我正在尝试使用SpringBoot和hibernate向Postgres DB插入一个值（http://localhost:8080/create?name=name1&email=name1@email.com但是在日志中它表示插入但是没有插入记录也没有例外。请帮助我找到问题
Postgres版本：
"PostgreSQL 9.6.3 on x86_64-pc-mingw64, compiled by gcc.exe (Rev5, Built by MSYS2 project) 4.9.2, 64-bit"
的build.gradle：
apply plugin: 'java'
apply plugin: 'maven'
apply plugin: 'eclipse'
group = 'netgloo'
version = '0.0.1-SNAPSHOT'
description = """spring-boot-mysql-springdatajpa-hibernate"""
sourceCompatibility = 1.8
targetCompatibility = 1.8
tasks.withType(JavaCompile) {
options.encoding = 'UTF-8'
}
repositories {
maven { url "http://repo.maven.apache.org/maven2" }
}
dependencies {
compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version:'1.5.2.RELEASE'
compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version:'1.5.2.RELEASE'
compile group: 'postgres', name: 'postgres', version:'42.1.1.jre6'
}
User.java：
@Entity
@Table(name = "users")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@NotNull
private String email;
@NotNull
private String name;
public User() { }
public User(long id) {
this.id = id;
}
public User(String email, String name) {
this.email = email;
this.name = name;
}
public long getId() {
return id;
}
public void setId(long value) {
this.id = value;
}
public String getEmail() {
return email;
}
public void setEmail(String value) {
this.email = value;
}
public String getName() {
return name;
}
public void setName(String value) {
this.name = value;
}
}
控制器：
@Controller
public class UserController {
@RequestMapping("/create")
@ResponseBody
public String create(String email, String name) {
User user = null;
try {
user = new User(email, name);
userDao.save(user);
}
catch (Exception ex) {
return "Error creating the user: " + ex.toString();
}
return "User succesfully created! (id = " + user.getId() + ")";
}
@RequestMapping("/get-by-email")
@ResponseBody
public String getByEmail(String email) {
String userId;
try {
User user = userDao.findByEmail(email);
userId = String.valueOf(user.getId());
}
catch (Exception ex) {
return "User not found";
}
return "The user id is: " + userId;
}
}
userDAO的：
@Transactional
public interface UserDao extends CrudRepository<User, Long> {
public User findByEmail(String email);
} // class UserDao
日志：
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
[32m :: Spring Boot :: [39m [2m (v1.5.2.RELEASE)[0;39m
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[2m2017-07-07 14:54:59.533[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mnetgloo.Application [0;39m [2m:[0;39m No active profile set, falling back to default profiles: default
[2m2017-07-07 14:54:59.652[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mationConfigEmbeddedWebApplicationContext[0;39m [2m:[0;39m Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4387b79e: startup date [Fri Jul 07 14:54:59 IST 2017]; root of context hierarchy
[2m2017-07-07 14:55:01.391[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mtrationDelegate$BeanPostProcessorChecker[0;39m [2m:[0;39m Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$61eecdd6] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
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[2m2017-07-07 14:55:02.171[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ost-startStop-1][0;39m [36mo.s.web.context.ContextLoader [0;39m [2m:[0;39m Root WebApplicationContext: initialization completed in 2525 ms
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[2m2017-07-07 14:55:02.472[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ost-startStop-1][0;39m [36mo.s.b.w.servlet.FilterRegistrationBean [0;39m [2m:[0;39m Mapping filter: 'characterEncodingFilter' to: [/*]
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[2m2017-07-07 14:55:04.067[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mj.LocalContainerEntityManagerFactoryBean[0;39m [2m:[0;39m Building JPA container EntityManagerFactory for persistence unit 'default'
[2m2017-07-07 14:55:04.103[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.jpa.internal.util.LogHelper [0;39m [2m:[0;39m HHH000204: Processing PersistenceUnitInfo [
name: default
...]
[2m2017-07-07 14:55:04.304[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.Version [0;39m [2m:[0;39m HHH000412: Hibernate Core {5.0.12.Final}
[2m2017-07-07 14:55:04.306[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.cfg.Environment [0;39m [2m:[0;39m HHH000206: hibernate.properties not found
[2m2017-07-07 14:55:04.309[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.cfg.Environment [0;39m [2m:[0;39m HHH000021: Bytecode provider name : javassist
[2m2017-07-07 14:55:04.388[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.hibernate.annotations.common.Version [0;39m [2m:[0;39m HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
[2m2017-07-07 14:55:04.602[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.dialect.Dialect [0;39m [2m:[0;39m HHH000400: Using dialect: org.hibernate.dialect.PostgreSQLDialect
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[2m2017-07-07 14:55:04.923[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.type.BasicTypeRegistry [0;39m [2m:[0;39m HHH000270: Type registration [java.util.UUID] overrides previous : org.hibernate.type.UUIDBinaryType@2f84acf7
[2m2017-07-07 14:55:05.243[0;39m [33m WARN[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.orm.deprecation [0;39m [2m:[0;39m HHH90000014: Found use of deprecated [org.hibernate.id.SequenceGenerator] sequence-based id generator; use org.hibernate.id.enhanced.SequenceStyleGenerator instead. See Hibernate Domain Model Mapping Guide for details.
[2m2017-07-07 14:55:05.724[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36morg.hibernate.tool.hbm2ddl.SchemaUpdate [0;39m [2m:[0;39m HHH000228: Running hbm2ddl schema update
[2m2017-07-07 14:55:05.877[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mj.LocalContainerEntityManagerFactoryBean[0;39m [2m:[0;39m Initialized JPA EntityManagerFactory for persistence unit 'default'
[2m2017-07-07 14:55:06.920[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerAdapter[0;39m [2m:[0;39m Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4387b79e: startup date [Fri Jul 07 14:54:59 IST 2017]; root of context hierarchy
[2m2017-07-07 14:55:07.038[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerMapping[0;39m [2m:[0;39m Mapped "{[/]}" onto public java.lang.String netgloo.controllers.MainController.index()
[2m2017-07-07 14:55:07.040[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerMapping[0;39m [2m:[0;39m Mapped "{[/delete]}" onto public java.lang.String netgloo.controllers.UserController.delete(long)
[2m2017-07-07 14:55:07.040[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerMapping[0;39m [2m:[0;39m Mapped "{[/create]}" onto public java.lang.String netgloo.controllers.UserController.create(java.lang.String,java.lang.String) throws java.lang.Exception
[2m2017-07-07 14:55:07.041[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerMapping[0;39m [2m:[0;39m Mapped "{[/update]}" onto public java.lang.String netgloo.controllers.UserController.updateUser(long,java.lang.String,java.lang.String)
[2m2017-07-07 14:55:07.041[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerMapping[0;39m [2m:[0;39m Mapped "{[/get-by-email]}" onto public java.lang.String netgloo.controllers.UserController.getByEmail(java.lang.String) throws java.lang.Exception
[2m2017-07-07 14:55:07.044[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerMapping[0;39m [2m:[0;39m Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
[2m2017-07-07 14:55:07.045[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.w.s.m.m.a.RequestMappingHandlerMapping[0;39m [2m:[0;39m Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
[2m2017-07-07 14:55:07.113[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.w.s.handler.SimpleUrlHandlerMapping [0;39m [2m:[0;39m Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
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[2m2017-07-07 14:55:07.172[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.w.s.handler.SimpleUrlHandlerMapping [0;39m [2m:[0;39m Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
[2m2017-07-07 14:55:07.557[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.j.e.a.AnnotationMBeanExporter [0;39m [2m:[0;39m Registering beans for JMX exposure on startup
[2m2017-07-07 14:55:08.132[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36ms.b.c.e.t.TomcatEmbeddedServletContainer[0;39m [2m:[0;39m Tomcat started on port(s): 8080 (http)
[2m2017-07-07 14:55:08.138[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[ main][0;39m [36mnetgloo.Application [0;39m [2m:[0;39m Started Application in 9.279 seconds (JVM running for 11.078)
[2m2017-07-07 14:55:22.454[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[nio-8080-exec-1][0;39m [36mo.a.c.c.C.[Tomcat].[localhost].[/] [0;39m [2m:[0;39m Initializing Spring FrameworkServlet 'dispatcherServlet'
[2m2017-07-07 14:55:22.454[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[nio-8080-exec-1][0;39m [36mo.s.web.servlet.DispatcherServlet [0;39m [2m:[0;39m FrameworkServlet 'dispatcherServlet': initialization started
[2m2017-07-07 14:55:22.692[0;39m [32m INFO[0;39m [35m17176[0;39m [2m---[0;39m [2m[nio-8080-exec-1][0;39m [36mo.s.web.servlet.DispatcherServlet [0;39m [2m:[0;39m FrameworkServlet 'dispatcherServlet': initialization completed in 237 ms
Hibernate: select nextval ('hibernate_sequence')
Hibernate: insert into users (email, name, id) values (?, ?, ?)
答案 0 :(得分：0)
在Postgre表中使用serial或bigserial字段时，它是一个自动生成序列的自动增量字段。
使用hibernate_sequence时，这可能会导致hibernate使用的序列（GenerationType.AUTO）出现问题。
为避免这种情况，您可以依赖串行字段的id生成器：
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
或者你可能会找到bigserial生成的序列（1）（在本例中我们称之为user_id_seq），并在注释中指定它，以便hibernate直接使用这个：
@Id
@SequenceGenerator(name = "seqUser", sequenceName = "user_id_seq", allocationSize = 1)
@GeneratedValue(generator = "seqUser", strategy = GenerationType.AUTO)
（1）：在表脚本中，您可能有类似下面的内容，告诉您Postgre用于增量的序列名称（通常类似于：表名 _ < em>列名 _seq）。
id bigint NOT NULL DEFAULT nextval('user_id_seq'::regclass)
有关串行字段的更多信息，请参阅此问题：PostgreSQL bigserial & nextval
使用Postgre解答有关GenerationType策略的一些信息：JPA and PostgreSQL with GenerationType.IDENTITY