Jsp ajax標記無法在jsp中工作..無法加載標記處理程序類異常

Iam新增了Ajax標記..每當我嘗試執行這些時，HTML部分都按預期工作。但阿賈克斯標籤不工作..Jsp ajax標記無法在jsp中工作..無法加載標記處理程序類異常

獲取無法加載標籤處理類異常「org.ajaxtags.tags.AjaxSelectTag」 ..

<%@ taglib uri="/WEB-INF/ajaxtld/ajaxtags.tld" prefix="ajax" %> 

<html> 
    <head> 
    <title>AJAX JSP Tag Library</title> 



    <script type="text/javascript" src="js/prototype-1.6.0.3.js"></script> 
    <script type="text/javascript" src="js/scriptaculous/scriptaculous.js"></script> 
    <script type="text/javascript" src="js/overlibmws/overlibmws.js"></script> 
    <script type="text/javascript" src="js/ajaxtags-1.2-beta1.js"></script> 



    <link type="text/css" rel="stylesheet" href="/WEB-INF/css/ajaxtags.css" /> 
    <link type="text/css" rel="stylesheet" href="/WEB-INF/css/displaytag.css" /> 
</head> 
<body> 

    <form> 



     Make: 
     <select id = "make" name = "make"> 
      <option value="">Select make</option> 
      <c:forEach items="${makes}" var="make"> 
       <option value="${make}">${make}</option> 
      </c:forEach> 
     </select> 

     Model: 
     <select id="model" name="model" > 
      <option value="">Select model</option> 
     </select> 

     <input type="button" value="read"> 




     <div id="tar"></div> 


    </form> 

    <ajax:select baseUrl="$Sample/samplejava" source="make" target="model" parameters="make={make}" /> 

</body> 
</html>

servlet的部分定義如下..

import java.io.IOException; 
import java.io.PrintWriter; 
import javax.servlet.RequestDispatcher; 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 

public class samplejava extends HttpServlet { 

protected void processRequest(HttpServletRequest request, HttpServletResponse response) 
     throws ServletException, IOException { 
    response.setContentType("text/html;charset=UTF-8"); 
    PrintWriter out = response.getWriter(); 
    try { 
     /* TODO output your page here. You may use following sample code. */ 
     out.println("<!DOCTYPE html>"); 
     out.println("<html>"); 
     out.println("<head>"); 
     out.println("<title>Servlet samplejava</title>"); 
     out.println("</head>"); 
     out.println("<body>"); 
     out.println("<h1>Servlet samplejava at " + request.getContextPath() + "</h1>"); 
     out.println("Here is the response..."); 
     out.println("</body>"); 
     out.println("</html>"); 
    } finally { 
     out.close(); 
    } 
} 

@Override 
protected void doGet(HttpServletRequest request, HttpServletResponse response) 
     throws ServletException, IOException { 
    processRequest(request, response); 

    try { 

     String res = request.getParameter("make"); 
     RequestDispatcher rd = request.getRequestDispatcher("index.jsp"); 
     PrintWriter out = response.getWriter(); 
     out.println(res); 
     response.getWriter().write("hai!! this is response..."); 
     response.sendRedirect("success.jsp"); 
    } catch (Exception e) { 
     response.sendRedirect("error.jsp"); 
    } 
} 

@Override 
public String getServletInfo() { 
    return "Short description"; 
}// </editor-fold> 

}

任何人都可以提出請...

來源

2014-09-04 deeban

使用jQuery/javascript會很容易，很好，靈活，然後ajax標籤。 – 2014-09-04 09:38:27

K.但爲什麼這不起作用？ – deeban 2014-09-04 09:39:43

你可以用你的jre版本驗證ajax標籤jar版本嗎？如果它不同，你可以使用兼容jar來測試你的java版本。 – RE350 2014-09-04 18:31:18

其工作正常，當我剛剛更改doGet（）方法來doPost（）方法..

import java.io.IOException; 
    import java.io.PrintWriter; 
    import javax.servlet.RequestDispatcher; 
    import javax.servlet.ServletException; 
    import javax.servlet.http.HttpServlet; 
    import javax.servlet.http.HttpServletRequest; 
    import javax.servlet.http.HttpServletResponse; 

    public class samplejava extends HttpServlet { 

    protected void processRequest(HttpServletRequest request, 
    HttpServletResponse response)throws ServletException, IOException { 
    response.setContentType("text/html;charset=UTF-8"); 
    PrintWriter out = response.getWriter(); 
    try { 
    /* TODO output your page here. You may use following sample code. */ 
    out.println("<!DOCTYPE html>"); 
    out.println("<html>"); 
    out.println("<head>"); 
    out.println("<title>Servlet samplejava</title>"); 
    out.println("</head>"); 
    out.println("<body>"); 
    out.println("<h1>Servlet samplejava at " + request.getContextPath() + "</h1>"); 
    out.println("Here is the response..."); 
    out.println("</body>"); 
    out.println("</html>"); 
    } finally { 
    out.close(); 
    } 
    } 

    @Override 
    protected void doPost(HttpServletRequest request, HttpServletResponse response)//I just changed the doGet() to doPost(), its working fine 
    throws ServletException, IOException { 
     processRequest(request, response); 

     try { 

    String res = request.getParameter("make"); 
    RequestDispatcher rd = request.getRequestDispatcher("index.jsp"); 
    PrintWriter out = response.getWriter(); 
    out.println(res); 
    response.getWriter().write("hai!! this is response..."); 
    response.sendRedirect("success.jsp"); 
    } catch (Exception e) { 
    response.sendRedirect("error.jsp"); 
    } 
    } 

    @Override 
public String getServletInfo() { 
    return "Short description"; 
    }// </editor-fold> 

     }

來源

2014-09-10 13:25:09 deeban

Jsp ajax標記無法在jsp中工作..無法加載標記處理程序類異常

回答

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