Warum kann ich automatisch verdrahten oder pojo injizieren, aber ich kann nicht automatisch verdrahten oder RestTemplate injizieren?
Ich habe in diesem Forum viel über ähnliche Probleme gelesen, die beim Versuch auftreten, ein Pojo automatisch zu verdrahten. In der Regel bezieht sich die zu behebende Antwort auf component-scan oder@Component/@Controller. Aber in meinem Fall schaffe ich es, mein Pojo (Mas60010) automatisch zu verdrahten, aber ich kann @ nicht automatisch verdrahtRestTemplate oderObjectMapper und möglicherweise jedes andere Objekt aus einem Paket, das ich nicht codiert habe.
Um es einfach zu machen, ich erwähne nurRestTemplate. Was mache ich falsch? Ich denke, das Problem liegt entweder in den Bibliotheken oder in der Konfiguration. Hinweis: Bitte zeigen Sie diese Frage nicht als Duplikat an, indem Sie eine Frage anzeigen, die sich auf sein eigenes Pojo bezieht. Sie können sehen, dass es nicht meine Frage ist, weil ich in der Lage bin, dies zu verwalten. Das Problem liegt in Klassen in Gläsern, die in meinem Projekt enthalten sind.
package com.ma.mhe.log.handler;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.web.client.RestTemplate;
@Component
public class Lo_DisplayHandler extends Lo_Handler {
@Autowired private Mas60010 _mas60010; //this work perfectly
@Autowired private RestTemplate restTemplate; //this always cause nullPointException
mvc-dispatcher-servlet.xml
<context:annotation-config />
<mvc:annotation-driven />
<context:component-scan base-package="com.ma.mhe.log.handle, com.ma.mhe.log.domain" />
<context:property-placeholder location="classpath:restServices.properties"/>
<mvc:resources mapping="/**" location="/" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="jsonMessageConverter"/>
</list>
</property>
</bean>
<bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
</bean>
<!-- I was expecting this line to be enouth -->
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
</bean>
// Pojo - Ich kann es automatisch verdrahten
package com.ma.log.domain;
import org.springframework.stereotype.Service;
@Service
public class Mas60010 {
Alle Bibliotheken
"validation-api-1.0.0.GA.jar" "aopalliance-1.0.jar" "commons-logging-1.1.1.jar" "db2java.zip" "hibernate-validator-4.1.0.Final.jar" "Ruhezustand-Validator-Annotation-Prozessor-4.1.0.Final.jar" "jackson-annotations-2.2.3.jar" "jackson-core-2.2.3.jar" "jackson-databind-2.2.3.jar" "slf4j-api-1.7.5.jar" "spring-aop-4.1.2.RELEASE.jar" "spring-beans-4.1.2.RELEASE.jar" "spring-context-4.1.2.RELEASE.jar" "spring-context-support-4.1.2.RELEASE.jar" "spring-core-4.1.2.RELEASE.jar" "spring-expression-4.1.2.RELEASE.jar" "spring-web-4.1.2.RELEASE.jar" "spring-webmvc-4.1.2.RELEASE.jar" "upload.jar"// StackTrace
[12/17/14 10:38:54:243 CST] 00000033 SystemErr R at com.ma.mhe.log.handler.Lo_DisplayHandler.lastPage(Lo_DisplayHandler.java:181)
[12/17/14 10:38:54:246 CST] 00000033 SystemErr R at com.ma.mhe.log.Lo_Servlet.doDisDis(Lo_Servlet.java:164)
[12/17/14 10:38:54:248 CST] 00000033 SystemErr R at com.ma.mhe.log.Lo_Servlet.doProcess(Lo_Servlet.java:51)
[12/17/14 10:38:54:250 CST] 00000033 SystemErr R at com.ma.mhe.log.Lo_Servlet.doPost(Lo_Servlet.java:24)
[12/17/14 10:38:54:253 CST] 00000033 SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet.java:595)
[12/17/14 10:38:54:255 CST] 00000033 SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
[12/17/14 10:38:54:257 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1274)
[12/17/14 10:38:54:260 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:767)
[12/17/14 10:38:54:261 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:469)
[12/17/14 10:38:54:262 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1060)
[12/17/14 10:38:54:263 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:1377)
[12/17/14 10:38:54:265 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:185)
[12/17/14 10:38:54:266 CST] 00000033 SystemErr R at com.ma.mhe.Mhe_ControllerServlet.doProcess(Mhe_ControllerServlet.java:83)
[12/17/14 10:38:54:267 CST] 00000033 SystemErr R at com.ma.mhe.Mhe_ControllerServlet.doPost(Mhe_ControllerServlet.java:32)
[12/17/14 10:38:54:268 CST] 00000033 SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet.java:595)
[12/17/14 10:38:54:269 CST] 00000033 SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
[12/17/14 10:38:54:270 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1274)
[12/17/14 10:38:54:271 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:767)
[12/17/14 10:38:54:272 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:469)
[12/17/14 10:38:54:273 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1060)
[12/17/14 10:38:54:275 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:81)
[12/17/14 10:38:54:276 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:885)
[12/17/14 10:38:54:277 CST] 00000033 SystemErr R at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost$2.run(DynamicVirtualHost.java:266)
[12/17/14 10:38:54:277 CST] 00000033 SystemErr R at com.ibm.ws.http.dispatcher.internal.channel.HttpDispatcherLink$TaskWrapper.run(HttpDispatcherLink.java:776)
[12/17/14 10:38:54:278 CST] 00000033 SystemErr R at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
[12/17/14 10:38:54:279 CST] 00000033 SystemErr R at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
[12/17/14 10:38:54:280 CST] 00000033 SystemErr R at java.lang.Thread.run(Thread.java:662)
IBM WebSphere Liberty Profile-fähige Funktionen
<featureManager>
<feature>jsp-2.2</feature>
<feature>localConnector-1.0</feature>
<feature>jdbc-4.0</feature>
<feature>jaxrs-1.1</feature>
<feature>json-1.0</feature>
<feature>cdi-1.0</feature>
<feature>managedBeans-1.0</feature>
<feature>beanValidation-1.0</feature>
</featureManager>
// Klasse Lo_DisplayHandler
@Component
public class Lo_DisplayHandler extends Lo_Handler {
public Lo_DisplayHandler() {
super();
}
@Autowired
private Mas60010 _mas60010;
@Autowired private RestTemplate restTemplate;
public Lo_DisplayHandler(HttpServletRequest request,HttpServletResponse response) {
super();
this.request = request;
this.response = response;
}
public void lastPage() {
//RestTemplate restTemplate = new RestTemplate(); //if I uncomment this line and comment the @Autowired it will work
ObjectMapper mapper = new ObjectMapper();
try{
myPojoParameters...
//the next line rises nullPointExcepetion if I choose Autowired instead of new RestTemplate()
LogDisplay _l = restTemplate.postForObject(myServiceUrl,myPojoParameters, LogDisplay.class);
Lo_DisplayRecord lo_DisplayRecord = new Lo_DisplayRecord();
ArrayList<Lo_DisplayRecord> displayValues = new ArrayList<Lo_DisplayRecord>();
for(int i = 0; i < _l.getDisplayValues().size(); i++){
lo_DisplayRecord = mapper.convertValue(_l.getDisplayValues().get(i), Lo_DisplayRecord.class);
displayValues.add(lo_DisplayRecord);
}
Some not relevant operations...
}catch(Exception e){
e.printStackTrace();
// Lo_Servlet
package com.ma.mhe.log;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.ma.mhe.Mhe_Servlet;
import com.ma.mhe.PageFlow;
import com.ma.mhe.log.handler.*;
public class Lo_Servlet extends Mhe_Servlet {
private String _module = "lo public void init(){}
public void doPost(
javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
throws javax.servlet.ServletException, java.io.IOException {
doProcess(request,response);
}
public void doGet(
javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
throws javax.servlet.ServletException, java.io.IOException {
doProcess(request,response);
}
public void doProcess(
javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
throws javax.servlet.ServletException, java.io.IOException {
HttpSession session = request.getSession();
int val = setTask(session,request);
switch(val){
//FILTER PAGE
case 1:doFilRep(request,response);break;
case 2:doFilFil(request,response);break;
case 3:doFilDis(request,response);break;
case 4:doFilDef(request,response);break;
//DISPLAY PAGE
case 5:doDisRep(request,response);break;
case 6:doDisFil(request,response);break;
case 7:doDisDis(request,response);break;
private void doDisDis(HttpServletRequest request,HttpServletResponse response){
Lo_DisplayHandler display = null;
try{
display = new Lo_DisplayHandler(request,response);
display.lastPage();
}catch(Exception e){
}finally{
display = null;
}
}
// web.xml http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd "> MHE
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>myservice</servlet-name>
<servlet-class>org.springframework.ws.transport.http.MessageDispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
</init-param>
</servlet>
<servlet>
<description>
</description>
<display-name>Lo_Servlet</display-name>
<servlet-name>Lo_Servlet</servlet-name>
<servlet-class>com.ma.mhe.log.Lo_Servlet</servlet-class>
</servlet>
... others servlets configuration like this