Using JSP pages with Piranha Nano

Below is a quick recipe to get Piranha Nano serving JSP pages.

JSP page

<%@page contentType="text/html" pageEncoding="UTF-8" session="false"%>
Hello JSP

Java code

NanoPiranha piranha = new NanoPiranhaBuilder()
    .directoryResource("src/test/jsp")
    .servlet("JSP Servlet", new JspServlet())
    .servletInitParam("JSP Servlet", "classpath", System.getProperty("java.class.path"))
    .servletInitParam("JSP Servlet", "compilerSourceVM", "1.8")
    .servletInitParam("JSP Servlet", "compilerTargetVM", "1.8")
    .build();

NanoRequest request = new NanoRequestBuilder()
    .method("GET")
    .servletPath("/index.jsp")
    .build();

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
NanoResponse response = new NanoResponseBuilder()
    .outputStream(outputStream)
    .build();

piranha.service(request, response);

Note in this example src/test/jsp is the directory on your fileystem where you put the index.jsp page

Maven coordinates

Please use the following dependencies for the example

<dependency>
    <groupId>cloud.piranha</groupId>
    <artifactId>piranha-nano</artifactId>
    <version>y.m.p</version>
<dependency>
<dependency>
    <groupId>org.glassfish.web</groupId>
    <artifactId>jakarta.servlet.jsp</artifactId>
    <version>2.3.5</version>
</dependency>

where y is the year, m is the month and p is the patch version of the release you want to use.

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