Sun 刚公布了NetBeans6.8与GlassfishV三和JEE六

Sun 刚公布了NetBeans6.8与GlassfishV三和JEE六，我急不可耐地下载安装，并进行了容易的测试；有了JEE器皿，有了开发工具，我们就开展JEE六体味之旅吧！
Servlet3.0轨范——JSR 315（Java Specification Request）。其高级目标包括可插拔web构架、EoD（ease of development——便于开发）特性、支持异步和Comet、保险、与其说他轨范组合、以及其它各项改善。注脚@WebServlet、@@WebFilter、@WebListener诀别对应Servlet、过滤器、与Servlet侦听。
1、新建JEE6项目
打开Netbeans6.8，抉择“新建项目”—>“java web”—>“web 应用程序”其后下一步:

在项目名称处输入“JEE六Test”下一步：

服务器：抉择“GlassFishV三”，Java EE 版本：抉择“Java EE WEB”点击完成则建立一个项目名称是：“JEE六Test” WEB项目。
2、Servlet体会
新建包com.servlet，把测试的代码都放在这个索引中，其后在com.servlet包上单击右键; 抉择“新建”—>“servlet”如次图：

输入姓名“TestServlet”点击完成，去掉诠释代码后如次：

Java代码
一.package com.servlet;
2.
三.import java.io.IOException;
四.import java.io.PrintWriter;
五.import javax.servlet.ServletException;
六.import javax.servlet.annotation.WebServlet;
七.import javax.servlet.http.HttpServlet;
八.import javax.servlet.http.HttpServletRequest;
九.import javax.servlet.http.HttpServletResponse;
10.
11.@WebServlet(name="TestServlet", urlPatterns={"/TestServlet"})
12.public class TestServlet extends HttpServlet {
13.
14.
15. protected void processRequest(HttpServletRequest request, HttpServletResponse response)
16. throws ServletException, IOException {
17. response.setContentType("text/html;charset=UTF-八");
18. PrintWriter out = response.getWriter();
19. try {
20. out.println("");
21. out.println("");
22. out.println("");
23. out.println("");
24. out.println("");
25. out.println("Servlet TestServlet at " + request.getContextPath () + "");
26. out.println("");
27. out.println("");
28.
29. } finally {
30. out.close();
31. }
32. }
33.
34.
35. @Override
36. protected void doGet(HttpServletRequest request, HttpServletResponse response)
37. throws ServletException, IOException {
38. processRequest(request, response);
39. }
40.
41.
42. @Override
43. protected void doPost(HttpServletRequest request, HttpServletResponse response)
44. throws ServletException, IOException {
45. processRequest(request, response);
46. }
47.
48.
49. @Override
50. public String getServletInfo() {
51. return "Short description";
52. }//
53.
54.}
package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(name="TestServlet", urlPatterns={"/TestServlet"})
public class TestServlet extends HttpServlet {

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-八");
PrintWriter out = response.getWriter();
try {
out.println("");
out.println("");
out.println("");
out.println("");
out.println("");
out.println("Servlet TestServlet at " + request.getContextPath () + "");
out.println("");
out.println("");

} finally {
out.close();
}
}

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}

@Override
public String getServletInfo() {
return "Short description";
}//

}
选中TestServlet.java点击右键，取舍运作则可以瞥Servlet TestServlet at /JEE六TEst页面。真是简略！@WebServlet(name="TestServlet", urlPatterns={"/TestServlet"})解决了一切问题。Name=”TestServlet”是定义了Servlet姓名是TestServlet，urlPatterns=={"/TestServlet"}定义了Servlet访问的URL途径；在浏览器输入http://localhost:8080/JEE六Test/TestServlet就可以看到成效了。
3、体会过滤器(Filter)
取舍com.servlet单击右键，抉择“WEB”—》“过滤器”下一步，在对话框中输入“TestFilter”点击完成。

在新建过滤器配备过滤器调度对话框中“新建”在 URL框中输入 “/*”确定，其后完成。

则生成如次代码：

Java代码
一.package com.servlet;
2.
三.import java.io.IOException;
四.import javax.servlet.Filter;
五.import javax.servlet.FilterChain;
六.import javax.servlet.FilterConfig;
七.import javax.servlet.ServletException;
八.import javax.servlet.ServletRequest;
九.import javax.servlet.ServletResponse;
十.import javax.servlet.annotation.WebFilter;
11.
12.@WebFilter(filterName = "TestFilter", urlPatterns = {"/*"})
13.public class TestFilter implements Filter {
14.
15. public void init(FilterConfig filterConfig) throws ServletException {
16. throw new UnsupportedOperationException("Not supported yet.");
17. }
18.
19. public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
20. request.setCharacterEncoding("UTF-八");
21. chain.doFilter(request, response);
22. }
23.
24. public void destroy() {
25. throw new UnsupportedOperationException("Not supported yet.");
26. }
27.}
package com.servlet;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;

@WebFilter(filterName = "TestFilter", urlPatterns = {"/*"})
public class TestFilter implements Filter {

public void init(FilterConfig filterConfig) throws ServletException {
throw new UnsupportedOperationException("Not supported yet.");
}

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
request.setCharacterEncoding("UTF-八");
chain.doFilter(request, response);
}

public void destroy() {
throw new UnsupportedOperationException("Not supported yet.");
}
}
一个注脚：@WebFilter(filterName = "TestFilter", urlPatterns = {"/*"})完成了过滤器的配备。姓名是TestFilter，对/*全部的访问都过滤；效能是设立编码是UTF-8格式。
4、感受Listener
在com.servlet包姓名上单击右键，抉择新建抉择:“WEB-WEB应用程序侦听程序”如次图：

点击下一步在姓名中输入：“TestServletListener”则生成以次代码：

Java代码
一.package com.servlet;
2.
三.import javax.servlet.annotation.WebListener;
四.import javax.servlet.http.HttpSessionEvent;
五.import javax.servlet.http.HttpSessionListener;
6.
7.@WebListener()
八.public class TestServletListener implements HttpSessionListener {
9.
10. public void sessionCreated(HttpSessionEvent se) {
11. System.out.println("Session Created");
12. }
13.
14. public void sessionDestroyed(HttpSessionEvent se) {
15. System.out.println("sessionDestroyed");
16. }
17.}
package com.servlet;

import javax.servlet.annotation.WebListener;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

@WebListener()
public class TestServletListener implements HttpSessionListener {

public void sessionCreated(HttpSessionEvent se) {
System.out.println("Session Created");
}

public void sessionDestroyed(HttpSessionEvent se) {
System.out.println("sessionDestroyed");
}
}
又是一个诠注@WebListener()完成了配备，起步服务器，侦听已经见效了。
呵呵。。。。。。容易吗！开发效率高吧！真是一个爽！
下一节我们体会EJB3.1.
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