Java与Python之间使用jython工具类实现数据交互
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:
importjava.util.List;
importjava.util.Map;
importjava.util.Properties;
importorg.apache.poi.ss.formula.functions.T;
importorg.python.core.PyFunction;
importorg.python.core.PyInteger;
importorg.python.core.PyObject;
importorg.python.core.PyString;
importorg.python.util.PythonInterpreter;
/**
*@ClassName:JythonUtils
*@Description:TODO(jython工具类)
*@author:zy
*@date:
*
*@Copyright:2018Inc.Allrightsreserved.
*注意：
*/
publicclassJythonUtils{
/**
*@Title:jythonInit
*@Description:TODO(初始化jython)
*@param:@return
*@return:PythonInterpreter
*@throws
*/
publicstaticPythonInterpreterjythonInit(){
//初始化site配置
Propertiesprops=newProperties();
props.put("python.home","");//pythonLib或jythonLib,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");
Propertiespreprops=System.getProperties();
PythonInterpreter.initialize(preprops,props,newString[0]);
//创建PythonInterpreter对象
PythonInterpreterinterp=newPythonInterpreter();
returninterp;
}
/**
*@Title:loadPythonFile
*@Description:TODO(加载python源码文件，)
*@param:@paraminterp
*@param:@paramfilePath，比如：F:\\jpython_jar\\jpythonTest\\pythonTest.py或/testpython/test.py
*@param:@return
*@return:PythonInterpreter
*@throws
*/
publicstaticPythonInterpreterloadPythonFile(PythonInterpreterinterp,StringfilePath){
interp.execfile(filePath);
returninterp;
}
/**
*@Title:loadPythonFunc
*@Description:TODO(加载python源码文件中的某个方法)
*@param:@paraminterp
*@param:@paramfunctionName
*@param:@return
*@return:PyFunction
*@throws
*/
publicstaticPyFunctionloadPythonFunc(PythonInterpreterinterp,StringfunctionName){
//加载方法
PyFunctionfunc=(PyFunction)interp.get(functionName,PyFunction.class);
returnfunc;
}
/**
*@Title:execFunc
*@Description:TODO(执行无参方法,返回PyObject)
*@param:@paramfunc
*@return:PyObject
*@throws
*/
publicstaticPyObjectexecFunc(PyFunctionfunc){
PyObjectpyobj=func.__call__();
returnpyobj;
}
/**
*@Title:execFuncToString
*@Description:TODO(执行无参方法,返回一个字符串)
*@param:@paramfunc
*@param:@return
*@return:String
*@throws
*/
publicstaticStringexecFuncToString(PyFunctionfunc){
PyObjectpyobj=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:@paramfunc
*@param:@paramparamName，参数名
*@param:@return
*@return:String
*@throws
*/
publicstaticStringexecFuncToString2(PyFunctionfunc,StringparamName){
PyObjectpyobj=func.__call__(newPyString(paramName));
return(String)pyobj.__tojava__(String.class);
}
/**
*@Title:execFuncToInteger
*@Description:TODO(执行无参方法,返回一个Integer)
*@param:@paramfunc
*@param:@return
*@return:Integer
*@throws
*/
publicIntegerexecFuncToInteger(PyFunctionfunc){
PyObjectpyobj=execFunc(func);
return(Integer)pyobj.__tojava__(Integer.class);
}
/**
*@Title:execFuncToList
*@Description:TODO(执行无参方法,返回一个List)
*@param:@paramfunc
*@param:@return
*@return:List
*@throws
*/
publicListexecFuncToList(PyFunctionfunc){
PyObjectpyobj=execFunc(func);
return(List)pyobj.__tojava__(List.class);
}
/**
*@Title:execFuncToMap
*@Description:TODO(执行无参方法,返回一个Map)
*@param:@paramfunc
*@param:@return
*@return:Map
*@throws
*/
publicMapexecFuncToMap(PyFunctionfunc){
PyObjectpyobj=execFunc(func);
return(Map)pyobj.__tojava__(Map.class);
}
publicvoidexecFuncToByParamsList(PyFunctionfunc,ListparamsList){
}
publicstaticvoidmain(String[]args){
PythonInterpreterinterp=jythonInit();
//文件名
StringfilePath="F:\\jpython_jar\\jpythonTest\\pythonTest.py";
interp=loadPythonFile(interp,filePath);
//函数名
StringfunctionName="count";
PyFunctionfunc=loadPythonFunc(interp,functionName);
//执行无参方法，返回PyObject
PyObjectpyobj=execFunc(func);
//执行无参方法，返回String
StringresultStr=execFuncToString(func);
//执行有参方法，返回String
StringparamName="name";
StringresultStr2=execFuncToString2(func,paramName);
}
}
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