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.
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< 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 >
This post first appeared on Every Day Of Your Life Is A Page Of Your History, please read the originial post: here
