{"id":177,"date":"2022-12-06T09:51:09","date_gmt":"2022-12-06T09:51:09","guid":{"rendered":"http:\/\/javigomez.org\/?p=177"},"modified":"2025-09-29T20:34:20","modified_gmt":"2025-09-29T20:34:20","slug":"crear-un-servlet-en-xampp","status":"publish","type":"post","link":"https:\/\/javigomez.org\/index.php\/2022\/12\/06\/crear-un-servlet-en-xampp\/","title":{"rendered":"Crear un servlet en xampp"},"content":{"rendered":"\n

En esta pieza, voy a crear un servlet sencillo dentro de un xampp<\/p>\n\n\n\n

Nos vamos al directorio:<\/p>\n\n\n\n

C:\\xampp\\tomcat\\webapps<\/strong><\/p>\n\n\n\n

En este directorio creamos el directorio de la aplicaci\u00f3n (en nuestro caso javi), y dentro de ello creamos el directorio WEB-INF. Dentro de WEB-INF creamos el directorio classes<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Dentro del directorio classes podemos meter el fuente de nuestro primer servlet<\/p>\n\n\n\n

import java.io.*;\nimport javax.servlet.http.*;\nimport javax.servlet.*;\npublic class HelloServlet extends HttpServlet {\n\u00a0 public void doGet (HttpServletRequest req,\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0HttpServletResponse res)\n\u00a0 \u00a0 throws ServletException, IOException\n\u00a0 {\n\u00a0 \u00a0 PrintWriter out = res.getWriter();\n\u00a0 \u00a0 out.println(\"Hola Javi\");\n\u00a0 \u00a0 out.close();\n\u00a0 }\n}\n<\/code><\/pre>\n\n\n\n
Para compilar utilizamos el comando javac, pero es necesario especificar un classpath a las librer\u00edas de servlet<\/p>\n\n\n\n
javac HelloServlet.java -classpath C:\\xampp\\tomcat\\lib\\servlet-api.jar <\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
Dentro del directorio de WEB-INF, creamos el archivo web.xml, que ser\u00e1 el que contenga la descripci\u00f3n de nuestro servlet<\/p>\n\n\n\n
web.xml\n\n<web-app xmlns=\"http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\"\n\u00a0 xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\n\u00a0 xsi:schemaLocation=\"http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\/web-app_3_1.xsd\"\n\u00a0 version=\"3.1\"\n\u00a0 metadata-complete=\"true\">\n\u00a0 <servlet>\n\u00a0 \u00a0 <servlet-name>hello<\/servlet-name>\n\u00a0 \u00a0 <servlet-class>HelloServlet<\/servlet-class>\n\u00a0 <\/servlet>\n\u00a0 <servlet-mapping>\n\u00a0 \u00a0 <servlet-name>hello<\/servlet-name>\n\u00a0 \u00a0 <url-pattern>\/hello<\/url-pattern>\n\u00a0 <\/servlet-mapping>\n<\/web-app>\n<\/code><\/pre>\n\n\n\n
En esta configuraci\u00f3n decimos el nombre del servlet y como se llama la clase que ejecuta en la secci\u00f3n de <servlet><\/p>\n\n\n\n
En la secci\u00f3n de <servlet-mapping> decimos ese mismo nombre de servlet y la url que tenemos que introducir para ejecutarse<\/p>\n\n\n\n
Ahora solo queda apagar y encender el tomcat y probarlo<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
Si creamos otro servlet dentro de la misma aplicaci\u00f3n, podr\u00eda ser este:<\/p>\n\n\n\n
import java.io.*;\nimport javax.servlet.http.*;\nimport javax.servlet.*;\npublic class aa extends HttpServlet {\n\u00a0 public void doGet (HttpServletRequest req,\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0HttpServletResponse res)\n\u00a0 \u00a0 throws ServletException, IOException\n\u00a0 {\n\u00a0 \u00a0 PrintWriter out = res.getWriter();\n\u00a0 \u00a0 out.println(\"<b>AA<\/b> est\u00e1 en negrita \");\n\u00a0 \u00a0 out.close();\n\u00a0 }\n<\/code><\/pre>\n\n\n\n
Se compila<\/p>\n\n\n\n
javac aa.java -classpath C:\\xampp\\tomcat\\lib\\servlet-api.jar\n<\/code><\/pre>\n\n\n\n
Se configura en web.xml<\/p>\n\n\n\n
<web-app xmlns=\"http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\"\n\u00a0 xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\n\u00a0 xsi:schemaLocation=\"http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\/web-app_3_1.xsd\"\n\u00a0 version=\"3.1\"\n\u00a0 metadata-complete=\"true\">\n\u00a0 <servlet>\n\u00a0 \u00a0 <servlet-name>hello<\/servlet-name>\n\u00a0 \u00a0 <servlet-class>HelloServlet<\/servlet-class>\n\u00a0 <\/servlet>\n\u00a0 <servlet-mapping>\n\u00a0 \u00a0 <servlet-name>hello<\/servlet-name>\n\u00a0 \u00a0 <url-pattern>\/hello<\/url-pattern>\n\u00a0 <\/servlet-mapping>\n\u00a0 <servlet>\n\u00a0 \u00a0 <servlet-name>negro<\/servlet-name>\n\u00a0 \u00a0 <servlet-class>aa<\/servlet-class>\n\u00a0 <\/servlet>\n\u00a0 <servlet-mapping>\n\u00a0 \u00a0 <servlet-name>negro<\/servlet-name>\n\u00a0 \u00a0 <url-pattern>\/aanegro<\/url-pattern>\n\u00a0 <\/servlet-mapping>\n<\/code><\/pre>\n\n\n\n
Se apaga y enciende tomcat y se prueba<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
En esta pieza, voy a crear un servlet sencillo dentro de un xampp Nos vamos al directorio: C:\\xampp\\tomcat\\webapps En este directorio creamos el directorio de … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[302,330,347,348],"class_list":["post-177","post","type-post","status-publish","format-standard","hentry","category-tomcat","tag-servlet","tag-tomcat","tag-web-inf","tag-web-xml"],"_links":{"self":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/comments?post=177"}],"version-history":[{"count":1,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/177\/revisions"}],"predecessor-version":[{"id":970,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/177\/revisions\/970"}],"wp:attachment":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/media?parent=177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/categories?post=177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/tags?post=177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}