利用servlet将数据传到数据库（基础）

最新推荐文章于 2023-07-12 20:45:00 发布

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本文介绍了一种使用Servlet将表单数据插入到MySQL数据库的方法。通过加载MySQL驱动，建立数据库连接，构造SQL语句，执行插入操作并关闭连接，实现了从前端到后端的数据流转。该过程展示了Servlet在Web应用中作为控制器的重要角色。

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利用servlet将数据传到数据库

package com.controller;
/**
 * 对某张表或某个模块的接口
 */

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;



/**
 * Servlet implementation class testController
 */
@WebServlet("/testController")
public class testController extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public testController() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
		System.out.println(request.getParameter("name"));
		
		String name=request.getParameter("name");
		
		
		if(name!=null) {
		
		try {
			//1 加载驱动
			Class.forName("com.mysql.jdbc.Driver");
			//2 连接数据库
			Connection con=DriverManager.getConnection("jdbc:mysql://10.96.126.184:3306/hd", "root", "root");
			
			//3 要执行的sql语句
			String sql="INSERT into users (uid,uname,upwd) VALUE ('1-111565687356545652','"+name+"','6666')";
			System.out.println(sql);
			//4 创建执行sql语句的对象
			Statement st = con.createStatement();
			
			//5 执行sql语句
			int temp =st.executeUpdate(sql);
			System.out.println("返回的值："+temp);
			
			//6 关闭sql对象
			st.close();
			
			//7 关闭连接
			con.close();
			
		} catch (  SQLException | ClassNotFoundException  e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		}
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

界面及运行结果：
在这里插入图片描述