test4.java

来自「JSP工程应用与项目实践」· Java 代码 · 共 44 行

package com.proser;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Test4 extends HttpServlet{
	private String param;
	private ServletContext context;
	private ServletConfig config;
	private Enumeration init;
	private PrintWriter out;
	public void doPost(HttpServletRequest request,HttpServletResponse response)
				throws IOException{
		request.setCharacterEncoding("GB2312");
		response.setContentType("text/html; charset=gb2312");
		out=response.getWriter();
		context=this.getServletContext();
		out.println("获取了工程的相对路径："+context.getRealPath("/")+"<br>");
		out.println("获取了Tomcat的信息："+context.getServerInfo()+"<br>");
		out.println("获取了JNDI："+context.getResource("/")+"<br>");
		out.println("获取了源程序的相对路径："+context.getResourcePaths("/")+"<br>");
		
		config = this.getServletConfig();
		init=config.getInitParameterNames();
		while(init.hasMoreElements()){
			param=(String)init.nextElement();
			out.println("初始化变量: "+param+"<br>");
			out.println("初始化变量所对的值："+param+"="+config.getInitParameter(param)+"<br>");
		}
		
	}
	public void doGet(HttpServletRequest request,HttpServletResponse response)
				throws IOException{
		doPost(request,response);
	}
}