在在springnvc/springboot中，我們知道如用HTTP POST方法來寫REST 呼叫，則@RequestBody是不允許有多個的，比如下面的宣告是無效的。

@RequestMapping(value = "/updateInsert", method = RequestMethod.POST, produces = "application/json")
@ResponseStatus(value = HttpStatus.OK)
@ResponseBody
public String updateInsert(@RequestBody ActivitiBpm old,@RequestBody ActivitiBpm new ) {

....

}
 

那如果來實現同樣的功能呢？ 一個方法就是要利用HashMap

 @RequestMapping(value = "/updateInsert", method = RequestMethod.POST, produces = "application/json")
    @ResponseStatus(value = HttpStatus.OK)
    @ResponseBody
    public String updateInsert(@RequestBody HashMap<String,ActivitiBpm> data) {
        ActivitiBpm oldentity=data.get("oldValue");
        ActivitiBpm newentity=data.get("newValue");
        .....
    }
 

  輸入的jason資料格式如下： 

{
"oldValue" : { "name" : "bigtree103"},
"newValue" : { "name" : "bigtree103","createTime" : "2018-08-23 8:16:22" }
}