最近有個功能需要java與python之間的數據交互,java需要把參數傳給python,然后python計算的結果返回給java.于是就寫了一個工具類.
首先,maven 需要加載jython的依賴.工具類代碼如下:
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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 工具類) * @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,根據系統中該文件目錄路徑 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]); //創建pythoninterpreter 對象 pythoninterpreter interp = new pythoninterpreter(); return interp; } /** * @title: loadpythonfile * @description: todo(加載python 源碼文件，) * @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(加載python 源碼文件中的某個方法) * @param: @param interp * @param: @param functionname * @param: @return * @return: pyfunction * @throws */ public static pyfunction loadpythonfunc(pythoninterpreter interp, string functionname){ //加載方法 pyfunction func = (pyfunction) interp.get(functionname,pyfunction.class); return func; } /** * @title: execfunc * @description: todo(執行無參方法,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(執行無參方法,返回一個字符串) * @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(執行有參方法,返回一個字符串) * @param: @param func * @param: @param paramname ，參數名 * @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(執行無參方法,返回一個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(執行無參方法,返回一個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(執行無參方法,返回一個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); //函數名 string functionname = "count"; pyfunction func = loadpythonfunc(interp, functionname); //執行無參方法，返回pyobject pyobject pyobj = execfunc(func); //執行無參方法，返回string string resultstr = execfunctostring(func); //執行有參方法，返回string string paramname = "name"; string resultstr2 = execfunctostring2(func, paramname); }} |
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原文鏈接：https://blog.csdn.net/cafebar123/article/details/79394431
