我正在开发springboot-springsession-jdbc-demo。当我只是运行代码时，我得到以下错误。它看起来我需要在application.properties中设置一些属性，以便事先创建模式/表。必需的配置已经放置，但仍然会出错。代码存在于https://github.com/sivaprasadreddy/spring-session-samples
参考错误：
org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [DELETE FROM SPRING_SESSION WHERE LAST_ACCESS_TIME < ?]; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'test.spring_session' doesn't exist
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:231) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:649) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:870) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:931) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:941) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.session.jdbc.JdbcOperationsSessionRepository$6.doInTransaction(JdbcOperationsSessionRepository.java:481) ~[spring-session-1.2.1.RELEASE.jar:na]
at org.springframework.session.jdbc.JdbcOperationsSessionRepository$6.doInTransaction(JdbcOperationsSessionRepository.java:478) ~[spring-session-1.2.1.RELEASE.jar:na]
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) ~[spring-tx-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.session.jdbc.JdbcOperationsSessionRepository.cleanUpExpiredSessions(JdbcOperationsSessionRepository.java:478) ~[spring-session-1.2.1.RELEASE.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_45]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_45]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_45]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_45]
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81) [spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_45]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_45]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_45]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_45]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_45]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_45]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'test.spring_session' doesn't exist
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_45]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_45]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_45]
at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[na:1.8.0_45]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:404) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.Util.getInstance(Util.java:387) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:942) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3966) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3902) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2526) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2673) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2549) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1861) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2073) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2009) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5098) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1994) ~[mysql-connector-java-5.1.39.jar:5.1.39]
at org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:877) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:870) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:633) ~[spring-jdbc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
... 21 common frames omitted
的pom.xml
<!-- Parent pom providing dependency and plugin management for applications
built with Maven -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.0.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- Spring Boot Starter Test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Spring Boot Starter JDBC -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- Spring Boot Starter Web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Spring Boot Starter Thymeleaf -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!-- Spring Session -->
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session</artifactId>
</dependency>
<!-- Spring Boot devtools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<!-- MYSQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- H2 DB -->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
</dependencies>
</project>
Application.java
@SpringBootApplication
@EnableJdbcHttpSession
@EnableAutoConfiguration
public class Application{
public static void main(String[] args){
SpringApplication.run(Application.class, args);
}
}
HomeController.java
@Controller
public class HomeController {
private static final AtomicInteger UserId = new AtomicInteger(0);
@RequestMapping("/")
public String home(Model model){
return "index";
}
@RequestMapping("/add-simple-attrs")
public String handleSimpleSessionAttributes(HttpServletRequest req, HttpServletResponse resp){
String attributeName = req.getParameter("attributeName");
String attributeValue = req.getParameter("attributeValue");
req.getSession().setAttribute(attributeName, attributeValue);
User user = new User();
user.setName(attributeValue);
req.getSession().setAttribute(attributeName, user);
return "redirect:/";
}
@RequestMapping("/add-object-attrs")
public String handleObjectSessionAttributes(HttpServletRequest req, HttpServletResponse resp){
String name = req.getParameter("name");
User user = new User();
user.setId(UserId.incrementAndGet());
user.setName(name);
req.getSession().setAttribute("USER_ID_"+user.getId(), user);
return "redirect:/";
}
}
User.java
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private Integer id;
private String name;
public User(){
}
public User(Integer id, String name){
this.id = id;
this.name = name;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + "]";
}
public Integer getId(){
return id;
}
public void setId(Integer id){
this.id = id;
}
public String getName(){
return name;
}
public void setName(String name){
this.name = name;
}
}
application.properties
logging.level.org.springframework=INFO
################### DataSource Configuration ##########################
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.initialize=true
#spring.datasource.data=classpath:org/springframework/session/jdbc/schema-h2.sql
spring.datasource.data=classpath:org/springframework/session/jdbc/schema-mysql.sql
spring.datasource.continue-on-error=true
spring.jpa.hibernate.ddl-auto=create
#spring.jpa.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
的index.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="utf-8"/>
<title>Home</title>
</head>
<body>
<h2 th:text="#{app.title}">App Title</h2>
<h4>Add Simple Attributes To Session</h4>
<form class="form-inline" role="form" action="add-simple-attrs" method="post">
<label for="attributeName">Attribute Name</label>
<input id="attributeName" type="text" name="attributeName"/>
<label for="attributeValue">Attribute Value</label>
<input id="attributeValue" type="text" name="attributeValue"/>
<input type="submit" value="Set Attribute"/>
</form>
<h4>Add Object Attributes To Session</h4>
<form class="form-inline" role="form" action="add-object-attrs" method="post">
<label for="name">User Name</label>
<input id="name" type="text" name="name"/>
<input type="submit" value="Save"/>
</form>
<h3>Session Attributes</h3>
<table>
<thead>
<tr>
<th>Attribute Name</th>
<th>Attribute Value</th>
</tr>
</thead>
<tbody>
<tr th:each="attr : ${session}">
<td th:text="${attr.key}">Name</td>
<td th:text="${attr.value}">Value</td>
</tr>
</tbody>
</table>
</body>
</html>
答案 0 :(得分：6)
当使用Spring-boot 2.0.5（与OP使用的1.4.0相对）和Postgres驱动程序时，我有一个非常相似的错误：
org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [DELETE FROM spring_sessions WHERE EXPIRY_TIME < ?]; nested exception is org.postgresql.u
til.PSQLException: ERROR: relation "spring_sessions" does not exist
Position: 13
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:234) ~[spring-jdbc-5.0.8.RELEASE.jar!/:5.0.8.RELEA
SE]
// redacted...
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]
Caused by: org.postgresql.util.PSQLException: ERROR: relation "spring_sessions" does not exist
Position: 13
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2433) ~[postgresql-42.2.2.jar!/:42.2.2]
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2178) ~[postgresql-42.2.2.jar!/:42.2.2]
// redacted...
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605) ~[spring-jdbc-5.0.8.RELEASE.jar!/:5.0.8.RELEASE]
... 16 common frames omitted
根据documentation，设置由关系数据库支持的Spring Session就像向您的application.properties添加单个配置属性一样简单：
spring.session.store-type=jdbc
请注意，为了自动创建会话表，我还必须指定：
spring.session.jdbc.initialize-schema=always
一旦指定了此设置，Spring就会使用spring-session-jdbc jar中正确的SQL初始化脚本。我的错误是没有指定该选项-在这种情况下，embedded被用作默认值。
答案 1 :(得分：1)
我不确定这是否是最好的解决方案（甚至是我刚接触弹簧的解决方案，也不知道这样做的后果），但是我遇到了同样的问题，设法删除了解决方案注释@EnableJdbcHttpSession
根据韦德兰·帕维奇（Vedran Pavic）：
spring.session。*对您不起作用的原因是因为您 使用@EnableJdbcHttpSession。这意味着您正在配置 Spring Session是明确的，因此Spring Boot会回退其 自动配置。
您应该删除@EnableJdbcHttpSession并确保Spring Boot是 自动配置Spring Session。此外，您也可以离开 spring.session.store-type出来，因为Spring Boot应该能够 推断您正在使用哪种会话存储库实现 因为您在上只有SessionRepository实现 classpath（即您仅依赖spring-session-jdbc而没有其他依赖 Spring Session模块）。
这将解决您眼前的问题，但是我不确定是否会破坏其他东西...
答案 2 :(得分：0)
我认为您有多个问题默认情况下，jdbc具有H2数据库。它是由spring自动创建的。 检查它是否在那里。因此，首先在H2上运行它。然后将相同的数据库和表复制到MySQL。创建与MySQL相同的架构和表，然后更改与MySQL的连接。
Spring Boot自动创建一个数据源，该数据源将Spring Session连接到H2数据库的嵌入式实例 src / main / resources / application.properties
spring.datasource.url= # JDBC URL of the database.
spring.datasource.username= # Login username of the database.
spring.datasource.password= # Login password of the database.
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root