Convert between JSON string and Map

Preface: Alibaba's fastjson is used here (literally, fast json, which provides strings related to JSON, which can be quickly converted).
The dependencies are as follows:

		<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.73</version>
        </dependency>

MAP to JSON string

String str=JSON.toJSON(collection).toString();
str is the converted string.

 		Map<String,Object> map=new HashMap<String,Object>();
        map.put("key1","value1");

        News news1=new News("1","今天天气不错","天气晴朗","213",new Date(),1L);
        News news2=new News("1","今天天气不错","天气晴朗","213",new Date(),1L);
        News news3=new News("1","今天天气不错","天气晴朗","213",new Date(),1L);
        List<News> news=new ArrayList<>();
        news.add(news1);
        news.add(news2);
        news.add(news3);
        map.put("news",news);

        String str = JSON.toJSON(map).toString();//JSON是jar包提供的工具类    import com.alibaba.fastjson.JSON;
        System.out.println(str);

The output result is: the result is definitely no problem, biubiu--

verify authenticity:

JSON string to Map

Map j2map = JSON.parseObject(json string, Map.class);
j2map is the converted Map

 		Map j2map = JSON.parseObject(s, Map.class);
        System.out.println("后map"+j2map);
        System.out.println(j2map.get("key1"));
        System.out.println(j2map.get("news"));

Result:

If there is a problem, please point out