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java - 部署基于 Jersey 的 Restful 服务项目中的 HTTPstatus 500

转载 作者:行者123 更新时间:2023-11-30 09:21:10 25 4
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我最近在 this 之后开始使用 Jersey教程。我已经在 web.xml 中正确配置了服务/包名称,现在我得到了一个 javax.servlet.ServletException: Servlet.init() Exception 以及下面的堆栈跟踪:

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>

这是我的应用程序设置:

Apache Tomcat 6.0
Jersey-core-1.8.jar
Jersey-bundle-1.8.jar
asm-3.1.jar
JRE7
Windows 64 位

-> 我无法弄清楚是什么导致了这个 com.sun.jersey.spi.inject.Errors$ErrorMessagesException,欢迎回答与类似问题相关的问题。

最佳答案

不确定是不是你的问题,一切正常,但是下面的映射出现了两次:

  @GET
@Produces(MediaType.TEXT_PLAIN)

你的 sayXMLHello() 应该用 @Produces(MediaType.TEXT_XML) 来注释

关于java - 部署基于 Jersey 的 Restful 服务项目中的 HTTPstatus 500,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17102393/

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