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A step-by-step guide on how to create and invoke Java Servlets from HTML forms. It covers the creation of a simple Java program, saving and compiling the file, registering the servlet in web.xml, starting the Tomcat module, creating registration and login forms using HTML and JavaScript, writing Java programs to invoke servlets, and displaying registration details and user information. The document also includes the code for web.xml, hello.java, form1.html, form1.java, and form2.html files.
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To write programs in Java using Servlets to Invoke basic servlet response page , Invoke servlets from HTML page with minimum form elements , Invoke servlets from HTML forms, do some logical processing in the servlet and display the response. PROCEDURE: STEP1: Create a simple java program invoking a servlet to display some information STEP2: Save the java file and compile it in the command line STEP3: Save the servlet’s file name in the web.xml file STEP4: Open Xampp and start the required module. STEP5: Once the tomcat module starts, in the browser give localhost:8080/hello. STEP6: The output will be displayed in the browser window as hello world. STEP7: Create a simple registration form and login forms using html and stylesheet. STEP8: Write programs in java to invoke servlets for displaying registration details and to proceed further STEP9: Now after filling the registration form successfully just open the localhost:8080/f1 ,to view the registered details of the user in a webpage. STEP10: Now after logining successfully using login html , you will be able to view the user details and information. **PROGRAM: web.xml
**</servlet-mapping>
if(username1.length < 8) { return_value=false; window.alert("user name less than 8 chars"); } if(username1==username2) { return_value=false; window.alert("both ids are same"); form1.txtusername2.value=""; } if(password1.length<6) { return_value=false; window.alert(" pwd should be > 6 char's "); form1.txtpassword1.value=""; form1.txtpassword2.value=""; } if(password1!=password2) { return_ value=false; window.alert("ur password mismatched "); form1.txtpassword1.value=""; form1.txtpassword2.value=""; } return return_value; }