embedded tomcat，如何用嵌入式tomcat的新逻辑替换标准tomcat的现有web.xml

hlswsv35  于 2021-10-10  发布在  Java
关注(0)|答案(0)|浏览(187)

鉴于现有 web.xml :

<?xml version="1.0" encoding="UTF-8"?>
<display-name>/</display-name>

<listener><listener-class>m.Web.startup.Listener</listener-class></listener>
<listener><listener-class>m.Store.Listener</listener-class></listener>

<session-config>
    <session-timeout>30</session-timeout>
</session-config>                                          

<servlet-mapping>
    <servlet-name>mmm.com.dispatcher.servlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
<servlet>
    <servlet-name>mmm.com.dispatcher.servlet</servlet-name>
    <servlet-class>m.Web.startup.DispatcherServlet</servlet-class>

    <init-param>
        <param-name>contextClass</param-name>
        <param-value>org.springframework.web.context.support.XmlWebApplicationContext</param-value>
    </init-param>

    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:/Web/config/ConfigWeb.xml
            classpath:/Auth/config/ConfigAuth.xml
            classpath:/Assets/config/ConfigAssets.xml
            classpath:/Accounts/config/ConfigAccounts.xml
            classpath:/App/config/ConfigApp.xml
            classpath:/Accounts/config/ConfigAccounts.xml
            classpath:/Store/config/ConfigStore.xml
        </param-value>
    </init-param>

    <load-on-startup>1</load-on-startup>
</servlet>

我补充说：

<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-core</artifactId>
    <version>8.0.48</version>
</dependency>
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
    <version>8.0.48</version>
</dependency>
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-logging-juli</artifactId>
    <version>8.0.48</version>
</dependency>

并试图做到：

private static void c() throws LifecycleException {
    File tmpDir = new File(System.getProperty("java.io.tmpdir"));

    Tomcat tomcat = new Tomcat();
    tomcat.setBaseDir(tmpDir.getAbsolutePath());
    tomcat.setPort(8080);

    XmlWebApplicationContext context = new XmlWebApplicationContext();

    DispatcherServlet servlet = new DispatcherServlet(context);

    servlet.setContextConfigLocation("""
        classpath:/Web/config/ConfigWeb.xml
        classpath:/Auth/config/ConfigAuth.xml
        classpath:/Assets/config/ConfigAssets.xml
        classpath:/Accounts/config/ConfigAccounts.xml
        classpath:/App/config/ConfigApp.xml
        classpath:/Accounts/config/ConfigAccounts.xml
        classpath:/Store/config/ConfigStore.xml
    """);

    Tomcat.addServlet(tomcat.addContext(tomcat.getHost(), "/", tmpDir.getAbsolutePath()), "mmm.com.dispatcher.servlet", servlet);

    new m.Web.startup.Listener();
    new m.Store.Listener();

    tomcat.start();

    tomcat.getServer().await();
}

但它不起作用。
服务器启动，但有几件事情不起作用。 localhost:8080 结果显示一个错误页面。
还尝试：

public static void e() throws LifecycleException {
    Tomcat tomcat = new Tomcat() {
        @Override
        public Context addWebapp(String contextPath, String docBase) throws ServletException {
            Context context = null;
            try {
                context = new StandardContext();
                context.setName(contextPath);
                context.setPath(contextPath);
                context.setDocBase(docBase);
                context.setRealm(this.getHost().getRealm());
                ContextConfig contextConfig = new ContextConfig();
                context.addLifecycleListener(contextConfig);
                String pathToWebXml = docBase + "Store/web.xml";
                if (new File(pathToWebXml).exists()) {
                    contextConfig.setDefaultWebXml(pathToWebXml);
                } else {
                    contextConfig.setDefaultWebXml("org/apache/catalin/startup/NO_DEFAULT_XML");
                }
                host.addChild(context);
            } catch (Exception e) {
                log.error("Error deploying webapp", e);
            }
            return context;

        }
    };
    tomcat.setPort(8081);

    Service service = tomcat.getService();
    service.addConnector(sslConnector());

    try {
        URL resource = TomcatServer.class.getClassLoader().getResource(".");

        tomcat.addWebapp("", resource.getPath());
        //add others here...
    } catch (ServletException e) {
        log.error("Problem webapp. Could be fatal?");
    }

    tomcat.start();
    tomcat.getServer().await();

}

但这会导致以下错误：

WARNING: Failed to scan 

[file:/Users/j/.m2/repository/xalan/xalan/2.7.2/xercesImpl.jar] from classloader hierarchy
java.io.IOException: java.lang.reflect.InvocationTargetException
    at org.apache.tomcat.util.compat.Jre9Compat.jarFileNewInstance(Jre9Compat.java:185)
    at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
    at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
    at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:374)
    at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:309)
    at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:278)
    at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:229)
    at org.apache.catalina.startup.ContextConfig.processJarsForWebFragments(ContextConfig.java:1898)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1131)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:783)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:307)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:95)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5212)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
    at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.GeneratedConstructorAccessor6.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
    at org.apache.tomcat.util.compat.Jre9Compat.jarFileNewInstance(Jre9Compat.java:182)
    ... 21 more
Caused by: java.nio.file.NoSuchFileException: /Users/j/.m2/repository/xalan/xalan/2.7.2/xercesImpl.jar
    at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
    at java.base/sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
    at java.base/sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:148)
    at java.base/java.nio.file.Files.readAttributes(Files.java:1843)
    at java.base/java.util.zip.ZipFile$Source.get(ZipFile.java:1198)
    at java.base/java.util.zip.ZipFile$CleanableResource.<init>(ZipFile.java:701)
    at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:240)
    at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:171)
    at java.base/java.util.jar.JarFile.<init>(JarFile.java:347)
    ... 26 more

Jun 23, 2021 2:57:15 PM org.apache.tomcat.util.scan.StandardJarScanner processURLs
WARNING: Failed to scan [file:/Users/j/.m2/repository/xalan/xalan/2.7.2/xml-apis.jar] from classloader hierarchy
java.io.IOException: java.lang.reflect.InvocationTargetException
    at org.apache.tomcat.util.compat.Jre9Compat.jarFileNewInstance(Jre9Compat.java:185)
    at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
    at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
    at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:374)
    at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:309)
    at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:278)
    at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:229)
    at org.apache.catalina.startup.ContextConfig.processJarsForWebFragments(ContextConfig.java:1898)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1131)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:783)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:307)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:95)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5212)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
    at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.GeneratedConstructorAccessor6.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
    at org.apache.tomcat.util.compat.Jre9Compat.jarFileNewInstance(Jre9Compat.java:182)
    ... 21 more
Caused by: java.nio.file.NoSuchFileException: /Users/j/.m2/repository/xalan/xalan/2.7.2/xml-apis.jar
    at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
    at java.base/sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
    at java.base/sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:148)
    at java.base/java.nio.file.Files.readAttributes(Files.java:1843)
    at java.base/java.util.zip.ZipFile$Source.get(ZipFile.java:1198)
    at java.base/java.util.zip.ZipFile$CleanableResource.<init>(ZipFile.java:701)
    at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:240)
    at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:171)
    at java.base/java.util.jar.JarFile.<init>(JarFile.java:347)
    ... 26 more

请注意，目前我是从一个 static void main 从intellij内部。
方法 e() 这里依赖于解析现有的web.xml文件，但这不起作用，而且由于缺少类路径内容，它失败了。
第一种方法 c() 依赖于尝试复制配置，但我缺少尝试正确复制配置的方法。
例如，我无法在samemanner中添加侦听器，也无法配置该示例 session-config 参数
第一个没有类路径问题，也没有开始，但是我认为一些事情，比如侦听器没有正确设置，或者它们的事件没有被触发。
编辑1：
也许这是添加侦听器的方法，在 c() :

Context ctx = tomcat.addContext(tomcat.getHost(), "/", tmpDir.getAbsolutePath());
    ctx.addApplicationListener(m.Web.startup.Listener.class.getCanonicalName());
    ctx.addApplicationListener(m.Store.Listener.class.getCanonicalName());

但事情又开始了，但tomcat仍然出错。不确定类路径是否为：。。。原件 web.xml 模仿 c() 也被准确地应用。
编辑2：
现在，大多数东西都被收集起来了，但是WebSocket（在代码中注解）没有被收集，httpsessionlistener也没有被触发。
在里面 web.xml 您可以定义一个实现多个接口的侦听器，例如 ServletContextListener, HttpSessionListener 但对于嵌入式tomcat，这似乎不起作用。我现在也无法单独注册，但这应该是可能的。还是挺烦人的。
我只希望您可以将web.xml提供给fcuker，它可以像独立的那样进行自我配置。我不明白为什么这么难。

private static void c() throws LifecycleException, ServletException, URISyntaxException, DeploymentException, IOException {
    File tmpDir = new File(System.getProperty("java.io.tmpdir"));

    Tomcat tomcat = new Tomcat();
    tomcat.setBaseDir(tmpDir.getAbsolutePath());
    tomcat.setPort(8080);

    Context ctx = tomcat.addContext("", new File(".").getAbsolutePath());
    ctx.addApplicationListener(m.Web.startup.Listener.class.getCanonicalName());
    ctx.addApplicationListener(m.Store.Listener.class.getCanonicalName());
    ctx.addApplicationListener(Listener.class.getCanonicalName());
    ctx.setSessionTimeout(30);

    Wrapper wrapper = Tomcat.addServlet(ctx, "mmm.com.dispatcher.servlet", m.Web.startup.DispatcherServlet.class.getCanonicalName());

    wrapper.addInitParameter("contextClass", org.springframework.web.context.support.XmlWebApplicationContext.class.getCanonicalName());
    wrapper.addInitParameter("contextConfigLocation", """
        classpath:/Web/config/ConfigWeb.xml
        classpath:/Auth/config/ConfigAuth.xml
        classpath:/Assets/config/ConfigAssets.xml
        classpath:/Accounts/config/ConfigAccounts.xml
        classpath:/App/config/ConfigApp.xml
        classpath:/Accounts/config/ConfigAccounts.xml
        classpath:/Store/config/ConfigStore.xml
    """);

    wrapper.setLoadOnStartup(1);

    if ( true ) {
        wrapper.addMapping("/");
    }
    else if ( false ) {
        ctx.addServletMappingDecoded("/", "mmm.com.dispatcher.servlet", true);
    }

    tomcat.start();

    if ( false ) {
        ContainerProvider.getWebSocketContainer().connectToServer(Socket.class, new URI("ws://"));
    }

    tomcat.getServer().await();
}
Javatomcatembedded-tomcatembedded-tomcat-7

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