Correct conversion between JSON data and list collection

1.JSON Data and List Correct conversion between sets

    @Test
    public void testJsonObjectCastToList() {
        // 0. Collection test data preparation 
        List<PersonInfo> personInfos = new ArrayList<>();
        PersonInfo personInfoOne =
                new PersonInfo(" Xiao Ming ", 18, 178.89);
        PersonInfo personInfoTwo =
                new PersonInfo(" Xiaohong ", 18, 165.56);
        personInfos.add(personInfoOne);
        personInfos.add(personInfoTwo);

        // 1.JSON Data and List Correct conversion between sets 

        // 1.1  take List Set to JSON Data string 
        String str = JSON.toJSONString(personInfos);
        System.out.println(str);
        // [{"age":18,"height":178.89,"name":" Xiao Ming "},{"age":18,"height":165.56,"name":" Xiaohong "}]

        // 1.2  take JSON The data goes to list aggregate 
        List<PersonInfo> personInfoList;
        try {
            personInfoList = JSON.parseArray(str, PersonInfo.class);
        } catch (Exception e) {
            log.error("JSON Parsing exceptions :{}", ExceptionUtils.getStackTrace(e));
            personInfoList = new ArrayList<>();
        }
        System.out.println(personInfoList);
        // [PersonInfo(name= Xiao Ming , age=18, height=178.89), PersonInfo(name= Xiaohong , age=18, height=165.56)]

        /**
         * 2. When the following code is executed , Abnormal transactions ：
         * com.alibaba.fastjson.JSONException: syntax error, expect {,
         * actual error, pos 1, fastjson-version 1.2.62
         */
//        // 2.1  Convert a set directly to a string 
//        String strMethod = String.valueOf(personInfos);
//        System.out.println(strMethod);
        // [PersonInfo(name= Xiao Ming , age=18, height=178.89), PersonInfo(name= Xiaohong , age=18, height=165.56)]

//        // 2.2  take JSON The data goes to list aggregate 
//        List<PersonInfo> personInfoListStr = JSON.parseArray(strMethod, PersonInfo.class);
//        System.out.println(personInfoListStr);

    }