Nullpointerexception while setting a bean

Question

I have an action URL after clicking a hyper link like so

/SocialStupendous/GetProfile.action?slno=3&slno=3

In my execute m

Answer 1

The bean is not initialized. You should initialize it somehow in the action

private ProfileBean bean = new ProfileBean(); 
//and add getter ans setter

the better approach, however is let the container to do it for you. You just need to create a bean configuration in the struts.xml

<bean class="com.yourpackagename.ProfileBean" scope="default"/>

then you would have

private ProfileBean bean;

@Inject
public void setProfileBean(ProfileBean bean) {
  this.bean = bean;
}

and you don't need to parse request for parameters, this is already done by the params interceptor which is a part of defaultStack that your action should run. You should create properties in your action to hold parameter values.

private Integer slno;

public Integer getSlno() {
    return slno;
}

public void setSlno(Integer uslno) {
    this.slno = slno;
}

and the action will look like

public String execute() {

   if (slno != null) {
     System.out.println(slno)
     bean.setUslno(slno);
   }

   ......
   return SUCCESS;
}