我正在尝试使用 Tomcat 7、Apache Wink 和 Jackson JSON 处理器做一个简单的 REST Web 应用程序,但似乎碰壁了。如果我查看我的 web.xml 文件,我会看到:
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Example Web Application</display-name>
<servlet>
<servlet-name>ExampleServlet</servlet-name>
<servlet-class>org.apache.wink.server.internal.servlet.RestServlet</servlet-class>
<init-param>
<param-name>javax.ws.rs.Application</param-name>
<param-value>com.dummy.example.server.ExampleApplication</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>ExampleServlet</servlet-name>
<url-pattern>/services/*</url-pattern>
</servlet-mapping>
</web-app>
现在,如果我用 /* 代替 URL 模式,则 REST 调用可以工作,但是当我使用 /services/* 时,它会失败。
在我的 ExampleApplication 中,我看到:
package com.dummy.example.server;
import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.core.Application;
import org.codehaus.jackson.jaxrs.JacksonJaxbJsonProvider;
import org.codehaus.jackson.map.AnnotationIntrospector;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.introspect.JacksonAnnotationIntrospector;
import org.codehaus.jackson.xc.JaxbAnnotationIntrospector;
public class ExampleApplication extends Application {
/**
* Get the list of service classes provided by this JAX-RS application
*/
@Override
public Set<Class<?>> getClasses() {
Set<Class<?>> serviceClasses = new HashSet<Class<?>>();
serviceClasses.add(com.dummy.example.server.services.Employee.class);
return serviceClasses;
}
@SuppressWarnings("deprecation")
@Override
public Set<Object> getSingletons() {
Set<Object> s = new HashSet<Object>();
// Register the Jackson provider for JSON
// Make (de)serializer use a subset of JAXB and (afterwards) Jackson annotations
// See http://wiki.fasterxml.com/JacksonJAXBAnnotations for more information
ObjectMapper mapper = new ObjectMapper();
AnnotationIntrospector primary = new JaxbAnnotationIntrospector();
AnnotationIntrospector secondary = new JacksonAnnotationIntrospector();
AnnotationIntrospector pair = new AnnotationIntrospector.Pair(primary, secondary);
mapper.getDeserializationConfig().setAnnotationIntrospector(pair);
mapper.getSerializationConfig().setAnnotationIntrospector(pair);
// Set up the provider
JacksonJaxbJsonProvider jaxbProvider = new JacksonJaxbJsonProvider();
jaxbProvider.setMapper(mapper);
s.add(jaxbProvider);
return s;
}
}
在我的 Employee 类中,我有:
package com.dummy.example.server.services;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import org.json.simple.JSONObject;
@Path("/services/employee")
@Produces(MediaType.APPLICATION_JSON)
@SuppressWarnings("unchecked")
public class Employee {
@GET
public JSONObject get() {
JSONObject json = new JSONObject();
json.put("Name", "Example");
return json;
}
}
有任何想法吗?一段时间以来,我一直在反对这个