blocks|key|4662129|text|您可以使用google+gson库来转换json对象。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4662130|https://code.google.com/p/google-gson/‎|offset|length|4662131|像Jackson这样的其他库也是可用的。|4662132|这不会将其转换为地图。但是你可以做任何你想做的事情。|4662133|entityMap|0|LINK|mutability|MUTABLE|url|https://code.google.com/p/google-gson/^0|0|0|12|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

You can use google gson library to convert json object.

<a href="https://code.google.com/p/google-gson/" rel="nofollow">https://code.google.com/p/google-gson/</a>‎

Other librarys like Jackson are also available.

This won't convert it to a map. But you can do all things which you want.

blocks|key|155800|text|使用Gson，您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|155801|Map<String,+Object>+retMap+=+new+Gson().fromJson(
++++jsonString,+new+TypeToken<HashMap<String,+Object>>()+{}.getType()
);|code-block|syntax|javascript|155802|entityMap|0|LINK|mutability|MUTABLE|url|https://code.google.com/p/google-gson/^0|2|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Using <a href="https://code.google.com/p/google-gson/" rel="noreferrer">Gson</a>, you can do the following:
<pre><code>Map&lt;String, Object&gt; retMap = new Gson().fromJson(
 jsonString, new TypeToken&lt;HashMap&lt;String, Object&gt;&gt;() {}.getType()
);
</code></pre>

blocks|key|4662161|text|几天前我用递归写了这段代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4662162|public+static+Map<String,+Object>+jsonToMap(JSONObject+json)+throws+JSONException+{
++++Map<String,+Object>+retMap+=+new+HashMap<String,+Object>();
++++
++++if(json+!=+JSONObject.NULL)+{
++++++++retMap+=+toMap(json);
++++}
++++return+retMap;
}

public+static+Map<String,+Object>+toMap(JSONObject+object)+throws+JSONException+{
++++Map<String,+Object>+map+=+new+HashMap<String,+Object>();

++++Iterator<String>+keysItr+=+object.keys();
++++while(keysItr.hasNext())+{
++++++++String+key+=+keysItr.next();
++++++++Object+value+=+object.get(key);
++++++++
++++++++if(value+instanceof+JSONArray)+{
++++++++++++value+=+toList((JSONArray)+value);
++++++++}
++++++++
++++++++else+if(value+instanceof+JSONObject)+{
++++++++++++value+=+toMap((JSONObject)+value);
++++++++}
++++++++map.put(key,+value);
++++}
++++return+map;
}

public+static+List<Object>+toList(JSONArray+array)+throws+JSONException+{
++++List<Object>+list+=+new+ArrayList<Object>();
++++for(int+i+=+0;+i+<+array.length();+i%2B%2B)+{
++++++++Object+value+=+array.get(i);
++++++++if(value+instanceof+JSONArray)+{
++++++++++++value+=+toList((JSONArray)+value);
++++++++}

++++++++else+if(value+instanceof+JSONObject)+{
++++++++++++value+=+toMap((JSONObject)+value);
++++++++}
++++++++list.add(value);
++++}
++++return+list;
}|code-block|syntax|javascript|4662163|使用Jackson库：|4662164|import+com.fasterxml.jackson.databind.ObjectMapper;

TypeReference<HashMap<String,+Object>>+typeRef+=+new+TypeReference<>()+{};
Map<String,+Object>+mapping+=+new+ObjectMapper().readValue(jsonStr,+typeRef);|4662165|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I wrote this code some days back by recursion.
<pre><code>public static Map&lt;String, Object&gt; jsonToMap(JSONObject json) throws JSONException {
 Map&lt;String, Object&gt; retMap = new HashMap&lt;String, Object&gt;();
 
 if(json != JSONObject.NULL) {
 retMap = toMap(json);
 }
 return retMap;
}

public static Map&lt;String, Object&gt; toMap(JSONObject object) throws JSONException {
 Map&lt;String, Object&gt; map = new HashMap&lt;String, Object&gt;();

 Iterator&lt;String&gt; keysItr = object.keys();
 while(keysItr.hasNext()) {
 String key = keysItr.next();
 Object value = object.get(key);
 
 if(value instanceof JSONArray) {
 value = toList((JSONArray) value);
 }
 
 else if(value instanceof JSONObject) {
 value = toMap((JSONObject) value);
 }
 map.put(key, value);
 }
 return map;
}

public static List&lt;Object&gt; toList(JSONArray array) throws JSONException {
 List&lt;Object&gt; list = new ArrayList&lt;Object&gt;();
 for(int i = 0; i &lt; array.length(); i++) {
 Object value = array.get(i);
 if(value instanceof JSONArray) {
 value = toList((JSONArray) value);
 }

 else if(value instanceof JSONObject) {
 value = toMap((JSONObject) value);
 }
 list.add(value);
 }
 return list;
}
</code></pre>
Using Jackson library:
<pre><code>import com.fasterxml.jackson.databind.ObjectMapper;

TypeReference&lt;HashMap&lt;String, Object&gt;&gt; typeRef = new TypeReference&lt;&gt;() {};
Map&lt;String, Object&gt; mapping = new ObjectMapper().readValue(jsonStr, typeRef);
</code></pre>

blocks|key|155885|text|以下是Vikas移植到JSR+353的代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|155886|import+java.util.ArrayList;
import+java.util.HashMap;
import+java.util.Iterator;
import+java.util.List;
import+java.util.Map;

import+javax.json.JsonArray;
import+javax.json.JsonException;
import+javax.json.JsonObject;

public+class+JsonUtils+{
++++public+static+Map<String,+Object>+jsonToMap(JsonObject+json)+{
++++++++Map<String,+Object>+retMap+=+new+HashMap<String,+Object>();

++++++++if(json+!=+JsonObject.NULL)+{
++++++++++++retMap+=+toMap(json);
++++++++}
++++++++return+retMap;
++++}

++++public+static+Map<String,+Object>+toMap(JsonObject+object)+throws+JsonException+{
++++++++Map<String,+Object>+map+=+new+HashMap<String,+Object>();

++++++++Iterator<String>+keysItr+=+object.keySet().iterator();
++++++++while(keysItr.hasNext())+{
++++++++++++String+key+=+keysItr.next();
++++++++++++Object+value+=+object.get(key);

++++++++++++if(value+instanceof+JsonArray)+{
++++++++++++++++value+=+toList((JsonArray)+value);
++++++++++++}

++++++++++++else+if(value+instanceof+JsonObject)+{
++++++++++++++++value+=+toMap((JsonObject)+value);
++++++++++++}
++++++++++++map.put(key,+value);
++++++++}
++++++++return+map;
++++}

++++public+static+List<Object>+toList(JsonArray+array)+{
++++++++List<Object>+list+=+new+ArrayList<Object>();
++++++++for(int+i+=+0;+i+<+array.size();+i%2B%2B)+{
++++++++++++Object+value+=+array.get(i);
++++++++++++if(value+instanceof+JsonArray)+{
++++++++++++++++value+=+toList((JsonArray)+value);
++++++++++++}

++++++++++++else+if(value+instanceof+JsonObject)+{
++++++++++++++++value+=+toMap((JsonObject)+value);
++++++++++++}
++++++++++++list.add(value);
++++++++}
++++++++return+list;
++++}
}|code-block|syntax|javascript|155887|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is Vikas's code ported to JSR 353:

<pre><code>import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.json.JsonArray;
import javax.json.JsonException;
import javax.json.JsonObject;

public class JsonUtils {
 public static Map&lt;String, Object&gt; jsonToMap(JsonObject json) {
 Map&lt;String, Object&gt; retMap = new HashMap&lt;String, Object&gt;();

 if(json != JsonObject.NULL) {
 retMap = toMap(json);
 }
 return retMap;
 }

 public static Map&lt;String, Object&gt; toMap(JsonObject object) throws JsonException {
 Map&lt;String, Object&gt; map = new HashMap&lt;String, Object&gt;();

 Iterator&lt;String&gt; keysItr = object.keySet().iterator();
 while(keysItr.hasNext()) {
 String key = keysItr.next();
 Object value = object.get(key);

 if(value instanceof JsonArray) {
 value = toList((JsonArray) value);
 }

 else if(value instanceof JsonObject) {
 value = toMap((JsonObject) value);
 }
 map.put(key, value);
 }
 return map;
 }

 public static List&lt;Object&gt; toList(JsonArray array) {
 List&lt;Object&gt; list = new ArrayList&lt;Object&gt;();
 for(int i = 0; i &lt; array.size(); i++) {
 Object value = array.get(i);
 if(value instanceof JsonArray) {
 value = toList((JsonArray) value);
 }

 else if(value instanceof JsonObject) {
 value = toMap((JsonObject) value);
 }
 list.add(value);
 }
 return list;
 }
}
</code></pre>

blocks|key|4662194|text|import+java.util.ArrayList;
import+java.util.HashMap;
import+java.util.Iterator;
import+java.util.List;
import+java.util.Map;

import+org.json.simple.JSONArray;
import+org.json.simple.JSONObject;


public+class+JsonUtils+{

++++public+static+Map<String,+Object>+jsonToMap(JSONObject+json)+{
++++++++Map<String,+Object>+retMap+=+new+HashMap<String,+Object>();

++++++++if(json+!=+null)+{
++++++++++++retMap+=+toMap(json);
++++++++}
++++++++return+retMap;
++++}

++++public+static+Map<String,+Object>+toMap(JSONObject+object)+{
++++++++Map<String,+Object>+map+=+new+HashMap<String,+Object>();

++++++++Iterator<String>+keysItr+=+object.keySet().iterator();
++++++++while(keysItr.hasNext())+{
++++++++++++String+key+=+keysItr.next();
++++++++++++Object+value+=+object.get(key);

++++++++++++if(value+instanceof+JSONArray)+{
++++++++++++++++value+=+toList((JSONArray)+value);
++++++++++++}

++++++++++++else+if(value+instanceof+JSONObject)+{
++++++++++++++++value+=+toMap((JSONObject)+value);
++++++++++++}
++++++++++++map.put(key,+value);
++++++++}
++++++++return+map;
++++}

++++public+static+List<Object>+toList(JSONArray+array)+{
++++++++List<Object>+list+=+new+ArrayList<Object>();
++++++++for(int+i+=+0;+i+<+array.size();+i%2B%2B)+{
++++++++++++Object+value+=+array.get(i);
++++++++++++if(value+instanceof+JSONArray)+{
++++++++++++++++value+=+toList((JSONArray)+value);
++++++++++++}

++++++++++++else+if(value+instanceof+JSONObject)+{
++++++++++++++++value+=+toMap((JSONObject)+value);
++++++++++++}
++++++++++++list.add(value);
++++++++}
++++++++return+list;
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4662195|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;


public class JsonUtils {

 public static Map&lt;String, Object&gt; jsonToMap(JSONObject json) {
 Map&lt;String, Object&gt; retMap = new HashMap&lt;String, Object&gt;();

 if(json != null) {
 retMap = toMap(json);
 }
 return retMap;
 }

 public static Map&lt;String, Object&gt; toMap(JSONObject object) {
 Map&lt;String, Object&gt; map = new HashMap&lt;String, Object&gt;();

 Iterator&lt;String&gt; keysItr = object.keySet().iterator();
 while(keysItr.hasNext()) {
 String key = keysItr.next();
 Object value = object.get(key);

 if(value instanceof JSONArray) {
 value = toList((JSONArray) value);
 }

 else if(value instanceof JSONObject) {
 value = toMap((JSONObject) value);
 }
 map.put(key, value);
 }
 return map;
 }

 public static List&lt;Object&gt; toList(JSONArray array) {
 List&lt;Object&gt; list = new ArrayList&lt;Object&gt;();
 for(int i = 0; i &lt; array.size(); i++) {
 Object value = array.get(i);
 if(value instanceof JSONArray) {
 value = toList((JSONArray) value);
 }

 else if(value instanceof JSONObject) {
 value = toMap((JSONObject) value);
 }
 list.add(value);
 }
 return list;
 }
}
</code></pre>

blocks|key|155931|text|你也可以使用Jackson+API来实现这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|155932|++++final+String+json+=+"....your+json...";
++++final+ObjectMapper+mapper+=+new+ObjectMapper();
++++final+MapType+type+=+mapper.getTypeFactory().constructMapType(
++++++++Map.class,+String.class,+Object.class);
++++final+Map<String,+Object>+data+=+mapper.readValue(json,+type);|code-block|syntax|javascript|155933|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use Jackson API as well for this :

<pre><code> final String json = "....your json...";
 final ObjectMapper mapper = new ObjectMapper();
 final MapType type = mapper.getTypeFactory().constructMapType(
 Map.class, String.class, Object.class);
 final Map&lt;String, Object&gt; data = mapper.readValue(json, type);
</code></pre>

blocks|key|155938|text|尝试以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|155939|+Map<String,+String>+params+=+new+HashMap<String,+String>();
++++++++++++++++try
++++++++++++++++{

+++++++++++++++++++Iterator<?>+keys+=+jsonObject.keys();

++++++++++++++++++++while+(keys.hasNext())
++++++++++++++++++++{
++++++++++++++++++++++++String+key+=+(String)+keys.next();
++++++++++++++++++++++++String+value+=+jsonObject.getString(key);
++++++++++++++++++++++++params.put(key,+value);

++++++++++++++++++++}


++++++++++++++++}
++++++++++++++++catch+(Exception+xx)
++++++++++++++++{
++++++++++++++++++++xx.toString();
++++++++++++++++}|code-block|syntax|javascript|155940|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try this code :

<pre><code> Map&lt;String, String&gt; params = new HashMap&lt;String, String&gt;();
 try
 {

 Iterator&lt;?&gt; keys = jsonObject.keys();

 while (keys.hasNext())
 {
 String key = (String) keys.next();
 String value = jsonObject.getString(key);
 params.put(key, value);

 }


 }
 catch (Exception xx)
 {
 xx.toString();
 }
</code></pre>

blocks|key|4662291|text|希望这能起作用，试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4662292|import+com.fasterxml.jackson.databind.ObjectMapper;
Map<String,+Object>+response+=+new+ObjectMapper().readValue(str,+HashMap.class);|code-block|syntax|javascript|4662293|str，您的JSON字符串|4662294|就这么简单，如果你想要emailid，|4662295|String+emailIds+=+response.get("email+id").toString();|4662296|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Hope this will work, try this:

<pre><code>import com.fasterxml.jackson.databind.ObjectMapper;
Map&lt;String, Object&gt; response = new ObjectMapper().readValue(str, HashMap.class);
</code></pre>

str, your JSON String

As Simple as this, if you want emailid, 

<pre><code>String emailIds = response.get("email id").toString();
</code></pre>

blocks|key|4662304|text|假设你有一个电子邮件列表，如下所示。不受任何编程语言的限制，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4662305|emailsList+=+["abc@gmail.com","def@gmail.com","ghi@gmail.com"]|code-block|syntax|javascript|4662306|下面是用于将json转换为map的JAVA代码|4662307|JSONObject+jsonObj+=+new+JSONObject().put("name","abc").put("email+id",emailsList);
Map<String,+Object>+s+=+jsonObj.getMap();|4662308|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Imagine u have a list of email like below. not constrained to any programming language,

<pre><code>emailsList = ["abc@gmail.com","def@gmail.com","ghi@gmail.com"]
</code></pre>

Now following is JAVA code - for converting json to map

<pre><code>JSONObject jsonObj = new JSONObject().put("name","abc").put("email id",emailsList);
Map&lt;String, Object&gt; s = jsonObj.getMap();
</code></pre>

blocks|key|4662339|text|使用json-simple，您可以将数据JSON转换为Map，并将其映射为JSON。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4662340|try
{
++++JSONObject+obj11+=+new+JSONObject();
++++obj11.put(1,+"Kishan");
++++obj11.put(2,+"Radhesh");
++++obj11.put(3,+"Sonal");
++++obj11.put(4,+"Madhu");

++++Map+map+=+new++HashMap();

++++obj11.toJSONString();

++++map+=+obj11;

++++System.out.println(map.get(1));


++++JSONObject+obj12+=+new+JSONObject();

++++obj12+=+(JSONObject)+map;

++++System.out.println(obj12.get(1));
}
catch(Exception+e)
{
++++System.err.println("EROR+:+01+:"%2Be);
}|code-block|syntax|javascript|4662341|entityMap|0|LINK|mutability|MUTABLE|url|http://central.maven.org/maven2/com/googlecode/json-simple/json-simple/1.1.1/json-simple-1.1.1.jar^0|2|B|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Using <a href="http://central.maven.org/maven2/com/googlecode/json-simple/json-simple/1.1.1/json-simple-1.1.1.jar" rel="nofollow noreferrer">json-simple</a> you can convert data JSON to Map and Map to JSON.

<pre><code>try
{
 JSONObject obj11 = new JSONObject();
 obj11.put(1, "Kishan");
 obj11.put(2, "Radhesh");
 obj11.put(3, "Sonal");
 obj11.put(4, "Madhu");

 Map map = new HashMap();

 obj11.toJSONString();

 map = obj11;

 System.out.println(map.get(1));


 JSONObject obj12 = new JSONObject();

 obj12 = (JSONObject) map;

 System.out.println(obj12.get(1));
}
catch(Exception e)
{
 System.err.println("EROR : 01 :"+e);
}
</code></pre>

blocks|key|156083|text|如果您讨厌递归-使用堆栈和javax.json将Json字符串转换为Map列表：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|156084|import+java.io.InputStream;
import+java.util.ArrayList;
import+java.util.HashMap;
import+java.util.List;
import+java.util.Map;
import+java.util.Stack;
import+javax.json.Json;
import+javax.json.stream.JsonParser;

public+class+TestCreateObjFromJson+{
++++public+static+List<Map<String,Object>>+extract(InputStream+is)+{
++++++++List+extracted+=+new+ArrayList<>();
++++++++JsonParser+parser+=+Json.createParser(is);

++++++++String+nextKey+=+"";
++++++++Object+nextval+=+"";
++++++++Stack+s+=+new+Stack<>();
++++++++while(parser.hasNext())+{
++++++++++++JsonParser.Event+event+=+parser.next();
++++++++++++switch(event)+{
++++++++++++++++case+START_ARRAY+:++List+nextList+=+new+ArrayList<>();
++++++++++++++++++++++++++++++++++++if(!s.empty())+{
++++++++++++++++++++++++++++++++++++++++//+If+this+is+not+the+root+object,+add+it+to+tbe+parent+object
++++++++++++++++++++++++++++++++++++++++setValue(s,nextKey,nextList);
++++++++++++++++++++++++++++++++++++}
++++++++++++++++++++++++++++++++++++s.push(nextList);
++++++++++++++++++++++++++++++++++++break;
++++++++++++++++case+START_OBJECT+:+Map<String,Object>+nextMap+=+new+HashMap<>();
++++++++++++++++++++++++++++++++++++if(!s.empty())+{
++++++++++++++++++++++++++++++++++++++++//+If+this+is+not+the+root+object,+add+it+to+tbe+parent+object
++++++++++++++++++++++++++++++++++++++++setValue(s,nextKey,nextMap);
++++++++++++++++++++++++++++++++++++}
++++++++++++++++++++++++++++++++++++s.push(nextMap);
++++++++++++++++++++++++++++++++++++break;
++++++++++++++++case+KEY_NAME+:+nextKey+=+parser.getString();
++++++++++++++++++++++++++++++++break;
++++++++++++++++case+VALUE_STRING+:+setValue(s,nextKey,parser.getString());
++++++++++++++++++++++++++++++++++++break;
++++++++++++++++case+VALUE_NUMBER+:+setValue(s,nextKey,parser.getLong());
++++++++++++++++++++++++++++++++++++break;
++++++++++++++++case+VALUE_TRUE+:+++setValue(s,nextKey,true);
++++++++++++++++++++++++++++++++++++break;
++++++++++++++++case+VALUE_FALSE+:++setValue(s,nextKey,false);
++++++++++++++++++++++++++++++++++++break;
++++++++++++++++case+VALUE_NULL+:+++setValue(s,nextKey,"");
++++++++++++++++++++++++++++++++++++break;
++++++++++++++++case+END_OBJECT+:+++
++++++++++++++++case+END_ARRAY++:+++if(s.size()+>+1)+{
++++++++++++++++++++++++++++++++++++++++//+If+this+is+not+a+root+object,+move+up
++++++++++++++++++++++++++++++++++++++++s.pop();+
++++++++++++++++++++++++++++++++++++}+else+{
++++++++++++++++++++++++++++++++++++++++//+If+this+is+a+root+object,+add+ir+ro+rhw+final+
++++++++++++++++++++++++++++++++++++++++extracted.add(s.pop());+
++++++++++++++++++++++++++++++++++++}
++++++++++++++++default+++++++++:+++break;
++++++++++++}
++++++++}

++++++++return+extracted;
++++}

++++private+static+void+setValue(Stack+s,+String+nextKey,+Object+v)+{
++++++++if(Map.class.isAssignableFrom(s.peek().getClass())+)+((Map)s.peek()).put(nextKey,+v);
++++++++else+((List)s.peek()).add(v);
++++}
}|code-block|syntax|javascript|156085|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you hate recursion - using a Stack and javax.json to convert a Json String into a List of Maps:

<pre><code>import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import javax.json.Json;
import javax.json.stream.JsonParser;

public class TestCreateObjFromJson {
 public static List&lt;Map&lt;String,Object&gt;&gt; extract(InputStream is) {
 List extracted = new ArrayList&lt;&gt;();
 JsonParser parser = Json.createParser(is);

 String nextKey = "";
 Object nextval = "";
 Stack s = new Stack&lt;&gt;();
 while(parser.hasNext()) {
 JsonParser.Event event = parser.next();
 switch(event) {
 case START_ARRAY : List nextList = new ArrayList&lt;&gt;();
 if(!s.empty()) {
 // If this is not the root object, add it to tbe parent object
 setValue(s,nextKey,nextList);
 }
 s.push(nextList);
 break;
 case START_OBJECT : Map&lt;String,Object&gt; nextMap = new HashMap&lt;&gt;();
 if(!s.empty()) {
 // If this is not the root object, add it to tbe parent object
 setValue(s,nextKey,nextMap);
 }
 s.push(nextMap);
 break;
 case KEY_NAME : nextKey = parser.getString();
 break;
 case VALUE_STRING : setValue(s,nextKey,parser.getString());
 break;
 case VALUE_NUMBER : setValue(s,nextKey,parser.getLong());
 break;
 case VALUE_TRUE : setValue(s,nextKey,true);
 break;
 case VALUE_FALSE : setValue(s,nextKey,false);
 break;
 case VALUE_NULL : setValue(s,nextKey,"");
 break;
 case END_OBJECT : 
 case END_ARRAY : if(s.size() &gt; 1) {
 // If this is not a root object, move up
 s.pop(); 
 } else {
 // If this is a root object, add ir ro rhw final 
 extracted.add(s.pop()); 
 }
 default : break;
 }
 }

 return extracted;
 }

 private static void setValue(Stack s, String nextKey, Object v) {
 if(Map.class.isAssignableFrom(s.peek().getClass()) ) ((Map)s.peek()).put(nextKey, v);
 else ((List)s.peek()).add(v);
 }
}
</code></pre>

blocks|key|4662485|text|这是一个古老的问题，可能仍然与某人有关。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4662486|假设你有string+HashMap+hash和JsonObject+jsonObject。|offset|length|style|CODE|4662487|1)定义key-list。|4662488|示例：|4662489|ArrayList<String>+keyArrayList+=+new+ArrayList<>();++
keyArrayList.add("key0");+++
keyArrayList.add("key1");++|code-block|syntax|javascript|4662490|2)创建foreach循环，使用以下命令从jsonObject添加hash：|4662491|for(String+key+:+keyArrayList){++
++++hash.put(key,+jsonObject.getString(key));
}|4662492|这就是我的方法，希望它能回答这个问题。|4662493|entityMap^0|0|J|4|Z|A|0|0|0|0|L|A|X|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@$D|10|E|11|F|G]|$D|12|E|13|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|14|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|15|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|16|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|17|8|@$D|18|E|19|F|G]|$D|1A|E|1B|F|G]]|9|@]|A|$]]|$1|S|3|T|5|N|7|1C|8|@]|9|@]|A|$O|P]]|$1|U|3|V|5|6|7|1D|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|X|$]]

This is an old question and maybe still relate to someone. 
Let's say you have string HashMap <code>hash</code> and JsonObject <code>jsonObject</code>.

1) Define key-list. 
Example:

<pre><code>ArrayList&lt;String&gt; keyArrayList = new ArrayList&lt;&gt;(); 
keyArrayList.add("key0"); 
keyArrayList.add("key1"); 
</code></pre>

2) Create foreach loop, add <code>hash</code> from <code>jsonObject</code> with:

<pre><code>for(String key : keyArrayList){ 
 hash.put(key, jsonObject.getString(key));
}
</code></pre>

That's my approach, hope it answer the question.

blocks|key|156153|text|使用Jackson进行转换：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|156154|JSONObject+obj+=+new+JSONObject().put("abc",+"pqr").put("xyz",+5);

Map<String,+Object>+map+=+new+ObjectMapper().readValue(obj.toString(),+new+TypeReference<Map<String,+Object>>()+{});|code-block|syntax|javascript|156155|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Convert using Jackson :

<pre><code>JSONObject obj = new JSONObject().put("abc", "pqr").put("xyz", 5);

Map&lt;String, Object&gt; map = new ObjectMapper().readValue(obj.toString(), new TypeReference&lt;Map&lt;String, Object&gt;&gt;() {});
</code></pre>

blocks|key|4662546|text|我刚用了Gson|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4662547|HashMap<String,+Object>+map+=+new+Gson().fromJson(json.toString(),+HashMap.class);|code-block|syntax|javascript|4662548|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I just used Gson
<pre><code>HashMap&lt;String, Object&gt; map = new Gson().fromJson(json.toString(), HashMap.class);
</code></pre>

blocks|key|156264|text|有一个使用javax.json发布的here的旧答案，但是它只转换JsonArray和JsonObject，但在输出中仍然有JsonString、JsonNumber和JsonValue包装类。如果你想摆脱这些，这是我的解决方案，它将解开所有的东西。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|156265|除此之外，它还使用Java8流，并包含在一个方法中。|156266|/**
+*+Convert+a+JsonValue+into+a+“plain”+Java+structure+(using+Map+and+List).
+*+
+*+@param+value+The+JsonValue,+not+<code>null</code>.
+*+@return+Map,+List,+String,+Number,+Boolean,+or+<code>null</code>.
+*/
public+static+Object+toObject(JsonValue+value)+{
++++Objects.requireNonNull(value,+"value+was+null");
++++switch+(value.getValueType())+{
++++case+ARRAY:
++++++++return+((JsonArray)+value)
++++++++++++++++.stream()
++++++++++++++++.map(JsonUtils::toObject)
++++++++++++++++.collect(Collectors.toList());
++++case+OBJECT:
++++++++return+((JsonObject)+value)
++++++++++++++++.entrySet()
++++++++++++++++.stream()
++++++++++++++++.collect(Collectors.toMap(
++++++++++++++++++++++++Entry::getKey,
++++++++++++++++++++++++e+->+toObject(e.getValue())));
++++case+STRING:
++++++++return+((JsonString)+value).getString();
++++case+NUMBER:
++++++++return+((JsonNumber)+value).numberValue();
++++case+TRUE:
++++++++return+Boolean.TRUE;
++++case+FALSE:
++++++++return+Boolean.FALSE;
++++case+NULL:
++++++++return+null;
++++default:
++++++++throw+new+IllegalArgumentException("Unexpected+type:+"+%2B+value.getValueType());
++++}
}|code-block|syntax|javascript|156267|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/27679348/388827^0|5|A|X|9|17|A|1Q|A|21|A|2C|9|I|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@$9|17|A|18|1|19]]|E|$]]|$1|F|3|G|5|6|7|1A|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1B|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

There’s an older answer using <code>javax.json</code> posted <a href="https://stackoverflow.com/a/27679348/388827">here</a>, however it only converts <code>JsonArray</code> and <code>JsonObject</code>, but there are still <code>JsonString</code>, <code>JsonNumber</code>, and <code>JsonValue</code> wrapper classes in the output. If you want to get rid of these, here’s my solution which will unwrap everything.
Beside that, it makes use of Java 8 streams and is contained in a single method.
<pre><code>/**
 * Convert a JsonValue into a “plain” Java structure (using Map and List).
 * 
 * @param value The JsonValue, not &lt;code&gt;null&lt;/code&gt;.
 * @return Map, List, String, Number, Boolean, or &lt;code&gt;null&lt;/code&gt;.
 */
public static Object toObject(JsonValue value) {
 Objects.requireNonNull(value, &quot;value was null&quot;);
 switch (value.getValueType()) {
 case ARRAY:
 return ((JsonArray) value)
 .stream()
 .map(JsonUtils::toObject)
 .collect(Collectors.toList());
 case OBJECT:
 return ((JsonObject) value)
 .entrySet()
 .stream()
 .collect(Collectors.toMap(
 Entry::getKey,
 e -&gt; toObject(e.getValue())));
 case STRING:
 return ((JsonString) value).getString();
 case NUMBER:
 return ((JsonNumber) value).numberValue();
 case TRUE:
 return Boolean.TRUE;
 case FALSE:
 return Boolean.FALSE;
 case NULL:
 return null;
 default:
 throw new IllegalArgumentException(&quot;Unexpected type: &quot; + value.getValueType());
 }
}
</code></pre>

I'm using Java, and I have a String which is JSON:

<pre><code>{
"name" : "abc" ,
"email id " : ["abc@gmail.com","def@gmail.com","ghi@gmail.com"]
}
</code></pre>

Then my Map in Java:

<pre><code>Map&lt;String, Object&gt; retMap = new HashMap&lt;String, Object&gt;();
</code></pre>

I want to store all the data from the JSONObject in that HashMap.

Can anyone provide code for this? I want to use the <code>org.json</code> library.

Convert a JSON String to a HashMap

数据存储

JSON

Java

我使用的是Java，我有一个JSON字符串：{"name" : "abc" ,"email id " : ["abc@gmail.com","def@gmail.com","ghi@gmail.com"]}然后是my Map in Java：Map<String, Object> retMap = new HashMa...

问将JSON字符串转换为HashMap
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