我正在尝试在我的tomcat应用程序上使用并嵌入sqlite.db文件。我正在研究NetBeans并通过Netbean的播放按钮在本地服务器上部署它。到现在为止还挺好。但是，当我构建war文件并将其部署在Raspberry PI tomcat上时，我遇到了问题。我附上以下错误。
由于som原因，在本地工作的相同代码不能在Raspberry上安装的这个tomcat服务器上运行。有什么想法吗？
谢谢！
====代码====
ContextService.java
public class ContexService implements ServletContextListener {
/**
*
* @param sce
*/
@Override
public void contextInitialized(ServletContextEvent sce) {
System.out.println("== context initialized ==");
SqliteTest.getInstance().start();
SqliteTest.getInstance().stop();
}
/**
*
* @param sce
*/
@Override
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("== context destroyed ==");
SqliteTest.getInstance().stop();
}
}
SQLiteManager.java
public class SQLiteManager {
private static final Logger logger = LoggerFactory.getLogger(SQLiteManager.class);
private static SQLiteManager instance = null;
private static Connection connection = null;
private static int QUERY_TIMEOUT = 5;
private static String TABLE_PROPERTIES = "Properties";
private static String DB_NAME = "safemo.db";
private static class TABLE_PROPERTIES_COLUMNS {
public static final String TRIP_NUMBER = "tripNumber";
}
private SQLiteManager() {
openDB();
}
public static SQLiteManager getInstance() {
if (instance == null) {
instance = new SQLiteManager();
}
return instance;
}
private void openDB() {
if (connection == null) {
connect();
} else {
try {
if (connection.isClosed()) {
connect();
}
} catch (SQLException ex) {
logger.error("Error openning connection : " + ex.getMessage());
}
}
}
private void connect() {
try {
Class.forName("org.sqlite.JDBC");
connection = DriverManager.getConnection("jdbc:sqlite::resource:" + DB_NAME);
logger.debug("Opened database successfully");
} catch (ClassNotFoundException ex) {
logger.error(ex.getMessage());
} catch (SQLException ex) {
logger.error(ex.getMessage());
}
}
public void closeDB() {
try {
if (connection != null) {
connection.close();
}
logger.debug("Connection closed successfully");
} catch (SQLException ex) {
logger.error("Error closing database : " + ex.getMessage());
}
}
public void incrementTripNumber()
{
try {
Statement statement = connection.createStatement();
statement.setQueryTimeout(QUERY_TIMEOUT); // set timeout to 30 sec.
statement.executeUpdate("UPDATE " + TABLE_PROPERTIES + " SET " + TABLE_PROPERTIES_COLUMNS.TRIP_NUMBER + " = " + TABLE_PROPERTIES_COLUMNS.TRIP_NUMBER + " + 1");
} catch (SQLException ex) {
logger.error("Error getting trip number : " + ex.getMessage());
}
}
public int getTripNumber() {
int tripNumber = -1;
try {
Statement statement = connection.createStatement();
statement.setQueryTimeout(QUERY_TIMEOUT); // set timeout to 30 sec.
ResultSet rs = statement.executeQuery("SELECT " + TABLE_PROPERTIES_COLUMNS.TRIP_NUMBER + " FROM " + TABLE_PROPERTIES);
if (rs.next()) {
tripNumber = rs.getInt(TABLE_PROPERTIES_COLUMNS.TRIP_NUMBER);
}
rs.close();
} catch (SQLException ex) {
logger.error("Error getting trip number : " + ex.getMessage());
} finally {
return tripNumber;
}
}
}
SQLiteTest.java
public class SqliteTest
{
private static SqliteTest instance = null;
private static final Logger logger = LoggerFactory.getLogger(SqliteTest.class);
private SqliteTest()
{
}
public static SqliteTest getInstance()
{
if(instance == null)
{
instance = new SqliteTest();
}
return instance;
}
public void start()
{
SQLiteManager sqliteManager = SQLiteManager.getInstance();
logger.debug("TRIP NUMBER : " + sqliteManager.getTripNumber());
sqliteManager.incrementTripNumber();
logger.debug("TRIP NUMBER INCREASED: " + sqliteManager.getTripNumber());
}
public void stop()
{
SQLiteManager.getInstance().closeDB();
}
}
Pom文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.app</groupId>
<artifactId>SqliteTest</artifactId>
<version>1.0</version>
<packaging>war</packaging>
<name>SqliteTest</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.7</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.8.11.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>7.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Netbeans本地安装上的控制台输出
== context initialized ==
08:40:55.398 [http-nio-8080-exec-18] DEBUG SQLiteManager - Opened database successfully
08:40:55.406 [http-nio-8080-exec-18] DEBUG SqliteTest - TRIP NUMBER : 2
08:40:55.543 [http-nio-8080-exec-18] DEBUG SqliteTest - TRIP NUMBER INCREASED: 3
08:40:55.543 [http-nio-8080-exec-18] DEBUG SQLiteManager - Connection closed successfully
这是我在构建war文件并通过Tomcat管理器在Raspberry上部署时出现的错误。
== context initialized ==
Aug 25, 2016 6:05:33 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
Aug 25, 2016 6:05:33 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/SqliteTest-1.0] startup failed due to previous errors
== context destroyed ==
Aug 25, 2016 6:05:33 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc
WARNING: The web application [/SqliteTest-1.0] registered the JDBC driver [org.sqlite.JDBC] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Aug 25, 2016 6:05:33 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deployment of web application archive /var/lib/tomcat8/webapps/SqliteTest-1.0.war has finished in 42,719 ms
Raspberry上的java版本： openjdk版“1.8.0_40-internal” OpenJDK运行时环境（build 1.8.0_40-internal-b04） OpenJDK Zero VM（版本25.40-b08，解释模式）
Tomcat版本：Apache Tomcat / 8.0.14（Debian） Tomcat JVM 1.8.0_40-internal-b04