案子
我正在尝试使用 REST 服务将用户数据提取到 Servlet 过滤器。
POM.xml
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
代码
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
Client client = ClientBuilder.newClient(new ClientConfig());
String entity = client.target("http://localhost:8080/insame/webresources/com.insame.entity.users")
.path("count")
.request(MediaType.TEXT_PLAIN)
.get(String.class);
System.out.println("entity-------->" +entity);
休息:
@GET
@Path("count")
@Produces("text/plain")
public String countREST() {
return String.valueOf(super.count());
}
问题
javax.ws.rs.ProcessingException: java.net.SocketException: Unexpected end of file from server
at org.glassfish.jersey.client.HttpUrlConnector.apply(HttpUrlConnector.java:202)
at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:215)
at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:650)
WARNING: StandardWrapperValve[com.insame.service.ApplicationConfig]: Servlet.service() for servlet com.insame.service.ApplicationConfig threw exception
javax.ws.rs.InternalServerErrorException: HTTP 500 Internal Server Error
at org.glassfish.jersey.client.JerseyInvocation.convertToException(JerseyInvocation.java:904)
at org.glassfish.jersey.client.JerseyInvocation.translate(JerseyInvocation.java:749)
at org.glassfish.jersey.client.JerseyInvocation.access$500(JerseyInvocation.java:88)
at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:650)
问题
0)我的代码有什么问题?
1) 使用 REST + JPA 从 servlet 过滤器获取数据的最明智方法是什么?
2)如果有另一种方法可以做到这一点,我的意思是,请告诉我?
3)泽西客户端是唯一的方法吗
4)如何在没有 Jersey 客户端的情况下直接从过滤器获取 EntityManager 并调用其余服务?
泽西岛文档和示例:http: //jersey.java.net/documentation/latest/user-guide.html#d0e2481
谢谢,萨米