Calling the Python method in Java

1, http://sourceforge.net/projects/jython/Download the Jython package, add the Jython.jar to the project directory

Example:

1. Excerpt from: http://blog.csdn.net/anbo724/article/details/6608632

1. Execute python statements directly in the Java class

2. Import javax.script.*;
6. Import Org.python.util.PythonInterpreter;
10. Import java.io.*;
12. Import static java.lang.system.*;
14. public class Firstjavascript
16. {
18. public static void Main (String args[])
20. {
24. Pythoninterpreter interpreter = new Pythoninterpreter ();
26. Interpreter.exec ("days=" (' MoD ', ' Tue ', ' Wed ', ' Thu ', ' Fri ', ' Sat ', ' Sun ');
28. Interpreter.exec ("Print days[1];");
34. }//main
36. }

The result is Tue, which is displayed in the console, which is called directly.

2. Call the functions in the native Python script in Java:

First, create a python script named: my_utils.py

1. def adder (A, b):
2. return a + b

Then build a Java class that you can use to test,

Java Class Code Firstjavascript:

2. import javax.script.*;
4.   
6. import org.python.core.PyFunction;
8. import Org.python.core.PyInteger;
10. import Org.python.core.PyObject;
12. import Org.python.util.PythonInterpreter;
14.   
16. import java.io.*;
18. import static java.lang.system.*;
20. Public class Firstjavascript
22. {  
24. Public static void Main (String args[])
26.     {  
28.           
30. Pythoninterpreter interpreter = new Pythoninterpreter ();
32. interpreter.execfile ("c:\\python27\\programs\\my_utils.py");
34. pyfunction func = (pyfunction) interpreter.get ("Adder", Pyfunction.class);
36.   
38. int a =, b = 2;
40. Pyobject pyobj = func.__call__ (New Pyinteger (a), new Pyinteger (b));
42. System.out.println ("anwser =" + pyobj.tostring ());
44.   
46.   
48. }//main
50. }  

The resulting result is: Anwser = 2012

3. Execute the Python script directly using Java,

Create a script inputpy

1. #open Files
2.   
3. print ' Hello '
4. number=[3,5,2,0,6]
5. Print number
6. Number.sort ()
7. Print number
8. number.append (0)
9. Print number
10. print number.count (0)
11. Print Number.index (5)

To create a Java class, call this script:

2. import javax.script.*;
4.   
6. import org.python.core.PyFunction;
8. import Org.python.core.PyInteger;
10. import Org.python.core.PyObject;
12. import Org.python.util.PythonInterpreter;
14.   
16. import java.io.*;
18. import static java.lang.system.*;
20. Public class Firstjavascript
22. {  
24. Public static void Main (String args[])
26.  {  
28.     
30. Pythoninterpreter interpreter = new Pythoninterpreter ();
32. interpreter.execfile ("c:\\python27\\programs\\input.py");
34. }//main
36. }  

The resulting results are:

1. Hello
2. [3, 5, 2, 0, 6]
3. [0, 2, 3, 5, 6]
4. [0, 2, 3, 5, 6, 0]
5. 2
6. 3

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Calling the Python method in Java