Json-Mapping-Fehler: javax.servlet.ServletException. Spring Rahmen

Question

Ich brauche eine Pause api machen. Ich habe eine solche Struktur bekam:

Ich versuche Json-Mapping in mvs-Dispatcher-servlet.xml Datei, wo Entity Manager initialisiert wurde zu machen:

<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:tx="http://www.springframework.org/schema/tx" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd 
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> 

<context:component-scan base-package="server.repository, server.controller"/> 

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <property name="prefix" value="/WEB-INF/"/> 
    <property name="suffix" value=".jsp"/> 
</bean> 

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> 
    <property name="messageConverters"> 
     <list> 
      <ref bean="jsonConverter" /> 
     </list> 
    </property> 
</bean> 

<bean id="jsonConverter" 
     class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> 
    <property name="supportedMediaTypes" value="application/json" /> 
</bean> 

<jpa:repositories base-package="server.repository"/> 

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"> 
    <property name="persistenceUnitName" value="myprovider"/> 
</bean> 

<tx:annotation-driven transaction-manager="transactionManager"/> 

<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager"> 
    <property name="transactionManagerName" value="java:jboss/TransactionManager"/> 
</bean> 




</beans> 

Controller:

@RestController 
@RequestMapping("/remind") 
public class RemindController { 

@Autowired 
private RemindRepository remindRepository; 

@RequestMapping(value = "/get", method = RequestMethod.GET, headers="Accept=application/json") 
@ResponseBody 
public List<Remind> getReminder() { 
    return remindRepository.findAll(); 
} 
} 

web.xml:

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> 

<display-name>Spring MVC Application</display-name> 


<welcome-file-list> 
    <welcome-file>index.html</welcome-file> 
</welcome-file-list> 

<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> 

<context-param> 
    <param-name>contextConfigLocation</param-name> 
    <param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value> 
</context-param> 



</web-app> 

Aber ich habe:

javax.servlet.ServletException: No adapter for handler [server.controller.RemindController@7b64c]: The DispatcherServlet configuration needs to include a HandlerAdapter that supports this handler 
org.springframework.web.servlet.DispatcherServlet.getHandlerAdapter(DispatcherServlet.java:1163) 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939) 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:734) 
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:847) 

Controller (ohne json) hat gut funktioniert. Was mache ich falsch?

Answer 1

Recht Code:

<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:tx="http://www.springframework.org/schema/tx" 
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd 
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> 


<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> 
    <property name="messageConverters"> 
     <list> 
      <ref bean="jsonConverter" /> 
     </list> 
    </property> 
</bean> 

<bean id="jsonConverter" 
     class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> 
    <property name="supportedMediaTypes" value="application/json" /> 
</bean> 

<context:annotation-config /> 
<mvc:annotation-driven /> 

<context:component-scan base-package="server.repository, server.controller"/> 

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <property name="prefix" value="/WEB-INF/"/> 
    <property name="suffix" value=".jsp"/> 
</bean> 

<jpa:repositories base-package="server.repository"/> 

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"> 
    <property name="persistenceUnitName" value="myprovider"/> 
</bean> 

<tx:annotation-driven transaction-manager="transactionManager"/> 

<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager"> 
    <property name="transactionManagerName" value="java:jboss/TransactionManager"/> 
</bean>