用java解析json字符串问题

daishunchaoaiqiu 2012-02-08 10:49:40

{"weatherinfo":{"city":"北京","cityid":"101010100","temp1":"-8℃","temp2":"4℃","weather":"晴","img1":"n0.gif","img2":"d0.gif","ptime":"18:00"}}

请问这个怎么解析呢？

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z1313586 2014-09-06

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Exception in thread "main" java.lang.Error: Unresolved compilation problem: 是怎么回事呢

zuxianghuang 2014-08-13

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http://json-lib.sourceforge.net/ 我用的json-lib-jdk1.5

引用 11 楼 zidiancao 的回复:

哪个包啊？ [quote=引用 8 楼 ZuxiangHuang 的回复:] import net.sf.json.JSONArray; import net.sf.json.JSONObject;


 public void getJSONObject(){
        JSONObject node = JSONObject.fromObject("{'weatherinfo':{'city':'北京','cityid':'101010100','temp1':'-8℃','temp2':'4℃','weather':'晴','img1':'n0'}}");
        List<Object>  nodes = new ArrayList<Object>();
   
        JSONArray jsons = JSONArray.fromObject(node.get("weatherinfo"));
        
        for (Object o : jsons)
        {
            JSONObject jsonNode = JSONObject.fromObject(o);
            List<Object> treeNodes = new ArrayList<Object>();
            treeNodes.add(jsonNode.getString("city"));
            treeNodes.add(jsonNode.getString("cityid"));
            treeNodes.add(jsonNode.getString("temp1"));
            treeNodes.add(jsonNode.getString("temp2"));
            //...
            nodes.add(treeNodes);
        }
    
    System.out.println(nodes);
    }

[/quote]

zidiancao 2014-08-13

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哪个包啊？

引用 8 楼 ZuxiangHuang 的回复:

import net.sf.json.JSONArray; import net.sf.json.JSONObject;


 public void getJSONObject(){
        JSONObject node = JSONObject.fromObject("{'weatherinfo':{'city':'北京','cityid':'101010100','temp1':'-8℃','temp2':'4℃','weather':'晴','img1':'n0'}}");
        List<Object>  nodes = new ArrayList<Object>();
   
        JSONArray jsons = JSONArray.fromObject(node.get("weatherinfo"));
        
        for (Object o : jsons)
        {
            JSONObject jsonNode = JSONObject.fromObject(o);
            List<Object> treeNodes = new ArrayList<Object>();
            treeNodes.add(jsonNode.getString("city"));
            treeNodes.add(jsonNode.getString("cityid"));
            treeNodes.add(jsonNode.getString("temp1"));
            treeNodes.add(jsonNode.getString("temp2"));
            //...
            nodes.add(treeNodes);
        }
    
    System.out.println(nodes);
    }

zhangxiaoyan06 2012-02-09

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也可以使用json-simple的各种解析
示例和jar下载地址如下：
http://code.google.com/p/json-simple/downloads/list

demohunter 2012-02-09

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如果你想要得到里面的信息的话可以先在前台用json解析把它封装到Weatherinfo这个对象里面再把Weatherinfo传到后台不就得了嘛干嘛非要用java解析json呢

zuxianghuang 2012-02-09

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import net.sf.json.JSONArray;
import net.sf.json.JSONObject;



 public void getJSONObject(){

        JSONObject node = JSONObject.fromObject("{'weatherinfo':{'city':'北京','cityid':'101010100','temp1':'-8℃','temp2':'4℃','weather':'晴','img1':'n0'}}");

        List<Object>  nodes = new ArrayList<Object>();

   

        JSONArray jsons = JSONArray.fromObject(node.get("weatherinfo"));

        

        for (Object o : jsons)

        {

            JSONObject jsonNode = JSONObject.fromObject(o);

            List<Object> treeNodes = new ArrayList<Object>();

            treeNodes.add(jsonNode.getString("city"));

            treeNodes.add(jsonNode.getString("cityid"));

            treeNodes.add(jsonNode.getString("temp1"));

            treeNodes.add(jsonNode.getString("temp2"));

            //...

            nodes.add(treeNodes);

        }

    

    System.out.println(nodes);

    }

c1star 2012-02-09

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JSONObject jsonObj = (JSONObject)jParser.parse("楼主的字符串");
Object obj = jsonObj .get ("weatherinfo");
JSONObject subObj = (JSONObject)obj ;
String city= (String)subObj .get("city");