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@RestController
public class TopicController {
@Autowired
private TopicService topicService;
@RequestMapping(value="/topics", method= RequestMethod.GET)
public List<Topic> getAllTopics(){
return topicService.getAllTopics();
}
@RequestMapping(value="/topics/{id}", method= RequestMethod.GET)
public Topic getTopic(@PathVariable String id){
return topicService.getTopic(id);
}
@RequestMapping(value="/topics", method= RequestMethod.POST)
public void addTopic(@RequestBody Topic topic){
topicService.addTopic(topic);
}
@RequestMapping(value="/topics/{id}", method= RequestMethod.PUT)
public void updateTopic(@RequestBody Topic topic, @PathVariable String id){
topicService.updateTopic(id, topic);
}
@RequestMapping(value="/topics/{id}", method= RequestMethod.DELETE)
public void deleteTopic(@PathVariable String id){
topicService.deleteTopic(id);
}
}
Controller类的列表POST项目春季启动
@Service
public class TopicService {
@Autowired
private TopicRepository topicRepo;
public List<Topic> getAllTopics(){
return (List<Topic>)topicRepo.findAll();
}
public Topic getTopic(String id){
return topicRepo.findOne(id);
}
public void addTopic(Topic topic){
//topics.add(topic);
topicRepo.save(topic);
}
public void updateTopic(String id, Topic topic) {
topicRepo.save(topic);
}
public void deleteTopic(String id) {
//topics.removeIf(t -> t.getId().equals(id));
//topics.removeIf((Topic t) -> t.getId().equals(id));
topicRepo.delete(id);
}
}
服务类
@Repository
public interface TopicRepository extends CrudRepository<Topic, String>{
//List<Course> findByTopic_Id(String topicid);
}
仓储类
@Entity
public class Topic {
@Id
@Column(name="TOPIC_ID")
private String id;
@Column(name="NAME")
private String name;
@Column(name="DESCRIPTION")
private String description;
@OneToMany(mappedBy="topic", fetch = FetchType.EAGER)
@JsonManagedReference
private List<Course> course = new ArrayList<Course>();
//no - argument constructor. Needed for hibernate
public Topic(){};
public Topic(String id, String name, String description, List<Course> course){
super();
this.id = id;
this.name = name;
this.description = description;
this.course = course;
}
public Topic(String id, String name, String description){
super();
this.id = id;
this.name = name;
this.description = description;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public List<Course> getCourse() {
return course;
}
public void setCourse(List<Course> course) {
this.course = course;
}
}
主题类
@Entity
public class Course{
@Id
@Column(name="COURSE_ID")
private String id;
private String name;
private String description;
//There could be many courses related to 1 topic
@ManyToOne
@JoinColumn(name = "TOPIC_ID")
@JsonBackReference
private Topic topic;
public Course(){};
public Course(String id, String name, String description){
super();
this.id = id;
this.name = name;
this.description = description;
}
public Topic getTopic() {
return topic;
}
public void setTopic(Topic topic) {
this.topic = topic;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
课程班
我试图用邮差发布一个包含很多课程到我的SQL数据库中的主题类。
在邮差,我没有使用JSON这样
{
"id": "700",
"name": "How to countt",
"description": "Counting numbersssss",
"course": [
{
"id": "1",
"name": "php",
"description": "gooddddyyyy stuff"
},
{
"id": "2",
"name": "phpp",
"description": "gooddddyyyy stuffp"
}
]
}
然而,POST,当我做了相应的得到所有的话题,我的反应是
{
"id": "700",
"name": "How to countt",
"description": "Counting numbersssss",
"course": []
}
它不是拿起课程我发布的。一个主题可以有很多课程。我该如何解决?谢谢
这是否意味着我必须像Topic.setcourse(课程)那样将课程对象传入主题? – Desmond
编号A主题没有一门课,它有很多。这个课程集合由杰克逊填充。相反是不正确的。课程没有提及他们的主题。所以你需要设置每门课程的主题:'course.setTopic(topic)'。 –