//Base concept of jsp
<%@ page language="java" %>
<html>
<head>
<title>JavaServer Page Lifecycle</title>
</head>
<body bgcolor="#FFFFFF">
<h1>To illustrate JavaServer Page lifecycle</h1>
<p>Look at your server console for System.out.println() output.</p>
</body>
</html>
<%!
public void init() {
// Illegal?
System.out.println("Actually OK to override GenericServlet's init() convenience method");
}
public void jspInit() {
try {
throw new Exception();
} catch (Exception e) {
StackTraceElement[] st = e.getStackTrace();
System.out.println(st[0]);
}
// Show inheritance hierarchy and implementing interfaces
Class c = this.getClass();
System.out.println("\nClass " + c.getName());
while ((c = c.getSuperclass()) != null) {
System.out.println("subclass of " + c.getName());
Class[] ifaces = c.getInterfaces();
for (int i = 0; i < ifaces.length; i++) {
if (i == 0) {
System.out.print(" which implements interfaces: "
+ ifaces[0]);
} else {
System.out.print(", " + ifaces[i].getName());
}
}
System.out.println();
}
}
public void jspDestroy() {
try {
throw new Exception();
} catch (Exception e) {
StackTraceElement[] st = e.getStackTrace();
System.out.println(st[0]);
}
}
%>
<%
// The scriptlet code below finds its way into the _jspService() method
try {
throw new Exception();
} catch (Exception e) {
StackTraceElement[] st = e.getStackTrace();
System.out.println(st[0]);
}
%>
//explanation of scriplets,expressions and declarations in jsp
<%!
private String convert(int miles) {
java.text.DecimalFormat formatter = new java.text.DecimalFormat("###.##");
String value = formatter.format(1.6 * miles);
return value;
}
%>
<%
int[] mileValues = {1,2,3,5,10,15,20,50,100,200,500};
%>
<html>
<head><title>Miles to Kilometers</title></head>
<body>
<table border="1">
<tr>
<th><b>Miles</b></th>
<th><b>Kilometers</b></th>
</tr>
<% for (int i = 0; i < mileValues.length; i++) { %>
<tr>
<td><%=mileValues[i]%></td>
<td><%=convert(mileValues[i])%></td>
</tr>
<% } %>
</table>
</body>
</html>
Output:-
<%@ page language="java" %>
<html>
<head>
<title>JavaServer Page Lifecycle</title>
</head>
<body bgcolor="#FFFFFF">
<h1>To illustrate JavaServer Page lifecycle</h1>
<p>Look at your server console for System.out.println() output.</p>
</body>
</html>
<%!
public void init() {
// Illegal?
System.out.println("Actually OK to override GenericServlet's init() convenience method");
}
public void jspInit() {
try {
throw new Exception();
} catch (Exception e) {
StackTraceElement[] st = e.getStackTrace();
System.out.println(st[0]);
}
// Show inheritance hierarchy and implementing interfaces
Class c = this.getClass();
System.out.println("\nClass " + c.getName());
while ((c = c.getSuperclass()) != null) {
System.out.println("subclass of " + c.getName());
Class[] ifaces = c.getInterfaces();
for (int i = 0; i < ifaces.length; i++) {
if (i == 0) {
System.out.print(" which implements interfaces: "
+ ifaces[0]);
} else {
System.out.print(", " + ifaces[i].getName());
}
}
System.out.println();
}
}
public void jspDestroy() {
try {
throw new Exception();
} catch (Exception e) {
StackTraceElement[] st = e.getStackTrace();
System.out.println(st[0]);
}
}
%>
<%
// The scriptlet code below finds its way into the _jspService() method
try {
throw new Exception();
} catch (Exception e) {
StackTraceElement[] st = e.getStackTrace();
System.out.println(st[0]);
}
%>
//explanation of scriplets,expressions and declarations in jsp
<%!
private String convert(int miles) {
java.text.DecimalFormat formatter = new java.text.DecimalFormat("###.##");
String value = formatter.format(1.6 * miles);
return value;
}
%>
<%
int[] mileValues = {1,2,3,5,10,15,20,50,100,200,500};
%>
<html>
<head><title>Miles to Kilometers</title></head>
<body>
<table border="1">
<tr>
<th><b>Miles</b></th>
<th><b>Kilometers</b></th>
</tr>
<% for (int i = 0; i < mileValues.length; i++) { %>
<tr>
<td><%=mileValues[i]%></td>
<td><%=convert(mileValues[i])%></td>
</tr>
<% } %>
</table>
</body>
</html>
Output:-
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