在实体类中 加入

@JsonInclude(JsonInclude.Include.NON_NULL)

package com.test.vo;
import com.fasterxml.jackson.annotation.JsonInclude;

@JsonInclude(JsonInclude.Include.NON_NULL)

public class RoutesVo {

    private String path;
    private String component;
    
      public String getPath() {
        return path;
    }
    public void setPath(String path) {
        this.path = path;
    }
    public String getComponent() {
        return component;
    }