controller中拼接list

最新推荐文章于 2024-06-25 17:04:23 发布

原创最新推荐文章于 2024-06-25 17:04:23 发布 · 550 阅读

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本文介绍了一个Spring MVC中的参数控制器实现，该控制器提供了通过ID查询参数列表的功能，并返回用于生成下拉菜单的数据。文章详细展示了如何使用@Autowired注解进行依赖注入，@RequestMapping注解处理HTTP请求，以及如何将查询结果转换为适合前端展示的格式。

@Controller
@RequestMapping("paramter")
public class ParamterController {


    @Autowired
    private IParamterService service;




    @ResponseBody
    @RequestMapping(value = "findParamterByPid",method = RequestMethod.GET)
    public Map<String,Object> findParamterByPid(String pid){
        Map<String, Object> map = new HashMap<>();
        List<Paramter> paramterByPid = service.findParamterByPid(pid);
       StringBuffer stringBuffer=new StringBuffer();
             stringBuffer.append("<option value='' selected>请选择</option>");
        for (Paramter paramter: paramterByPid
             ) {
            stringBuffer.append("<option value=\""+paramter.getId()+"\">"+paramter.getName()+"</option>");
        }
        map.put("s2Str",stringBuffer.toString());
        map.put("s3Str",stringBuffer.toString());
        return map;
    }


    @RequestMapping(value = "tolist",method = RequestMethod.GET)
    public ModelAndView toList(String pid){
        ModelAndView modelAndView = new ModelAndView();
        List<Paramter> paramterByPid = service.findParamterByPid(pid);
        StringBuffer stringBuffer=new StringBuffer();
        //拼接第一个下拉菜单
        stringBuffer.append("<select id='s1' onchange='findcity()'>");
        stringBuffer.append("<option value=\"\" selected>请选择</option>");
        for (Paramter paramter: paramterByPid
                ) {
            System.out.println(paramter);
            stringBuffer.append("<option value=\""+paramter.getId()+"\">"+paramter.getName()+"</option>");
        }
        stringBuffer.append("</select>");
        //拼接第二个下拉菜单
        stringBuffer.append("<select id=\"s2\" onchange=\"findqu()\">\n" +
                "    <option value=\"\" selected>请选择</option>\n" +
                "\n" +
                "</select>");
        //拼接第三个下拉菜单
        stringBuffer.append("<select id=\"s3\" onchange=\"findjie()\">\n" +
                "    <option value=\"\" selected>请选择</option>\n" +
                "\n" +
                "</select>");
       modelAndView.addObject("s1Str",stringBuffer.toString());
        modelAndView.setViewName("list");
        return modelAndView;
    }
}