简单Servlet实例-优快云博客

本文链接：https://blog.youkuaiyun.com/wicycc/article/details/41441975

  <servlet>
  	<servlet-name>HelloWorldServlet</servlet-name>
  	<servlet-class>com.ruanku.web.HelloWorldServlet</servlet-class>
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>HelloWorldServlet</servlet-name>
  	<url-pattern>/HelloWorld</url-pattern>
  </servlet-mapping>

配置映射 mapping 映射里面servlet-name要匹配servlet里面的 servlet-name

url-pattern 设置地址栏 http://localhost:8080/chap05/HelloWorld 就能跳转到HelloWorldServlet.java文件里面的内容

重写doGet 和doPost方法在doget方法里面使用this.doPost

response.setCharacterEncoding("gbk");

设置解码，如果不设置中文会乱码

out.close();

用完关闭

package com.ruanku.web;

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

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloWorldServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

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

	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setCharacterEncoding("gbk");
		PrintWriter out=response.getWriter();
		out.println("<html>");
		out.println("<head><title>问候大爷</title></head>");
		out.println("Servlet大爷你好！");
		out.println("</html>");
		out.close();
	}

	
}

这便是一个最简单的servlet