У меня есть простой проект сервлета: мне нужно внедрить зависимость в экземпляр сервлета. Пробовал несколько аннотаций: Default, Singlton, EJB, ManagedBean, ничего не помогает.
Часть POM.xml
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<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>
Сервлет
@WebServlet(urlPatterns = {"/updater_servlet"},loadOnStartup = 1)
public class Updater_servlet extends HttpServlet
{
private final static org.slf4j.Logger logger = LoggerFactory.getLogger(Updater_servlet.class);
@Inject
private UpdatesModel updates;
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
...
}
Класс модели
@Model
public class UpdatesModel implements Serializable
{
private final static org.slf4j.Logger logger = LoggerFactory.getLogger(UpdatesModel.class);
private final String url;
private final String username;
private final String password;
private final String instpath;
public UpdatesModel()
{
Properties prop = new Properties();
try
{
Class.forName(driverName);
prop.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("config.properties"));
}
catch (ClassNotFoundException|IOException ex)
{
Logger.getLogger(UpdatesModel.class.getName()).log(Level.SEVERE, null, ex);
}
url = "jdbc:mysql://" + serverName + "/" + prop.getProperty("database","");
username = prop.getProperty("dbuser","");
password = prop.getProperty("dbpassword","");
instpath = prop.getProperty("instpath","");
}
Поле Updates никогда не инициализируется. Это равно нулю. Что я сделал не так?
ОБНОВЛЕНИЕ: зависимости:
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.7</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.7</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>1.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>1.10.8</version>
<scope>test</scope>
</dependency>
</dependencies>
Создал пустой beans.xml в WEB-INF - не помогает(( Разворачиваю на Tomcat 7. Также пробовал на tomcat 8 - без разницы((
@Model
, которая работала бы с сервлетами. - person Luiggi Mendoza   schedule 19.12.2014