在Java应用程序中集成RapidMiner [英] Integration of RapidMiner in Java application
问题描述
我在RapidMiner中有一个文本分类过程。它从指定的excel ssheet读取测试数据并进行分类。我还有一个小型Java应用程序，它正在运行这个过程。现在我想在我的应用程序中创建文件输入部分，这样每次我都可以从我的应用程序（而不是RapidMiner）中指定excel文件。
任何提示？
I have a text classification process in RapidMiner. It reads the test data from specified excel ssheet and does the classification. I have also a small Java application which is just running this process. Now I want to make the file input part in my aplication, so that everytime I would be able to specify the excel file from my application (not from RapidMiner). Any hints?
这是代码：
import com.rapidminer.RapidMiner;
import com.rapidminer.Process;
import com.rapidminer.example.Attribute;
import com.rapidminer.example.Example;
import com.rapidminer.example.ExampleSet;
import com.rapidminer.operator.IOContainer;
import com.rapidminer.operator.Operator;
import com.rapidminer.operator.OperatorException;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import com.rapidminer.operator.io.ExcelExampleSource;
import com.rapidminer.tools.XMLException;
public class Classification {
public static void main(String [] args) throws Exception{
ExampleSet resultSet1 = null;
IOContainer ioInput = null;
IOContainer ioResult;
try {
RapidMiner.setExecutionMode(RapidMiner.ExecutionMode.COMMAND_LINE);
RapidMiner.init();
Process pr = new Process(new File("C:\\Users\\MP-TEST\\Desktop\\Rapid_Test\\Wieder_Model.rmp"));
Operator op = pr.getOperator("Read Excel");
op.setParameter(ExcelExampleSource.PARAMETER_EXCEL_FILE, "C:\\Users\\MP-TEST\\Desktop\\Rapid_Test\\HaendlerRatings_neu.xls");
ioResult = pr.run(ioInput);
if (ioResult.getElementAt(0) instanceof ExampleSet) {
resultSet1 = (ExampleSet)ioResult.getElementAt(0);
for (Example example : resultSet1) {
Iterator<Attribute> allAtts = example.getAttributes().allAttributes();
while(allAtts.hasNext()) {
Attribute a = allAtts.next();
if (a.isNumerical()) {
double value = example.getValue(a);
System.out.println(value);
} else {
String value = example.getValueAsString(a);
System.out.println(value);
}
}
}
}
} catch (IOException | XMLException | OperatorException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
这是错误：
Apr 09, 2013 9:06:05 AM com.rapidminer.Process run
INFO: Process C:\Users\MP-TEST\Desktop\Rapid_Test\Wieder_Model.rmp starts
com.rapidminer.operator.UserError: A value for the parameter 'excel_file' must be specified!
at com.rapidminer.operator.nio.model.ExcelResultSetConfiguration.makeDataResultSet(ExcelResultSetConfiguration.java:316)
at com.rapidminer.operator.nio.model.AbstractDataResultSetReader.createExampleSet(AbstractDataResultSetReader.java:127)
at com.rapidminer.operator.io.AbstractExampleSource.read(AbstractExampleSource.java:52)
at com.rapidminer.operator.io.AbstractExampleSource.read(AbstractExampleSource.java:1)
at com.rapidminer.operator.io.AbstractReader.doWork(AbstractReader.java:126)
at com.rapidminer.operator.Operator.execute(Operator.java:855)
at com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:51)
at com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:711)
at com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:379)
at com.rapidminer.operator.Operator.execute(Operator.java:855)
at com.rapidminer.Process.run(Process.java:949)
at com.rapidminer.Process.run(Process.java:873)
at com.rapidminer.Process.run(Process.java:832)
at com.rapidminer.Process.run(Process.java:827)
at Classification.main(Classification.java:29)
祝你好运
Armen
推荐答案
我看到两种方式要做到这一点。
I see two ways to do that.
第一个是以编程方式更改流程的XML定义。 Rapidminer进程由XML文件指定，扩展名为 .rmp 。在文件中，您将找到要更改的运算符的定义。这是一个指定Read Excel运算符的简单过程的摘录：
The first one would be to change programatically the XML definition of your process. Rapidminer processes are specified by an XML file with .rmp extension. In the file you will find the definition of the operator you wish to change. This is an excerpt from a simple process specifiing the Read Excel operator:
<operator activated="true" class="read_excel" compatibility="5.3.005" expanded="true" height="60" name="Read Excel" width="90" x="313" y="75">
<parameter key="excel_file" value="D:\file.xls"/> <!-- HERE IS THE FILE PATH -->
<parameter key="sheet_number" value="1"/>
<parameter key="imported_cell_range" value="A1"/>
<parameter key="encoding" value="SYSTEM"/>
<parameter key="first_row_as_names" value="true"/>
<list key="annotations"/>
<parameter key="date_format" value=""/>
<parameter key="time_zone" value="SYSTEM"/>
<parameter key="locale" value="English (United States)"/>
<list key="data_set_meta_data_information"/>
<parameter key="read_not_matching_values_as_missings" value="true"/>
<parameter key="datamanagement" value="double_array"/>
</operator>
我突出显示了excel文件路径所在的部分。您可以在应用程序中覆盖它。小心不要破坏XML文件。
I highlighted the part where the path to the excel file is. You can overwrite that in your application. Just be careful not to break the XML file.
另一种方法是在加载进程后修改运算符你的java应用程序。您可以通过 Process＃getOperator（String name）或 Process＃getAllOperators（）来获取对运算符的引用。我想它应该属于这些类中的一个：
The other way is to modify the operator after you load the process in your java application. You can get a reference to your operator by Process#getOperator(String name) or Process#getAllOperators(). I guess it should be of one of these classes:
com.rapidminer.operator.io.ExcelExampleSource
com.rapidminer.operator.nio.ExcelExampleSource
当您找到正确的运算符时，您可以通过<$ c修改路径$ c>运算符#setParameter（字符串键，字符串值）。
When you find the correct operator you modify the path by Operator#setParameter(String key, String Value).
此代码适用于RapidMiner 5.3 :(此过程只是读取Excel运算符和写入CSV运算符）
This code works for me with RapidMiner 5.3: (the process is just a Read Excel operator and a Write CSV operator)
package sorapid;
import com.rapidminer.Process;
import com.rapidminer.RapidMiner;
import com.rapidminer.operator.Operator;
import com.rapidminer.operator.OperatorException;
import com.rapidminer.operator.io.ExcelExampleSource;
import com.rapidminer.tools.XMLException;
import java.io.File;
import java.io.IOException;
public class SOrapid {
public static void main(String[] args) {
try {
RapidMiner.setExecutionMode(RapidMiner.ExecutionMode.COMMAND_LINE);
RapidMiner.init();
Process process = new Process(new File("c:\\Users\\Matlab\\.RapidMiner5\\repositories\\Local Repository\\processes\\test.rmp"));
Operator op = process.getOperator("Read Excel");
op.setParameter(ExcelExampleSource.PARAMETER_EXCEL_FILE, "d:\\excel.xls");
process.run();
} catch (IOException | XMLException | OperatorException ex) {
ex.printStackTrace();
}
}
}
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