Java 使用扫描仪无限扫描 JSONObject 程序时出错

Question

我在编写这个程序时遇到了这个错误，我只想通过扫描器传递给 JSONobject 并打印 json 对象

但扫描仪进入无限循环

package com.readvalues.main;

import java.util.Scanner;
import net.sf.json.JSONObject;

public class ReadValues 
{
    public static void main(String[] args)
    {
        String x="";
        try 
        {   
            System.out.println("Enter the data");
            Scanner scanner = new Scanner(System.in);
            while(scanner.hasNext())
            {
                x = x + scanner.next();
            }

            JSONObject jsonObject = JSONObject.fromObject(x);
            System.out.println(jsonObject);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}

在终端中

Enter the data
{"ExecutiveGoal":
{"EMPLID":"100020","GOAL_ID":"GOAL-3-98372","GOAL":"Conduct EPC Contract Kaizen","DUE_DATE":"07/01/2018","STATUS":"On Track or Complete (Green)","CATEGORY":"Operational Goal","SUPPORTS_ORG_GOAL":"","COMPLETED_ON":"06/30/2018","CREATED_BY":"Mark Hensley","CREATED_ON":"03/01/2018","LAST_UPDATED_BY":"Mark Hensley","LAST_UPDATED_ON":"03/01/2018"
},
"ExecutiveGoal":
{"EMPLID":"100020","GOAL_ID":"GOAL-3-98373","GOAL":"Exit 2018 with minimum 5 negotiators trained and capable in O&M, MSAs, EPCs, and MIPSAs. At least 2 negotiators capable in PPAs.","DUE_DATE":"12/31/2018","STATUS":"On Track or Complete (Green)","CATEGORY":"People Leader Goal","SUPPORTS_ORG_GOAL":"","COMPLETED_ON":"","CREATED_BY":"Mark Hensley","CREATED_ON":"03/01/2018","LAST_UPDATED_BY":"Mark Hensley","LAST_UPDATED_ON":"03/01/2018"
}
}
//INFINITE LOOP SCANNING

我都试过了

Answer 1

扫描仪正在等待 int... scanner.nextLine() 会有帮助。

Answer 2

当您使用 scanner.nextInt() 时，它会等待整数值。您正在输入一个 json 字符串，这就是它抱怨的原因。您需要将其更改为需要字符串的 scanner.next() 。

而且你这样写的循环永远不会结束。它将要求您永远从输入中读取字符串。您可能会考虑一些 "exit" 条件 ;)

Java 使用扫描仪无限扫描 JSONObject 程序时出错

Java Error scanning JSONObject program using scanner scans infinitely

java

parsing

json

jsonparser