<form action="xxx.jsp"/>
<input type="submit" value="添加用户"/>
</form>
2:添加mysql的jdbc驱动jar包
3：编写一个数据库 *** 作辅助类,使用的sql语句，差不多如下
insert into tb_user values(?,?,?)等，你写的太简单，详细点的要求可以发邮件到[email protected]，我会帮你完成哦
index.jsp页面：<%@ page language="java" contentType="text/htmlcharset=GB2312"%>
<html>
<head>
<title>登录页面</title>
</head>
<body>
<!-- 提交请求参数的表单 -->
<form action="login" method="post">
<table align="center">
<caption><h3>用户登录</h3></caption>
<tr>
<!-- 用户名的表单域 -->
<td>用户名：<input type="text" name="username"/></td>
</tr>
<tr>
<!-- 密码的表单域 -->
<td>密 码：<input type="password" name="password"/></td>
</tr>
<tr align="center">
<td colspan="2"><input type="submit" value="登录"/><input type="reset" value="重填" /></td>
</tr>
</table>
</form>
</body>
</html>
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 Test 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 {
response.setContentType("text/htmlcharset=gb2312")
PrintWriter out = response.getWriter()
String name=request.getParameter("username")
String psw=request.getParameter("password")
if(name.trim().equals("")||psw.trim().equals(""))
out.println("你输入的用户名或密码为空")
else
out.println("用户 "+name+",你好！<br>你输入的密码为："+psw)
}
}
web.xml配置文件：
<?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>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>Test</servlet-name>
<servlet-class>Test</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Test</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
在servlet里面用request.setAttribute("mes",yourMessage)
request.getRequestDispatcher("YourJspURL").forward(request, response)
然后在相应jsp里面获取属性输出:
<%=request.getAttribute("mes")%>
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