meidu2021/daju/target/classes/cn/com/lzt/tools/JsonTools.java

package cn.com.lzt.tools;

import java.io.IOException;
import java.util.List;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import org.codehaus.jackson.map.ObjectMapper;
import org.jeecgframework.web.system.pojo.base.TSUser;
import org.json.JSONException;

public class JsonTools {
	 /**
	   * 将json转化为实体POJO
	   * @param jsonStr
	   * @param obj
	   * @return
	   */
	  public static<T> Object JSONToObj(String jsonStr,Class<T> obj) {
	    T t = null;
	    try {
	      ObjectMapper objectMapper = new ObjectMapper();
	      t = objectMapper.readValue(jsonStr,
	          obj);
	    } catch (Exception e) {
	      e.printStackTrace();
	    }
	    return t;
	  }
	  /**
	   * 将实体POJO转化为JSON
	   * @param obj
	   * @return
	   * @throws JSONException
	   * @throws IOException
	   */
//	  public static<T> JSONObject objectToJson(T obj) throws JSONException, IOException {
//	    ObjectMapper mapper = new ObjectMapper(); 
//	    // Convert object to JSON string 
//	    String jsonStr = "";
//	    try {
//	       jsonStr = mapper.writeValueAsString(obj);
//	    } catch (IOException e) {
//	      throw e;
//	    }
//	    return new JSONObject(jsonStr);
//	  }
	  public static void main(String[] args) throws JSONException, IOException {
	    JSONObject obj = null;
	    obj = new JSONObject();
//	    obj.put("userName", "213");
//	    obj.put("id", 27);
//	    JSONArray array = new JSONArray();
//	    array.put(obj);
//	    obj = new JSONObject();
//	    obj.put("userName", "214");
//	    obj.put("id", 28);
//	    array.put(obj);
	    String ostr = "{\"errcode\":0,\"errmsg\":\"ok\",\"userlist\":[{\"userName\":\"卓感科技\",\"id\":\"manager6528\"},{\"userName\":\"程尧\",\"id\":\"03460032393259\"},{\"userName\":\"陈旭东\",\"id\":\"03424335654855\"},{\"userName\":\"董广群\",\"id\":\"03443148156837\"}]}";
	    obj = JSONObject.fromObject(ostr);
	  System.out.println( obj.get("userlist"));

	  JSONArray json = 	  JSONArray.fromObject(obj.get("userlist"));
	  List<TSUser> persons = (List<TSUser>)JSONArray.toList(json, TSUser.class);
	  System.out.println(persons);
//	  Object user = JSONToObj("\"userList\":" + obj.get("userlist").toString(), UserList.class);
//	  System.out.println( user);
	  
//	  JSONObject jsStr = JSONObject.fromObject("{"+obj.get("userlist").toString()+"}");
	    //	    Student stu = (Student) JSONToObj(obj.toString(), Student.class);
//	    JSONObject objList = new JSONObject();
//	    objList.put("student", array);
//	    System.out.println("objList:"+objList);
//	    StudentList stuList = (StudentList) JSONToObj(objList.toString(), StudentList.class);
//	    System.out.println("student:"+stu);
//	    System.out.println("stuList:"+stuList);
//	    System.out.println("#####################################");
//	    JSONObject getObj = objectToJson(stu);
//	    System.out.println(getObj);
	  }
}