)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.31-b07 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C  [R.dll+0x26096]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\USERNAME\Documents\Project\hs_err_pid5860.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

如果我删除VM选项，以便未指定java.library.path，则会收到以下错误：

Cannot find JRI native library!
Please make sure that the JRI native library is in a directory listed in java.library.path.

java.lang.UnsatisfiedLinkError: no jri in java.library.path
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1865)
    at java.lang.Runtime.loadLibrary0(Runtime.java:870)
    at java.lang.System.loadLibrary(System.java:1119)
    at org.rosuda.JRI.Rengine.<clinit>(Rengine.java:19)
    at com.coagsm.cs.fyp.Test.<clinit>(Test.java:11)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:260)

Answer 1

你如何实例化Rengine？

它应该是这样的：

Rengine rengine = new Rengine(args, false, null);

其中，args可以来自你的主要方法。

让我知道这个是否奏效！

Answer 2

最新的（2018年）对我来说是这样的： -

export R_HOME=$(R RHOME)

然后编译： -

String[] enginargs = {"--no-save"};
REngine engine = org.rosuda.REngine.JRI.JRIEngine.createEngine(enginargs, null, false);

try {
    engine.parseAndEval("print(\"Hello from R\");");
}
catch(Exception e ) {
    System.err.println("OOps:-" + e.getMessage());
}
finally {
    engine.close();
}

然后在运行java时，将LD_LIBRARY_PATH设置为包含JR或设置-Djava.library.path例如

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/R/site-library/rJava/jri/

要么

java -Djava.library.path=/usr/local/lib/R/site-library/rJava/jri/ MyMainClass