五、Servlet应用
2020-11-10 本文已影响0人
真是个点子王
1. request对象
-
在Servlet中用来处理客户端请求需要用doGet或doPost方法的request对象
1.1 get和post区别
1.2 request主要方法
1.2.1 get方法
package com.qf.servlet2;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(value = "/rs")
public class RegisterServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//1.获取用户请求发送的数据
String username = req.getParameter("username");
String password = req.getParameter("password");
System.out.println("提交的数据： " + username + "\t" + password);
}
}
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
<meta charset="UTF-8">
<title>注册页面</title>
</head>
<body>
<form action="/Webproject_war_exploded/rs" method="get">
用户名:<input type="text" name="username"/><br/>
密码：<input type="password" name="password"/><br/>
<input type="submit" value="注册"/>
</form>
</body>
</html>
1.2.2 Post方法
package com.qf.servlet2;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(value = "/rs")
public class RegisterServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//1.获取用户请求发送的数据
String username = req.getParameter("username");
String password = req.getParameter("password");
System.out.println("提交的数据： " + username + "\t" + password);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//1.获取用户请求发送的数据
String username = req.getParameter("username");
String password = req.getParameter("password");
System.out.println("提交的数据： " + username + "\t" + password);
}
}
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
<meta charset="UTF-8">
<title>注册页面</title>
</head>
<body>
<form action="/Webproject_war_exploded/rs" method="post">
用户名:<input type="text" name="username"/><br/>
密码：<input type="password" name="password"/><br/>
<input type="submit" value="注册"/>
</form>
</body>
</html>
2. response对象
-
response对象响应客户端请求并向客户端输出信息
2.1 response主要方法
