python脚本调用java类 java中调用python脚本

本文实例讲述了Java程序中实现调用Python脚本的方法。分享给大家供大家参考，具体如下：

在程序开发中，有时候需要Java程序中调用相关Python脚本，以下内容记录了先关步骤和可能出现问题的解决办法。

1、在Eclipse中新建Maven工程；

2、pom.xml文件中添加如下依赖包之后update maven工程；

org.python
jython
2.7.0
org.python
jython-standalone
2.7.0

3、编写如下测试代码；

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、测试：

出现如下错误：

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、问题解决：

重构代码如下：

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、编译成功。

7、解决问题参考：

补充：jpython抛错Cannot import site module的解决方法

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];");
}
// 进行复杂类接受处理
Map res = new HashMap();
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 tableM = new HashMap();
tableM.put(new PyString("conf"), PyJavaType.wrapJavaObject(res));
PyDictionary pydM = new PyDictionary(tableM);

希望本文所述对大家java程序设计有所帮助。