[Reference link] ・ About the display of the Html pull-down menu (https://murashun.jp/blog/20200128-66.html) ・ Html Create multi-line text input form (http://www.htmq.com/html/textarea.shtml)
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Inquiry form</title>
</head>
<body>
<%--Ready to insert form--%>
<form action="/example/P157_s" method="post">
<%--Name input tab--%>
name<input type="text" name="name"><br>
<%--Inquiry type selection tab--%>
<select name="qtype">
<option value="company">About the company</option>
<option value="product">About product</option>
<option value="support">After-sales support</option>
</select>
<%--Inquiry content input tab--%>
<p>Please enter your inquiry</p>
<textarea name="body" rows="4" cols="40">
</textarea><br>
<%--Submit button--%>
<input type="submit" value="Send">
</form>
</body>
</html>
package p157_s;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/P157_s")
public class P157_s extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
String name=request.getParameter("name");
String slags=request.getParameter("qtype");
String comment=request.getParameter("body");
//java code
String errorM="";
if(name==null||name.length()==0) {errorM+="No name has been entered";}
if(slags==null||slags.length()==0) {errorM+="Inquiry type not selected";}
else if(slags.equals("company")){slags="About the company";}
else if(slags.equals("product")){slags="About the product";}
else if(slags.equals("support")){slags="After-sales support";}
if(comment==null||comment.length()==0) {errorM+="Your inquiry has not been entered";}
String msg=("Full name["+name+"]Type of inquiry["+slags+"]Inquiry content["+comment+"]");
if(errorM.length()!=0) {msg=errorM;}
response.setContentType("text/html; charset=UTF-8");
PrintWriter out=response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Inquiry form</title>");
out.println("</head>");
out.println("<meta.charSet=\"UTF-8\">");
out.println("<body>");
out.println("<p>"+msg+"</p>");
out.println("</body>");
out.println("</html>");
}
}
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