spring mvc 接收复杂参数

Question

page类
public class Page {

private int page;

private int size;

public int getPage() {
    return page;
}

public void setPage(int page) {
    this.page = page;
}

public int getSize() {
    return size;
}

public void setSize(int size) {
    this.size = size;
}

}

QueryDto
public class Query {
private Page page;

public Page getPage() {
    return page;
}

public void setPage(Page page) {
    this.page = page;
}

}
控制器
@ResponseBody
@RequestMapping(value = "/index",method = RequestMethod.POST)
public Query index(@RequestBody Query query) {
return query;
}

报错
2022-10-19 15:02:06.787 WARN 19688 --- [nio-8888-exec-6] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public com.wanhuiyan.bean.Query com.wanhuiyan.controller.Test.index(com.wanhuiyan.bean.Query)]

这个是为啥

Answer 1

后端来看没得问题，前端发送的JSON格式你参考下我这个。

{
    "page":{
        "page": 12,
        "size": 12
    }
}

估计你是忘记了，你的Query对象里Page的名字叫 page。

Answer 2

果不其然就是这个问题