JSP
Java Server Pages
Maven example
- cd /tmp
- mkdir jspExample
- cd jspExample
- nano pom.xml
1 <project>
2 <modelVersion>4.0.0</modelVersion>
3 <groupId>test</groupId>
4 <artifactId>dummy</artifactId>
5 <version>1.0</version>
6 <packaging>war</packaging>
7 <dependencies>
8 <dependency>
9 <groupId>javax</groupId>
10 <artifactId>javaee-web-api</artifactId>
11 <version>6.0</version>
12 <scope>provided</scope>
13 </dependency>
14 </dependencies>
15 </project>
- mkdir -p src/main/webapp/WEB-INF
- nano src/main/webapp/WEB-INF/web.xml
1 <web></web>
- nano src/main/webapp/index.jsp
1 <%@page import="org.allowed.bitarus.Handler" %>
2 <jsp:useBean id="test" class="org.allowed.bitarus.TestBean" />
3 <% //Handler h = new Handler(request,response,out); %>
4 <% Handler h = new Handler(pageContext); %>
5 <html>
6 <body>
7 <p>Hello</p>
8 <p>World <jsp:getProperty name="test" property="name" /> </p>
9 <% h.writeHandler(); %>
10 <h2><% out.print("Your IP address is " + request.getRemoteAddr()); %></h2>
11 <h3><% h.writeIP(); %></h3>
12 </body>
13 </html>
- mkdir -p src/main/java/org/allowed/bitarus
- nano src/main/java/org/allowed/bitarus/TestBean.java
1 /*
2 mkdir -p src/main/java/org/allowed/bitarus
3 kate src/main/java/org/allowed/bitarus/TestBean.java
4 */
5 package org.allowed.bitarus;
6 import java.util.logging.Logger;
7 import java.util.logging.Level;
8
9 public class TestBean{
10 private String name;
11 private Logger logger;
12
13 public TestBean(){
14 this.logger = Logger.getLogger(this.getClass().getName() );
15 this.logger.log(Level.INFO,"Created test bean");
16 this.name="Ioooo";
17 }
18
19 public String getName(){
20 this.logger.info("getName called");
21 return this.name;
22 }
23
24 public void setName(String name){
25 this.name=name;
26 }
27 }
- nano src/main/java/org/allowed/bitarus/Handler.java
1 package org.allowed.bitarus;
2
3 import java.util.logging.Logger;
4 import java.util.logging.Level;
5 import javax.servlet.ServletRequest;
6 import javax.servlet.ServletResponse;
7 import javax.servlet.jsp.JspWriter;
8 import javax.servlet.jsp.PageContext;
9
10 /*
11 mkdir -p src/main/java/org/allowed/bitarus
12 http://localhost:8081/dummy-1.0/index.jsp?user=TestASD
13 */
14 public class Handler{
15 private ServletRequest request;
16 private ServletResponse response;
17 private JspWriter out;
18
19 public Handler(ServletRequest request, ServletResponse response,JspWriter out){
20 this.request = request;
21 this.response = response;
22 this.out = out;
23 }
24
25 public Handler(PageContext pageContext){
26 this.request = pageContext.getRequest();
27 this.response = pageContext.getResponse();
28 this.out = (JspWriter) pageContext.getAttribute(pageContext.OUT) ;
29 }
30
31 public void writeHandler(){
32 try{
33 this.out.println(String.format("<p>Handler up %s</p>" , this.request.getParameter("user") ));
34 }
35 catch(Exception ex){
36 }
37 }
38
39 public void writeIP(){
40 try{
41 this.out.print("!!! Your IP address is " + this.request.getRemoteAddr());
42 }
43 catch(Exception ex){
44 }
45 }
46
47 }
ab -n 100 -c 100 http://localhost:8081/dummy-1.0/index.jsp?user=TestASD