SatyaCodes

JSP- Action Tags

JSP Action Tags

The action tags are used to control the flow between pages and to use Java Bean. The Jsp action tags are given below.

JSP Action Tags Description
jsp:forward Forwards the request and response to another resource.
jsp:include Includes another resource.
jsp:param Sets the parameter value. It is used in forward and include mostly.
jsp:useBean Creates or locates bean object.
jsp:setProperty Sets the value of property in bean object.
jsp:getProperty Prints the value of property of the bean.
jsp:plugin Embeds another components such as applet.
jsp:fallback Can be used to print the message if plugin is working. It is used in jsp: plugin.

Forward, include, param example

Login.jsp
------------------------
<h2>Login Page</h2>

<jsp:include page="Success.jsp">
	<jsp:param name="uname" value="ADMIN" />
	<jsp:param name="pwd" value="admin" />
</jsp:include>


Success.jsp
------------------------
<h2>Success Page</h2>   
 Welcome, <%= request.getParameter("uname")  %>

Similarly we can use for also

UserBean Example

1.First we have choose the Input values for the Login page

<form action="set.jsp" method="post">
	Email <input type="text" name="email"><br>
	Pass  <input type="text" name="pwd"><br>
	<input type="submit" value="Login"><br>
</form>

2.We have to create UserBean class as per Input page parameters (email, pwd)

public class UserBean {
	String email;
	String pwd;
	public String getEmail() {
 return email;
	}
	public void setEmail(String email) {
 this.email = email;
	}
	public String getPwd() {
 return pwd;
	}
	public void setPwd(String pwd) {
 this.pwd = pwd;
	}
}

3.UserBean will set the values automatically by comparing property names

<jsp:useBean id="user" class="demo.UserBean">     
   <jsp:setProperty name="user" property="email"/>
    <jsp:setProperty name="user" property="pwd"/>
</jsp:useBean>

<h3>getProperty Details</h3>
<jsp:getProperty name="user" property="email" /><br>  
<jsp:getProperty name="user" property="pwd" /><br>

Here name is Object of bean class. & propery is the userbean property names

Output

getProperty Details
satyajohnny1@gmail.com
qw

jsp:plugin, jsp:fallbacks

The jsp:plugin action tag is used to embed applet in the jsp file.

<jsp:plugin  height="500" width="500"  type="applet"  code="MouseDrag.class"  />

jsp:fallback action tag is used to display some message if Applet is not loading

<jsp:fallback>
<p> Unable to start plugin </p>
</jsp:fallback>
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