web.xml中的servlet-class路径

我正在关注http://www.vogella.com/tutorials/REST/article.html教程。web.xml中的servlet-class路径

我已经创建了名为“JerseyDemoProject”的项目（Dyanamic Web项目），通过名称“Package1”创建了一个包，并且我在该包中编写了程序Hello.java（在教程中给出）。

我已经修改了我的web.xml如下

<?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_3_0.xsd" id="WebApp_ID" version="3.0"> 
    <display-name>JerseyDemoProject</display-name> 
    <welcome-file-list> 
    <welcome-file>index.html</welcome-file> 
    <welcome-file>index.htm</welcome-file> 
    <welcome-file>index.jsp</welcome-file> 
    <welcome-file>default.html</welcome-file> 
    <welcome-file>default.htm</welcome-file> 
    <welcome-file>default.jsp</welcome-file> 
    </welcome-file-list> 

    <servlet> 
    <servlet-name>HelloServlet</servlet-name> 
    <servlet-class>Package1.Hello</servlet-class> 
    <init-param> 
     <param-name>jersey.config.server.provider.packages</param-name> 
     <param-value>Package1</param-value> 
    </init-param> 
    <load-on-startup>1</load-on-startup> 
    </servlet> 
    <servlet-mapping> 
    <servlet-name>HelloServlet</servlet-name> 
    <url-pattern>/rest/*</url-pattern> 
    </servlet-mapping> 


</web-app>

当我尝试“在服务器上运行”，它给了我404-未找到错误。我使用Tomcat服务器

Hello类：

package Package1; 


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

// Plain old Java Object it does not extend as class or implements 
// an interface 

// The class registers its methods for the HTTP GET request using the @GET annotation. 
// Using the @Produces annotation, it defines that it can deliver several MIME types, 
// text, XML and HTML. 

// The browser requests per default the HTML MIME type. 

//Sets the path to base URL + /hello 
@Path("/hello") 
public class Hello { 

    // This method is called if TEXT_PLAIN is request 
    @GET 
    @Produces(MediaType.TEXT_PLAIN) 
    public String sayPlainTextHello() { 
    return "Hello Jersey"; 
    } 

    // This method is called if XML is request 
    @GET 
    @Produces(MediaType.TEXT_XML) 
    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> "; 
    } 

}

Here is my project structure

UPDATE：

XML文件：

<?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_3_0.xsd" id="WebApp_ID" version="3.0"> 
    <display-name>JerseyDemoProject</display-name> 
    <welcome-file-list> 
    <welcome-file>index.html</welcome-file> 
    <welcome-file>index.htm</welcome-file> 
    <welcome-file>index.jsp</welcome-file> 
    <welcome-file>default.html</welcome-file> 
    <welcome-file>default.htm</welcome-file> 
    <welcome-file>default.jsp</welcome-file> 
    </welcome-file-list> 

    <servlet> 
    <servlet-name>HelloServlet</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>Package1</param-value> 
     </init-param> 

</servlet> 
    <servlet-mapping> 
    <servlet-name>HelloServlet</servlet-name> 
    <url-pattern>/rest/*</url-pattern> 
    </servlet-mapping> 


</web-app>

类文件

@Path("/hello") 
public class Hello { 

    // This method is called if TEXT_PLAIN is request 
    @GET 
    @Produces(MediaType.TEXT_PLAIN) 
    public String sayPlainTextHello() { 
    return "Hello Jersey"; 
    } 

    // This method is called if XML is request 
    @GET 
    @Produces(MediaType.TEXT_XML) 
    public String sayXMLHello() { 
    return "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>"; 
    } 

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

}

URL中使用

http://localhost:8080/JerseyDemoProject/rest/hello/inhtmlform

显示错误

HTTP Status 500 - Error instantiating servlet class com.sun.jersey.spi.container.servlet.ServletContainer

堆栈跟踪：

Exception: 
javax.servlet.ServletException: Error instantiating servlet class com.sun.jersey.spi.container.servlet.ServletContainer 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) 
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Unknown Source) 

Rootcause: 

java.lang.ClassNotFoundException: com.sun.jersey.spi.container.servlet.ServletContainer 
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720) 
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) 
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    java.lang.Thread.run(Unknown Source)

我发现TESE警告我的控制台

INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files (x86)\Java\jre7\bin;C:\windows\Sun\Java\bin;C:\windows\system32;C:\windows;C:/Program Files (x86)/Java/jre7/bin/client;C:/Program Files (x86)/Java/jre7/bin;C:/Program Files (x86)/Java/jre7/lib/i386;C:\product\11.2.0\client_1\bin;C:\Informatica\961_989\961_Install\java\jre\bin\server;C:\Informatica\961_989\961_Install\tools\odbcdrv;C:\Informatica\961_989\961_Install\tools\jdbcdrv;C:\Informatica\961_989\961_Install\tools\datadirect;C:\app\vpalagum\product\11.2.0\client_2\bin;C:\app\vpalagum\product\11.2.0\client_1;C:\Program Files (x86)\RSA SecurID Token Common;C:\Program Files\Common Files\Microsoft Shared\Microsoft Online Services;C:\Program Files (x86)\Common Files\Microsoft Shared\Microsoft Online Services;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Box\Box Edit\;C:\Program Files (x86)\Java\jdk7_u15\bin;c:\Program Files (x86)\Microsoft SQL Server\90\Tools\binn\;C:\Program Files\Perforce;C:\Softwares\eclipse4.2;;. 

WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:JerseyDemoProject' did not find a matching property.

来源

2014-09-10 user3873909

什么网址你得到404？粘贴在服务器上运行时在浏览器上生成的URL – zerocool 2014-09-10 11:10:51

我正在eclipse中运行它。单击“Hello.java” - >在服务器上运行 – user3873909 2014-09-10 11:13:04

显示的URL为http：// localhost：8080/JerseyDemoProject/WEB- INF/classes/Package1/Hello.java – user3873909 2014-09-10 11:13:30

我认为问题是因为使用我使用球衣2.1。我删除它，从https://jersey.java.net/download.html安装泽西岛1.18 JARbundle。我在我的WEB-INF库文件夹中添加了这个jar，并且在这个文件夹中添加了asm.jar。（这个jar可以在Jersey1.18 zip包中从同一个站点下载）。然后跟@SparkOn的Answer.It工作！

来源

2014-09-11 07:38:18 user3873909

由于指定的URL模式是

<url-pattern>/rest/*</url-pattern>

而且你的servlet代码应该是这样的

<servlet> 
    <servlet-name>HelloServlet</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>Package1</param-value> 
     </init-param> 
</servlet>

，你可以在你的资源方法指定其他路径来调用它单独像

@Path("/hello") 
    public class Hello { 

    @GET 
    @Path("/intextform") 
    @Produces(MediaType.TEXT_PLAIN) 
    public String helloWorld(){ 
     return "Hello from Jersey!"; 

     } 
    }

然后右键单击该项目并在服务器上运行

试试这个网址

http://localhost:8080/JerseyDemoProject/rest/hello/intextform

来源

2014-09-10 11:21:41 SparkOn

你做了我在答案中指定的任何内容，并添加了映射路径 – SparkOn 2014-09-10 11:29:47

完全限定包名是什么意思？ – user3873909 2014-09-10 11:31:28

在服务器上运行它之后，在servlet的顶部指定的包的名称访问资源方法 – SparkOn 2014-09-10 11:33:20

首先请在web.xml <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-cl‌ass>更换<servlet-class>Package1.Hello</servlet-class>并重新运行该应用程序

请尝试以下URL它应该工作：

http://localhost:8080/JerseyDemoProject/Package1/rest/hello

前提是你已将您的控制器映射到@PATH("/hello")

来源

2014-09-10 11:30:40 zerocool

不，它的工作 – user3873909 2014-09-10 11:37:26

问题不在Jersey 2.1中，问题在于您的servlet类。您应该使用在你的web.xml以下servlet类（适用于所有州2.x应用程序）

<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>

代替：

<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>

那么一切都将正常工作。

最后，你的servlet应该是：

<servlet> 
    <servlet-name>HelloServlet</servlet-name> 
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>  
    <init-param> 
     <param-name>jersey.config.server.provider.packages</param-name> 
     <param-value>Package1</param-value> 
    </init-param> 
</servlet>

来源

2014-09-12 12:58:37

web.xml中的servlet-class路径

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