JSP Example:Scriptless

Going straight from the request to the JSP without going through a servlet...

Case1: Using param Attribute

STEP1: Create a “dynamic web” project named “FirstBean”.

STEP 2: Create a new package named” com.examp” under Src or Source Folder.

STEP 3: Create a new html file named “SampleHtml.html” under WebContent folder.

< html >

< head >

< title >Entry Page< /title >

< /head >

< body >

< form action="TestBean.jsp" >

name: < input type="text" name="Username" >

ID#: < input type="text" name="UserID" >

< input type="submit" >

< /form >

< /body >

< /html >

STEP 4: Create a new java class named “Person.java” under Src folder.

package com.examp;

public abstract class Person {

private String name;

public void setName(String name) {

this.name=name;

}

public String getName() {

return name;

}}

STEP 5: Create a new java class named “Employee.java” under Src folder.

package com.examp;

public class Employee extends Person {

private int empID;

public void setEmpID(int empID) {

this.empID = empID;

}

public int getEmpID() {

return empID;

} }

STEP 6: Create a new JSP file named “TestBean.jsp” under WebContent folder.

< body  >

< jsp:useBean id="person" type="com.examp.Person" class="com.examp.Employee" >

< jsp:setProperty name="person" property="name" param="Username" / >

< jsp:setProperty name="person" property="empID" param="UserID" / >

< /jsp:useBean >

Person is:

< jsp:getProperty name="person" property="name" / >

ID is :

< jsp:getProperty name="person" property="empID" / >

< /body >

STEP7: Include below code in a Xml file “web.xml” under WEB-INF folder.

< welcome-file-list >

< welcome-file >SampleHtml.html< /welcome-file >

< welcome-file >TestBean.jsp< /welcome-file >

< /welcome-file-list >

STEP 8 Export the project” FirstBean” into a war file named ” FirstBean.war” and place it in the deploy folder of JBOSS server.

STEP 9:To see the output use this url ” http://localhost:8080/ FirstBean / SampleHtml.html ” where FirstBean is the .war file name and SampleHtml.html is specified in the of web.xmlfile.

Step 10: Sample output is

Person is: Ammu ID is : 1

Bean tags convert primitive properties automatically

 

Case2 :With out using param attribute

We need to do following modifications

1: SampleHtml.html:-change the entire request parameter names match the bean property names.

< body >

< form action="TestBean.jsp" >

name: < input type="text" name="name" >

ID#: < input type="text" name="empID" >

< input type="submit" >

< /form >

< /body >

2: TestBean.jsp:-Modify the type as Employee instead of Person

< body >

< jsp:useBean id="person" type="com.examp.Employee" class="com.examp.Employee" >

< jsp:setProperty name="person" property="*" / >

< /jsp:useBean >

Person is:

< jsp:getProperty name="person" property="name" / >

ID is :

< jsp:getProperty name="person" property="empID" / >

< /body >