java web
文件— 新建- 动态web项目 - myapp
myapp - 新建html文件 - index .html
另外可从外部导入（粘贴到WebContent）myapp - 新建servlet文件 - LoginServlet .java
启动运行 绿色 run as----run on sever Index.html
Index.html
<html >
<head>
<title>登录</title>
<script language="javascript" type="">
function LoginSubmit(){
var user=document.Login.loginName.value;
var pass=document.Login.password.value;
if(user==null||user==""){
altrt("请输入用户名");
}
else if(pass==null||pass==""){
altrt("请填写密码");
}
else document.Login.submit();
}
</script>
</head>
<body>
<form method="post" name="Login" action="LoginServlet">
<p align="left">
用户名：<input type="text" name="loginName" size="20" > </p>
<p align="left">
密 码：<input type="password" name="password" size="20" > </p>
<p align="left">
<input type="button" value="提交" name="B1" onclick="LoginSubmit()">
<input type="reset" value="重置" name="B2" > </p>
</form>
</body>
</html>
LoginServlet.java
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;
/**
* Servlet implementation class LoginServlet
*/
public class LoginServlet extends HttpServlet {
public LoginServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("GBK");
response.setContentType("text/html;charset=GBK");
PrintWriter out=response.getWriter();
String pass=request.getParameter("password");
String user=request.getParameter("loginName");
if("admin".equals(user)&&"123456".equals(pass)){
out.println("登陆成功!");
}else{
out.println("登陆失败！");
}
}
}