I'm trying to display data from a database in a spring application.
<div class="container-fluid">
<h1>Welcome</h1>
<p>Some text</p>
</div>
<ul>
<!--/#thymesVar id="film" type="java.util.List<com.example.project1.accessToData.model.Film>"/-->
<li th:each ="film:${film}">
<span th:text="${film}"></span>
</li>
</ul>
public FilmIndexControler(FilmService filmService) {
this.filmService = filmService;
}
#GetMapping
String showFilms(Model model){
Iterable<Film> film = filmService.findAll();
model.addAttribute("film",film);
return "index";
}
public class Film {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#NotEmpty(message="Cant be empty")
private String title;
#DateTimeFormat(pattern = "yyyy-MM-dd")
private LocalDate productionYear;
private String descryption;
#NotEmpty (message="Cant be empty")
private String link}
public Iterable<Film> findAll () {
return this.filmRepository.findAll();
}
When I try to display it on the site, nothing related to the spring happens. I can't see films in html.
#RestController
#RequestMapping("/api/film")
public class FilmApi {
private static final Logger logger = LoggerFactory.getLogger(FilmApi.class);
private final FilmManager filmManager;
#Autowired
public FilmApi(final FilmManager filmManager) {
this.filmManager = filmManager;
}
#GetMapping(value = "/lista",params = {"!sort", "!page", "!size"} )
public ResponseEntity<Iterable<Film>> getAll(){
logger.warn("Lista filmów");
return ResponseEntity.ok(this.filmManager.findAll());
}
#GetMapping
public ResponseEntity<List<Film>> findFilm(#Param("title") String title){
return ResponseEntity.ok(this.filmManager.findFilm(title));
}
#PostMapping
public ResponseEntity<Film> addFilm(#RequestBody Film film){
this.filmManager.save(film);
return ResponseEntity.noContent().build();
}
#PutMapping("/{id}")
public ResponseEntity<?> updateFilm(#PathVariable Long id,#RequestBody Film film){
if (!this.filmManager.exist(id)){
return ResponseEntity.notFound().build();
}
film.setId(id);
this.filmManager.save(film);
return ResponseEntity.noContent().build();
}
#DeleteMapping
public void deleteFilm(#RequestParam Long index){
if (!this.filmManager.exist(index)){
ResponseEntity.notFound().build();
}
this.filmManager.deleteById(index);
ResponseEntity.noContent().build();
}
}
Ok I added api controller. When I enter localhostapi:8080/api/film/lista, all data is displayed If you need anything else, I will add it soon.
change variable name from film to films in controller:
model.addAttribute("films",film);
and in html file :
<li th:each ="film: ${films}">
Related
I connected my bat to the database.
I mapped it to view the contents in HTML,
but typing url(/index) in the address bar, I can only see the contents of the table.
What is the problem?
public class Controller {
#Autowired
noticeService ns;
#RequestMapping(value="/index", method = RequestMethod.GET)
public ModelAndView index (HttpServletRequest request) {
ModelAndView mav = new ModelAndView();
List<noticeModel>noticeList = ns.getNotice();
mav.addObject("noticeList", noticeList);
mav.setViewName("index"); // HTML ADDRESS
return mav;
}
}
#Builder #Data
public class noticeModel {
private int notice_id;
private String notice_tilte;
private String notice_name;
private Date notice_created_date;
private Date notice_revised_date;
private String notice_text;
private String notice_pw;
}
#Service
public class noticeService {
#Autowired
public noticeMapper mapper;
public List<noticeModel> getNotice() {
return mapper.getNotice();
}
}
#Repository
#Mapper
public interface noticeMapper {
List<noticeModel> getNotice();
}
I'm new to Spring Boot. I have a mysql database, I use a query to count row in my table. But it's not work, it still return my original table data. Can you help me check my code.
Here is my Entity:
#Entity
#Table(name = "act_id_membership", schema = "activiti", catalog = "")
#IdClass(ActIdMembershipEntityPK.class)
public class ActIdMembershipEntity {
private String userId;
private String groupId;
#Id
#Column(name = "USER_ID_")
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
#Id
#Column(name = "GROUP_ID_")
public String getGroupId() {
return groupId;
}
public void setGroupId(String groupId) {
this.groupId = groupId;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ActIdMembershipEntity that = (ActIdMembershipEntity) o;
return Objects.equals(userId, that.userId) &&
Objects.equals(groupId, that.groupId);
}
#Override
public int hashCode() {
return Objects.hash(userId, groupId);
}
}
Here is my query:
#Repository
public interface MemershipRepository extends JpaRepository<ActIdMembershipEntity, String> {
#Query ("select new com.example.activiti_restful.dtos.UserMembership(i.userId, count(i)) from ActIdMembershipEntity i where i.userId ='kermit'")
UserMembership countMemberships(String userId);
}
Updated code:
My service class:
#Service
public class MembershipService {
#Autowired
private MemershipRepository repository;
public long count() {
return repository.count();
}
My resource class:
#RestController
public class MembershipResource {
#Autowired
private MembershipService membershipService;
#GetMapping("/membership")
public long list() {return membershipService.count();}
}
My custom JSON Object class:
public class UserMembership {
private String userId;
private long numberOfusers;
public UserMembership(String userId, long numberOfusers) {
this.userId = userId;
this.numberOfusers = numberOfusers;
}
}
MySQL Table:
act_id_membership
According repositories documentation using CrudRepository provides a method called count() that is one of the Superinterfaces which JpaRepository is implemented.
Based CrudRepository documentation says:
long count(); Returns the number of entities.
Then you should use CrudRepository method. In addition Remove Uppercase MembershipREPOSITORY, by java code convention, you have to use by following way MembershipRepository.
#Repository
public interface MembershipRepository extends JpaRepository <ActIdMembershipEntity, String> {
}
And use it in your Service:
#Service
public class MembershipService {
#Autowired
private MembershipRepository repo;
public long count() {
return repo.count();
}
}
UPDATED
Based on your requirement:
In Controller:
#RestController
public class MembershipResource {
#Autowired
private MembershipService membershipService;
#GetMapping("/membership")
public List<Object> list() { return membershipService.countMemberships();
}
}
In Service:
#Service
public class MembershipService {
#Autowired
private MemershipRepository repository;
public List<Object> countMemberships() {
return repository.countMemberships();
}
}
In Repository:
#Repository
public interface MemershipRepository extends JpaRepository<ActIdMembershipEntity, String> {
#Query ("select i.userId, count(i) from ActIdMembershipEntity i where i.userId ='kermit'")
List<Object> countMemberships();
}
*> Actually I want it return a json format like [{ name: kermit, value:6}]. Now it just return a number 6 only. How I can do that? Thank you!
First, create a class to wrap your data:
public class UserMembership {
private String userId;
private long numberOfUsers;
public UserMembership(String userId, long numberOfUsers) {
this.userId = userId;
this.numerOfUsers = numberOfUsers;
}
}
Then
#Repository
public interface MembershipRepository extends JpaRepository <ActIdMembershipEntity, String> {
#Query ("select new *****.UserMembership(i.userId, count(i)) from ActIdMembershipEntity i where i.userId = :userId")
UserMembership countMemberships(String userId);
}
*****: your full package name
Hope it help!
I am new to Dropwizard and so far everything was going well till I started messing with Hibernate and MySQL. My problem is: Hibernate won't create tables and consequently no columns in my DB.
The only warning I get when running my jar file is:
org.hibernate.cfg.environment hibernate.properties not found
But do I need it at all? As I am having all configuration and mapping already.
Here is my application class:
public class LibraryApplication extends Application<LibraryConfiguration> {
public static void main(String[] args) throws Exception {
new LibraryApplication().run(args);
}
#Override
public String getName() {
return "hello backend";
}
private final HibernateBundle<LibraryConfiguration> hibernate = new HibernateBundle<LibraryConfiguration>(Book.class){ //more entities can be added separated with a coma
public DataSourceFactory getDataSourceFactory(LibraryConfiguration configuration) {
return configuration.getDataSourceFactory();
}
};
#Override
public void initialize(Bootstrap<LibraryConfiguration> bootstrap) {
bootstrap.addBundle(new AssetsBundle("/webapp", "/", "index.html", "static"));
bootstrap.addBundle(hibernate);
}
#Override
public void run(LibraryConfiguration configuration,
Environment environment) {
final BookDAO dao = new BookDAO(hibernate.getSessionFactory());
final TestResource resource = new TestResource(
configuration.getTemplate(), configuration.getDefaultName());
final TemplateHealthCheck healthCheck = new TemplateHealthCheck(
configuration.getTemplate());
environment.healthChecks().register("template", healthCheck); //register the health check
environment.jersey().register(resource); //register the resource class
environment.jersey().register(new BookResource(dao));
}
}
YAML file:
server:
type: simple
rootPath: '/api/*'
applicationContextPath: /
connector:
type: http
port: 8080
template: Hello, %s!
defaultName: back-end
database:
# the name of your JDBC driver
driverClass: com.mysql.jdbc.Driver
# the JDBC URL
url: jdbc:mysql://localhost:3306/books
# the username
user: root
# the password
password: root
# any properties specific to your JDBC driver:
properties:
charSet: UTF-8
hibernate.dialect: org.hibernate.dialect.MySQLDialect #org.hibernate.dialect.MySQL5InnoDBDialect
hibernate.hbm2ddl.auto: create
Configurtion class:
public class LibraryConfiguration extends Configuration{
#Valid
#NotNull
#JsonProperty
private DataSourceFactory database = new DataSourceFactory();
#JsonProperty("database")
public DataSourceFactory getDataSourceFactory() {
return database;
}
#NotEmpty
private String template;
#NotEmpty
private String defaultName = "";
#JsonProperty
public String getTemplate() {
return template;
}
#JsonProperty
public void setTemplate(String template) {
this.template = template;
}
#JsonProperty
public String getDefaultName() {
return defaultName;
}
#JsonProperty
public void setDefaultName(String name) {
this.defaultName = name;
}
}
and my entity:
#Entity
#Table(name = "book")
#NamedQueries({
#NamedQuery(
name = "library.core.Book.findAll",
query = "SELECT b FROM book b"
)
})
public class Book{
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column
private Long id;
#Column(name = "title")
#NotNull
private String title;
#Column(name = "author")
#NotNull
private String author;
#Column(name = "date")
private long date;
#Column(name = "description")
private String description;
#Column(name = "image")
private String image;
public Book(String title, String author){
this.title = title;
this.author = author;
}
#JsonProperty
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
#JsonProperty
public Long getId() {
return id;
}
#JsonProperty
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
#JsonProperty
public long getDate() {
return date;
}
public void setDate(long date) {
this.date = date;
}
#JsonProperty
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
#JsonProperty
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public void setId(Long id) {
this.id = id;
}
}
I have already been to many tutorials but none of them really explains how to configure hibernate. Thank you in advance.
I have finally solved this problem, which was not a big deal actually. Just a small mistake as it was expected.
My problem was a Book class, IDE automatically imported the java library called Book in the LibraryApplication class, so DB was not mapping it.
On the other hand, in the Book class the named query should be as follows:
#NamedQuery(
name = "library.core.Book.findAll",
query = "SELECT b FROM Book b"
)
My mistake: I was writing Book with small letter.
Apache camel is using a route wich is listening to a specific url. the json from this url is then transformed to pojo classes and inserted in a mySQL database. Everything is working fine, except my foreign key still remains null. I'm using spring framework btw.
Here is the url where you can find the data:
https://builds.apache.org:443/job/Accumulo-1.5/api/json
Here is my routedefinition for camel
#Component
public class JenkinsConfigurationRouteBuilder extends SpringRouteBuilder {
private Logger logger = LoggerFactory.getLogger(JenkinsConfigurationRouteBuilder.class);
#Override
public void configure() throws Exception {
logger.info("Configuring route");
//Properties die hij niet vindt in de klasse negeren
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
DataFormat jenkinsConfigFormat = new JacksonDataFormat(objectMapper, JenkinsConfiguration.class);
from("timer://foo?fixedRate=true&delay=0&period=200000&repeatCount=1")
.routeId("jsonToJenkinsConfiguration")
.setHeader(Exchange.HTTP_METHOD, constant("GET"))
.to("https://builds.apache.org:443/job/Accumulo-1.5/api/json")
.convertBodyTo(String.class)
.unmarshal(jenkinsConfigFormat) //instance van JenkinsConfiguration
.log(LoggingLevel.DEBUG, "be.kdg.teamf", "Project: ${body}")
.to("hibernate:be.kdg.teamf.model.JenkinsConfiguration");
}
}
My POJO class
#Entity(name = "jenkinsConfiguration")
public class JenkinsConfiguration extends Configuration implements Serializable {
#Column
#JsonProperty("displayName")
private String name;
#JsonProperty("healthReport")
#JsonIgnore
#LazyCollection(LazyCollectionOption.FALSE)
#OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, mappedBy = ("jenkinsConfig"))
private Collection<HealthReport> healthReport;
#JsonProperty("builds")
#JsonIgnore
#LazyCollection(LazyCollectionOption.FALSE)
#OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, mappedBy = ("jenkinsConfig"))
private Collection<Build> builds;
#JsonProperty("modules")
#JsonIgnore
#LazyCollection(LazyCollectionOption.FALSE)
#OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, mappedBy = ("jenkinsConfig"))
private Collection<Module> modules;
public JenkinsConfiguration() {
}
public JenkinsConfiguration(Collection<Build> builds, Collection<HealthReport> healthReport, Collection<Module> modules, String name) {
this.builds = builds;
this.healthReport = healthReport;
this.modules = modules;
this.name = name;
}
public Collection<Build> getBuilds() {
return builds;
}
public Collection<HealthReport> getHealthReport() {
return healthReport;
}
public Collection<Module> getModules() {
return modules;
}
public String getName() {
return name;
}
public void setBuilds(Collection<Build> builds) {
this.builds = builds;
}
public void setHealthReport(Collection<HealthReport> healthReport) {
this.healthReport = healthReport;
}
public void setModules(Collection<Module> modules) {
this.modules = modules;
}
public void setName(String name) {
this.name = name;
}
#Override
public String toString() {
return ToStringBuilder.reflectionToString(this);
}
}
Let us take the builds for instance.
As you can see, this pojo class contains a list from builds. A JenkinsConfiguration can contain more builds. One build belongs to one JenkinsConfiguration.
This is my Build class:
#XmlRootElement(name = "builds")
#Entity(name = "build")
public class Build implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int Id;
#Column
#JsonProperty("number")
private Integer number;
#Column
#JsonProperty("url")
private String url;
#JsonBackReference
#OnDelete(action = OnDeleteAction.CASCADE)
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "jenkinsConfig")
private JenkinsConfiguration jenkinsConfig;
public Build() {
}
public Build(JenkinsConfiguration jenkinsConfig, Integer number, String url) {
this.jenkinsConfig = jenkinsConfig;
this.number = number;
this.url = url;
}
public int getId() {
return Id;
}
public JenkinsConfiguration getJenkinsConfig() {
return jenkinsConfig;
}
public Integer getNumber() {
return number;
}
public String getUrl() {
return url;
}
public void setId(int id) {
Id = id;
}
public void setJenkinsConfig(JenkinsConfiguration jenkinsConfig) {
this.jenkinsConfig = jenkinsConfig;
}
public void setNumber(Integer number) {
this.number = number;
}
public void setUrl(String url) {
this.url = url;
}
}
My question: how come that my foreign key is not set for the build class? it remains null.
Doe I need to update it manually or something? If so, how do I do that in spring?
Any help would me much appreciated!
Fixed it by updating the records in my database like so:
Camel:
from("hibernate:be.kdg.teamf.model.Build?delay=1s")
.routeId("buildFkBuild")
.startupOrder(3)
.shutdownRunningTask(ShutdownRunningTask.CompleteAllTasks)
.to("bean:buildFK?method=processBuild")
.log(LoggingLevel.DEBUG, "be.kdg.teamf", "Project: ${body}")
.to("hibernate:be.kdg.teamf.model.Build");
Bean:
#Consumed
public Build processBuild(Build build) {
//updaten van foreign key
build.setJenkinsConfig(jenkinsConfiguration);
return build;
}
I used Eclipselink MOXy to convert my POJO(using JPA) to json. and it's work.
but i have one problem. I have pojo class MAccount contain many to one relation to class MProduct,. when I convert to json, result show that class MAccount not in class MProduct.
here my class MAccount implementation:
#XmlRootElement
#Entity
#Table(name="m_account")
public class MAccount extends BaseObject implements Serializable {
private static final long serialVersionUID = UUID.randomUUID().getMostSignificantBits();
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#XmlID
private Long id;
#Column(name="account_id")
private String accountId;
#Column(name="card_number")
private String cardNumber;
//bi-directional many-to-one association to Product
#ManyToOne
#JoinColumn(name="m_product_id")
#XmlIDREF
private MProduct mProduct;
public MCustomerAccount() {
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getAccountId() {
return this.accountId;
}
public void setAccountId(String accountId) {
this.accountId = accountId;
}
public MProduct getMProduct() {
return this.mProduct;
}
public void setMProduct(MProduct mProduct) {
this.mProduct = mProduct;
}
// Imlement base object method
...
}
here my class MProduct implementation:
#XmlRootElement
#Entity
#Table(name="m_product")
public class MProduct extends BaseObject implements Serializable {
private static final long serialVersionUID = UUID.randomUUID().getMostSignificantBits();
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#XmlID
private Long id;
#Column(name="product_code")
private String productCode;
#Column(name="product_name")
private String productName;
//bi-directional many-to-one association to MAccount
#OneToMany(mappedBy="mProduct")
#XmlInverseReference(mappedBy="mProduct")
private Set<MAccount> mAccountList;
public MProduct() {
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getProductCode() {
return this.productCode;
}
public void setProductCode(String productCode) {
this.productCode = productCode;
}
public String getProductName() {
return this.productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public Set<MAccount> getMAccountList() {
return this.mAccountList;
}
public void setMAccountList(Set<MAccount> mAccountList) {
this.mAccountList = mAccountList;
}
// Imlement base object method
...
}
And generate JSON from MAccount class
{"MAccount":[
{"#type":"mAccount","id":"6","accountId":"05866039901"},
{"#type":"mAccount","id":"7","accountId":"25600036290"}]
}
there is no MProduct in there, the correct json result should be like below
{"MAccount":[
{"#type":"mAccount","id":6,"accountId":"05866039901","MProduct":{"#type":"mProduct","productCode":"T01","productName":"Book"}},
{"#type":"mAccount","id":7,"accountId":"25600036290","MProduct":{"#type":"mProduct","productCode":"T02","productName":"Pen"}}]
}
Is Anyone know how to solve this problem
Thank's b4
Because you are annotating the field, there is a chance that JPA has not populated that field yet due to lazy loading. If you annotate the property (get/set) instead do you still see this behaviour?
For more information on #XmlInverseReference see:
http://bdoughan.blogspot.com/2010/07/jpa-entities-to-xml-bidirectional.html