Java程序中实现调用Python脚本的方法详解

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；

<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、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<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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希望本文所述对大家java程序设计有所帮助。