iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added error handling policies for javax-servlets module

This commit is contained in:
Timoteo Ponce 2018-06-11 09:48:24 -04:00
parent a54c9e0c9e
commit 3d602e6398
5 changed files with 77 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
javax-servlets/src/main/java/com/baeldung/servlets/ErrorHandlerServlet.java Normal file
View File

@ -0,0 +1,34 @@
package com.baeldung.servlets;
import javax.servlet.annotation.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import static javax.servlet.RequestDispatcher.*;
@WebServlet(urlPatterns = "/errorHandler")
public class ErrorHandlerServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/html; charset=utf-8");
try (PrintWriter writer = resp.getWriter()) {
writer.write("<html><head><title>Error description</title></head><body>");
writer.write("<h2>Error description</h2>");
writer.write("<ul>");
Arrays.asList(ERROR_STATUS_CODE, ERROR_EXCEPTION_TYPE, ERROR_MESSAGE)
.forEach(e ->
writer.write("<li>" + e + ":" + req.getAttribute(e) + " </li>")
);
writer.write("</ul>");
writer.write("</html></body>");
}
Exception exception = (Exception) req.getAttribute(ERROR_EXCEPTION);
if (IllegalArgumentException.class.isInstance(exception)) {
getServletContext().log("Error on an application argument", exception);
}
}
}

13
javax-servlets/src/main/java/com/baeldung/servlets/RandomErrorServlet.java Normal file
View File

@ -0,0 +1,13 @@
package com.baeldung.servlets;
import javax.servlet.annotation.*;
import javax.servlet.http.*;
@WebServlet(urlPatterns = "/randomError")
public class RandomErrorServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, final HttpServletResponse resp) {
throw new IllegalStateException("Random error");
}
}

16
javax-servlets/src/main/webapp/WEB-INF/web.xml Normal file
View File

@ -0,0 +1,16 @@
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<error-page>
<error-code>404</error-code>
<location>/error-404.html</location> <!-- /src/main/webapp/error-404.html-->
</error-page>
<error-page>
<exception-type>java.lang.Exception</exception-type>
<location>/errorHandler</location>
</error-page>
</web-app>

14
javax-servlets/src/main/webapp/error-404.html Normal file
View File

@ -0,0 +1,14 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Error page</title>
</head>
<body>
<h2>Error: Page not found</h2>
<a href="./">Go back home</a>
</body>
</html>

3
spring-boot-ops/README.MD
View File

@ -1,3 +0,0 @@
### Relevant Articles:
- [Deploy a Spring Boot WAR into a Tomcat Server](http://www.baeldung.com/spring-boot-war-tomcat-deploy)