有如下代码: JSONArray ds = (JSONArray) json.get("DS"); 其中ds的值是[{"Station_Name":"耿马国家基本气象站","Station_Id_C":"56946","SUM_PRE_Time_2020":"166"}, {"Station_Name":"临沧国家基本气象站","Station_Id_C":"56951","SUM_PRE_Time_2020":"95.4"}, {"Station_Name":"沧源","Station_Id_C":"56944","SUM_PRE_Time_2020":"260.8"}, {"Station_Name":"双江","Station_Id_C":"56950","SUM_PRE_Time_2020":"70.4"}] 如何结合freemarker动态生成html.将里面对应的Station_Id_C,SUM_PRE_Time_2020的值展示成一张表格 其中springboot该怎么写

你可以使用Freemarker模板引擎和Spring Boot框架来动态生成HTML表格，具体实现步骤如下：

1. 首先，将JSON数组转换为Java List对象，可以使用阿里巴巴的fastjson库进行转换：

JSONArray ds = (JSONArray) json.get("DS");
List<Map<String, String>> stationList = JSONObject.parseObject(ds.toJSONString(), new TypeReference<List<Map<String, String>>>(){});

2. 然后，在Spring Boot项目中创建一个Controller类，将List对象传递给Freemarker模板：

@Controller
public class StationController {
 
    @RequestMapping("/station")
    public String showStationList(Model model) {
        JSONArray ds = (JSONArray) json.get("DS");
        List<Map<String, String>> stationList = JSONObject.parseObject(ds.toJSONString(), new TypeReference<List<Map<String, String>>>(){});
        model.addAttribute("stationList", stationList);
        return "station-list";
    }
}

3. 创建Freemarker模板station-list.ftl，并在其中使用Freemarker的语法生成HTML表格：

<table>
  <thead>
    <tr>
      <th>站点名称</th>
      <th>站点ID</th>
      <th>降水量</th>
    </tr>
  </thead>
  <tbody>
    <#list stationList as station>
      <tr>
        <td>${station.Station_Name}</td>
        <td>${station.Station_Id_C}</td>
        <td>${station.SUM_PRE_Time_2020}</td>
      </tr>
    </#list>
  </tbody>
</table>

4. 最后，在Spring Boot项目中配置Freemarker视图解析器：

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
 
    @Bean
    public ViewResolver getViewResolver() {
        FreeMarkerViewResolver resolver = new FreeMarkerViewResolver();
        resolver.setPrefix("");
        resolver.setSuffix(".ftl");
        resolver.setCache(false);
        resolver.setContentType("text/html; charset=utf-8");
        return resolver;
    }
 
    @Bean
    public FreeMarkerConfigurer getFreeMarkerConfigurer() {
        FreeMarkerConfigurer configurer = new FreeMarkerConfigurer();
        configurer.setTemplateLoaderPath("/WEB-INF/views/");
        configurer.setDefaultEncoding("UTF-8");
        return configurer;
    }
}

这样，当访问“/station”路径时，Spring Boot将会渲染station-list.ftl模板，动态生成HTML表格，并将结果返回给客户端。