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| 登录到ServletContext |
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// web.xml
/*
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
<servlet>
<servlet-name>LoggingServlet</servlet-name>
<servlet-class>LoggingServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoggingServlet</servlet-name>
<url-pattern>/loggingServlet</url-pattern>
</servlet-mapping>
</web-app>
*/
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoggingServlet extends HttpServlet {
private ServletContext context;
public void init(ServletConfig config) throws ServletException {
super.init(config);
context = getServletContext();
context.log("Init has been invoked");
}
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws IOException {
ServletOutputStream out = res.getOutputStream();
context.log("doGet has now been invoked");
res.setContentType("text/html");
out.println("<html><head><title>Logging Servlet</title></head>");
out.println("<body>Visit the <tomcat-home>\\logs and open the xx file to see the log entries");
out.println("</body></html>");
}
}
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