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HelloServlet.java
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94 lines (83 loc) · 2.72 KB
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package com.hello.firstweb;
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 HelloServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public HelloServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* 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.setCharacterEncoding("UTF-8");//设置request和response编码，两个都要注意
request.setCharacterEncoding("UTF-8");
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("<meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">");
out.println("<HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
//input
String requestURI=request.getRequestURI();//获取URI路径
out.println("<form action='"+requestURI+"' method='post'>");
out.println("请输入名字：<input type='text' name='name' />");
out.println("<input type='submit' />");
out.println("</form>");
out.println("");
//得到name
String name=request.getParameter("name");
System.out.println(name);
if(name!=null && name.trim().length()>0){
out.println("您好,<b>"+name+"</b>. 欢迎来到java世界.");
}
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* 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 {
this.doGet(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}