java - 空上下文字符串警告

Question

我尝试配置 jetty 上下文(以编程方式)以使用服务于根上下文的 servlet。

我为上下文路径设置了“/”，为 servlet 映射设置了“/*”。这完全按照我想要的方式工作，但 Jetty 提示(警告)以“/”结尾的上下文路径。当我将上下文路径设置为“”(空字符串)时，它会导致出现关于空字符串的警告。

documentation section of Jetty关于这个问题的状态:

Be aware
Java Servlet Specification 2.5 discourages an empty context path string, and Java Servlet Specification 3.0 effectively forbids it.

Jetty源码部分为:

public void setContextPath(String contextPath)
    {
    if (contextPath == null)
        throw new IllegalArgumentException("null contextPath");

    if (contextPath.endsWith("/*"))
    {
        LOG.warn(this+" contextPath ends with /*");
        contextPath=contextPath.substring(0,contextPath.length()-2);
    }
    else if (contextPath.endsWith("/"))
    {
        LOG.warn(this+" contextPath ends with /");
        contextPath=contextPath.substring(0,contextPath.length()-1);
    }

    if (contextPath.length()==0)
    {
        LOG.warn("Empty contextPath");
        contextPath="/";
    }

    _contextPath = contextPath;

    if (getServer() != null && (getServer().isStarting() || getServer().isStarted()))
    {
        Handler[] contextCollections = getServer().getChildHandlersByClass(ContextHandlerCollection.class);
        for (int h = 0; contextCollections != null && h < contextCollections.length; h++)
            ((ContextHandlerCollection)contextCollections[h]).mapContexts();
    }
}

所以问题是，我应该设置什么上下文路径才能映射到上下文的根目录。目前一切正常，但根据规范或 Jetty 警告设置了禁止的上下文路径，我想我需要一些不同的东西。

Answer 1

文档是这么说的

The context path is the prefix of a URL path that is used to select the context(s) to which an incoming request is passed. Typically a URL in a Java servlet server is of the format http://hostname.com/contextPath/servletPath/pathInfo, where each of the path elements can be zero or more / separated elements. If there is no context path, the context is referred to as the root context. The root context must be configured as "/" but is reported as the empty string by the servlet API getContextPath() method.

所以，我想你可以使用 "/" 。

http://www.eclipse.org/jetty/documentation/current/configuring-contexts.html