java的JsonObject对象提取值方法

实例如下所示：

import com.alibaba.fastjson.json;
import com.alibaba.fastjson.jsonarray;
import com.alibaba.fastjson.jsonobject;
import io.swagger.models.auth.in;
import java.io.ioexception;
import java.security.keymanagementexception;
import java.security.nosuchalgorithmexception;
import java.util.iterator;
/**
 * created by administrator on 2017/4/21.
 */
public class test {
  public static void main(string[] args) throws exception {
    
    //第一种格式
	  /**
		* [
  		{
    		"data ": [
      		{
        		"building_id ": "*** ",
        		"building_num ": "** ",
        		"door_name ": "** ",
        		"electric ": "** ",
        		"room_name ": "** "
      		}
    		],
    		"success ": true
  			}
			]
		*/
    string s="[{\"success\":true,\"data\":[{\"building_id\":\"***\",\"building_num\":\"**\",\"room_name\":\"**\",\"door_name\":\"**\",\"electric\":\"**\"}]}]" ;
    string b= s.substring(0,s.length()-1);
    string c=b.substring(1, b.length());
    system.out.println(b+"b___");
    jsonobject jsonx = json.parseobject(c);
    jsonarray ja = jsonx.getjsonarray("data");
    for (int i = 0; i < ja.size(); i++) {
      jsonobject jo = ja.getjsonobject(i);
      string building_id = jo.getstring("building_id");
      system.out.println(building_id+"building_id>>>>>");
    }
    //第二种格式
	  /**
		 * [
  			{
    			"password ": "*1234567890 ",
    			"success ": "true "
  			}
			]
		 */
    string s="[{\"success\":\"true\",\"password\":\"*1234567890\"}]";
    string b= s.substring(0,s.length()-1);
    string c=b.substring(1, b.length());
    system.out.println(c+"c___");
    jsonobject reagobj = jsonobject.fromobject(c);
    string name = reagobj.getstring("password");
    system.out.println(name+"name,,,,,,");
    string password = jm.getstring("password");
    system.out.println(password);
    system.out.println("看看有没有值"+password);  
    
		//第三种格式
		/**
		* {
  		"data ": {
    		"access_token ": "5a7040ccf66bafd06acd39b6f61c19230eaba426755509646d6da23ddd9fb206 ",
    		"expires_second ": 36000
  		},
  		"rlt_code ": "hh0000 ",
  		"rlt_msg ": "成功 "
		}
		 */
    string res="{\"data\":{\"access_token\":\"5a7040ccf66bafd06acd39b6f61c19230eaba426755509646d6da23ddd9fb206\",\"expires_second\":36000},\"rlt_code\":\"hh0000\",\"rlt_msg\":\"成功\"}";
    jsonobject jsonobject= json.parseobject(res);
    string data = jsonobject.getstring("data");
    jsonobject jsondata= json.parseobject(data);
    string token = jsondata.getstring("access_token");
		
		//第四种格式
		 /**
		 * { 
			"data ":
				{ 
					"total ":23, 
					"start ":0, 
					"total_page ":3, 
					"rows ":
						[
							{ "op_way ": "3 ", "user_mobile ": "15321918571 ", "op_time ":1493881391976, "pwd_no ":30},
							{ "op_way ": "1 ", "op_time ":1493880995000, "pwd_no ":31}
						], 
					"current_page ":1, 
					"page_size ":10
				}, 
			"rlt_code ": "hh0000 ",
			"rlt_msg ": "成功 "
		}
		*/
    string res="{\"data\":{\"total\":23,\"start\":0,\"total_page\":3,\"rows\":[{\"op_way\":\"1\",\"op_time\":1493884964000,\"pwd_no\":31},{\"op_way\":\"3\",\"user_mobile\":\"18518517491\",\"op_time\":1493884615032,\"pwd_no\":30},{\"op_way\":\"3\",\"user_mobile\":\"18518517491\",\"op_time\":1493883836552,\"pwd_no\":30},{\"op_way\":\"1\",\"op_time\":1493883294000,\"pwd_no\":31},{\"op_way\":\"1\",\"op_time\":1493883256000,\"pwd_no\":31},{\"op_way\":\"3\",\"user_mobile\":\"15321918571\",\"op_time\":1493883015371,\"pwd_no\":30},{\"op_way\":\"1\",\"op_time\":1493882007000,\"pwd_no\":31},{\"op_way\":\"3\",\"user_mobile\":\"15321918571\",\"op_time\":1493881498520,\"pwd_no\":30},{\"op_way\":\"3\",\"user_mobile\":\"15321918571\",\"op_time\":1493881391976,\"pwd_no\":30},{\"op_way\":\"1\",\"op_time\":1493880995000,\"pwd_no\":31}],\"current_page\":1,\"page_size\":10},\"rlt_code\":\"hh0000\",\"rlt_msg\":\"成功\"}";
    jsonobject jsonobject= json.parseobject(res);
    string data = jsonobject.getstring("data");
    jsonobject jsonobjects= json.parseobject(data);
    jsonarray ja = jsonobjects.getjsonarray("rows");
    for (int i = 0; i < ja.size(); i++) {
      jsonobject jo = ja.getjsonobject(i);
      string op_way = jo.getstring("op_way");
      string op_time = jo.getstring("op_time");
      simpledateformat simpledateformat = new simpledateformat("yyyy-mm-dd hh:mm:ss");
      long lt = new long(op_time);
      date date = new date(lt);
      res = simpledateformat.format(date);
      string pwd_no = jo.getstring("pwd_no");
      string user_mobile = jo.getstring("user_mobile");
      system.out.println(op_way+res+pwd_no+user_mobile+"------------");
    }
   
  
  }
  }

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