本文實例講述了Java程序中實現調用Python腳本的方法。分享給大家供大家參考，具體如下：
在程序開發中，有時候需要Java程序中調用相關Python腳本，以下內容記錄了先關步驟和可能出現問題的解決辦法。
1、在Eclipse中新建Maven工程；
2、pom.xml文件中添加如下依賴包之后update maven工程；
|
1
2
3
4
5
6
7
8
9
10
|
<dependency> <groupId>org.python</groupId> <artifactId>jython</artifactId> <version>2.7.0</version></dependency><dependency> <groupId>org.python</groupId> <artifactId>jython-standalone</artifactId> <version>2.7.0</version></dependency> |
3、編寫如下測試代碼；
|
1
2
3
4
5
6
7
8
|
import org.python.util.PythonInterpreter;public class JpythonScript { public static void main(String args[]) { PythonInterpreter interpreter = new PythonInterpreter(); interpreter.exec("days=('mod','Tue','Wed','Thu','Fri','Sat','Sun'); "); interpreter.exec("print days[1];"); }} |
4、測試：
出現如下錯誤：
console: Failed to install '': java.nio.charset.UnsupportedCharsetException: cp0.
Exception in thread "main" ImportError: Cannot import site module and its dependencies: No module named site
Determine if the following attributes are correct:
* sys.path: ['...python\\jython\\2.7.0\\Lib', '__classpath__', '__pyclasspath__/']
This attribute might be including the wrong directories, such as from CPython
* sys.prefix:***\jython\2.7.0
This attribute is set by the system property python.home, although it can
be often automatically determined by the location of the Jython jar file
You can use the -S option or python.import.site=false to not import the site module
5、問題解決：
重構代碼如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
import java.util.Properties;import org.python.util.PythonInterpreter;public class JpythonScript { public static void main(String args[]) { Properties props = new Properties(); props.put("python.home", "path to the Lib folder"); props.put("python.console.encoding", "UTF-8"); props.put("python.security.respectJavaAccessibility", "false"); props.put("python.import.site", "false"); Properties preprops = System.getProperties(); PythonInterpreter.initialize(preprops, props, new String[0]); PythonInterpreter interpreter = new PythonInterpreter(); interpreter.exec("days=('mod','Tue','Wed','Thu','Fri','Sat','Sun'); "); interpreter.exec("print days[1];"); }} |
6、編譯成功。
7、解決問題參考：
http://bugs.jython.org/issue2355
補充：jpython拋錯Cannot import site module的解決方法
Exception in thread "main" ImportError: Cannot import site module and its dependencies: No module named site
|
1
2
3
4
5
6
7
8
9
10
|
public class JpythonScript { public static void main(String args[]) { Properties props = new Properties(); props.put("python.import.site", "false"); Properties preprops = System.getProperties(); PythonInterpreter.initialize(preprops, props, new String[0]); PythonInterpreter interpreter = new PythonInterpreter(); interpreter.exec("days=('mod','Tue','Wed','Thu','Fri','Sat','Sun'); "); interpreter.exec("print days[1];"); } |
|
1
2
3
4
5
6
7
8
9
10
|
// 進行復雜類接受處理Map<String, Object> res = new HashMap<String, Object>();res.put("1", "Danny");res.put("2", "Fanny");PythonInterpreter interpM = new PythonInterpreter();interpM.execfile("./src/com/DataDeal.py");PyFunction pyFunctionM = (PyFunction) interpM.get("main", PyFunction.class);Map<PyObject, PyObject> tableM = new HashMap<PyObject, PyObject>();tableM.put(new PyString("conf"), PyJavaType.wrapJavaObject(res));PyDictionary pydM = new PyDictionary(tableM); |
希望本文所述對大家java程序設計有所幫助。
原文鏈接：http://www.cnblogs.com/liinux/p/5481849.html
