我對正確的 mvc 模式有點困惑。
這是我的組態檔：在這個類中我有所有的 Bean。
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = " name.web.controller")
@PropertySource("classpath:NewLibrary.properties")
@EnableTransactionManagement
@Bean
public UserRepo getUserService() {
return new UserImpl(getDataSource());
}
@Bean
public BookRepo getBookService() {
return new BookImpl(getDataSource());
}
這是我的介面 UserRepo 和介面 UserService。他們是一樣的
public interface UserService {
public String getUser();
void add(UserModel u);
UserModel getById(int id);
UserModel getByName(String name);
UserModel getByCognome(String surname);
Optional<UserModel> findOne(int id);
public void insert(User u);
public String giveName();
List<UserModel>ByNome(String nome);
List<UserModel> ByPassAndUsername(String password, String username);
}
我的班級實作了這個介面
@Repository
public class UserImpl extends AbstractDao<UserModel, Integer> implements UserRepo {
@PersistenceContext
private EntityManager em;
@Autowired
public UserRepo userRepo;
private JdbcTemplate conn;
@Override
@Transactional
public void add(UserModel u) {
em.persist(u);
}
public UserImpl(DataSource ds) {
conn= new JdbcTemplate(ds);
}
@Override
public UserModel getById(int id) {
return em.find(UserModel.class, id);
}
@Override
public UserModel getByName(String nome) {
CriteriaBuilder queryBuilder= em.getCriteriaBuilder();
CriteriaQuery<UserModel> query=
queryBuilder.createQuery(UserModel.class);
Root<UserModel> rec= query.from(UseriModel.class);
query.select(rec).where(queryBuilder.equal(rec.get("nome"), nome));
UserModel ut=em.createQuery(query).getSingleResult();
em.clear();
return ut;
//return em.find(UtentiModel.class, nome);
};
最后我有我的控制器在我的控制器中我 @Autowired UsersRepo/這是一個介面/。我的代碼有效，我可以執行所有 CRUD 操作。
但是，有人告訴我這不是正確的方法。我不能直接自動裝配。@Autowired 的 UserRepo，在 Controller 類中。所以我在網上搜索資訊，我創建了一個服務類。服務是這樣制作的：具有與我在 UserRepo Inteface 中撰寫的相同方法的相同介面。在創建實作該介面的類之后，稱為 UserServiceImpl。
In userServiceImpl I go to @Autowire UserRepo interface, and after I go to @Autowire userService inside the Controller.
But now my code doesn't work, Ive got 404 status in all pages in all Controlles: `The requested resource [/bookProject/] is not available
Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.`
I've got no errors inside Console, just info:
INFO: Command line argument: -Dfile.encoding=UTF-8
set 30, 2021 5:41:10 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The Apache Tomcat Native library which allows using OpenSSL was not found on the java.library.path: [/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib]
set 30, 2021 5:41:10 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-nio-8080"]
set 30, 2021 5:41:10 PM org.apache.catalina.startup.Catalina load
INFO: Server initialization in [624] milliseconds
set 30, 2021 5:41:10 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service [Catalina]
set 30, 2021 5:41:10 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet engine: [Apache Tomcat/9.0.50]
set 30, 2021 5:41:12 PM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
set 30, 2021 5:41:12 PM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
set 30, 2021 5:41:12 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory [/home/viktoriya/Scrivania/apache-tomcat-9.0.50/webapps/ROOT]
set 30, 2021 5:41:12 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory [/home/viktoriya/Scrivania/apache-tomcat-9.0.50/webapps/ROOT] has finished in [13] ms
set 30, 2021 5:41:12 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-nio-8080"]
set 30, 2021 5:41:12 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in [2050] milliseconds
So I can not understand if I'm wrong to Autowire some bean, or if my current pattern is wrong, or if I need to change something in the config class, or if I have not applied the class of service well. Beacuse before my code was working well.
This is my controller: @Controller public class UserController { @Autowired private UserService us; List user; @GetMapping("/new") public ModelAndView new(Model model) {
UserModel users= new UserModel();
model.addAttribute("utenteForm", user);
return new ModelAndView("client", "utenteForm", new
UtentiModel());
}
@PostMapping("/add")
public ModelAndView sumbit(@ModelAttribute("utenteForm") UserModel users)
{ us.ad(users);
And this is UserServiceImpl:
@Service
public class UserServiceImpl implements UserService{
private final static Logger log=
Logger.getLogger(UserServiceImpl.class.getName());
@Autowired
private UserRepo userRepo;
@PersistenceContext
private EntityManager em;
@Override
public void add(UserModel u) {
userRepo.add(u);
}
@Override
public UserModel getByName(String name) {
return userRepo.getByName(name);
}
uj5u.com熱心網友回復：
我會說檢查您針對控制器定義呼叫的路徑。我認為如果您更新代碼以查看控制器會有所幫助。
例子：
@RestController
@RequestMapping("/test")
public class TestRestController{
@Autowired
private TestService testService;
.....
}
@Service
public class TestServiceImpl implements TestService {
@Autowired
private TestRepository testRepository;
}
@Repository
@Transactional
public class TestRepositoryImpl implements TestRepository{
}
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標籤：java spring spring-mvc model-view-controller javabeans