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创建Servlet
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下图为Idea自动生成
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写业务代码
package com.ljysty.servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class Servlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("doPost()....被调用");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("doGet()....被调用");
}
}
- 以下是idea在web.xml中自动生成的代码
<!--以下4行是idea自动生成的-->
<servlet>
<servlet-name>Servlet</servlet-name>
<servlet-class>com.ljysty.servlet.Servlet</servlet-class>
</servlet>
<!--以下四行是需要自己对url进行配置的-->
<servlet-mapping>
<servlet-name>Servlet</servlet-name>
<url-pattern>/Servlet</url-pattern>
</servlet-mapping>
- 启动项目 运行结果
- 注册表单代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>注册</title>
</head>
<body>
<h1>注册用户</h1>
<form action="http://localhost:8080/servlet_helloServlet/Servlet" method="POST">
user: <input type="text" name="username"><br><br>
<input type="submit" value="注册用户">
</form>
</body>
</html>
- 打开该页面点击注册 运行结果
