Servlet实操

myeclipse 中new Servlet: package名字com.hw.controller name StudentServlet(com.hw.entity中Student) 去掉URL的/servlet

(loginservlet中 action="StudentServlet")

（<script type="text/javascript">function go(){if(kk.name.value==""){//表单名.文框名.value

alert("姓名不能为空！！！")}else if(kk.pwd.value==""){alert("密码不能为空！！！")}else{

kk.submit();//表单名.submit() 即为提交}}</script></head>

姓名：<input type="text" name="name"><br>

密码：<input type="password" name="pwd"><br>

爱好：<input type="checkbox" name="love" value="唱歌">唱歌跳舞武术跑步踢足球

<input type="button" value="登录" onclick="go()"></form></body>）

直接浏览器开默认是doget()

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletContext;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

public class StudentServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

doPost(request, response);

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// servlet解决乱码

request.setCharacterEncoding("utf-8");// 设置请求编码

response.setCharacterEncoding("utf-8");// 设置响应编码

response.setContentType("text/html;charset=utf-8");// 设置响应编码类型

String name = request.getParameter("name");// 取姓名

String pwd = request.getParameter("pwd");// 取姓名

String[] ss = request.getParameterValues("love");

if (name.equals("qq") && pwd.equals("123")) {

request.setAttribute("name", name);

// servlet中使用session

HttpSession session = request.getSession();

session.setAttribute("name", name);

response.sendRedirect("admin.jsp");

} else {

String love = "";

for (int i = 0; i < ss.length; i++) {

love += ss[i] + ",";

}

// servlet中使用out

PrintWriter out = response.getWriter();

out.println("你的爱号太多了：" + love.substring(0,love.length()-1));

}

重启服务器

Servlet实操

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