数据的两种请求提交的方式GET和POST的区别

古城微笑少年丶 2023-05-22 22:25 1阅读 0赞

**Java Servlet**  
是运行在 Web 服务器或应用服务器上的程序，它是作为来自 Web 浏览器或其他 HTTP 客户端的请求和 HTTP 服务器上的数据库或应用程序之间的中间层。使用 Servlet，您可以收集来自网页表单的用户输入，呈现来自数据库或者其他源的记录，还可以动态创建网页。

**get方式请求提交和post方式提交**

<!DOCTYPE html>
    <html>
    <head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
    </head>
    <body>
    	<h1>Get方式提交请求</h1>
    	<form action="/LoginServlet" method="Get">
    		用户名：<input type="text" name="username" required>
    		密码：<input type="password" name="password" required>
    		<input type="submit" value="提交">
    	</form>
    	<h1>Post方式提交请求</h1>
    	<form action="/LoginServlet" method="Post">
    		用户名：<input type="text" name="username" required>
    		密码：<input type="password" name="password" required>
    		<input type="submit" value="提交">
    	</form>
    </body>
    </html>

Servlet部分代码：

package com.test.web;
    import java.io.IOException;
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse; @WebServlet("/LoginServlet") public class LoginServlet extends HttpServlet { 
    	private static final long serialVersionUID = 1L; public LoginServlet() { 
            super();
            // TODO Auto-generated constructor stub
        }
    	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
    		request.setCharacterEncoding("utf-8");
    		response.setCharacterEncoding("utf-8");
    		response.setContentType("text/html;charset=utf-8");
    		String usr=request.getParameter("username");
    		String pwd=request.getParameter("password");
    		response.getWriter().append("get方式请求：\n 用户名:"+usr+"\n 密码："+pwd);
    	}
    	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
    		request.setCharacterEncoding("utf-8");
    		response.setCharacterEncoding("utf-8");
    		response.setContentType("text/html;charset=utf-8");
    		String usr=request.getParameter("username");
    		String pwd=request.getParameter("password");
    		response.getWriter().append("post方式请求：\n 用户名:"+usr+"\n 密码："+pwd);
    	}
    }

get方式不加密，post方式加密，推荐使用post方式。