Java calls Jython

 

The Python script needs to be called in the Java JVM process during the past two days. The script language is really awkward when I got down to Jython trainer. I used Python a few years ago when I wrote an automated testing tool, but I forgot about it. Okay, go straight to the topic.

Prerequisites:

Sun-jre1.6, Jython 2.5

2. In the next jython_installer-2.5.0.jar under the official website, all the way to next, in/Jython-install-path/There Is A Jython. jar, the Jython. Jar import into the Java project.

Python code: fibo. py

 # Fibonacci numbers moduledef fib(n):    # write Fibonacci series up to n    a, b = 0, 1    while b < n:        print b,        a, b = b, a+bdef fib2(n): # return Fibonacci series up to n    result = []    a, b = 0, 1    while b < n:        result.append(b)        a, b = b, a+b    return result

Java code: testjython. Java

Import Org. python. core. pyexception; import Org. python. core. pyfile; import Org. python. core. pyobject; import Org. python. core. pystring; import Org. python. util. pythoninterpreter; public class testjython {/*** pay attention to the following aspects of Jython: * 1. how to import a Jython module from a specified path? * 2. How to call the methods in the module? * 3. How should I transmit parameters between Java and Jython? ** @ Param ARGs * @ throws pyexception */public static void main (string [] ARGs) throws pyexception {pythoninterpreter interp = new pythoninterpreter (); // 1. // introduce the system module and set [. /pythonsrc] is added to the module search path. Interp.exe C ("Import sys"); interp.exe C ("sys. path. append ('. /pythonsrc ') "); // 2. introduce the fibo and execute the fibo. FIB (100), OK interp.exe C ("Import fiber"); interp.exe C ("fiber. FIB (100) "); // 3. obtain the python built-in variable values in the Java program. String text = "'This is a bad Day'"; interp.exe C ("x =" + TEXT + "+ '!!! '"); Interp.exe C (" Print X "); pyobject object = interp. get ("X"); pystring xstring = object. _ STR _ (); string outx = xstring. asstring (); interp.exe C ("_ file = open ('/home/Fore/work/oaassearch/search/oaas_search/workspace/oaas-search0.1/pythonsrc/fibo. PY ') "); object = interp. get ("_ file"); pyfile file = (pyfile) object; pystring content = file. read (100); system. out. println (content); interp.exe C ("array = _ file. read (100) "); String Array = interp. get ("array "). asstring (); system. out. println (array); interp.exe C ("_ file. close () "); file. close ();}}

In this way, the call can be completed, and the Code has not been fully tested. After the test is passed, further adjustments will be made!