我正在使用spring mvc + hibernate + spring data jpa。
我和PersonRole之间有很多关系。我想使用spring data jpa save方法添加一个新人。当我尝试保存时，我收到以下错误：
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/hub] threw exception [Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: Could not execute JDBC batch update; SQL [insert into roles (RLE_ROLE, RLE_ID) values (?, ?)]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update] with root cause
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '1' for key 'PRIMARY'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1039)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3597)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3529)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1990)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2151)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2625)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2119)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2415)
at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1976)
at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1449)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)
at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:114)
at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:109)
at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:244)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2411)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2874)
at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:79)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:265)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:184)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:76)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:521)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodIntercceptor.invoke(CrudMethodMetadataPostProcessor.java:122)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy59.save(Unknown Source)
at com.motodoc.hub.service.SecurityUserServiceImpl.addNewUser(SecurityUserServiceImpl.java:64)
at com.motodoc.hub.controller.UserController.save(UserController.java:150)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
似乎save方法正在尝试添加一个新的SecurityRole，因为SecurityRole已经存在且具有相同的主键，因此出现错误。
所以我的问题是如何保存一个新人，当给出一个已经存在于数据库中的SecurityRole时，它只更新Person和忽略SecurityRole的映射表？
非常感谢您的帮助。
以下所有相关代码......
人物实体类：
@Entity
@Table(name="persons")
public class Person implements UserDetails {
@Id
@Column(name="PRS_ID")
private int id;
@NotEmpty
@Column(name="PRS_USERNAME")
private String username;
@NotEmpty
@Column(name="PRS_PASSWORD")
private String password;
@NotEmpty
@Column(name="PRS_FIRST_NAME")
private String firstName;
@Column(name="PRS_MIDDLE_NAME")
private String middleName;
@NotEmpty
@Column(name="PRS_LAST_NAME")
private String lastName;
@OneToMany(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER)
@JoinTable(name = "USER_ROLES", joinColumns = {
@JoinColumn(name = "USR_PRS_ID") }, inverseJoinColumns = {
@JoinColumn(name = "RLE_ID") })
private Set<SecurityRole> roles;
@Transient
private final String PERMISSION_PREFIX = "ROLE_PERM_";
@Override
public Collection<? extends GrantedAuthority> getAuthorities() {
Set<GrantedAuthorityImpl> authorities = new HashSet<GrantedAuthorityImpl>();
for (SecurityRole role : roles) {
for (SecurityPermission permission : role.getPermissions()) {
GrantedAuthorityImpl authority = new GrantedAuthorityImpl(PERMISSION_PREFIX + permission.getPermission());
authorities.add(authority);
}
}
return authorities;
}
SecurityRole类：
@Entity
@Table(name="roles")
public class SecurityRole implements Serializable {
@Id
@Column(name="RLE_ID")
private int id;
@NotEmpty
@Column(name="RLE_ROLE")
private String role;
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "ROLE_PERMISSIONS", joinColumns = {
@JoinColumn(name = "RLE_ID") }, inverseJoinColumns = {
@JoinColumn(name = "PRM_ID") })
private Set<SecurityPermission> permissions;
}
服务类
public class SecurityUserServiceImpl implements ISecurityUserService {
@Autowired
private IPersonDao personDao;
@Autowired
private IRoleDao roleDao;
@Autowired
private BCryptPasswordEncoder encoder;
@Override
public void addNewUser(AddUserForm addUserForm) {
Person newPerson = addUserForm.getPerson();
//encode password
String encodedPassword = encoder.encode(newPerson.getPassword());
//set the encoded password as the password
newPerson.setPassword(encodedPassword);
Set<SecurityRole> securityRoles = new HashSet<SecurityRole>();
//get Role
securityRoles.add(roleDao.findById(addUserForm.getRoleId()));
newPerson.setRoles(securityRoles);
//now save
personDao.save(newPerson);
}
}
IPersonDao界面：
public interface IPersonDao extends JpaRepository<Person, Long>, QueryDslPredicateExecutor<Person> {
@SuppressWarnings("unchecked")
public Person save(Person person);
}
IRoleDao界面：
public interface IRoleDao extends JpaRepository<SecurityRole, Long>, QueryDslPredicateExecutor<SecurityRole> {
public List<SecurityRole> findAll();
public SecurityRole findById(int id);
}
Persistence.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
<persistence-unit name="hibernatePersistenceUnit" transaction-type="RESOURCE_LOCAL">
<properties>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
</properties>
<!-- <mapping-file>META-INF/orm.xml</mapping-file> -->
</persistence-unit>
</persistence>
答案 0 :(得分：0)
当我遇到类似的异常时，我的问题是我没有打算用@ManyToMany注释来保留该成员，但是我使用了cascade = CascadeType.ALL，这意味着它会尝试坚持下去。另外，我没有针对该领域的ID制定策略。我从ManyToMany注释中删除了cascade属性，它解决了我的问题。