package com.test.servlet;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 HelloWorld extends HttpServlet{ @Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
resp.setContentType("test/html");

PrintWriter out = resp.getWriter();

out.println("<html><head><title>Hello World Sample</title></head>");

out.println("<body><h1>Hello World:</h1></body></html>");

out.flush();
}
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>Hello</servlet-name>
<servlet-class>com.test.servlet.HelloWorld</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>Hello</servlet-name>
<url-pattern>/Hello</url-pattern>
</servlet-mapping>
</web-app>

解决方案 »

  1.   

    弹出问你是打开?还是保存是吧。
    知道为什么?
     PrintWriter out = resp.getWriter();
            
            out.println("<html><head><title>Hello World Sample</title></head>");
            
            out.println("<body><h1>Hello World:</h1></body></html>");
            
            out.flush();这像相当于是什么? 相当于往客户端写东西,就像做文件下载一样。。你应该加上request.getRequestDispatcher("/index.jsp").foward(req,resp);
    也就是说,你要跳转到一个界面去,知道么
      

  2.   

    楼上说错了,是这里写错了
    改成
    resp.setContentType("text/html");