android Json解析——揭开json解析的神秘面纱

json解析有很多方法，作为android自备利器，这里主要讲讲android的自带解析功能

1.JSONObject转化成对象：

public static MemberStrategy getMemberStrategy(JSONObject jsonObject) {

MemberStrategy memberStrategy = new MemberStrategy();
memberStrategy.setContent(jsonObject.optString("content"));
memberStrategy.setActivityId(jsonObject.optString("activityId"));
memberStrategy.setType(jsonObject.optString("type"));
memberStrategy.setUsable(jsonObject.optBoolean("usable"));
memberStrategy.setRuleId(jsonObject.optString("ruleId"));

return memberStrategy;
}

2.JSONArray 转化成list

public static List<MemberStrategy> getMemberStrategyList(JSONArray jsonArray){
List<MemberStrategy>list=new ArrayList<MemberStrategy>();
if(jsonArray!=null&&jsonArray.length()>0){
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject = (JSONObject)jsonArray.opt(i);
MemberStrategy memberStrategy=getMemberStrategy(jsonObject);
list.add(memberStrategy);
}
}
return list;
}

3. json 串转化成list

public static List<Member>getMemberList(String jsonString){
List<Member>list=new ArrayList<Member>();
if(TextUtils.isEmpty(jsonString)){
return list;
}
try {
JSONArray jsonArray = new JSONArray(jsonString);
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject = (JSONObject)jsonArray.opt(i);
Member member=new Member();
member.setToName(jsonObject.optString("toName"));
List<MemberStrategy>jObjList=getMemberStrategyList(jsonObject.getJSONArray("strategy"));
member.setStrategy(jObjList);
member.setTold(jsonObject.optString("told"));
member.setToName(jsonObject.optString("toName"));
list.add(member);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}

4. JSONObject 要转化成 json 串的话，直接

String jsonStr=jSONObject .toString();

5.对象转JSONObject

JSONObject jobj=newJSONObject ();

jobj.put("name",person.getName());

jobj.put("age",person.getAge());

6.map转json串

/**map 转 jsonString **/
public static String MapToJsonString(Map<String, String> map) {
if (map == null || map.isEmpty()) {
return null;
}
JSONObject jobject = new JSONObject();
Set<?> keySet = map.keySet();
for (Object key : keySet) {
try {
jobject.put(key.toString(),map.get(key));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return jobject.toString();
}

此处只是初步讲解 android json 解析，只做笔记。

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