澳门游戏平台大全 电子游戏平台 json字符串调换为多元Map

json字符串调换为多元Map

json字符串转换为多级Map -list-map的形式

网上找了好多方法都是一级的,由于需要多级map,于是做如下封装

 

public static Map parseJSON2Map(String jsonStr){

//最外层解析
if(jsonStr!=null&&jsonStr.startsWith({)&&jsonStr.endsWith(})){
Map map = new HashMap();

JSONObject json = JSONObject.fromObject(jsonStr);
for(Object k : json.keySet()){

Object v = json.get(k);
//如果内层还是数组的话,继续解析
if(v instanceof JSONArray){
List> list = new ArrayList>();
Iterator it = ((JSONArray)v).iterator();
while(it.hasNext()){
JSONObject json2 = it.next();
list.add(parseJSON2Map(json2.toString()));
}
map.put(k.toString(), list);
} else {
Map m = parseJSON2Map(v.toString());
if(m==null)
map.put(k.toString(), v);
else
map.put(k.toString(), m);
}
}
return map;
}else{
return null;
}
}

 

-list-map的形式
网上找了好多方法都是一级的,由于需要多级map,于是做如下封装 public
static Map parseJSON2Map(String js…

}

public JsonDateValueProcessor() {

import java.text.SimpleDateFormat;
import java.util.Date;

public static List getDTOList(String jsonString, Class clazz){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
List list = new ArrayList();
for(Iterator iter = array.iterator(); iter.hasNext();){
JSONObject jsonObject = (JSONObject)iter.next();
电子游戏平台,list.add(JSONObject.toBean(jsonObject, clazz));
}
return list;
}

public static Object[] getDTOArray(String jsonString, Class clazz){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
Object[] obj = new Object[array.size()];
for(int i = 0; i < array.size(); i++){
JSONObject jsonObject = array.getJSONObject(i);
obj[i] = JSONObject.toBean(jsonObject, clazz);
}
return obj;
}

public static String getJSONString(Object object) throws Exception{
String jsonString = null;
//日期值处理器
JsonConfig jsonConfig = new JsonConfig();
jsonConfig.registerJsonValueProcessor(java.util.Date.class, new
JsonDateValueProcessor());
if(object != null){
if(object instanceof Collection || object instanceof Object[]){
jsonString = JSONArray.fromObject(object, jsonConfig).toString();
}else{
jsonString = JSONObject.fromObject(object, jsonConfig).toString();
}
}
return jsonString == null ? “{}” : jsonString;
}

 

}

三解析如下例子
String rowidString=”[{“kl_id”:”2″,”kl_title”:”Test
date”,”kl_content”:”Test
date”,”kl_type”:”1″,”id”:”1″},{“kl_id”:”2″,”kl_title”:”Test”,”kl_content”:”Test”,”kl_type”:”1″,”id”:”2″}]”;

public static Map getMapFromJson(String jsonString) {
setDataFormat2JAVA();
JSONObject jsonObject = JSONObject.fromObject(jsonString);
Map map = new HashMap();
for(Iterator iter = jsonObject.keys(); iter.hasNext();){
String key = (String)iter.next();
map.put(key, jsonObject.get(key));
}
return map;
}

Json-lib requires (at least) the following dependencies in your
classpath:
* jakarta commons-lang 2.4
* jakarta commons-beanutils 1.7.0
* jakarta commons-collections 3.2
* jakarta commons-logging 1.1.1
* ezmorph 1.0.6
.二.
public class JsonUtil {

public Object processObjectValue(String key, Object value, JsonConfig
jsonConfig) {
return process(value, jsonConfig);
}

public JsonDateValueProcessor(String format) {
this.format = format;
}

}

private static void setDataFormat2JAVA(){
//设定日期转换格式
JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(new
String[] {“yyyy-MM-dd”, “yyyy-MM-dd HH:mm:ss”}));
}

public static List getDTOList(String jsonString, Class clazz, Map
map){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
List list = new ArrayList();
for(Iterator iter = array.iterator(); iter.hasNext();){
JSONObject jsonObject = (JSONObject)iter.next();
list.add(JSONObject.toBean(jsonObject, clazz, map));
}
return list;
}

JSONArray array = JSONArray.fromObject(rowidString);
Object[] obj = new Object[array.size()];
for(int i = 0; i < array.size(); i++){
JSONObject jsonObject = array.getJSONObject(i);

public static Object[] getDTOArray(String jsonString, Class clazz, Map
map){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
Object[] obj = new Object[array.size()];
for(int i = 0; i < array.size(); i++){
JSONObject jsonObject = array.getJSONObject(i);
obj[i] = JSONObject.toBean(jsonObject, clazz, map);
}
return obj;
}

private String format = “yyyy-MM-dd HH:mm:ss”;

import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;

一json-lib.jar开发包使用依赖包
json-lib.jar开发包使用需要依赖包以下开发包:

public void setFormat(String format) {
this.format = format;
}

public class JsonDateValueProcessor implements JsonValueProcessor {

public String getFormat() {
return format;
}

private Object process( Object value, JsonConfig jsonConfig ) {
if (value instanceof Date) {
String str = new SimpleDateFormat(format).format((Date) value);
return str;
}
return value == null ? null : value.toString();
}

System.out.println(jsonObject.get(“kl_id”));

public static void main(String[] arg) throws Exception{
String s = “{status : ‘success’}”;
System.out.println(” object : ” + JsonUtil.getJSONString(s));
}
}

public static Object getDTO(String jsonString, Class clazz){
JSONObject jsonObject = null;
try{
setDataFormat2JAVA();
jsonObject = JSONObject.fromObject(jsonString);
}catch(Exception e){
e.printStackTrace();
}
return JSONObject.toBean(jsonObject, clazz);
}

对于对象中有明确类型的对象属性,可不管;但对象中有集合属性的,由于类型不明确,所以要先明确类型:
String jsonString = request.getParameter(“json”);
//增加对象中的集合属性的类型以及对象元素中的对象属性的集合属性的类型
Map clazzMap = new HashMap();
//secondItems是FirstDTO里的集合属性
clazzMap.put(“secondItems”, SecondDTO.class);
//thirdItems是SecondDTO里的集合属性
clazzMap.put(“thirdItems”, ThirdDTO.class);
FirstDTO firstDTO = (FirstDTO)JsonUtil.getDTO(jsonString,
FirstDTO.class, clazzMap);

public static Object getDTO(String jsonString, Class clazz, Map map){
JSONObject jsonObject = null;
try{
setDataFormat2JAVA();
jsonObject = JSONObject.fromObject(jsonString);
}catch(Exception e){
e.printStackTrace();
}
return JSONObject.toBean(jsonObject, clazz, map);
}

public Object processArrayValue(Object value, JsonConfig jsonConfig) {
return process(value, jsonConfig);
}

public static Object[] getObjectArrayFromJson(String jsonString) {
JSONArray jsonArray = JSONArray.fromObject(jsonString);
return jsonArray.toArray();
}

public final static String JSON_ATTRIBUTE = “json”;
public final static String JSON_ATTRIBUTE1 = “json1”;
public final static String JSON_ATTRIBUTE2 = “json2”;
public final static String JSON_ATTRIBUTE3 = “json3”;
public final static String JSON_ATTRIBUTE4 = “json4”;

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