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https://gitee.com/y_lx/lx/blob/master/README.md
package com.lx.util;//说明:
import com.lx.entity.Var;
import com.lx.gson.Gson;
import com.lx.gson.GsonBuilder;
import com.lx.gson.JsonElement;
import com.lx.gson.JsonParser;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* 创建人:游林夕/2019/3/27 15 01
*/
class CollectionUtil {
// public static void main(String [] args) throws Exception {
//// List s = LX.toList(PageData[].class,LX.format("[{a={0},b='{1}'},{a={0},b='{1}'}]","{a='{0}',b='{1}'}","苏打水"));
//// HashMap pd = LX.toMap(HashMap.class,"{a='阿迪达斯',b={0}}","{a={a=0},b='{1}'}");
//// System.out.println(((HashMap)pd.get("b")).get("a"));
// Var var = LX.toMap("{\"msg\":\"\",\"success\":1,\"count\":7,\"rows\":[{\"service_name\":\"system-server\",\"service_memo\":\"系统服\",\"service_id\":\"0e069943-9121-4861-a066-3c8397e0239a\"},{\"service_name\":\"system-server\",\"service_memo\":\"系统服务\",\"service_id\":\"3e5da9bc-9b8e-4a14-b6c1-89b90930fbbe\"},{\"service_name\":\"system-server\",\"service_memo\":\"系统服\",\"service_id\":\"4489ac23-43ce-4844-9b12-0684dacc2700\"},{\"service_name\":\"system-server\",\"service_memo\":\"系统服\",\"service_id\":\"4c9cf1a5-5d61-4aa4-891f-8ef6ae70186b\"},{\"service_name\":\"system-server\",\"service_memo\":\"系统服\",\"service_id\":\"6ae5ed8c-4a2e-4932-875e-76e9a750c86e\"},{\"service_name\":\"system-server\",\"service_memo\":\"系统服\",\"service_id\":\"85f1f463-23c1-4bb4-a8b1-96f2abcc6441\"},{\"service_name\":\"system-server\",\"service_memo\":\"系统服\",\"service_id\":\"8d755650-6d77-4c09-b919-135475940b49\"}],\"entity\":{}}");
// System.out.println(var.getList("rows").get(0).getStr("service_memo"));
// }
/**
* 克隆Map
*/
static T cloneMap(T obj, String str) {
if (LX.isEmpty(obj)){
return null;
}
if (LX.isNotEmpty(str)){
Map map = new HashMap();
for (String key : str.split(",")){
map.put(key,obj.get(key));
}
return (T) LX.toMap(obj.getClass(),deepClone(map));
}else {
return deepClone(obj);
}
}
/**
* 将对象Clone
*/
static T deepClone(T obj){
try{
// 将对象写到流里
ByteArrayOutputStream bo = new ByteArrayOutputStream();
ObjectOutputStream oo = new ObjectOutputStream(bo);
oo.writeObject(obj);
// 从流里读出来
ByteArrayInputStream bi = new ByteArrayInputStream(bo.toByteArray());
ObjectInputStream oi = new ObjectInputStream(bi);
return (T) oi.readObject();
}catch (Exception e){
return LX.exMsg(e);
}
}
/**将对象转为对象*/
static T toObj(Class t,Object obj){
if (LX.isEmpty(obj)){
return null;
}
if (t.isAssignableFrom(obj.getClass())){
return (T) obj;
}
return g.fromJson(obj instanceof String?(String)obj:g.toJson(obj),t);
}
/**
* 将对象转为Map
* @author
* 创建时间：2018年4月26日 下午5:35:55
*/
static T toMap(Class t,Object json) {
if (json == null){
return null;
}
if (t.isAssignableFrom(json.getClass())){
return (T) json;
}
Map pd = g.fromJson(json instanceof String?(String)json:g.toJson(json),Map.class);
T pp = null;
try {
pp = t.newInstance();
for (Object key : pd.keySet()) {
if(LX.isEmpty(key)){
continue;
}
Object obj = pd.get(key);
if(LX.isNotEmpty(obj)){
if(obj instanceof Map){
pp.put(key, toMap(t,obj));
}else if(obj instanceof List){
pp.put(key, toList(obj));
}else {
pp.put(key,obj);
}
}else{
pp.put(key, obj);
}
}
} catch (Exception e) {
LX.exMsg(e);
}
return pp;
}
/**将对象转为List*/
static List toList(Object obj){
if (obj == null){
return null;
}
List list = null;
if (List.class.isAssignableFrom(obj.getClass())){
list = (List) obj;
}else{
list = g.fromJson(obj instanceof String?(String)obj:g.toJson(obj),List.class);
}
List ls = new ArrayList();
for (Object o : list){
if(o!=null){
if(o instanceof Map){
ls.add(toMap(Var.class,o));
}else if(o instanceof List){
ls.add(toList(o));
}else {
ls.add(o);
}
}else{
ls.add(o);
}
}
return ls;
}
private static Gson g = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").disableHtmlEscaping().create();
static String toJSONString(Object obj) {
if (obj == null){
return null;
}
return obj instanceof String?(String)obj:g.toJson(obj);
}
/**将map中的指定字段为null设置为数字*/
static void nullToNum(Map pd , String str){
if (LX.isEmpty(pd)|| LX.isEmpty(str)){
return;
}
for (String s : str.split(",")){
s = s.trim();
if (LX.isEmpty(pd.get(s))){
pd.put(s,0);
}
}
}
//说明:格式化输出json字符串
/**{ ylx } 2019/8/12 10:04 */
static String toFormatJson(Object json) {
JsonElement jsonElement = null;
if (json instanceof List || json.toString().trim().startsWith("[")){
jsonElement = new JsonParser().parse(toJSONString(json)).getAsJsonArray();
}else{
jsonElement = new JsonParser().parse(toJSONString(json)).getAsJsonObject();
}
Gson gson = new GsonBuilder().disableHtmlEscaping().setPrettyPrinting().create();
return gson.toJson(jsonElement);
}
/**将map中的指定字段为null设置为字符串*/
static void nullToString(Map pd , String str){
if (LX.isEmpty(pd)|| LX.isEmpty(str)){
return;
}
for (String s : str.split(",")){
s = s.trim();
if (LX.isEmpty(pd.get(s))){
pd.put(s,"");
}
}
}
}
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