ClassCastException：为什么不能将我的CrossOriginResourceSharingFilter强制转换为我的GlassFish Server中的javax.servlet.Filter

问题描述 投票：-1回答：1

我尝试启用CorsFilter以允许从AngularClient进行访问。我已经在Google上搜索了操作方法，但找不到任何适合我的方法。

当我启动服务器时，它抛出一个异常，表明我的CorsFilter无法转换为servlet.Filter。

我的CrossOriginResourceSharingFilter类：


import java.util.logging.Filter;
import java.util.logging.LogRecord;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.ext.Provider;

/**
 *
 * @author Struckl
 */
@Provider
public class NewCrossOriginResourceSharingFilter implements ContainerResponseFilter, Filter {

    @Override
    public void filter(ContainerRequestContext requestContext, ContainerResponseContext response) {
        response.getHeaders().putSingle("Access-Control-Allow-Origin", "*");
        response.getHeaders().putSingle("Access-Control-Allow-Methods", "OPTIONS, GET, POST, PUT, DELETE");
        response.getHeaders().putSingle("Access-Control-Allow-Headers", "Content-Type");
    }

    @Override
    public boolean isLoggable(LogRecord record) {
        throw new UnsupportedOperationException("Hast schon gedacht das des implementiert is.");
    }

}

我的web.xml：

<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="3.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">   

    <filter>
        <filter-name>CORSFilter</filter-name>
        <filter-class>Misc.NewCrossOriginResourceSharingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>CORSFilter</filter-name>
        <url-pattern>/SypServer/*</url-pattern>
    </filter-mapping>

    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

我的堆栈跟踪：

    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:135)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:5329)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:5943)
    at com.sun.enterprise.web.WebModule.start(WebModule.java:691)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1041)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:1024)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:747)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2286)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1932)
    at com.sun.enterprise.web.WebApplication.start(WebApplication.java:139)
    at org.glassfish.internal.data.EngineRef.start(EngineRef.java:122)
    at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:291)
    at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:352)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:500)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219)
    at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:539)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:535)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:360)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:534)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:565)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:557)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:360)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:556)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1464)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1300(CommandRunnerImpl.java:109)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722)
    at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:534)
    at com.sun.enterprise.v3.admin.AdminAdapter.onMissingResource(AdminAdapter.java:224)
    at org.glassfish.grizzly.http.server.StaticHttpHandlerBase.service(StaticHttpHandlerBase.java:189)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassCastException: Misc.NewCrossOriginResourceSharingFilter cannot be cast to javax.servlet.Filter
    at com.sun.enterprise.web.WebContainer.createFilterInstance(WebContainer.java:1007)
    at com.sun.enterprise.web.WebModule.createFilterInstance(WebModule.java:2143)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:264)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:131)
    ... 51 more

也许我错过了一些非常重要的事情，或者我忽略了一个简单的错误，但是我不知道为什么它不会运行。

java server cors glassfish web.xml
1个回答
0
投票

您正在实现java.util.logging.Filter而不是javax.servlet.Filter。自动导入FTW。 ;）

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