我有關於在Java Spring中獲取某些特定列的問題。
我正在使用Java Spring Boot和GraphDB作爲我的數據庫,並使用Model和Repository訪問數據庫(例如:我有userRepository,並使用userRepository.FindAll,並且所有記錄都在其所有字段中加載)。
舉例來說,我有一個列/字段的表:如何使用Neo4j從存儲庫獲取特定列
@NodeEntity
public class User {
@GraphId
Long id;
@NotNull
@Indexed(unique=true)
private String username;
@NotNull
private String password;
@NotNull
private String firstName;
@NotNull
private String lastName;
@NotNull
private String role;
@NotNull
private Boolean active;
public User() {
}
public User(String username, String password, String firstName,
String lastName, String role, Boolean active) {
super();
this.username = username;
this.password = password;
this.firstName = firstName;
this.lastName = lastName;
this.role = role;
this.active = active;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public Boolean getActive() {
return active;
}
public void setActive(Boolean active) {
this.active = active;
}
}
隨着存儲庫這樣的:
public interface UserRepository extends GraphRepository<User> {
}
我沒有把UserRepository.FindAll,因爲它已經實現了它GraphRepository
我不需要加載「密碼」字段。我應該如何在不加載「密碼」字段的情況下加載記錄?
你說我需要用@QueryResult創建類。據我所知,1類= 1文件類。如果我需要很多這樣的查詢,我是否必須創建許多文件? – 2015-02-24 03:59:00
我可以通過ID嗎? @Query(「MATCH(u:USER)RETURN u.id as id,u.username as username,u.role as role」) 我無法獲取ID – 2015-02-24 07:27:22
我已經編輯了我的答案和其他信息。 – 2015-02-24 08:30:26