最近有个功能需要java与python之间的数据交互,java需要把参数传给python,然后python计算的结果返回给java.于是就写了一个工具类.

首先,maven 需要加载jython的依赖.工具类代码如下:

import java.util.List;import java.util.Map;import java.util.Properties;import org.apache.poi.ss.formula.functions.T;import org.python.core.PyFunction;import org.python.core.PyInteger;import org.python.core.PyObject;import org.python.core.PyString;import org.python.util.PythonInterpreter;/** * @ClassName: JythonUtils * @Description:TODO(jython 工具类) * @author: zy * @date: * * @Copyright: 2018 Inc. All rights reserved. * 注意： */public class JythonUtils { /** * @Title: jythonInit * @Description: TODO(初始化jython) * @param: @return * @return: PythonInterpreter * @throws */ public static PythonInterpreter jythonInit(){ //初始化site 配置 Properties props = new Properties(); props.put("python.home", ""); //python Lib 或 jython Lib,根据系统中该文件目录路径 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]); //创建PythonInterpreter 对象 PythonInterpreter interp = new PythonInterpreter(); return interp; } /** * @Title: loadPythonFile * @Description: TODO(加载python 源码文件，) * @param: @param interp * @param: @param filePath ，比如：F:\\jpython_jar\\jpythonTest\\pythonTest.py 或/testpython/test.py * @param: @return * @return: PythonInterpreter * @throws */ public static PythonInterpreter loadPythonFile(PythonInterpreter interp, String filePath){ interp.execfile(filePath); return interp; } /** * @Title: loadPythonFunc * @Description: TODO(加载python 源码文件中的某个方法) * @param: @param interp * @param: @param functionName * @param: @return * @return: PyFunction * @throws */ public static PyFunction loadPythonFunc(PythonInterpreter interp, String functionName){ //加载方法 PyFunction func = (PyFunction) interp.get(functionName,PyFunction.class); return func; } /** * @Title: execFunc * @Description: TODO(执行无参方法,返回PyObject) * @param: @param func * @return: PyObject * @throws */ public static PyObject execFunc(PyFunction func){ PyObject pyobj = func.__call__(); return pyobj; } /** * @Title: execFuncToString * @Description: TODO(执行无参方法,返回一个字符串) * @param: @param func * @param: @return * @return: String * @throws */ public static String execFuncToString(PyFunction func){ PyObject pyobj = execFunc(func); return (String) pyobj.__tojava__(String.class); } /** * @Title: execFuncToString * @Description: TODO(执行有参方法,返回一个字符串) * @param: @param func * @param: @param paramName ，参数名 * @param: @return * @return: String * @throws */ public static String execFuncToString2(PyFunction func, String paramName){ PyObject pyobj = func.__call__(new PyString(paramName)); return (String) pyobj.__tojava__(String.class); } /** * @Title: execFuncToInteger * @Description: TODO(执行无参方法,返回一个Integer) * @param: @param func * @param: @return * @return: Integer * @throws */ public Integer execFuncToInteger(PyFunction func){ PyObject pyobj = execFunc(func); return (Integer) pyobj.__tojava__(Integer.class); } /** * @Title: execFuncToList * @Description: TODO(执行无参方法,返回一个List) * @param: @param func * @param: @return * @return: List<T> * @throws */ public List<T> execFuncToList(PyFunction func){ PyObject pyobj = execFunc(func); return (List<T>) pyobj.__tojava__(List.class); } /** * @Title: execFuncToMap * @Description: TODO(执行无参方法,返回一个Map<String, Object>) * @param: @param func * @param: @return * @return: Map<String,Object> * @throws */ public Map<String, Object> execFuncToMap(PyFunction func){ PyObject pyobj = execFunc(func); return (Map<String, Object>) pyobj.__tojava__(Map.class); } public void execFuncToByParamsList(PyFunction func, List<T> paramsList){ } public static void main(String[] args){ PythonInterpreter interp = jythonInit(); //文件名 String filePath = "F:\\jpython_jar\\jpythonTest\\pythonTest.py"; interp = loadPythonFile(interp, filePath); //函数名 String functionName = "count"; PyFunction func = loadPythonFunc(interp, functionName); //执行无参方法，返回PyObject PyObject pyobj = execFunc(func); //执行无参方法，返回String String resultStr = execFuncToString(func); //执行有参方法，返回String String paramName = "name"; String resultStr2 = execFuncToString2(func, paramName); }}

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，谢谢大家对的支持。如果你想了解更多相关内容请查看下面相关链接