初始化servletConfig

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本文介绍了一个使用@WebServlet注解实现的ServletConfig示例，通过该示例可以了解如何在Servlet中初始化参数并获取这些参数的值。

package servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
/**
 * ServletConfig  利用@WebServlet封装servletConfig数据，初始化servlet
 * @author BrightSt
 *
 */
@WebServlet(name="ServletConfigDemoServlet",
			urlPatterns={"/ServletConfigDemo"},
			initParams={
					@WebInitParam(name="admin",value="Harry Taciak"),
					@WebInitParam(name="email",value="admin@example.com")
}	)
public class ServletConfigDemoServlet implements Servlet{
	 private transient ServletConfig servletConfig;
	 
	public void destroy() {
		
	}

	public ServletConfig getServletConfig() {
		
		return this.servletConfig;
	}

	public String getServletInfo() {
	
		return "Servlet Demo";
	}

	public void init(ServletConfig servletConfig) throws ServletException {
		this.servletConfig=servletConfig;
		
	}

	public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
		ServletConfig servletConfig = getServletConfig();
		String admin = servletConfig.getInitParameter("admin");
		String email = servletConfig.getInitParameter("email");
		response.setContentType("text/html");
		PrintWriter writer = response.getWriter();
		writer.print("<html><head></head><body>"
				+ "admin:"+admin
				+ "<br/>email:"+email
				+ "<br/></body>"
				+ "</html>");
	}

}