I wrote code for multiple submit buttons of one form in one Action class by
using java bean. But when I was running the application first time its
working fine After that I am getting NullPointerException . Please Help me.
Here is My code.
*Exception:*
*!st time running.*
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
We are in add
calling bean getterinfo.struts2.pinfo.PInfoDTO@16ea269
add
*2nd time running*
we are in edit
calling bean getternull
edit
java.lang.NullPointerException
at info.struts2.pinfo.DAO.edit(DAO.java:37)
at info.struts2.pinfo.PInfoBean.editOperation(PInfoBean.java:23)
at
info.struts2.pinfo.PersonalInfoAction.edit(PersonalInfoAction.java:103)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:446)
at
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:285)
at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
//PersonalInfoAction.java
package info.struts2.pinfo;
import sun.security.action.GetBooleanAction;
import com.opensymphony.xwork2.ActionSupport;
public class PersonalInfoAction extends ActionSupport {
private static PInfoDTO bean;
public PInfoDTO getBean() {
System.out.println("calling bean getter"+bean);
return bean;
}
public void setBean(PInfoDTO bean) {
this.bean = bean;
}
/*private String name;
private String city;
private String street;
private String district;
private String country;
private String pincode;
private String pno;
private String mno;
private String email;
private PInfoDTO pdto=new PInfoDTO();
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
pdto.setName(name);
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
pdto.setCity(city);
}
public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
pdto.setStreet(street);
}
public String getDistrict() {
return district;
}
public void setDistrict(String district) {
this.district = district;
pdto.setDistrict(district);
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
pdto.setCountry(country);
}
public String getPincode() {
return pincode;
}
public void setPincode(String pincode) {
this.pincode = pincode;
pdto.setPincode(pincode);
}
public String getPno() {
return pno;
}
public void setPno(String pno) {
this.pno = pno;
pdto.setPno(pno);
}
public String getMno() {
return mno;
}
public void setMno(String mno) {
this.mno = mno;
pdto.setMno(mno);
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
pdto.setEmail(email);
}*/
public String add() {
System.out.println("We are in add");
PInfoBean.addOperation(this.getBean());
return "success";
}
public String edit(){
System.out.println("we are in edit");
PInfoBean.editOperation(this.getBean());
return "success";
}
public String delete(){
System.out.println("we are in delete");
PInfoBean.deleteOperation(this.getBean());
return "success";
}
public String execute(){
return "success";
}
/*public void validate(){
//System.out.println(getPdto().getName());
if(getName()==null || getName().equals("")){
addFieldError("name", getText("required.name"));
}
if(getCity()==null || getCity().equals("")){
addFieldError("city", getText("required.city"));
}
if(getDistrict()==null || getDistrict().equals("")){
addFieldError("district", getText("required.district"));
}
if(getStreet()==null || getStreet().equals("")){
addFieldError("street", getText("required.street"));
}
if(getCountry()==null || getCountry().equals("")){
addFieldError("country", getText("required.country"));
}
}
*/
}
And My java Bean Code is
//PInfoDTO.java
package info.struts2.pinfo;
public class PInfoDTO {
private String name;
private String city;
private String street;
private String district;
private String country;
private String pincode;
private String pno;
private String mno;
private String email;
private String add;
private String edit;
private String delete;
public String getAdd() {
return add;
}
public void setAdd(String add) {
this.add = add;
}
public String getEdit() {
return edit;
}
public void setEdit(String edit) {
this.edit = edit;
}
public String getDelete() {
return delete;
}
public void setDelete(String delete) {
this.delete = delete;
}
public String getName() {
System.out.println("calling getName"+name);
return name;
}
public void setName(String name) {
System.out.println("calling setName"+name);
this.name = name;
}
public String getCity() {
return city;
}
public void setCity(String city) {
System.out.println("calling setCity"+city);
this.city = city;
}
public String getStreet() {
return street;
}
public void setStreet(String street) {
System.out.println("calling setStreet"+street);
this.street = street;
}
public String getDistrict() {
return district;
}
public void setDistrict(String district) {
System.out.println("calling setDistrict"+district);
this.district = district;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
System.out.println("calling setCountry"+country);
this.country = country;
}
public String getPincode() {
return pincode;
}
public void setPincode(String pincode) {
System.out.println("calling setPincode"+pincode);
this.pincode = pincode;
}
public String getPno() {
return pno;
}
public void setPno(String pno) {
System.out.println("calling setPno"+pno);
this.pno = pno;
}
public String getMno() {
return mno;
}
public void setMno(String mno) {
System.out.println("calling setMno"+mno);
this.mno = mno;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
System.out.println("calling setEmail"+email);
this.email = email;
}
}
//pinfo1.jsp
<%@ taglib uri="/struts-tags" prefix="s"%>
<s:form action="pinfo" >
<s:textfield label="Name" name="bean.name"/>
<s:textfield label="City" name="bean.city"/>
<s:textfield label="District" name="bean.district" />
<s:textfield label="Street" name="bean.street" />
<s:textfield label="Country" name="bean.country" />
<s:textfield label="Pincode" name="bean.pincode" />
<s:textfield label="Phno" name="bean.pno" />
<s:textfield label="Mobile No" name="bean.mno" />
<s:textfield label="Email" name="bean.email" />
<s:submit action="pinfoAdd" key="lbl.add" theme="simple" />
<s:submit action="pinfoEdit" key="lbl.edit" theme="simple" />
<s:submit action="pinfoDelete" key="lbl.delete" theme="simple" />
</s:form>
//struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.custom.i18n.resources" value="ApplicationResources"
/>
<package name="default" extends="struts-default">
<action name="pinfo" method="execute"
class="info.struts2.pinfo.PersonalInfoAction">
<result name="success">pinfo.jsp</result>
<result name="input">pinfo.jsp</result>
</action>
<action name="pinfoAdd" method="add"
class="info.struts2.pinfo.PersonalInfoAction">
<result name="success">pinfo.jsp</result>
<result name="input">pinfo.jsp</result>
</action>
<action name="pinfoEdit" method="edit"
class="info.struts2.pinfo.PersonalInfoAction">
<result name="success">pinfo.jsp</result>
<result name="input">pinfo.jsp</result>
</action>
<action name="pinfoDelete" method="delete"
class="info.struts2.pinfo.PersonalInfoAction">
<result name="success">pinfo.jsp</result>
<result name="input">pinfo.jsp</result>
</action>
</package>
</struts>
How to resolve this problem please help me.
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