Spring boot 复杂参数传递 @RequestBody

在多条件查询的表格场景中，因为需要传递的参数较多，@RequestParam需要更多的代码量，所以我个人采用@RequestBody的方式传递

Controller中:

    @ResponseBody
    @PostMapping("/users")
    public Page<User> findAll(@RequestBody QueryParams queryParams) {
        return userService.findAll(queryParams);;
    }

实体类:

public class QueryParams {
    private int pageSize = 0;
    private int pageNumber = 15;
    private String searchText = "";
    private String sortName = "date";
    private String sortOrder = "desc";
    private List<Condition> conditions = Collections.emptyList();

    // get set 方法省略...
}

    // 多重条件选择对象
public class Condition {
    private String field;
    private String comparison;
    private String input;
    
    // get set 方法省略...
}

但访问该请求时，有可能会出现这样的错误:

com.fasterxml.jackson.databind.exc.InvalidDefinitionException:
Cannot construct instance of `com.xxx.domain.QueryParams` 
(no Creators, like default construct, exist): 
cannot deserialize from Object value (no delegate- or property-based Creator)
 at [Source: (PushbackInputStream); line: 1, column: 2]

遇到这种情况，请把使用@RequestBody的实体类的全部构造参数删除，包括其嵌套的实体类(QueryParams 类中嵌套的 Condition)。

删除之后，运行正常。