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How to log a message in a Servlet |
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This Java tip illustrates a method of logging a message in a Servlet. The servlet container
provides a simple logging facility for a servlet to log text messages and exceptions.
For a more full-featured logging facility, see the java.util.logging package.
// Add an entry to the log file
getServletContext().log("A message");
try {
// ...
} catch (Exception e) {
// Add an entry to the log file and include an exception
getServletContext().log("An exception occurred", e);
}
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Here's a sample of the log entries in Tomcat:
2002-07-06 21:12:54 A message
2002-07-06 21:12:54 An exception occurred
java.io.IOException
at com.mycompany.MyServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
...
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