【发布时间】：2021-02-12 15:03:45
【问题描述】：
我正在使用 Spring Boot 2.4.2 和 JPA 在现有数据库中生成表。 Maven构建项目没有任何问题，当我启动spring boot时，也没有错误，但同时没有创建表。
这是我的 pom.xml：
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
application.properties：
spring.datasource.url=jdbc:postgresql://localhost:5433/tiktaktoe
spring.datasource.username=postgres
spring.datasource.password=****
spring.jpa.generate-ddl=true
我的课程：
package by.egerag.tiktaktoe.entity;
import javax.persistence.*;
import java.util.List;
@Entity
public class Player {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String username;
private String password;
@ManyToMany(cascade = { CascadeType.ALL })
@JoinTable(
name = "role",
joinColumns = { @JoinColumn(name = "player_id") },
inverseJoinColumns = { @JoinColumn(name = "role_id") }
)
private List<Role> role;
@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "statistics_id", referencedColumnName = "id")
private Statistics statistics;
@OneToMany(mappedBy = "firstPlayer", cascade = CascadeType.ALL)
private List<Lobby> firstLobby;
@OneToMany(mappedBy = "secondPlayer", cascade = CascadeType.ALL)
private List<Lobby> secondLobby;
public Player() {
}
public Player(Integer id, String username, String password, List<Role> role, Statistics statistics) {
this.id = id;
this.username = username;
this.password = password;
this.role = role;
this.statistics = statistics;
}
public Player(String username, String password, List<Role> role, Statistics statistics) {
this.username = username;
this.password = password;
this.role = role;
this.statistics = statistics;
}
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 List<Role> getRole() {
return role;
}
public void setRole(List<Role> rights) {
this.role = rights;
}
public Statistics getStatistics() {
return statistics;
}
public void setStatistics(Statistics statistics) {
this.statistics = statistics;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
", rights=" + role +
", statistics=" + statistics +
'}';
}
}
package by.egerag.tiktaktoe.entity;
import javax.persistence.*;
import java.util.List;
@Entity
public class Role {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String role;
@ManyToMany(mappedBy = "role")
private List<Player> players;
public Role() {
}
public Role(String role) {
this.role = role;
}
public Role(Integer id, String role) {
this.id = id;
this.role = role;
}
public Role(Integer id, String role, List<Player> players) {
this.id = id;
this.role = role;
this.players = players;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public List<Player> getPlayers() {
return players;
}
public void setPlayers(List<Player> players) {
this.players = players;
}
@Override
public String toString() {
return "Role{" +
"id=" + id +
", role='" + role + '\'' +
", users=" + players +
'}';
}
}
package by.egerag.tiktaktoe.entity;
import javax.persistence.*;
@Entity
public class Statistics {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private Integer win;
private Integer loose;
@OneToOne(mappedBy = "statistics")
private Player player;
public Statistics() {
}
public Statistics(Integer win, Integer loose) {
this.win = win;
this.loose = loose;
}
public Statistics(Integer id, Integer win, Integer loose) {
this.id = id;
this.win = win;
this.loose = loose;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getWin() {
return win;
}
public void setWin(Integer win) {
this.win = win;
}
public Integer getLoose() {
return loose;
}
public void setLoose(Integer loose) {
this.loose = loose;
}
@Override
public String toString() {
return "Statistics{" +
"id=" + id +
", win=" + win +
", loose=" + loose +
'}';
}
}
package by.egerag.tiktaktoe.entity;
import javax.persistence.*;
@Entity
public class Lobby {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@ManyToOne
@JoinColumn(name = "firstPlayer_id", referencedColumnName = "id")
private Player firstPlayer;
@ManyToOne
@JoinColumn(name = "secondPlayer_id", referencedColumnName = "id")
private Player secondPlayer;
private Integer turn;
@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "battlefield_id", referencedColumnName = "id")
private Battlefield battlefield;
public Lobby() {
}
public Lobby(Player firstPlayer, Player secondPlayer, Integer turn, Battlefield battlefield) {
this.firstPlayer = firstPlayer;
this.secondPlayer = secondPlayer;
this.turn = turn;
this.battlefield = battlefield;
}
public Lobby(Integer id, Player firstPlayer, Player secondPlayer, Integer turn, Battlefield battlefield) {
this.id = id;
this.firstPlayer = firstPlayer;
this.secondPlayer = secondPlayer;
this.turn = turn;
this.battlefield = battlefield;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Player getFirstPlayer() {
return firstPlayer;
}
public void setFirstPlayer(Player firstPlayer) {
this.firstPlayer = firstPlayer;
}
public Player getSecondPlayer() {
return secondPlayer;
}
public void setSecondPlayer(Player secondPlayer) {
this.secondPlayer = secondPlayer;
}
public Integer getTurn() {
return turn;
}
public void setTurn(Integer turn) {
this.turn = turn;
}
public Battlefield getBattlefield() {
return battlefield;
}
public void setBattlefield(Battlefield battlefield) {
this.battlefield = battlefield;
}
@Override
public String toString() {
return "Lobby{" +
"id=" + id +
", firstPlayer=" + firstPlayer +
", secondPlayer=" + secondPlayer +
", turn=" + turn +
", battlefield=" + battlefield +
'}';
}
}
package by.egerag.tiktaktoe.entity;
import javax.persistence.*;
@Entity
public class Battlefield {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private Integer x1y1;
private Integer x2y1;
private Integer x3y1;
private Integer x1y2;
private Integer x2y2;
private Integer x3y2;
private Integer x1y3;
private Integer x2y3;
private Integer x3y3;
@OneToOne(mappedBy = "battlefield")
private Lobby lobby;
public Battlefield() {
}
public Battlefield(Integer x1y1, Integer x2y1, Integer x3y1,
Integer x1y2, Integer x2y2, Integer x3y2,
Integer x1y3, Integer x2y3, Integer x3y3) {
this.x1y1 = x1y1;
this.x2y1 = x2y1;
this.x3y1 = x3y1;
this.x1y2 = x1y2;
this.x2y2 = x2y2;
this.x3y2 = x3y2;
this.x1y3 = x1y3;
this.x2y3 = x2y3;
this.x3y3 = x3y3;
}
public Battlefield(Integer id,
Integer x1y1, Integer x2y1, Integer x3y1,
Integer x1y2, Integer x2y2, Integer x3y2,
Integer x1y3, Integer x2y3, Integer x3y3) {
this.id = id;
this.x1y1 = x1y1;
this.x2y1 = x2y1;
this.x3y1 = x3y1;
this.x1y2 = x1y2;
this.x2y2 = x2y2;
this.x3y2 = x3y2;
this.x1y3 = x1y3;
this.x2y3 = x2y3;
this.x3y3 = x3y3;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getX1y1() {
return x1y1;
}
public void setX1y1(Integer x1y1) {
this.x1y1 = x1y1;
}
public Integer getX2y1() {
return x2y1;
}
public void setX2y1(Integer x2y1) {
this.x2y1 = x2y1;
}
public Integer getX3y1() {
return x3y1;
}
public void setX3y1(Integer x3y1) {
this.x3y1 = x3y1;
}
public Integer getX1y2() {
return x1y2;
}
public void setX1y2(Integer x1y2) {
this.x1y2 = x1y2;
}
public Integer getX2y2() {
return x2y2;
}
public void setX2y2(Integer x2y2) {
this.x2y2 = x2y2;
}
public Integer getX3y2() {
return x3y2;
}
public void setX3y2(Integer x3y2) {
this.x3y2 = x3y2;
}
public Integer getX1y3() {
return x1y3;
}
public void setX1y3(Integer x1y3) {
this.x1y3 = x1y3;
}
public Integer getX2y3() {
return x2y3;
}
public void setX2y3(Integer x2y3) {
this.x2y3 = x2y3;
}
public Integer getX3y3() {
return x3y3;
}
public void setX3y3(Integer x3y3) {
this.x3y3 = x3y3;
}
public Lobby getLobby() {
return lobby;
}
public void setLobby(Lobby lobby) {
this.lobby = lobby;
}
@Override
public String toString() {
return "Battlefield{" +
"id=" + id +
", x1y1=" + x1y1 +
", x2y1=" + x2y1 +
", x3y1=" + x3y1 +
", x1y2=" + x1y2 +
", x2y2=" + x2y2 +
", x3y2=" + x3y2 +
", x1y3=" + x1y3 +
", x2y3=" + x2y3 +
", x3y3=" + x3y3 +
'}';
}
}
和 Spring Boot 日志：
2021-02-12 17:25:55.225 INFO 8148 --- [ main] b.egerag.tiktaktoe.TikTakToeApplication : Starting TikTakToeApplication using Java 11.0.5 on DESKTOP-1RSAF53 with PID 8148 (D:\demo\TikTakToe\target\classes started by HP in D:\demo\TikTakToe)
2021-02-12 17:25:55.257 INFO 8148 --- [ main] b.egerag.tiktaktoe.TikTakToeApplication : No active profile set, falling back to default profiles: default
2021-02-12 17:25:57.319 INFO 8148 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-02-12 17:25:57.435 INFO 8148 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 108 ms. Found 5 JPA repository interfaces.
2021-02-12 17:25:58.949 INFO 8148 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-02-12 17:25:58.969 INFO 8148 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-02-12 17:25:58.969 INFO 8148 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.41]
2021-02-12 17:25:59.282 INFO 8148 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-02-12 17:25:59.282 INFO 8148 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3732 ms
2021-02-12 17:25:59.537 INFO 8148 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-02-12 17:25:59.784 INFO 8148 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-02-12 17:25:59.864 INFO 8148 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-02-12 17:25:59.975 INFO 8148 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.27.Final
2021-02-12 17:26:00.288 INFO 8148 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-02-12 17:26:00.581 INFO 8148 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL10Dialect
2021-02-12 17:26:02.180 INFO 8148 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-02-12 17:26:02.195 INFO 8148 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-02-12 17:26:02.264 WARN 8148 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-02-12 17:26:02.449 INFO 8148 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-02-12 17:26:03.345 INFO 8148 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-02-12 17:26:03.361 INFO 8148 --- [ main] b.egerag.tiktaktoe.TikTakToeApplication : Started TikTakToeApplication in 9.544 seconds (JVM running for 13.661)
我检查了几乎所有类似的问题，但没有找到适合我的案例的解决方案。
【问题讨论】：
标签： spring-boot jpa