如何解析json中map数据

Posted 2023-04-28

参考技术A import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONStringer;
import org.json.JSONTokener;
import cc.util.android.core.LogUtil;
import android.util.Log;

/**
* 解析多层次Json字符串,封装多层Json，避免字符串中有特殊字符而出现的错误
* @author wangcccong
* @version 1.140122
* create at： Fri, 13 Jun 2014
* update at: Mon, 1 Sep 2014
*/
public class JsonUtil

private final static String regex = "\"([^\\\" ]+?)\":";

/**
* 一个方法解析多层json数据 json + 正则 + 递归
* @see @link java.util.regex.Matcher, @link java.util.regex.Pattern
* @param jsonStr
* @return @link java.util.Map or @link java.util.List or @link java.lang.String
*/
public static Object jsonParse(final String jsonStr)
if (jsonStr == null) throw new NullPointerException("JsonString shouldn't be null");
try
if (isJsonObject(jsonStr))
final Pattern pattern = Pattern.compile(regex);
final Matcher matcher = pattern.matcher(jsonStr);
final Map<String, Object> map = new HashMap<String, Object>();
final JSONObject jsonObject = new JSONObject(jsonStr);
try
for (; matcher.find(); )
String groupName = matcher.group(1);
Object obj = jsonObject.opt(groupName);
//Log.e(groupName, obj+"");
if (isJsonObject(obj+"") || isJsonArray(obj+""))
matcher.region(matcher.end() + (obj+"").replace("\\", "").length(), matcher.regionEnd());
map.put(groupName, jsonParse(obj+""));
else
map.put(groupName, obj+"");


catch (Exception e)
// TODO: handle exception
Log.e("object---error", e.getMessage()+"--"+e.getLocalizedMessage());


return map;
else if (isJsonArray(jsonStr))
List<Object> list = new ArrayList<Object>();
try
JSONArray jsonArray = new JSONArray(jsonStr);
for (int i = 0; i < jsonArray.length(); i++)
Object object = jsonArray.opt(i);
list.add(jsonParse(object+""));

catch (Exception e)
// TODO: handle exception
Log.e("array---error", e.getMessage()+"--"+e.getLocalizedMessage());

return list;

catch (Exception e)
// TODO: handle exception
Log.e("RegexUtil--regexJson", e.getMessage()+"");

return jsonStr;


/**
* To determine whether a string is JsonObject @link org.json.JSONObject
* @param jsonStr @link java.lang.String
* @return boolean
*/
private static boolean isJsonObject(final String jsonStr)
if (jsonStr == null) return false;
return Pattern.matches("^\\.*\\$", jsonStr.trim());


/**
* To determine whether a string is JsonArray @link org.json.JSONArray;
* @param jsonStr @link java.lang.String
* @return boolean
*/
private static boolean isJsonArray(final String jsonStr)
if (jsonStr == null) return false;
return Pattern.matches("^\\[.*\\]$", jsonStr.trim());


/**
* 将对象分装为json字符串 (json + 递归)
* @param obj 参数应为@link java.util.Map 或者 @link java.util.List
* @return
*/
@SuppressWarnings("unchecked")
public static www.hnnedu.com Object jsonEnclose(Object obj)
try
if (obj instanceof Map) //如果是Map则转换为JsonObject
Map<String, Object> map = (Map<String, Object>)obj;
Iterator<Entry<String, Object>> iterator = map.entrySet().iterator();
JSONStringer jsonStringer = new JSONStringer().object();
while (iterator.hasNext())
Entry<String, Object> entry = iterator.next();
jsonStringer.key(entry.getKey()).value(jsonEnclose(entry.getValue()));

JSONObject jsonObject = new JSONObject(new JSONTokener(jsonStringer.endObject().toString()));
return jsonObject;
else if (obj instanceof List) //如果是List则转换为JsonArray
List<Object> list = (List<Object>)obj;
JSONStringer jsonStringer = new JSONStringer().array();
for (int i = 0; i < list.size(); i++)
jsonStringer.value(jsonEnclose(list.get(i)));

JSONArray jsonArray = new JSONArray(new JSONTokener(jsonStringer.endArray().toString()));
return jsonArray;
else
return obj;

catch (Exception e)
// TODO: handle exception
LogUtil.e("jsonUtil--Enclose", e.getMessage());
return e.getMessage();





//解析时使用示例
Object object = JsonUtil.jsonParse(RegexPolicy.Json, jsonStr.substring(jsonStr.indexOf(""),
jsonStr.lastIndexOf("")+1));
if (object instanceof String)
Log.e("string", object.toString());
else if (object instanceof Map)
@SuppressWarnings("unchecked")
HashMap<String, Object> map = (HashMap<String, Object>)object;
Iterator<Entry<String, Object>> iterator = map.entrySet().iterator();
while (iterator.hasNext())
Entry<String, Object> entry = iterator.next();
if (entry.getValue() instanceof List)
Log.e(entry.getKey(), entry.getValue().toString());
else
Log.e(entry.getKey(), entry.getValue().toString());


else if (object instanceof List)
Log.e("list", object.toString());

js解析后台json数据

List<Map<String, String>> jsonArray = new ArrayList<Map<String,String>>();
        for(TSUser tsUser:userList){
            Map<String, String> map = new HashMap<String, String>();
            map.put("id", tsUser.getId());
            map.put("name", tsUser.getRealName());
            jsonArray.add(map);
        }
        return JSON.toJSONString(jsonArray);

这是后台返回的json数据

 function (json) {
                alert(json) 
                var obj = eval(‘(‘ + json + ‘)‘);

这是前台接收到之后，需要用  

　　eval(‘(‘ + json + ‘)‘);

来解析

 

数据样式：

[{"id":"4028ac00727295b0017273d24d090042","name":"user021111"},{"id":"4028c013640c200f01640c3029a4001e","name":"测试用户一"}]