我运行此代码时出现500错误，但在我的生活中，我无法找出原因。如果有人也可以帮我弄清楚如何打印堆栈跟踪，那也是很棒的。这是我的代码（这是一个Maven项目）：
编辑：没有打印到服务器日志，但我相信这是因为嵌入了Jetty
package pojo;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.glassfish.jersey.servlet.ServletContainer;
public class Main {
public static void main(String[] args) throws Exception {
Server server = new Server(8112);
ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
context.setContextPath("/");
server.setHandler(context);
ServletHolder h = new ServletHolder(new ServletContainer());
h.setInitParameter("com.sun.jersey.config.property.resourceConfigClass", "com.sun.jersey.api.core.PackagesResourceConfig");
h.setInitParameter("com.sun.jersey.config.property.packages", "resources");
h.setInitOrder(1);
context.addServlet(h, "/*");
try
{
server.start();
server.join();
}
catch (Throwable t)
{
t.printStackTrace(System.err);
}
}
}
我正在尝试访问此资源：
package resources;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Request;
import javax.ws.rs.core.UriInfo;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.Timer;
import java.util.ArrayList;
import java.util.List;
import pojo.Party;
@Path("/parties")
public class AllPartiesResource {
@Context
UriInfo url;
@Context
Request request;
String name;
public static final Timer allTime = DBConnection.registry.timer(MetricRegistry.name("Timer","all-parties"));
@GET
@Produces({MediaType.APPLICATION_JSON,MediaType.APPLICATION_XML})
public List<Party> getAllParties() throws Exception
{
final Timer.Context context=allTime.time(); //start the timer
List<Party> list = new ArrayList<Party>();
DBConnection.readAllData();
list.addAll(DBConnection.getPartyCollection().values());
context.stop(); //stops timer
return list;
// ---> code for Jackson
// String string;
// DBConnection.readAllData();
// ObjectMapper jsonMapper = new ObjectMapper();
// string=jsonMapper.writeValueAsString(DBConnection.getPartyCollection());
// return string;
}
@GET
@Path("count")
@Produces(MediaType.TEXT_PLAIN)
public String getPartyCount() throws Exception
{
DBConnection.readAllData();
return String.valueOf(DBConnection.getPartyCollection().size());
}
@Path("{party}") //points to OnePartyResource.class
public OnePartyResource getParty(@PathParam("party")String party)
{
name = party;
return new OnePartyResource(url,request,party);
}
}
这是我的pom：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>PartyAPI</groupId>
<artifactId>PartyAPIMaven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>com.codahale.metrics</groupId>
<artifactId>metrics-core</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.17.1</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>9.0.4.v20130625</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlet</artifactId>
<version>9.0.4.v20130625</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlets</artifactId>
<version>9.0.4.v20130625</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.6.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jax-rs-ri</artifactId>
<version>2.0-m13</version>
</dependency>
<dependency>
<groupId>com.google.code.simple-spring-memcached</groupId>
<artifactId>spymemcached</artifactId>
<version>2.8.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>oss.sonatype.org</id>
<name>OSS Sonatype Staging</name>
<url>https://oss.sonatype.org/content/groups/staging</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.6</version>
<configuration>
<createDependencyReducedPom>true</createDependencyReducedPom>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<manifestEntries>
<Main-Class>com.resteasy.Star.Main</Main-Class>
</manifestEntries>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
</project>
当我进入localhost：8112 /派对时，我得到以下内容：
HTTP ERROR: 500
Problem accessing /parties. Reason:
Request failed.
Powered by Jetty://
答案 0 :(得分：2)
也想出这个错误。基本上在我的setInitParam（）方法中，我试图调用一个不存在的包。 com.sun.jersey ...包在我的pom中不存在。添加它（并删除glassfish）后它完美地工作。