Java与Python之间使用jython工具类实现数据交互

Z时代
2024-01-10
分类：综合
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);
 }
}