Question

我最近在this教程之后开始使用Jersey。我已经在web.xml中配置了服务/包名称，现在问题是我得到了一个javax.servlet.ServletException：Servlet.init（）异常，下面有以下堆栈跟踪：

exception

javax.servlet.ServletException: Servlet.init() for servlet Jersey REST Service threw exception
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Unknown Source)
root cause

com.sun.jersey.spi.inject.Errors$ErrorMessagesException
    com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
    com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)
    com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:771)
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:766)
    com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488)
    com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318)
    com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609)
    com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210)
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373)
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556)
    javax.servlet.GenericServlet.init(GenericServlet.java:212)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Unknown Source)

这是我的Jes.java类文件：

package webb;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/Jes")
public class Jes {

      @GET
      @Produces(MediaType.TEXT_PLAIN)
      public String sayPlainTextHello() {
            return "Hello Jersey";
          }

      @GET
      @Produces(MediaType.TEXT_PLAIN)
      public String sayXMLHello() {
            return "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>";
          }

          // This method is called if HTML is request
          @GET
          @Produces(MediaType.TEXT_HTML)
          public String sayHtmlHello() {
            return "<html> " + "<title>" + "Hello Jersey" + "</title>"
                + "<body><h1>" + "Hello Jersey" + "</body></h1>" + "</html> ";
          }

    public static void main(String[] args) {
    }

}

和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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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>webb</display-name>
  <servlet>
    <servlet-name>Jersey REST Service</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <init-param>
      <param-name>com.sun.jersey.config.property.packages</param-name>
      <param-value>webb</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Jersey REST Service</servlet-name>
    <url-pattern>/rest/*</url-pattern>
  </servlet-mapping>
</web-app>

以下是我的应用程序设置：

Apache Tomcat 6.0
新泽西州的核心1.8.jar
新泽西束-1.8.jar
ASM-3.1.jar
JRE7
Windows 64位

- ＆gt; 我无法弄清楚是什么导致了这个com.sun.jersey.spi.inject.Errors $ ErrorMessagesException，欢迎与类似问题相关的答案。

Answer 1

不确定这是你的问题，一切似乎都没问题，但以下映射出现了两次：

  @GET
  @Produces(MediaType.TEXT_PLAIN)

sayXMLHello()应使用@Produces(MediaType.TEXT_XML)注释

HTTPstatus 500用于部署基于Jersey的Restful服务项目

1 个答案: