ActionErrors validate() method gives null pointer exception error.........

[Dipali yadav]

Hello all,

I am working with struts 1.2. I want to validate one form using ActionErrors validate() method.
But when try to open my jsp page, it gives me null pointer exception for it.
I am using weblogic server....

Here is the error


Error 500--Internal Server Error
java.lang.NullPointerException
at com.otto.lisa.web.NewUserForm.validate(NewUserForm.java:434)
at org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:893)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:247)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:505)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:251)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1014)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:417)
at org.apache.struts.action.RequestProcessor.processActionForward(RequestProcessor.java:390)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:271)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3498)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)


Please help..........its urgent...

Thanks in advance.

[jatan bhavsar]

hi Dipali,

Please carefully look at the stack trace it shows the error at

at com.otto.lisa.web.NewUserForm.validate(NewUserForm.java:434)

.. Post the code for the NewUserForm.java.

The error line is mentioned. Post some more info with code.

Jatan

[Dipali yadav]

jatan bhavsar wrote:hi Dipali,

Please carefully look at the stack trace it shows the error at

at com.otto.lisa.web.NewUserForm.validate(NewUserForm.java:434)

.. Post the code for the NewUserForm.java.

The error line is mentioned. Post some more info with code.

Jatan

Thanks for the reply Jatan

Here is my code for NewUserForm.java

package com;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import com.otto.lisa.utils.LisaForm;
import com.otto.lisa.utils.vo.UsersVO;

public class NewUserForm extends ActionForm{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	private int userId;

	private String userName;

	private String firstName;

	private String lastName;

	private String email;

	private String password;

	private String confirmPassword;

	private int maxUserSessions;

	private String liefNr;

	private String liefUnterKz;

	private String bdfKz;

	private boolean admin = false;

	private String appType;

	private boolean locked = false;

	private boolean active;

	private String submitButtonSave;

	private String submitButtonReset = null;

	private String submitButtonSearch;

	private boolean editFlag;

		/**
	 * @return the userName
	 */
	public String getUserName() {
		return userName;
	}

	/**
	 * @param userName
	 *            the userName to set
	 */
	public void setUserName(String userName) {
		this.userName = userName;
	}

	/**
	 * @return the firstName
	 */
	public String getFirstName() {
		return firstName;
	}

	/**
	 * @param firstName
	 *            the firstName to set
	 */
	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}

	/**
	 * @return the lastName
	 */
	public String getLastName() {
		return lastName;
	}

	/**
	 * @param lastName
	 *            the lastName to set
	 */
	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	/**
	 * @return the email
	 */
	public String getEmail() {
		return email;
	}

	/**
	 * @param email
	 *            the email to set
	 */
	public void setEmail(String email) {
		this.email = email;
	}

	/**
	 * @return the password
	 */
	public String getPassword() {
		return password;
	}

	/**
	 * @param password
	 *            the password to set
	 */
	public void setPassword(String password) {
		this.password = password;
	}

	/**
	 * @return the maxUserSessions
	 */
	public int getMaxUserSessions() {
		return maxUserSessions;
	}

	/**
	 * @param maxUserSessions
	 *            the maxUserSessions to set
	 */
	public void setMaxUserSessions(int maxUserSessions) {
		this.maxUserSessions = maxUserSessions;
	}

	/**
	 * @return the liefNr
	 */
	public String getLiefNr() {
		return liefNr;
	}

	/**
	 * @param liefNr
	 *            the liefNr to set
	 */
	public void setLiefNr(String liefNr) {
		this.liefNr = liefNr;
	}

	/**
	 * @return the admin
	 */
	public boolean isAdmin() {
		return admin;
	}

	/**
	 * @param admin
	 *            the admin to set
	 */
	public void setAdmin(boolean admin) {
		this.admin = admin;
	}

	/**
	 * @return the locked
	 */
	public boolean isLocked() {
		return locked;
	}

	/**
	 * @param locked
	 *            the locked to set
	 */
	public void setLocked(boolean locked) {
		this.locked = locked;
	}

	/**
	 * @return the active
	 */
	public boolean isActive() {
		return active;
	}

	/**
	 * @param active
	 *            the active to set
	 */
	public void setActive(boolean active) {
		this.active = active;
	}

	/**
	 * @return the submitButtonSave
	 */
	public String getSubmitButtonSave() {
		return submitButtonSave;
	}

	/**
	 * @param submitButtonSave
	 *            the submitButtonSave to set
	 */
	public void setSubmitButtonSave(String submitButtonSave) {
		this.submitButtonSave = submitButtonSave;
	}

	/**
	 * @return the submitButtonReset
	 */
	public String getSubmitButtonReset() {
		return submitButtonReset;
	}

	/**
	 * @param submitButtonReset
	 *            the submitButtonReset to set
	 */
	public void setSubmitButtonReset(String submitButtonReset) {
		this.submitButtonReset = submitButtonReset;
	}

	/**
	 * @return the submitButtonSearch
	 */
	public String getSubmitButtonSearch() {
		return submitButtonSearch;
	}

	/**
	 * @param submitButtonSearch
	 *            the submitButtonSearch to set
	 */
	public void setSubmitButtonSearch(String submitButtonSearch) {
		this.submitButtonSearch = submitButtonSearch;
	}

	
	/**
	 * @return the userId
	 */
	public int getUserId() {
		return userId;
	}

	/**
	 * @param userId
	 *            the userId to set
	 */
	public void setUserId(int userId) {
		this.userId = userId;
	}

	/**
	 * @return the editFlag
	 */
	public boolean isEditFlag() {
		return editFlag;
	}

	/**
	 * @param editFlag
	 *            the editFlag to set
	 */
	public void setEditFlag(boolean editFlag) {
		this.editFlag = editFlag;
	}

	/**
	 * @return the confirmPassword
	 */
	public String getConfirmPassword() {
		return confirmPassword;
	}

	/**
	 * @param confirmPassword
	 *            the confirmPassword to set
	 */
	public void setConfirmPassword(String confirmPassword) {
		this.confirmPassword = confirmPassword;
	}

	/**
	 * @return the appType
	 */
	public String getAppType() {
		return appType;
	}

	/**
	 * @param appType
	 *            the appType to set
	 */
	public void setAppType(String appType) {
		this.appType = appType;
	}

	/**
	 * @return the liefUnterKz
	 */
	public String getLiefUnterKz() {
		return liefUnterKz;
	}

	/**
	 * @param liefUnterKz
	 *            the liefUnterKz to set
	 */
	public void setLiefUnterKz(String liefUnterKz) {
		this.liefUnterKz = liefUnterKz;
	}

	/**
	 * @return the bdfKz
	 */
	public String getBdfKz() {
		return bdfKz;
	}

	/**
	 * @param bdfKz
	 *            the bdfKz to set
	 */
	public void setBdfKz(String bdfKz) {
		this.bdfKz = bdfKz;
	}

	
	@Override
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
	
		ActionErrors errors = null;
		
		String lowerCaseChars = "(.*[a-z].*)";

		String upperCaseChars = "(.*[A-Z].*)";

		String numbers = "(.*[0-9].*)";

		String specialChars = "(.*[,~,!,@,#,$,%,^,&,*,(,),-,_,=,+,[,{,],},|,;,:,<,>,/,?].*$)";
		
		if(this.getUserName() == null || this.getUserName().equals("") || this.getUserName().isEmpty()){
			if (errors == null)
				errors = new ActionErrors();
			errors.add("userName", new ActionError("newuser.username.required"));
		}
		if(this.getPassword() == null || this.getPassword().equals("") || this.getPassword().isEmpty()){
			if (errors == null)
				errors = new ActionErrors();
			errors.add("password", new ActionError("newuser.password.required"));
		}
		if (this.getPassword().trim().length() < 8) {
			if (errors == null)
				errors = new ActionErrors();
			errors.add("securepassword",new ActionError("newuser.securepassword"));
		} 
		if (!this.getPassword().matches(upperCaseChars)) {
			if (errors == null)
				errors = new ActionErrors();
			errors.add("securepassword",new ActionError("newuser.securepassword"));
		} else if (!this.getPassword().matches(lowerCaseChars)) {
			if (errors == null)
				errors = new ActionErrors();
			errors.add("securepassword",new ActionError("newuser.securepassword"));
		} else if (!this.getPassword().matches(numbers)) {
			if (errors == null)
				errors = new ActionErrors();
			errors.add("securepassword",new ActionError("newuser.securepassword"));
		} else if (!this.getPassword().matches(specialChars)) {
			if (errors == null)
				errors = new ActionErrors();
			errors.add("securepassword",new ActionError("newuser.securepassword"));
		} else if (!this.getPassword().matches(this.getConfirmPassword())) {
			if (errors == null)
				errors = new ActionErrors();
			errors.add("matchpassword", new ActionError("newuser.confirmpassword.notmatch"));
		}
		
		return errors;
	}
		
}

As per your suggestion i checked at

if (this.getPassword().trim().length() < 8) {
if (errors == null)
errors = new ActionErrors();
errors.add("securepassword",new ActionError("newuser.securepassword"));
}

I did following changes as well

else if (this.getPassword().trim().length() < 8) {
if (errors == null)
errors = new ActionErrors();
errors.add("securepassword",new ActionError("newuser.securepassword"));
}

else if (!this.getPassword().matches(upperCaseChars)) {
if (errors == null)
errors = new ActionErrors();
errors.add("securepassword",new ActionError("newuser.securepassword"));
}



but at the end it is giving following error...........




Error 500--Internal Server Error
java.lang.NullPointerException
at jsp_servlet.__newuser._jspService(__newuser.java:510)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:408)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:318)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:505)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:251)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1014)
at org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:961)
at org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:931)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:247)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:505)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:251)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1014)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:417)
at org.apache.struts.action.RequestProcessor.processActionForward(RequestProcessor.java:390)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:271)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3498)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)



Please suggest...........

Dipali

[jatan bhavsar]

Hi Dipali,

at jsp_servlet.__newuser._jspService(__newuser.java:510)

Check the generated java file for the jsp newuser. It's giving error at line 510. Now error has shifted to jsp from userform.

Search where you should look for the generated java file of jsp in tomcat .

Regards
Jatan

[Dipali yadav]

I checked all the code.........please help me out..

[jatan bhavsar]

Hi,

Can you post code for jsp and _jsp(a jsp converted to servlet) .. then i might be able to answer as error is clearly stating the line number... Again check the java class file for the jsp page.


Regards
Jatan