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這篇文章將為大家詳細講解有關Java程序中怎么實現調用Python腳本,小編覺得挺實用的,因此分享給大家做個參考,希望大家閱讀完這篇文章后可以有所收獲。
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;
<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;
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:
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
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];"); }
// 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);
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