在Java中有時候需要傳list，這時候可以傳字符串，后臺接收字符串后轉換成對應的對象list，具體實現(xiàn)如下：

方法一

1.在controller中：

@PostMapping("/api/classes/add")public Result classesAdd(Integer lineId, String params,String param){try {List<Classes> classesList = JSONArray.parseArray(params, Classes.class);List<Classes> classes = JSONArray.parseArray(param, Classes.class);//根據(jù)線路id查詢線路信息Line line = lineService.getDao().findById(lineId);if(null==line){return Result.fail(902,"該班次對應的線路不存在！");}//創(chuàng)建班次對象并保存到數(shù)據(jù)庫for (Classes s:classesList) {s.setLine(line);classesService.getDao().save(s);}for (Classes s:classes) {s.setLine(line);classesService.getDao().save(s);}return Result.ok("新增班次成功");}catch (Exception e){e.printStackTrace();return Result.fail(901,"新增班次失敗");}}

2.使用postman測試接口，如下：

?

方法二

1.在controller中代碼如下：

@PostMapping("/api/classes/add")public Result classesAdd(String params,HttpServletRequest request){try {JSONObject jsonObject = JSONObject.parseObject(params);Integer lineId = (Integer) jsonObject.get("lineId");JSONArray obj = (JSONArray) jsonObject.get("params");JSONArray param = (JSONArray) jsonObject.get("param");//獲取當前操作用戶idString userid = tokenService.valid(request.getHeader("token"));//根據(jù)線路id查詢線路信息Line line = lineService.getDao().findById(lineId);if(null==line){return Result.fail(902,"該班次對應的線路不存在！");}//創(chuàng)建班次對象并保存到數(shù)據(jù)庫for (Object s:obj) {JSONObject object = (JSONObject) JSON.toJSON(s);Classes build = Classes.builder().line(line).seatNum((Integer) object.get("seatNum")).isOrder(object.get("isOrder").equals(0) ? false : true).direction((String) object.get("direction")).firstTime((String) object.get("firstTime")).laterTime((String) object.get("laterTime")).build();classesService.getDao().save(build);}for (Object s:param) {JSONObject object = (JSONObject) JSON.toJSON(s);Classes build = Classes.builder().line(line).seatNum((Integer) object.get("seatNum")).isOrder(object.get("isOrder").equals(0) ? false : true).direction((String) object.get("direction")).firstTime((String) object.get("firstTime")).laterTime((String) object.get("laterTime")).build();classesService.getDao().save(build);}return Result.ok("新增班次成功");}catch (Exception e){e.printStackTrace();return Result.fail(901,"新增班次失敗");}}

?2.使用postman測試接口，結果如下：

上圖中params的完整數(shù)據(jù)如下：

{"lineId":1,"params":[{"firstTime":"09:41","laterTime":"09:42","seatNum":1,"isOrder":0,"direction":"forward"}],"param":[{"firstTime":"09:41","laterTime":"09:42","seatNum":1,"isOrder":0,"direction":"reverse"}]}

?

總結

以上是生活随笔為你收集整理的java实现接收字符串对象并在后台代码中转成list对象的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內容還不錯，歡迎將生活随笔推薦給好友。