logservlet.java

21天学通java的示例程序源代码

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

/**
 * This servlet demonstrates how to write to the servlet log.
 * Every method in this servlet writes to the servlet log.
 */
public class LogServlet extends HttpServlet {

  public void init() throws ServletException {
    getServletContext().log("LogServlet: in the init() method");
  } 
  public void doGet(HttpServletRequest request, 
                    HttpServletResponse response) throws ServletException, 
                    IOException {
    getServletContext().log("LogServlet: in the doGet() method");

    // create an exception and send it to the log
    Throwable throwable = new RuntimeException("An example exception");
    getServletContext().log("Here's what an exception looks like", 
                            throwable);
  } 
  public void doPost(HttpServletRequest request, 
                     HttpServletResponse response) throws ServletException, 
                     IOException {
    getServletContext().log("LogServlet: in the doPost() method");
  } 
  public void doPut(HttpServletRequest request, 
                    HttpServletResponse response) throws ServletException, 
                    IOException {
    getServletContext().log("LogServlet: in the doPut() method");
  } 
  public void doDelete(HttpServletRequest request, 
                       HttpServletResponse response) throws ServletException, 
                       IOException {
    getServletContext().log("LogServlet: in the doDelete() method");
  } 
  public void destroy() {
    getServletContext().log("LogServlet: in the destroy() method");
  } 
}