I am trying a simple struts application. And I have added few fields in action class and trying to print those fields in JSP class.
Everything is working fine and action methods are called properly except the properties are not printing on JSP page.
And also I cannot see any errors in logs.
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%# taglib prefix="s" uri="/struts-tags" %>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:property value="test" />
</body>
</html>
Action class code :
public class ActionClass {
private String test="hello";
public String execute() {
System.out.println("hello ");
return "success";
}
}
Any help would be appreciated
change your code
public class ActionClass {
private String test="hello";
public String execute() {
System.out.println("hello ");
return "success";
}
//you can remove setter.
public void setTest(String test)
{
this.test = test;
}
public String getTest()
{
return test;
}
}
Make some changes in class--
import com.opensymphony.xwork2.ActionSupport;
public class ActionClass extends ActionSupport{
private String test= "Name from test.java";
public String getTest() {
return test;
}
public String execute() throws Exception {
return SUCCESS;
}
}
Related
I'm using SpringToolSuite with Java and I'm trying to render an index.jsp page onto my localhost:8080, but my Localhost is only going to the Whitelabel error page again & again. I guess it doesn't seem to be recognizing my Homecontroller.java file. The servers are running and have been refreshed. My files are correct. I see no issues anywhere else. What could be wrong that I'm not seeing? How can I render my page?
HomeController.java :
import javax.servlet.http.HttpSession;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
#RequestMapping("/your_server")
public class HomeController {
#RequestMapping("")
public String index(HttpSession session) {
if (session.isNew()) {
session.setAttribute("counter", 0);
}
Integer count = (Integer) session.getAttribute("counter");
count += 1;
session.setAttribute("counter", count);
return "index.jsp";
}
#RequestMapping("/counter")
public String showCounter(HttpSession session, Model model) {
if (session.isNew()) {
session.setAttribute("counter", 0);
}
model.addAttribute("counter", session.getAttribute("counter"));
return "counter.jsp";
}
#RequestMapping("/reset")
public String resetCounter(HttpSession session) {
session.invalidate();
return "forward:/";
}
}
CounterApplication.java:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class CounterApplication {
public static void main(String[] args) {
SpringApplication.run(CounterApplication.class, args);
}
}
index.jsp:
<%# 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>Welcome! Want to count some stuff?</title>
</head>
<body>
How many times has this page been visited?
<p>Oh, hi.</p>
</body>
</html>
<%# taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<c:out value="${2+2}"/>
counter.jsp:
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>How many times are we going to go through this?!</title>
</head>
<body>
<c:out value="${ counter }" />
Go back.
Reset the counter.
</body>
</html>
So to be more specific what Im trying to solve. How can I show the first element in my Arraylist:"sortedDomainList" in my jsp?
EDIT : Model and ArrayList working tried in normal java application.
MODEL short version.
public ArrayList<String> sortedDomainList = new ArrayList<String>();
public ArrayList<String> getSortedDomainList() {
return sortedDomainList;
}
public void setSortedDomainList(ArrayList<String> sortedDomainList) {
this.sortedDomainList = sortedDomainList;
}
}
CONTROLLER/SERVLET
package com.comparebet.controller;
import com.comparebet.model.*;
#WebServlet("/Controller")
public class Controller extends HttpServlet {
private static final long serialVersionUID = 1L;
public Controller() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
ArrayList<String> sortedDomainList = new BeanModel().getSortedDomainList();
request.setAttribute("d", sortedDomainList);
RequestDispatcher view = request.getRequestDispatcher("view.jsp");
view.forward(request, response);
}
}
VIEW/JSP
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>CompareBet</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/Comparebet" method="get" accept-charset="UTF-8"></form>
<h1> ${d.sortedDomainList[0]}</h1>
</body>
</html>
This is my first try on MVC so I feel really lost when it comes down to servlet.
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>CompareBet</title>
</head>
<body>
<%
ArrayList<String> sortedDomainList= request.getAttribute("d");
for(String domain:sortedDomainList){
%>
<h1> <%= domain %> </h1>
<% } %>
</body>
</html>
I am new to Struts 2 and trying to do use fileUpload interceptor. I am attaching all my code layers
Action Class (FileUploadAction):
package com.caveofprogramming.actions;
import java.io.File;
import org.apache.struts2.convention.annotation.InterceptorRef;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import com.opensymphony.xwork2.ActionSupport;
public class FileUploadAction extends ActionSupport{
private File fileUpload;
private String fileUploadContentType;
private String fileUploadFileName;
public String getFileUploadContentType() {
return fileUploadContentType;
}
public void setFileUploadContentType(String fileUploadContentType) {
this.fileUploadContentType = fileUploadContentType;
}
public String getFileUploadFileName() {
return fileUploadFileName;
}
public void setFileUploadFileName(String fileUploadFileName) {
this.fileUploadFileName = fileUploadFileName;
}
public File getFileUpload() {
return fileUpload;
}
public void setFileUpload(File fileUpload) {
this.fileUpload = fileUpload;
}
#Action( value = "/fileUpload",
results={#Result(name="success",location="/success.jsp"),
#Result(name="error",location="/error.jsp"),
#Result(name="input",location="/error.jsp")
},
interceptorRefs={
#InterceptorRef(
params={"allowedTypes","image/jpeg,image/jpg,application/zip",
"maximumSize","1024000"},
value="fileUpload"
),
#InterceptorRef("defaultStack"),
#InterceptorRef("validation")
}
)
public String execute(){
try{
return SUCCESS;
} catch(Exception e){
return ERROR;
}
}
public String display() {
return NONE;
}
}
error.jsp:
<%# taglib prefix="s" uri="/struts-tags" %>
<html>
<body>
<s:fielderror/>
</body>
</html>
Success.jsp:
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%# taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
Success
</body>
</html>
fileUpload.jsp:
<%# taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<s:head />
</head>
<body>
<h1>Struts 2 <s:file> file upload example</h1>
<s:form method="post" enctype="multipart/form-data" action="fileUpload">
<s:file label="File One" name="fileUpload" />
<s:submit />
</s:form>
</body>
</html>
I am not understanding why I am getting this error
"Content-Type not allowed: fileUpload "photography-104a.jpg" "upload_37fbf440_169b_4687_af65_93c8c967256c_00000000.tmp" image/pjpeg"
Although my uploading file format is .jpg.
You are getting this error probably because you don't allow files with content type image/pjpeg. Use parameter of fileUpload interceptor to define allowed MIME types
<interceptor-ref name="fileUpload">
<param name="allowedTypes">image/jpeg,image/pjpeg</param>
</interceptor-ref>
I am trying to pass an ArrayList of objects from a servlet to a jsp file but when I try printing it, it prints nothing. I used the exact lines from a similar post for the jsp...can someone help me because I have never used a jsp before.
The idea is to to traverse through an xml file using dom parser and then print its elements to an html table of a specific form. My java code successfully collects all the elements and stores them in a list which I want to pass in the jsp to format in the table asked...
SERVLET CODE (with missing pieces cause it's huge) :
import all the needed libraries
public class MyServlet extends HttpServlet {
private static xml_obj obj = null;
public static ArrayList<xml_obj> objList = new ArrayList<xml_obj>();
public static void main(String[] args){
try {
Start(); //starting the methods for the xml traversal and creates the list
//System.out.println("AA"+objList.get(1).getName());
}
catch(Exception e) {
e.getMessage();
}
}
public void doPost (HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
ArrayList list = getList();
//System.out.println(objList.get(1).getName());
request.setAttribute ("Xml_objList", objList );
RequestDispatcher view = request.getRequestDispatcher("DomNav.jsp");
view.forward (request,response);
}
static void Start(){
/*..........code missing.............*/
myDOMTreeProc dtp = new myDOMTreeProc();
dtp.processLvl(ListOfCh, 0); //processLvl -> method in myDOMTreeProc
}
public static ArrayList<xml_obj> getList() {
return objList;
}
}
class myDOMTreeProc {
/*........DOM XML TRAVERSE.......*/
}
class attribute {
private String Name;
private String Value;
/*.............setters/getters.......*/
}
class xml_obj {
public int Lvl;
private String Name;
private String Value;
private String Parent;
private ArrayList<attribute> attributes=null;
/*.............setters/getters.......*/
}
JSP CODE:
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%#page import="java.util.*" %>
<!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=ISO-8859-1">
<title>Expression Language Example</title>
</head>
<body>
<h1>TEST JSP</h1>
<% ArrayList list = (ArrayList) request.getAttribute("Xml_objList"); %>
<c:forEach var="item" items="${Xml_objList}">
${item.Lvl}
</c:forEach>
</body>
</html>
The list is correct I tested it. I think the problem is when I pass it in the jsp.
Follow Java Naming convention and everything will work fine. Just replace int Lvl with int lvl;
JSP:
<c:forEach var="item" items="${Xml_objList}">
${item.lvl}
</c:forEach>
Instead of ${item.lvl} you can try with ${item.getLvl()} or ${item['lvl']}
I am trying to make a web project. My question can I display java properties on the JSP page using JSTL? I am quite new in JSP.
As far I am now , I created the login page which is handled by servlet. What I want to achieve is that user log in with his credentials. And based on the credentials the data are processed on the background and displayed on page. (after login user clicks on page my info and the data are automatically populated). Creating another servlet is not a good option, so I probably need to call the data from the normal class(without needing a form).
Login.jsp
<form action="LoginServlet" method="post">
<table>
<tr><td>Login : </td><td><input type="text" name="login"/></td></tr>
<tr><td>Password :</td><td><input type="password" name="password"/></td></tr>
<tr><td><input type="submit" value="Login"/></td><td></td></tr>
</table>
</form>
LoginServlet.java
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String login = request.getParameter("login");
String password = request.getParameter("password");
request.setAttribute("login", login);
request.setAttribute("password", password);
LoginService.setPublicID(login);
boolean result = LoginService.Auth(login, password);
System.out.println(result);
if(result==true){
getServletContext().getRequestDispatcher("/main.jsp").forward(request, response);
}
else{
response.sendRedirect("login.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
LoginService.java (auth. handler) [i used static publicID because based on this, other stuff is done]
public class LoginService {
public static String publicID;
public static String getPublicID() {
return publicID;
}
public static void setPublicID(String login) {
LoginService.publicID = login;
}
public static boolean Auth(String login, String password){
System.out.println(password);
if(password.equals("gw") && login.equals("servo")){
return true;
}
else
{
return false;
}
}
}
This redirects me to the main.jsp.
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h2>Login successful!</h2>
UserInfo
Welcome <c:out value="${login}"/>
</body>
</html>
UserInfoService.java
public class UserInfoService {
static String userName;
static String lastName;
static String mobile;
static String email;
public static String getUserName() {
return userName;
}
public static void setUserName(String userName) {
userName = LoginService.getPublicID();
UserInfoService.userName = userName;
}
public static String getEmail() {
return email;
}
public static void setEmail(String email) {
UserInfoService.email = email;
}
}
And finally.
UserInfo.jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%# page import="org.UserInfo.UserInfoService"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<c:out value="${UserInfoService.getUserName}"/>
</body>
</html>
But this is always empty. Can you please tell me where I am wrong?
UserInfoService resolves to null, You need to register it as a bean see here
You are not calling the UserInfoService.setUserName() method from anywhere in the code.