一、獲取表單提交的數據html
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form id="" action="doCreateUser.jsp" method="get"> 用戶名:<input type="text" name="userName"/> <input type="submit" value="提交"/> </form> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <% String userName = request.getParameter("userName"); out.print(userName); %> </body> </html>
二、get與post的區別java
三、中文亂碼jsp
四、在請求中存取屬性post
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form id="" action="doCreateUser.jsp" method="post"> 用戶名:<input type="text" name="userName"/> <input type="submit" value="提交"/> </form> <% // 取回提示信息 Object oMess = request.getAttribute("mess"); if (oMess != null) { out.print(oMess.toString()); } %> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <% request.setCharacterEncoding("UTF-8"); String userName = request.getParameter("userName"); //out.print(userName); if (userName.equals("admin")) { // 加入提示信息 request.setAttribute("mess","註冊失敗,更換用戶名。"); request.getRequestDispatcher("createUser.jsp").forward(request, response); //response.sendRedirect("createUser.jsp"); } else { request.setAttribute("mess","註冊成功。"); request.getRequestDispatcher("default.jsp").forward(request, response); //response.sendRedirect("default.jsp"); } %> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <%=(request.getAttribute("mess")).toString() %> </body> </html>
五、轉發與重定向ui