使用java将String类型的json转为json对象并进行取出响应的值

我会带着你远行 2021-09-21 13:34 271阅读 0赞

**使用java将String类型的json转为json对象并进行取出相应的值**

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### 使用的jar包，如果使用的事maven可直接接入这个到pom.xml中—— fastjson-1.2.47.jar【也可自行搜索使用】 ###

【jar包已经打包下载好了，点击下载就好】： [fastjson-1.2.47.jar][] （不收积分，完全免费）

<dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>fastjson</artifactId>
          <version>1.2.47</version>
        </dependency>

### 其实还有更方便的方法  ————》 [Java中json转map][Java_json_map] ###

### 对应的java代码 ###

import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONArray;
    import com.alibaba.fastjson.JSONObject;
    
    public class demo {
        
        @org.junit.Test
        public void fun3(){
            String result = "{\"status\":200,\"content\":[{\"code\":\"0\",\"type_one_id\":\"0\",\"tao_id\":\"629975213407\",\"shop_dsr\":\"4.8815\",\"volume\":\"5900\",\"size\":\"12.9\",\"quanhou_jiage\":\"12.9\",\"tkrate3\":\"0.90\",\"yongjin_type\":\"ZX\",\"coupon_id\":\"\",\"coupon_start_time\":\"\",\"coupon_end_time\":\"\",\"coupon_info_money\":\"0\",\"coupon_total_count\":\"0\",\"coupon_remain_count\":\"0\",\"coupon_info\":\"\",\"juhuasuan\":\"0\",\"taoqianggou\":\"0\",\"haitao\":\"0\",\"jiyoujia\":\"0\",\"jinpaimaijia\":\"0\",\"pinpai\":\"0\",\"pinpai_name\":\"\",\"yunfeixian\":\"0\",}]}";
            System.out.println(result);
            //将String字符转为Json对象
            JSONObject jsonObject = JSON.parseObject(result);
    
            //获取当前嵌套下的属性
            String status = jsonObject.getString("status");
            if (status!=null){
                System.out.println(status);
            }
    
            //获取嵌套中的json串,细心观察 content为json数组，里面可放多个json对象
            JSONArray jsonArray = jsonObject.getJSONArray("content");
    
            //将json数组中取出一个json ，当前只有一个json组，所以下标为0 
            JSONObject jsonFirst = jsonArray.getJSONObject(0);
    
            //取出这个json中的值
            String yongjin_type = jsonFirst.getString("yongjin_type");
            if (yongjin_type!=null){
                System.out.println(yongjin_type);
            }
    
        }
    	
    /*
    【注意：】
    	 当前有二级嵌套
    	 
    	 一级嵌套 status、content
    	 二级嵌套 content中为json数组，可存放多个json对象，当前存放一个
    	
    	
    	{
    	"status": 200,
    	"content": [{
    		"code": "0",
    		"type_one_id": "0",
    		"tao_id": "629975213407",
    		"shop_dsr": "4.8815",
    		"volume": "5900",
    		"size": "12.9",
    		"quanhou_jiage": "12.9",
    		"tkrate3": "0.90",
    		"yongjin_type": "ZX",
    		"coupon_id": "",
    		"coupon_start_time": "",
    		"coupon_end_time": "",
    		"coupon_info_money": "0",
    		"coupon_total_count": "0",
    		"coupon_remain_count": "0",
    		"coupon_info": "",
    		"juhuasuan": "0",
    		"taoqianggou": "0",
    		"haitao": "0",
    		"jiyoujia": "0",
    		"jinpaimaijia": "0",
    		"pinpai": "0",
    		"pinpai_name": "",
    		"yunfeixian": "0",
    	}]
    }
    */
    }

[fastjson-1.2.47.jar]: https://download.csdn.net/download/L_fly_J/13455019
[Java_json_map]: https://blog.csdn.net/L_fly_J/article/details/112913300