通过传递参数和结果从Java调用Python代码 [英] Call Python code from Java by passing parameters and results

问题描述

任何人都可以通过传递参数并获取结果来向我展示一个从java代码调用python脚本的简单示例（java + python代码）吗？

Can anyone show me a working simple example (java + python code) of calling python script from java code by passing parameters and getting back the results?

推荐答案

尝试使用Java ScriptEngine 将代码作为Jython运行。

Try using Java ScriptEngine to run the code as Jython.

示例程序：

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Main {

     /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws ScriptException {
        ScriptEngine engine = new ScriptEngineManager().getEngineByName("python");

        // Using the eval() method on the engine causes a direct
        // interpretataion and execution of the code string passed into it
        engine.eval("import sys");
        engine.eval("print sys");

        // Using the put() method allows one to place values into
        // specified variables within the engine
        engine.put("a", "42");

        // As you can see, once the variable has been set with
        // a value by using the put() method, we an issue eval statements
        // to use it.
        engine.eval("print a");
        engine.eval("x = 2 + 2");

        // Using the get() method allows one to obtain the value
        // of a specified variable from the engine instance
        Object x = engine.get("x");
        System.out.println("x: " + x);
    }

}

你需要包括你的类路径中的jython引擎jar。寻找它这里

You'll need to include the jython engine jar in your classpath. look for it here

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