Programming for beginners: Struts2 Passing static parameters to action object

Some times there are some properties common to all action objects. In that case you can configure them in struts.xml using param element.

For example,

<param name="organization">Symantec</param>

<result name="success">/success.jsp</result>

<result name="input">/login.jsp</result>

</action>

Property organization is common to all employees, so I configured organization here.

Define model class Employee
Employee class is used to hold request parameters.

package strutstutorial.model;

public class Employee {
  private String firstName;
  private String lastName;
  private int age;
  private String password;
  private String confPassword;
  private int id;
  private String organization;

  public String getFirstName() {
    return firstName;
  }

  public void setFirstName(String firstName) {
    this.firstName = firstName;
  }

  public String getLastName() {
    return lastName;
  }

  public void setLastName(String lastName) {
    this.lastName = lastName;
  }

  public int getAge() {
    return age;
  }

  public void setAge(int age) {
    this.age = age;
  }

  public String getPassword() {
    return password;
  }

  public void setPassword(String password) {
    this.password = password;
  }

  public String getConfPassword() {
    return confPassword;
  }

  public void setConfPassword(String confPassword) {
    this.confPassword = confPassword;
  }

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getOrganization() {
    return organization;
  }

  public void setOrganization(String organization) {
    this.organization = organization;
  }

  @Override
  public String toString() {
    StringBuilder builder = new StringBuilder();
    builder.append("Employee [firstName=").append(firstName)
        .append(", lastName=").append(lastName).append(", age=")
        .append(age).append(", password=").append(password)
        .append(", confPassword=").append(confPassword).append(", id=")
        .append(id).append(", organization=").append(organization)
        .append("]");
    return builder.toString();
  }

}

Define action class
LoginAction class use Employee as model.

package strutstutorial.actions;

import strutstutorial.model.Employee;

import com.opensymphony.xwork2.ModelDriven;

public class LoginAction implements ModelDriven<Employee> {
  /* Must initialize this instance */
  private Employee employee = new Employee();

  public String execute() {
    System.out.println(employee);
    return "success";
  }

  @Override
  public Employee getModel() {
    return employee;
  }
}

Define login.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
  pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
  <s:form action="login" method="post">
    <s:textfield name="id" label="id" size="20" />
    <s:textfield name="firstName" label="First Name" size="20" />
    <s:textfield name="lastName" label="Last Name" size="20" />
    <s:password name="password" label="password" size="20" />
    <s:password name="confPassword" label="confPassword" size="20" />
    <s:textfield name="age" label="age" size="3" />

    <s:submit name="submit" label="Submit" align="center" />
  </s:form>
</body>
</html>

Define success.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
  pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
  <h1>Login successfull</h1>
</body>
</html>

Struts.xml

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
  <package name="default" extends="struts-default">
    <action name="login" class="strutstutorial.actions.LoginAction">
      <param name="organization">Symantec</param>
      <result name="success">/success.jsp</result>
      <result name="input">/login.jsp</result>
    </action>

  </package>
</struts>

web.xml

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
  <package name="default" extends="struts-default">
    <action name="login" class="strutstutorial.actions.LoginAction">
      <result name="success">/success.jsp</result>
      <result name="input">/login.jsp</result>
    </action>

  </package>
</struts>

Total project structure looks like below.

Run login.jsp and input some information, you will get employee details including organization in console.

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Programming for beginners

Saturday 24 October 2015

Struts2 Passing static parameters to action object

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