是否可以在 Tomcat 库中执行嵌入式 Java servlet 代码(如使用库 Jetty)? [英] Is it possible to do an embedded Java servlet code (like using libraries Jetty) in Tomcat libraries?
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问题描述
假设我在 Jetty 库中有一个嵌入式 Java servlet 的以下示例 - 是否可以使用 Tomcat API 库进行等效操作?
Suppose I have the following example of an embedded Java servlet in Jetty libraries - is it possible to do an equivalent using the Tomcat API libraries?
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;
public class HelloHandler extends AbstractHandler
{
public void handle(String target,Request baseRequest,HttpServletRequest request,HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html;charset=utf-8");
response.setStatus(HttpServletResponse.SC_OK);
baseRequest.setHandled(true);
response.getWriter().println("<h1>Hello World</h1>");
}
public static void main(String[] args) throws Exception
{
Server server = new Server(8080);
server.setHandler(new HelloHandler());
server.start();
server.join();
}
}
推荐答案
Tomcat7 嵌入式等效项如下所示:
A Tomcat7 embedded equivalent would look like this:
public class TinyTomcat7Embedded {
public static void main(String[] args) {
Tomcat tomcat = new Tomcat();
tomcat.setPort(8080);
File baseDir = new File("tomcat");
tomcat.setBaseDir(baseDir.getAbsolutePath());
File applicationDir = new File(baseDir + "/webapps", "/ROOT");
if (!applicationDir.exists()) {
applicationDir.mkdirs();
}
try {
Context appContext = tomcat.addWebapp("/", "ROOT");
// A Jetty AbstractHandler is an HttpServlet here:
Tomcat.addServlet(appContext, "helloWorldServlet", new HttpServlet() {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
response.setStatus(HttpServletResponse.SC_OK);
response.getWriter().println("<h1>Hello World</h1>");
}
});
appContext.addServletMapping("/helloworld", "helloWorldServlet");
tomcat.start();
System.out.println("Tomcat server: http://" + tomcat.getHost().getName() + ":" + 8080 + "/");
tomcat.getServer().await();
} catch (ServletException e) {
e.printStackTrace();
} catch (LifecycleException e) {
e.printStackTrace();
}
}
}
将这些依赖项添加到您的 pom.xml:
Add these dependencies to your pom.xml:
<!-- Eclipse Java Compiler -->
<dependency>
<groupId>org.eclipse.jdt.core.compiler</groupId>
<artifactId>ecj</artifactId>
<version>3.7.1</version>
</dependency>
<!-- Tomcat Embedded -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>7.0.26</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-logging-juli</artifactId>
<version>7.0.26</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-logging-log4j</artifactId>
<version>7.0.26</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<version>7.0.26</version>
</dependency>
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