在 Windows 上设置 Java R 接口 (JRI)

Question

我已经按照网络上的指南进行操作并查看了有关 Whosebug 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")安装rJava

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

4) 将以下内容添加到我的 PATH 变量中：C:\Program Files\R\R-3.1.2\bin\x64;C:\Users\USERNAME\Documents\R\win-library.1\rJava\jri\x64

5) 在 IntelliJ

中添加了 JRI.jar（位于 C:\Users\USERNAME\Documents\R\win-library.1\rJava\jri）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.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一切都已设置好

得到以下错误：

#
# 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

你是如何实例化Rengine的？

应该是这样的：

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

其中，参数可能来自您的主要方法。

如果可行，请告诉我！

Answer 2

最近（2018）对我来说是这样做的：-

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();
}

然后当运行时 java 要么设置 LD_LIBRARY_PATH 包含 JRI 或者设置 -Djava.library.path 例如

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

或

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

在 Windows 上设置 Java R 接口 (JRI)

Setting up Java R Interface (JRI) on Windows

java

r

jri

rjava