/**
 * 根据order对User排序
*/
public class User { //此处无需实现Comparable接口
    private String name;
     private Integer order;
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public Integer getOrder() {
         return order;
     }
     public void setOrder(Integer order) {
         this.order = order;
     }
 }