我有一个早些时候写的Spring引导项目，今天我尝试重新运行它。我收到错误消息，告诉我无法通过用户名和密码获取JDBC连接是正确的。下面提供了完整的错误堆栈，
java.lang.IllegalStateException: Failed to execute CommandLineRunner
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:735) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:716) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:703) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:304) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
at com.ef.Parser.main(Parser.java:46) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.7.RELEASE.jar:1.5.7.RELEASE]
Caused by: org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Unable to acquire JDBC Connection
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431) ~[spring-orm-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) ~[spring-tx-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:447) ~[spring-tx-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:277) ~[spring-tx-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) ~[spring-aop-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at com.ef.service.LogEntityServiceImpl$$EnhancerBySpringCGLIB$$574ab47e.saveAllLogEntities(<generated>) ~[classes/:na]
at com.ef.Parser.run(Parser.java:105) [classes/:na]
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:732) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
... 9 common frames omitted
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Unable to acquire JDBC Connection
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:1700) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:48) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:189) ~[spring-orm-4.3.11.RELEASE.jar:4.3.11.RELEASE]
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380) ~[spring-orm-4.3.11.RELEASE.jar:4.3.11.RELEASE]
... 18 common frames omitted
Caused by: org.hibernate.exception.SQLGrammarException: Unable to acquire JDBC Connection
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:95) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:90) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:112) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:230) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:237) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:214) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:52) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1512) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:45) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
... 20 common frames omitted
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'logparser'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_151]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_151]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.Util.getInstance(Util.java:381) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:910) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3923) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1273) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) ~[mysql-connector-java-5.1.6.jar:na]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_151]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_151]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302) ~[mysql-connector-java-5.1.6.jar:na]
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282) ~[mysql-connector-java-5.1.6.jar:na]
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:310) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:203) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:735) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:667) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:482) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107) ~[tomcat-jdbc-8.5.20.jar:na]
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:131) ~[tomcat-jdbc-8.5.20.jar:na]
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:386) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:87) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
... 27 common frames omitted
该应用从提供的Parser文件开始
@EnableJpaRepositories("com.ef.repository")
@SpringBootApplication(scanBasePackages = {"com.ef"}, exclude = JpaRepositoriesAutoConfiguration.class)
public class Parser implements CommandLineRunner {
@Autowired
private IpAddressService ipAddressService;
@Autowired
private HttpInfoMessageService httpInfoMessageService;
@Autowired
private LogEntityService logEntityService;
// @Autowired
// private IpService ipService;
public Parser() {
}
public static void main(String[] args) throws Exception {
SpringApplication application = new SpringApplication(Parser.class);
application.run(args);
}
/*
* print all the IP addresses that is over the threshold
* with all the http messages
* */
public static void printIpsAboveThresholdWithHttpMessages(List<IpAddress> ipAddresses) {
System.out.println(" IP : COMMENT ");
ipAddresses.forEach(ipAddress -> {
ipAddress.getHttpInfoMessage2s().forEach(
httpInfoMessage -> {
System.out.println(ipAddress.getAddress() + " : " + httpInfoMessage.getStatus());
}
);
System.out.println();
});
}
@Override
public void run(String... args) throws Exception {
/*Options options = new Options();
Option start = new Option("startDate", "startDate", true, "Start date");
start.setRequired(true);
options.addOption(start);
Option duration = new Option("duration", "duration", true, "duration");
duration.setRequired(true);
options.addOption(duration);
Option threshold = new Option("threshold", "threshold", true, "threshold");
threshold.setRequired(true);
options.addOption(threshold);
CommandLineParser parser = new DefaultParser();
HelpFormatter formatter = new HelpFormatter();
CommandLine cmd;
try {
cmd = parser.parse(options, args);
} catch (ParseException e) {
System.out.println(e.getMessage());
formatter.printHelp("utility-name", options);
System.exit(1);
return;
}
String startDate = cmd.getOptionValue("startDate").trim().replace(".", " ");
String dur = String.valueOf(cmd.getOptionValue("duration")).trim();
int thers = (int) Integer.valueOf(cmd.getOptionValue("threshold").trim());*/
List<LogEntity> allRecords = FileManager.readFileByLines("Log.txt");
// save all the log entities to the MySQL database
logEntityService.saveAllLogEntities(allRecords);
List<IpAddress> ipAddresses = DataOrganizationHelper
.getIpAddressesFromAllRecordsWithDurationAndThresHold(allRecords, "2017-10-02 17:14:55",
"daily", 100);
// some experiment
// List<Ip> ips = DataOrganizationHelper.getIpFromAllRecordsWithDurationAndThresHold(allRecords, "2017-10-02 17:14:55",
// "daily", 100);
// System.out.println("The size is = " + ips.size());
// ipService.saveAllIps(ips);
printIpsAboveThresholdWithHttpMessages(ipAddresses);
// save the ip addresses and the http messages to the MySQL database
ipAddressService.saveAllIpAddressses(ipAddresses);
exit(0);
}
}
提供了application.properties文件，
spring.application.name=Wallethub Log Parser
# MySQL configuration
spring.datasource.url=jdbc:mysql://localhost/LogParser
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# database username and the password
spring.datasource.username=testuser
spring.datasource.password=testpassword
# for the console app
spring.main.web-environment=false
spring.main.banner-mode=off
# ===============================
# = JPA / HIBERNATE
# ===============================
# Show or not log for each sql query
spring.jpa.show-sql=false
# Hibernate ddl auto (create, create-drop, update): with "update" the database
# schema will be automatically updated accordingly to java entities found in
# the project
spring.jpa.hibernate.ddl-auto=create
我之前使用过Spring，但是有一段时间没有接触过它。我想念什么问题？如果有兴趣，完整代码为here。
答案 0 :(得分：4)
产生原因：com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException： 未知的数据库“ logparser”
显然，它找不到名称为logparser的数据库。您必须先手动手动创建数据库。 spring.jpa.hibernate.ddl-auto=create只会为您创建表。它不会创建数据库。