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Java程序中實(shí)現(xiàn)調(diào)用Python腳本的方法詳解

更新時(shí)間：2018年03月29日 10:55:04 作者：EliteQing

這篇文章主要介紹了Java程序中實(shí)現(xiàn)調(diào)用Python腳本的方法,結(jié)合實(shí)例形式分析了eclipse環(huán)境中使用Java調(diào)用Python腳本的相關(guān)操作技巧與注意事項(xiàng),需要的朋友可以參考下

本文實(shí)例講述了Java程序中實(shí)現(xiàn)調(diào)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(fā)中，有時(shí)候需要Java程序中調(diào)用相關(guān)Python腳本，以下內(nèi)容記錄了先關(guān)步驟和可能出現(xiàn)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(xiàn)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(gòu)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(bǔ)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(jìn)行復(fù)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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