JSON处理数据
js、java处理json数据方法
一：js处理json数据
处理办法之一是把本机json数据或远程返回json数据用eval函数，使之变成DOM对象。

例如：

var people = {

"programmers":[{"firstName":"Elie" , "lastName":"Harld" , "email": "elro@maq.com" }],
"authors":    [{"firstName":"Isac" , "lastName":"Asiov" , "genre": "science fiction" }],
"musicians":  [{"firstName":"Eric" , "lastName":"Claon" , "instrument": "guitar" },
               {"firstName":"Seei" , "lastName":"Rnoff" , "instrument": "piano" }]
};



二：Java处理json数据



var url = "parseJson.do?people=" + escape(people.toJSONString());



java 文件

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import net.sf.json.JSONObject;
import net.sf.json.JSONArray;
public class JsonAction extends Action {

@Override
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {


String param=request.getParameter("people");
JSONObject jsonObj=JSONObject.fromObject(param);



for (Iterator iter = jsonObj.keys(); iter.hasNext();) { //先遍历整个 people 对象
   String key = (String)iter.next();
   System.out.println(key);
   JSONArray array = jsonObj.getJSONArray(key);

 

   for (int i = 0; i < array.size(); i++) {   //再遍历整个三个属性(programmers,authors,musicians)的值(数组)

    JSONObject object = (JSONObject) array.get(i);

  

       for (Iterator iterator = object.keys(); iterator.hasNext();) { //最后遍历值中的每个属性
         String key2 = (String) iterator.next();
         System.out.print("    "+key2+" : "+object.get(key2));
       }


    System.out.println();
   }


   System.out.println();
  }



//最终输出如果如下：

programmers
    firstName : Elie    lastName : Harld    email : elro@maq.com

authors
    firstName : Isac    lastName : Asiov    genre : science fiction

musicians
    firstName : Eric    lastName : Claon    instrument : guitar
    firstName : Seei    lastName : Rnoff    instrument : piano

}