java 字符串到json的转换问题
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String to json conversion issue
提问by pars
I am trying to convert a string to JSONObjectobject using the below code,but i am getting
我正在尝试JSONObject使用以下代码将字符串转换为对象，但我得到了
Exception in thread "main" java.lang.ClassCastException:
org.json.simple.JSONObject cannot be cast to net.sf.json.JSONObject .
Source:
来源：
import net.sf.json.JSONObject;
import org.json.simple.parser.JSONParser;
public static void run(JSONObject jsonObject) {
System.out.println("in run--");
}
public static void main(String[] args) throws Exception {
System.out.println("here");
String json = "{\"task\": \"com.ge.dbt.workers.surveytoexcel.worker.SurveyWorker\",\"prod_id\": 12345,\"survey_id\": 5666,\"person_id\": 18576567,\"req_date\": \"1212\"}";
JSONObject jsonObj;
JSONParser parser = new JSONParser();
Object obj = parser.parse(json);
jsonObj = (JSONObject) obj;
run(jsonObj);
}
What is wrong here?
这里有什么问题？
采纳答案by David Grant
You've imported JSONObjectfrom the wrong package. Change this line:
您JSONObject从错误的包中导入。改变这一行：
import net.sf.json.JSONObject;
to this:
对此：
import org.json.simple.JSONObject;
回答by Nokia808Freak
Implementing the following solution, You don't even have to bother about a parser...
实施以下解决方案，您甚至不必担心解析器......
The Problem here is that u're trying to cast a object of type org.json.simple.JSONObjectto net.sf.json.JSONObject. You might wanna try The package org.codehaus.jettison.json.JSONObject. that is enough to do all the required things.
这里的问题是你试图将一个类型的对象强制转换org.json.simple.JSONObject为net.sf.json.JSONObject. 你可能想试试 The package org.codehaus.jettison.json.JSONObject。这足以做所有需要的事情。
Simple Example:
简单示例：
First, Prepare a String:
首先，准备一个字符串：
String jStr = "{\"name\":\"Fred\",\"Age\":27}";
String jStr = "{\"name\":\"Fred\",\"Age\":27}";
Now, to parse the StringObject, U just have to pass the String to the JSONObject();constructor method
现在，要解析String对象，您只需将字符串传递给JSONObject();构造函数方法
JSONObject jObj = new JSONObject(jStr);
JSONObject jObj = new JSONObject(jStr);
That should do it and voila! You have a JSONObject. Now you can play with it as u please.
那应该这样做，瞧！你有一个 JSONObject。现在你可以随意玩了。
How So Simple ain't it?
多么简单，不是吗？
The Modified version of the Code might look like:
代码的修改版本可能如下所示：
import net.sf.json.JSONObject;
import net.sf.json.JSONObject;
import org.codehaus.jettison.json.JSONObject;
public static void run(JSONObject jsonObject) {
System.out.println("in run-- "+jsonObject.getInt("person_id"));
}
public static void main(String[] args) throws Exception {
System.out.println("here");
String json = "{\"task\": \"com.ge.dbt.workers.surveytoexcel.worker.SurveyWorker\",\"prod_id\": 12345,\"survey_id\": 5666,\"person_id\": 18576567,\"req_date\": \"1212\"}";
JSONObject jsonObj = new JSONObject(json);
run(jsonObj);
}
with JSON, It's SssOooooooo simple
使用 JSON，SssOoooooooo 很简单
