<div class="user-avatar">
   <a href="/user/${vo.user.id}">
      <img width="32" class="img-circle" th:src="${vo.user.headUrl}">
   </a>
</div>

private String headUrl;

public User() {}

public User(String name) {
    this.name = name;
    this.password = "";
    this.salt = "";
    this.headUrl = "";
}

public String getHeadUrl() {
    return headUrl;
}

public void setHeadUrl(String headUrl) {
    this.headUrl = headUrl;
}

@Test
public void contextLoads() {
    Random random = new Random();
    for (int i = 1; i < 10; i++) {
        User user = new User();
        user.setHeadUrl(String.format("http://images.nowcoder.com/head/%dt.png", random.nextInt(100)));
        user.setName(String.format("USER%d", i));
        user.setPassword(String.format("PASSWORD--%d",i*i));
        user.setSalt(String.format("SALT %d HelloWorld",i*5+20));
        userDao.addUser(user);
    }
}

@RequestMapping(path = {"/", "/index"}, method = {RequestMethod.GET,RequestMethod.POST})
public String index(Model model){
    List<News> newsList = newsService.getLatesNews(0, 0,10);

    List<Map> vos = new ArrayList<>();
    for(News news :newsList){
        Map<String, Object> vo = new HashMap<String, Object>();
        vo.put("news",news);
        vo.put("user", userService.getUser(news.getUserId()));
        vos.add(vo);
    }

    model.addAttribute("vos", vos);
    return "home.html";
}

public class UserService {
@Autowired
private UserDao userDao;

public User getUser(int id)
    return userDao.selectById(id);}