Example usage for javax.servlet ServletException ServletException

Introduction

In this page you can find the example usage for javax.servlet ServletException ServletException.

Prototype

public ServletException(Throwable rootCause) 

Source Link

Document

Constructs a new servlet exception when the servlet needs to throw an exception and include a message about the "root cause" exception that interfered with its normal operation.

Usage

From source file:com.ixcode.framework.web.struts.StrutsHandler.java

/**
 * Struts returns null if the forward name is not found so this wraps it to make sure we get an exception.
 *//*from  w w w . j  a va  2 s .  c  om*/
public static ActionForward findForward(ActionMapping mapping, String name) throws ServletException {
    ActionForward forward = mapping.findForward(name);
    if (forward == null) {
        if (log.isDebugEnabled()) {
            log.debug("<findForward> : Could not find a forward with the name '" + name + "'");
        }
        throw new ServletException(
                "Could not find the action mapping with name '" + name + "' in struts config ActionMappings");
    }

    if (log.isDebugEnabled()) {
        log.debug("<findForward> : forward name = '" + name + "', returning a forward url of '"
                + forward.getPath() + "'");
    }
    return forward;
}

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From source file:MyServlet.java

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, java.io.IOException {

    RequestDispatcher dispatcher = null;
    String param = request.getParameter("go");
    if (param == null)
        throw new ServletException("Missing parameter in Controller.");
    else if (param.equals("weather"))
        dispatcher = getServletContext().getNamedDispatcher("Weather");
    else if (param.equals("maps"))
        dispatcher = getServletContext().getNamedDispatcher("Maps");
    else/*  ww w  .  j  a  v  a 2  s .c  o  m*/
        throw new ServletException("Improper parameter passed to Controller.");
    /*check for a null dispatcher, then 
    dispatch the request to the correct URL*/
    if (dispatcher != null)
        dispatcher.forward(request, response);
    else
        throw new ServletException("Controller received a null dispatcher.");
}

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From source file:MyServlet.java

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, java.io.IOException {

    //redirect the user depending on the value of the 'go' param
    String destination = getInitParameter("go");
    String contextPath = request.getContextPath();

    if (destination == null || destination.equals(""))
        throw new ServletException("Missing or invalid 'go' parameter in " + getClass().getName());

    if (destination.equals("weather"))
        //ensure URL rewriting
        response.sendRedirect(response.encodeRedirectURL(contextPath + "/weather"));

    if (destination.equals("maps"))
        //ensure URL rewriting
        response.sendRedirect(response.encodeRedirectURL(contextPath + "/maps"));
}

---

From source file:SendMp3.java

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    String fileName = (String) request.getParameter("file");
    if (fileName == null || fileName.equals(""))
        throw new ServletException("Invalid or non-existent file parameter in SendMp3 servlet.");

    if (fileName.indexOf(".mp3") == -1)
        fileName = fileName + ".mp3";

    String mp3Dir = getServletContext().getInitParameter("mp3-dir");
    if (mp3Dir == null || mp3Dir.equals(""))
        throw new ServletException("Invalid or non-existent mp3Dir context-param.");

    ServletOutputStream stream = null;/*w ww  .j  a va  2 s .co  m*/
    BufferedInputStream buf = null;
    try {

        stream = response.getOutputStream();
        File mp3 = new File(mp3Dir + "/" + fileName);

        //set response headers
        response.setContentType("audio/mpeg");

        response.addHeader("Content-Disposition", "attachment; filename=" + fileName);

        response.setContentLength((int) mp3.length());

        FileInputStream input = new FileInputStream(mp3);
        buf = new BufferedInputStream(input);
        int readBytes = 0;
        //read from the file; write to the ServletOutputStream
        while ((readBytes = buf.read()) != -1)
            stream.write(readBytes);
    } catch (IOException ioe) {
        throw new ServletException(ioe.getMessage());
    } finally {
        if (stream != null)
            stream.close();
        if (buf != null)
            buf.close();
    }
}

---

From source file:XsltDomServlet.java

public void init() throws ServletException {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    try {/*from w  w w  .  ja v a  2  s .c  o m*/
        DocumentBuilder db = dbf.newDocumentBuilder();
        dom = db.getDOMImplementation();
    } catch (ParserConfigurationException pce) {
        throw new ServletException(pce);
    }

    // prepare the XSLT transformer
    TransformerFactory tf = TransformerFactory.newInstance();
    StreamSource ss = new StreamSource("/var/www/stylesheets/paramTable.xslt");
    try {
        transformer = tf.newTransformer(ss);
    } catch (TransformerConfigurationException tce) {
        throw new ServletException(tce);
    }
}

---

From source file:SendWord.java

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    //get the 'file' parameter
    String fileName = (String) request.getParameter("file");
    if (fileName == null || fileName.equals(""))
        throw new ServletException("Invalid or non-existent file parameter in SendWord servlet.");

    // add the .doc suffix if it doesn't already exist
    if (fileName.indexOf(".doc") == -1)
        fileName = fileName + ".doc";

    String wordDir = getServletContext().getInitParameter("word-dir");
    if (wordDir == null || wordDir.equals(""))
        throw new ServletException("Invalid or non-existent wordDir context-param.");
    ServletOutputStream stream = null;/*w w w. j  a  va 2 s . com*/
    BufferedInputStream buf = null;
    try {
        stream = response.getOutputStream();
        File doc = new File(wordDir + "/" + fileName);
        response.setContentType("application/msword");
        response.addHeader("Content-Disposition", "attachment; filename=" + fileName);
        response.setContentLength((int) doc.length());
        FileInputStream input = new FileInputStream(doc);
        buf = new BufferedInputStream(input);
        int readBytes = 0;
        while ((readBytes = buf.read()) != -1)
            stream.write(readBytes);
    } catch (IOException ioe) {
        throw new ServletException(ioe.getMessage());
    } finally {
        if (stream != null)
            stream.close();
        if (buf != null)
            buf.close();
    }
}

---

From source file:EmailJndiServlet.java

public void init() throws ServletException {

    Context env = null;//from w w  w.ja v  a 2 s  .c om

    try {

        env = (Context) new InitialContext();

        mailSession = (Session) env.lookup("MyEmail");

        if (mailSession == null)
            throw new ServletException("MyEmail is an unknown JNDI object");

        //close the InitialContext
        env.close();

    } catch (NamingException ne) {

        try {
            env.close();
        } catch (NamingException nex) {
        }

        throw new ServletException(ne);

    }

}

---

From source file:SendXml.java

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    //get the 'file' parameter
    String fileName = (String) request.getParameter("file");
    if (fileName == null || fileName.equals(""))
        throw new ServletException("Invalid or non-existent file parameter in SendXml servlet.");

    // add the .doc suffix if it doesn't already exist
    if (fileName.indexOf(".xml") == -1)
        fileName = fileName + ".xml";

    String xmlDir = getServletContext().getInitParameter("xml-dir");
    if (xmlDir == null || xmlDir.equals(""))
        throw new ServletException("Invalid or non-existent xmlDir context-param.");

    ServletOutputStream stream = null;/*  w  w  w . java 2 s.com*/
    BufferedInputStream buf = null;
    try {

        stream = response.getOutputStream();
        File xml = new File(xmlDir + "/" + fileName);
        response.setContentType("text/xml");
        response.addHeader("Content-Disposition", "attachment; filename=" + fileName);

        response.setContentLength((int) xml.length());
        FileInputStream input = new FileInputStream(xml);
        buf = new BufferedInputStream(input);
        int readBytes = 0;
        while ((readBytes = buf.read()) != -1)
            stream.write(readBytes);
    } catch (IOException ioe) {
        throw new ServletException(ioe.getMessage());
    } finally {
        if (stream != null)
            stream.close();
        if (buf != null)
            buf.close();
    }
}

---

From source file:UrlServlet.java

public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    //get the 'file' parameter
    String fileName = (String) request.getParameter("file");
    if (fileName == null || fileName.equals(""))
        throw new ServletException("Invalid or non-existent file parameter in UrlServlet servlet.");

    if (fileName.indexOf(".pdf") == -1)
        fileName = fileName + ".pdf";

    URL pdfDir = null;// ww w. j a v a  2  s . c  om
    URLConnection urlConn = null;
    ServletOutputStream stream = null;
    BufferedInputStream buf = null;
    try {

        pdfDir = new URL(getServletContext().getInitParameter("remote-pdf-dir") + fileName);

    } catch (MalformedURLException mue) {

        throw new ServletException(mue.getMessage());
    }
    try {

        stream = response.getOutputStream();

        //set response headers
        response.setContentType("application/pdf");
        response.addHeader("Content-Disposition", "attachment; filename=" + fileName);

        urlConn = pdfDir.openConnection();
        response.setContentLength((int) urlConn.getContentLength());

        buf = new BufferedInputStream(urlConn.getInputStream());
        int readBytes = 0;

        //read from the file; write to the ServletOutputStream
        while ((readBytes = buf.read()) != -1)
            stream.write(readBytes);
    } catch (IOException ioe) {
        throw new ServletException(ioe.getMessage());
    } finally {
        if (stream != null)
            stream.close();
        if (buf != null)
            buf.close();
    }
}

---

From source file:JndiFilter.java

public void init(FilterConfig filterConfig) throws ServletException {

    this.config = filterConfig;

    try {// w ww.  j  av  a 2 s  . c  om

        env = (Context) new InitialContext();

    } catch (NamingException ne) {

        throw new ServletException(ne);

    }

}

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