1)如果前端传的是json,后端接受时要用@RequestBody注解,json对象要与实体类对应

 

1 public boolean updateKnowledge(@RequestBody Knowledge knowledge){
2         return knowledgeService.updateKnowledge(knowledge);
3     }

 

如果json没有与实体类对应的话,可以有另外一种方法,利用JSONObject对象取值,可以直接转换成你需要的类型,这里仅展示string类型

 

1 public int deleteKnowledge(@RequestBody JSONObject obj){
2         return knowledgeService.deleteKnowledge(obj.getString("id"));
3     }

 

2)如果前端传的是form-data,后端接受时要用@RequestParam注解,表单的key也要与实体类的字段对应

 

public void downloadFile( @RequestParam("groupName") String groupName,@RequestParam("url") String url, HttpServletResponse response) throws IOException {
2         MyFile myFile = new MyFile();
3         myFile.setGroupName(groupName);
4         myFile.setUrl(url);
5        myFileService.downloadFile(myFile,response);
6     }