Java程序中實現調用Python腳本的方法詳解

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後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];"); }

 // 進行複雜類接受處理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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