Question

我试图从json对象解析数组列表，如下面的代码，

File file = new File(HomePage.jsonFilePath);
        if(file.exists()) {
            JSONParser parser = new JSONParser();
            try {
                Object obj = parser.parse(new FileReader(file));
                JSONObject jsonObject = (JSONObject) obj;
                System.out.println("Customer json for config customer "+jsonObject.toString());
                configuredBranch = (String) jsonObject.get("branch");
                configuredSystem = (String) jsonObject.get("system");
                expinContainerPath = (String) jsonObject.get("path");
                if(isEditable) {
                    try {
                        JSONArray customerArray = (JSONArray) jsonObject.get("customer_list");
                        if(customerArray!=null && customerArray.size()>0) {
                            Iterator<String> iterator = customerArray.iterator();
                            while (iterator.hasNext()) {
                                System.out.println("customer gson"+iterator.next());
                                customerList.add(iterator.next());
                            }
                        }
                    }catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (ParseException e) {
                e.printStackTrace();
            }
        }

执行此行时，控制台显示以下json System.out.println（＆＃34;客户json用于配置客户＆＃34; + jsonObject.toString（））;

{"path":"C:\\Users\\Documents","system":"Exp","customer_list":["test","test1"],"branch":"LRD"}

但是在迭代和打印时如下 System.out.println（＆＃34; customer gson＆＃34; + iterator.next（））; 它始终打印测试，即customer_list中的第一项。我想在＆＃34; customer_list＆＃34;中显示所有项目。你能建议我这么做吗？提前致谢。

Answer 1

您在next()循环内调用迭代器的while方法两次，而只调用它一次。所以，重写你的代码：

while (iterator.hasNext()) {
    String customer = iterator.next();
    System.out.println("Customer " + customer);
    customerList.add(customer);
}

从Json对象解析Json数组仅显示列表Java中的第一项

1 个答案: