Error : loadNamespace()里算'rJava'时.onLoad失败了

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本文解决在64位Windows系统中安装R包rJava和Rwordseg遇到的问题，包括因操作系统与Java版本不匹配导致的错误及解决方法。

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64位windows在安装rJava和Rwordseg时报错以及解决办法，详细过程如下。

<code class="hljs tex has-numbering">> install.packages('rJava')
--- 在此連線階段时请选用CRAN的鏡子 ---
试开URL’http://mirrors.xmu.edu.cn/CRAN/bin/windows/contrib/3.1/rJava_0.9-7.zip'
Content type 'application/zip' length 761221 bytes (743 KB)
打开了URL
downloaded 743 KB

程序包‘rJava’打开成功，MD5和检查也通过

下载的二进制程序包在
        C:<span class="hljs-command">\Users</span><span class="hljs-command">\asus</span><span class="hljs-command">\AppData</span><span class="hljs-command">\Local</span><span class="hljs-command">\Temp</span><span class="hljs-command">\RtmpUT</span>48J3<span class="hljs-command">\downloaded</span>_packages里</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li></ul>

通过install.packages(‘rJava’)下载安装rJava没有问题。

<code class="hljs r has-numbering">> <span class="hljs-keyword">library</span>(rJava)
Error : loadNamespace()里算<span class="hljs-string">'rJava'</span>时.onLoad失败了，详细内容：
  调用: inDL(x, as.logical(local), as.logical(now), <span class="hljs-keyword">...</span>)
  错误: 无法载入共享目标对象‘C:/Program Files/R/R-<span class="hljs-number">3.1</span><span class="hljs-number">.3</span>/<span class="hljs-keyword">library</span>/rJava/libs/i386/rJava.dll’：:
  LoadLibrary failure:  %<span class="hljs-number">1</span> 不是有效的 Win32 应用程序。

错误: ‘rJava’程辑包或名字空间载入失败，</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li></ul>

加载rJava报错，这里R客户端使用的是windows 32bit，操作系统的版本是64bit，系统安装的java是64bit的，跟rJava不兼容。

<code class="hljs lasso has-numbering">C:<span class="hljs-subst">\</span>Users<span class="hljs-subst">\</span>asus<span class="hljs-subst">></span>java <span class="hljs-attribute">-version</span>
java version <span class="hljs-string">"1.8.0_45"</span>
Java(TM) SE Runtime Environment (build <span class="hljs-number">1.8</span><span class="hljs-number">.0</span>_45<span class="hljs-attribute">-b14</span>)
Java HotSpot(TM) <span class="hljs-subst">**</span><span class="hljs-number">64</span><span class="hljs-attribute">-Bit</span><span class="hljs-subst">**</span> Server VM (build <span class="hljs-number">25.45</span><span class="hljs-attribute">-b02</span>, mixed mode)</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li></ul>

解决方法，使用32bit的jre，通过重新设置环境变量。

<code class="hljs tex has-numbering">> Sys.setenv(JAVA_HOME='C:<span class="hljs-command">\\</span>Program Files (x86)<span class="hljs-command">\\</span>Java<span class="hljs-command">\\</span>jre6')
> library('rJava')</code><ul style="" class="pre-numbering"><li>1</li><li>2</li></ul>

重新设置环境变量之后再加载rJava，ok

<code class="hljs vhdl has-numbering">> install.packages(<span class="hljs-string">"Rwordseg"</span>, repos = <span class="hljs-string">"http://R-Forge.R-project.org"</span>, <span class="hljs-keyword">type</span> = <span class="hljs-string">"source"</span>)
试开URL’http://R-Forge.R-project.org/src/contrib/Rwordseg_0<span class="hljs-number">.2</span>-<span class="hljs-number">1.</span>tar.gz'
Content <span class="hljs-keyword">type</span> <span class="hljs-attribute">'application</span>/x-gzip' length <span class="hljs-number">5445754</span> bytes (<span class="hljs-number">5.2</span> MB)
打开了URL
downloaded <span class="hljs-number">5.2</span> MB

* installing *source* <span class="hljs-keyword">package</span> <span class="hljs-attribute">'Rwordseg</span>' ...
** R
** demo
** inst
** preparing <span class="hljs-keyword">package</span> <span class="hljs-keyword">for</span> lazy loading
** help
*** installing help indices
** building <span class="hljs-keyword">package</span> indices
** testing <span class="hljs-keyword">if</span> installed <span class="hljs-keyword">package</span> can be loaded
*** arch - i386
<span class="hljs-number">2015</span>-<span class="hljs-number">8</span>-<span class="hljs-number">31</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">07</span> org.ansj.util.MyStaticValue <clinit>
警告: <span class="hljs-keyword">not</span> find <span class="hljs-keyword">library</span>.properties <span class="hljs-keyword">in</span> classpath <span class="hljs-keyword">use</span> it by <span class="hljs-keyword">default</span> !
<span class="hljs-number">2015</span>-<span class="hljs-number">8</span>-<span class="hljs-number">31</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">08</span> org.ansj.<span class="hljs-keyword">library</span>.UserDefineLibrary loadLibrary
警告: init userLibrary  waring :<span class="hljs-keyword">library</span>/<span class="hljs-keyword">default</span>.dic because : <span class="hljs-keyword">not</span> find that <span class="hljs-keyword">file</span> <span class="hljs-keyword">or</span> can <span class="hljs-keyword">not</span> <span class="hljs-keyword">to</span> read !
<span class="hljs-number">2015</span>-<span class="hljs-number">8</span>-<span class="hljs-number">31</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">08</span> org.ansj.<span class="hljs-keyword">library</span>.UserDefineLibrary initAmbiguityLibrary
警告: init ambiguity  waring :<span class="hljs-keyword">library</span>/ambiguity.dic because : <span class="hljs-keyword">not</span> find that <span class="hljs-keyword">file</span> <span class="hljs-keyword">or</span> can <span class="hljs-keyword">not</span> <span class="hljs-keyword">to</span> read !
<span class="hljs-number">2015</span>-<span class="hljs-number">8</span>-<span class="hljs-number">31</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">08</span> org.ansj.<span class="hljs-keyword">library</span>.UserDefineLibrary loadFile
信息: init user userLibrary ok path <span class="hljs-keyword">is</span> : C:\Program Files\R\R-<span class="hljs-number">3.1</span><span class="hljs-number">.3</span>\<span class="hljs-keyword">library</span>\Rwordseg\config\userdic
<span class="hljs-number">2015</span>-<span class="hljs-number">8</span>-<span class="hljs-number">31</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">09</span> org.ansj.<span class="hljs-keyword">library</span>.InitDictionary init
信息: init core <span class="hljs-keyword">library</span> ok <span class="hljs-keyword">use</span> <span class="hljs-typename">time</span> :<span class="hljs-number">1570</span>
<span class="hljs-number">2015</span>-<span class="hljs-number">8</span>-<span class="hljs-number">31</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">11</span> org.ansj.<span class="hljs-keyword">library</span>.NgramLibrary <clinit>
信息: init ngram ok <span class="hljs-keyword">use</span> <span class="hljs-typename">time</span> :<span class="hljs-number">1492</span>
*** arch - x64
八月 <span class="hljs-number">31</span>, <span class="hljs-number">2015</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">14</span> 上午 org.ansj.util.MyStaticValue <clinit>
警告: <span class="hljs-keyword">not</span> find <span class="hljs-keyword">library</span>.properties <span class="hljs-keyword">in</span> classpath <span class="hljs-keyword">use</span> it by <span class="hljs-keyword">default</span> !
八月 <span class="hljs-number">31</span>, <span class="hljs-number">2015</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">14</span> 上午 org.ansj.<span class="hljs-keyword">library</span>.UserDefineLibrary loadLibrary
警告: init userLibrary  waring :<span class="hljs-keyword">library</span>/<span class="hljs-keyword">default</span>.dic because : <span class="hljs-keyword">not</span> find that <span class="hljs-keyword">file</span> <span class="hljs-keyword">or</span> can <span class="hljs-keyword">not</span> <span class="hljs-keyword">to</span> read !
八月 <span class="hljs-number">31</span>, <span class="hljs-number">2015</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">14</span> 上午 org.ansj.<span class="hljs-keyword">library</span>.UserDefineLibrary initAmbiguityLibrary
警告: init ambiguity  waring :<span class="hljs-keyword">library</span>/ambiguity.dic because : <span class="hljs-keyword">not</span> find that <span class="hljs-keyword">file</span> <span class="hljs-keyword">or</span> can <span class="hljs-keyword">not</span> <span class="hljs-keyword">to</span> read !
八月 <span class="hljs-number">31</span>, <span class="hljs-number">2015</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">14</span> 上午 org.ansj.<span class="hljs-keyword">library</span>.UserDefineLibrary loadFile
信息: init user userLibrary ok path <span class="hljs-keyword">is</span> : C:\Program Files\R\R-<span class="hljs-number">3.1</span><span class="hljs-number">.3</span>\<span class="hljs-keyword">library</span>\Rwordseg\config\userdic
八月 <span class="hljs-number">31</span>, <span class="hljs-number">2015</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">15</span> 上午 org.ansj.<span class="hljs-keyword">library</span>.InitDictionary init
信息: init core <span class="hljs-keyword">library</span> ok <span class="hljs-keyword">use</span> <span class="hljs-typename">time</span> :<span class="hljs-number">1107</span>
八月 <span class="hljs-number">31</span>, <span class="hljs-number">2015</span> <span class="hljs-number">11</span>:<span class="hljs-number">34</span>:<span class="hljs-number">16</span> 上午 org.ansj.<span class="hljs-keyword">library</span>.NgramLibrary <clinit>
信息: init ngram ok <span class="hljs-keyword">use</span> <span class="hljs-typename">time</span> :<span class="hljs-number">675</span>
* DONE (Rwordseg)

下载的程序包在
        ‘C:\Users\asus\AppData\Local\Temp\RtmpUT48J3\downloaded_packages’里
> <span class="hljs-keyword">library</span>(Rwordseg)
# Version: <span class="hljs-number">0.2</span>-<span class="hljs-number">1</span>       </code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li><li>31</li><li>32</li><li>33</li><li>34</li><li>35</li><li>36</li><li>37</li><li>38</li><li>39</li><li>40</li><li>41</li><li>42</li><li>43</li><li>44</li><li>45</li><li>46</li><li>47</li></ul>

安装Rwordseg完成。

这里需要注意的就是jre的版本问题，一定要32位的。