java调用python脚本，json传参方式。

古城微笑少年丶 2023-10-13 12:28 25阅读 0赞

使用python的json.loads()进行解析json数据，如果没有包含双引号，则会解析出错

## 解决方案1 ##

使用demjson.decode()，安装方式直接百度，就不做过多的说明了

## 解决方案2 ##

### 使用json.loads（）方式解析，下面是我的python代码 ###

import json
    import sys
    
    def analysis():
        data2 = json.loads(sys.argv[1])["param"]
        for data in data2:
            print("vce: %s, tj: %s, tcc: %s."%(data["vce"],data["tj"],data["tcc"]))
    
    if __name__ == '__main__':
         analysis()

### 使用Jackson的ObjectMapper类, 使用objectMapper.writeValueAsString(params).replace(“”“, “\\””); ###

下面是我的调用代码

public static void main(String[] args) throws FileNotFoundException {
        
    //        File file = new File("E:\\workplace_module\\DataAnalysisProject\\src\\main\\resources\\xlsx\\电容老化数据.xlsx");
    //        List<DianRongCAndESR> dianRongCAndESRS =  DianRongAnalysis(2,new FileInputStream(file));
    //        System.out.println(dianRongCAndESRS);
    
            File file = new File("E:\\workplace_module\\DataAnalysisProject\\src\\main\\resources\\xlsx\\IGBT老化数据.xlsx");
            List<IGBTExcelParams> dianRongCAndESRS =  IGBTAnalysis(new FileInputStream(file));
            AnalysisVo<IGBTExcelParams> vo = new AnalysisVo();
            vo.setParam(dianRongCAndESRS);
            ObjectMapper objectMapper = new ObjectMapper();
            Process proc;
            try {
        
                String json = objectMapper.writeValueAsString(vo).replace("\"", "\\\"");
                String[] cmdarray = new String[]{
        "python", "C:\\Users\\test1\\PycharmProjects\\pythonProject1\\test.py", json};
                ProcessBuilder pb = new ProcessBuilder(cmdarray);
                proc = pb.start();
                BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream(), "UTF-8"));
                String line = null;
                while ((line = in.readLine()) != null) {
        
                    System.out.println(line);
                }
                in.close();
                proc.waitFor();
            } catch (IOException e) {
        
                e.printStackTrace();
            } catch (InterruptedException e) {
        
                e.printStackTrace();
            }
        }

## 运行结果 ##

是能够获取到python打印的结果  
![在这里插入图片描述][031100d6986f44dea51bba0807df90e3.png]

[031100d6986f44dea51bba0807df90e3.png]: https://img-blog.csdnimg.cn/031100d6986f44dea51bba0807df90e3.png