getResourceAsStream () path problem

tags: getResourceAsStream() Javaweb path

Take the example tomcat comes to do the project examples:

        // "/" with respect to E: \ app \ apache-tomcat-8.5.31 \ webapps \ examples
        session.getServletContext().getResourceAsStream("/");

                 // relative to the E: \ app \ apache-tomcat-8.5.31 \ webapps \ examples \ WEB-INF \ classes
        this.getClass().getResourceAsStream("/");

                 // same:. This.getClass () getResourceAsStream ( "/") ;, but do not write "/"
        this.getClass().getClassLoader().getResourceAsStream("");

From the tested code can be seen

1. session.getServletContext().getResourceAsStream("/"); Equivalent to the current project directory compiled, "/" represents the root directory of the current project;

2. this.getClass().getResourceAsStream("/");Equivalent WEB-INF \ classes, "/" on behalf of classes directory (compiled src directory) under the current project;

3. this.getClass().getClassLoader().getResourceAsStream("");And this.getClass () getResourceAsStream ( "/");.. The same directory beginning, the difference is not to write "/", in fact getClass () getResourceAsStream ( "/") is called a source ingetClassLoader()Method, write without any increase in forward slashes.

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