{
    "key1":"{\"type\":\"Polygon\",\"coordinates\":[XXX]}",
    "name":"zhangsan"
}

String okData = StringEscapeUtils.unescapeJava(前端传入的Json文件);

Student student = JSONUtil.parseObj(okData);

    public static void main(String[] args) {
        String 中括号方式1 = "[name]";

        //中括号方式1.replaceAll("["); // 编译报错
        中括号方式1.replaceAll("\\[");
    }