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BabyDuncan
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实验证明Servlet生命周期

ServletApacheHTML 
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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!");
	}
}
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| Servlet生命周期的简单描述
评论
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。
1 楼 uule 2011-01-15  
哥们，这是什么东东？@PostConstruct
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