Question

我试图在嵌入模式下使用jetty。我在初始化时遇到以下错误：

java.lang.NoSuchMethodError: javax.servlet.ServletContext.getJspConfigDescriptor()Ljavax/servlet/descriptor/JspConfigDescriptor;
at org.apache.jasper.servlet.TldScanner.scanJspConfig(TldScanner.java:148)

搜索了所有与jetty 9.2.10.v20150310一起发布的罐子，但除了有问题的类之外，没有任何一个，javax.servlet.ServletContext，没有在任何地方定义。只有servlet-api-3.1.jar中的接口

我的启动代码：

 public static void main(String[] args) throws Exception
 {
    JettyWebAppTest thiss = new JettyWebAppTest();
    thiss.init();
 }


private void init() throws Exception {

    System.setProperty("java.io.tmpdir", "/tmp/bolek");
    System.setProperty("org.apache.jasper.compiler.disablejsr199", "false");
    Server server = new Server(8080);

    WebAppContext context = new WebAppContext();

    context.setResourceBase(<myresourcebase>);
    context.setDescriptor("/WEB-INF/web.xml");

    context.setContextPath("/");
    context.setParentLoaderPriority(false);
    context.setAttribute(
     "org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern",
       ".*/[^/]*servlet-api-[^/]*\\.jar$|.*/javax.servlet.jsp.jstl-.*\\.jar$|.*/.*taglibs.*\\.jar$");


    context.setAttribute("javax.servlet.context.tempdir", 
            System.getProperty("java.io.tmpdir"));

    context.setAttribute("org.eclipse.jetty.containerInitializers",
         this.jspInitializers());
    context.setAttribute(InstanceManager.class.getName(),
            new SimpleInstanceManager());
    context.addBean(new ServletContainerInitializersStarter(context),
          true);

    context.setClassLoader(this.getUrlClassLoader());

    context.addServlet(this.jspServletHolder(), "*.jsp");


    server.setHandler(context);

    server.start();
    server.join();      
 }


 private ServletHolder defaultServletHolder(URI baseUri)
{
    ServletHolder holderDefault = new ServletHolder("default",
          DefaultServlet.class);

    holderDefault.setInitParameter("resourceBase", 
        baseUri.toASCIIString());
    holderDefault.setInitParameter("dirAllowed", "true");
    return holderDefault;
}


 private List<ContainerInitializer> jspInitializers()
 {
    JettyJasperInitializer sci = new JettyJasperInitializer();
    ServletContainerInitializer scii;
    scii = (ServletContainerInitializer)sci;

    ContainerInitializer initializer = new ContainerInitializer(scii, null);
    List<ContainerInitializer> initializers = new ArrayList<ContainerInitializer>();
    initializers.add(initializer);
    return initializers;
 }


 private ClassLoader getUrlClassLoader()
 {
    ClassLoader jspClassLoader = new URLClassLoader(new URL[0], this.getClass().getClassLoader());
    return jspClassLoader;
 }




private ServletHolder jspServletHolder()
{
    ServletHolder holderJsp = new ServletHolder("jsp", JettyJspServlet.class);
    holderJsp.setInitOrder(0);
    holderJsp.setInitParameter("logVerbosityLevel", "DEBUG");
    holderJsp.setInitParameter("fork", "false");
    holderJsp.setInitParameter("xpoweredBy", "false");
    holderJsp.setInitParameter("compilerTargetVM", "1.7");
    holderJsp.setInitParameter("compilerSourceVM", "1.7");
    holderJsp.setInitParameter("keepgenerated", "true");
    return holderJsp;
}

的web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app 
xmlns="http://java.sun.com/xml/ns/javaee" 
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"
version="3.0">
 <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
</web-app>

Answer 1

您的类路径上有一些不兼容的旧版本的servlet API。尝试从层次结构中的每个类加载器打印出类路径。还要调查您的启动设置，以查看哪些jar放在运行时类路径上。

扬

Answer 2

在Java Build Path / Libraries / Groovy Library中，指定“否”以包含来自Groovy lib文件夹的所有jar。

进行此更改并“完成”。

Groovy Libraries Dialog Box

注意：如果再次调出此对话框，您仍会看到选中“是”。忽略这一点。

java.lang.NoSuchMethodError：使用嵌入式jetty和jsp的javax.servlet.ServletContext.getJspConfigDescriptor

2 个答案: