1 package com.yunqing.servlet; 2 3 import javax.servlet.*; 4 import java.io.IOException; 5 import java.util.Arrays; 6 import java.util.Enumeration; 7 import java.util.Map; 8 9 public class LoginServlet implements Servlet { 10 11 @Override 12 public void init(ServletConfig servletConfig) throws ServletException { 13 14 } 15 16 @Override 17 public ServletConfig getServletConfig() { 18 return null; 19 } 20 21 @Override 22 public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException { 23 //1. 24 System.out.println(servletRequest.getParameter("user") + "," + servletRequest.getParameter("password")); 25 //2. 26 String[] arr = servletRequest.getParameterValues("interesting"); 27 for (String s : arr) { 28 System.out.println("--------" + s); 29 } 30 //3. 31 Enumeration<String> names = servletRequest.getParameterNames(); 32 while (names.hasMoreElements()) { 33 String name = names.nextElement(); 34 String value = servletRequest.getParameter(name); 35 System.out.println(name + "," +value); 36 } 37 //4. 38 Map<String,String[]> map = servletRequest.getParameterMap(); 39 for (Map.Entry<String, String[]> en : map.entrySet()) { 40 System.out.println(en.getKey() + ":" + Arrays.asList(en.getValue())); 41 } 42 } 43 44 @Override 45 public String getServletInfo() { 46 return null; 47 } 48 49 @Override 50 public void destroy() { 51 52 } 53 }
前台页面：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>login</title> </head> <body> <form action="LoginServlet" method="post"> user:<input type="text" name="user"> password:<input type="password" name="password"> <br><br> interesting: <input type="checkbox" name="interesting" value="reading">Read <input type="checkbox" name="interesting" value="game">game <input type="checkbox" name="interesting" value="football">football <input type="checkbox" name="interesting" value="learn">learn <input type="checkbox" name="interesting" value="other">other <input type="submit" value="submit"> </form> </body> </html>
结果图：
