实证验明Servlet生命周期
实验证明Servlet生命周期
根据上过一篇日志的内容，测试Servlet生命周期内各个函数的执行顺序。
后台打印结果如下：
测试代码：
我觉得你可以理解为对这个函数的修饰符。
根据上过一篇日志的内容，测试Servlet生命周期内各个函数的执行顺序。
后台打印结果如下：
信息: Server startup in 1078 ms postConstruct! init! get! 2011-1-10 17:16:21 org.apache.coyote.http11.Http11Protocol pause 信息: Pausing Coyote HTTP/1.1 on http-8080 2011-1-10 17:16:22 org.apache.catalina.core.StandardService stop 信息: Stopping service Catalina destory! preDestory! 2011-1-10 17:16:22 org.apache.coyote.http11.Http11Protocol destroy 信息: Stopping Coyote HTTP/1.1 on http-8080
测试代码：
import java.io.IOException;
import java.io.PrintWriter;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class testSequence extends HttpServlet {
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
//super.destroy(); // Just puts "destroy" string in log
// Put your code here
System.out.println("destory!");
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
System.out.println("get!");
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
System.out.println("post!");
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
System.out.println("init!");
}
public @PostConstruct void printAline(){
System.out.println("postConstruct!");
}
public @PreDestroy void printSecondLine(){
System.out.println("preDestory!");
}
}
1 楼
uule
2011-01-15
哥们，这是什么东东？@PostConstruct
2 楼
BabyDuncan
2011-01-15
uule 写道
哥们，这是什么东东？@PostConstruct
我觉得你可以理解为对这个函数的修饰符。