Question

我正在使用Jython将字符串值传递给python脚本。在我的程序中，我做了几次。但是，在测试期间，我正在运行以查看发送参数的类是否正常运行，我发现python脚本输出的字符串值与初始输入相同。

这是Java类：

public class SendToCal
{


PythonInterpreter interp  = null;
StringWriter clout = null;
String [] arguments = null;

private String start=null,end=null,subject = null;
Properties props = new Properties();


public SendToCal(String start,String end, String subject) 
{
    try{

    setInputs(start,end,subject);
    arguments = getInputs(start,end,subject);
    //---------------------------------------------
    //---------------trying out jython test--------
    props.setProperty("python.path","C:\\folder\\where\\I\\have\\stuff\\2.7-b1\\Lib', '__classpath__', '__pyclasspath__/");
    PythonInterpreter.initialize(System.getProperties(), props,arguments);


    this.interp = new PythonInterpreter();

    clout = new StringWriter();

    interp.setOut(clout);
    interp.execfile("C:\\folder\\to\\file\\pyscript.py");


    String outputStr = clout.toString();

    System.out.println(outputStr);
    clout.close();
    }catch(IOException ex)
    {
        ex.printStackTrace();
    }



}
 public void setInputs(String start, String end, String sub)
{
    this.start = start;
    this.end = end;
    this.subject = sub;

}

public String[] getInputs(String start, String end, String sub)
{
    String [] arr = {this.start,this.end,this.subject};

   return arr;

}


public  static void main(String[] args) throws InterruptedException
{

    String st2 = 2018+"-"+ 8 +"-"+ 6+ " " +"12:00";
    String en2 = 2018+"-"+ 8 +"-"+ 6+ " " +"11:59";
    String su2 = "YAY PYTHON AGAIN!!";
    new SendToCal(st2, en2, su2);

    TimeUnit.SECONDS.sleep(1);


    String st = 1999+"-"+ 7 +"-"+ 17+ " " +"12:00";
    String en = 1999+"-"+ 7 +"-"+ 17+ " " +"11:59";
    String su = "YAY PYTHON!!";
    new SendToCal(st, en, su);


 }
}

此外，以下是我的python脚本：

import sys
def pyscript(arg1,arg2,arg3):
    print ("calling python function with parameters:")
    print arg1
    print arg2
    print arg3

pyscript(sys.argv[0],sys.argv[1],sys.argv[2])

我的问题是，当我使用两个或更多个完全不同的字符串数组调用Java构造函数时，python的输出与第一个数组输入的重复。任何帮助表示赞赏。

我得到以下输出：

calling python function with parameters:
2018-8-6 12:00
2018-8-6 11:59
YAY PYTHON AGAIN!!

calling python function with parameters:
2018-8-6 12:00
2018-8-6 11:59
YAY PYTHON AGAIN!!

我希望：

calling python function with parameters:
2018-8-6 12:00
2018-8-6 11:59
YAY PYTHON AGAIN!!

calling python function with parameters:
1999-7-17 12:00
1999-7-17 11:59
YAY PYTHON AGAIN!!

Answer 1

PythonInterpreter.initialize()方法仅应调用一次。在您的程序中两次调用它，第二次type <- paste("type", c(1,1,1,2,3,1,2,2,3,3,3,3,1,1)) dates <- seq(as.Date("2000/1/1"), by = "days", length.out = length(type)) mydataframe <- data.frame(type, dates) library(dplyr) mydataframe %>% count(type, group = cumsum(type != lag(type, default = first(type)))) %>% group_by(type) %>% summarise(Avg = mean(n)) # # A tibble: 3 x 2 # type Avg # <fct> <dbl> # 1 type 1 2 # 2 type 2 1.5 # 3 type 3 2.5未更新。

一种解决方法是使用pyscript.py作为模块并调用模块中定义的函数。

将sys.argv替换为以下内容：

interp.execfile("pyscript.py");

使用Jython将参数从Java传递到Python

1 个答案: