前端向后端传对象数组--方式一

1.定义一个键值对对象 function ObjData(key,value){ this.key=key; this.value=value; }

2.定义一个对象数据 var existUserArray=[]; //定义一个对象数据。 遍历map，构造对象，写入对象数组中。 existUserMap.forEach(function (item, key, mapObj) { var s=new ObjData(key,item); //创建键值对象 existUserArray.push(s); //把对象放入对象数组中 });

3.把数组转换成json字符串。 var existUserStr = JSON.stringify(existUserArray);

4.使用post提交数据 var data = { "existUserStr": existUserStr }; $.post( "saveUsers", data, function (ret) { (ret); }, "Json" //important ); //post

5.java后端处理 @RequestMapping(value = "/saveUsers", method = RequestMethod.POST) @ResponseBody public Map<String, String> saveUsers(Model model, String existUserStr, String selectedUserStr) { Map<String, String> result = Maps.newHashMap(); String msg = "成功！"; String success = "true"; try { List<ObjData> existUserList = JsonMapper.fromJson(existUserStr, List.class, ObjData.class); List<ObjData> selectedUserList = JsonMapper.fromJson(selectedUserStr, List.class, ObjData.class); System.out.println(); } catch (Exception e) { log.warn("", e); msg = "失败 "; success = "false"; }

result.put("success", success); result.put("message", msg); return result; }

6.附上jsonmapper的fromjson方法. // @SuppressWarnings("unchecked") public static <T> T fromJson(String json, Class<?> collectionClass, Class<?>... elementClasses) { if (json==null||json.trim().isEmpty()) { return null; }

try { JavaType type = JsonMapper.getInstance().getTypeFactory().constructParametricType(collectionClass, elementClasses); return (T) JsonMapper.getInstance().readValue(json, type); } catch (IOException e) { logger.warn("parse json string error:" + json, e); e.printStackTrace(); return null; } }