gson解析Java对象中包含对象集合不执行问题

Question

当Gson解析Java对象中包含对象集合时，后面代码不执行
对象：

    private long user_id;                                         
private String user_name;                                       
private String user_password;                                   
private Date user_date;                                        
private int age;                                               
private String email;                                         
private String phone;                                           
private String user_sex;                                        
private Timestamp user_registDate;                             
private String user_vip;                                        
private Timestamp user_vipDate;                                 
private String user_head;                                       
private Set<IpAddress> user_ips = new HashSet<IpAddress>();

    解析代码：


Query query = session.createQuery("from  UserInfo  as u where u.phone=?0 and u.user_password=?1");
 query.setParameter(0, userInfo.getPhone());
 query.setParameter(1, Crypto.encryption(userInfo.getUser_password()));

UserInfo user = (UserInfo) query.uniqueResult();
     JsonObject json = new JsonObject();
    String us = gson.toJson(user);

    执行到String us = gson.toJson(user);这句时，当Ste<IpAddress>的值为一个时正常执行，当Set<IpAddress>值为多个时后面的代码不执行。

Answer 1

https://blog.csdn.net/zhangzehai2234/article/details/77886284