Myeclipse下新建WebProject项目
程序仅实现前端传数据到后端写入数据库
前端html代码：
register.html
后端Servlet代码：
package com.jquery.register;import java.io.IOException;import java.io.PrintWriter;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class add extends HttpServlet { public void destroy() { super.destroy(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); Connection conn = null; PreparedStatement stmt = null; ResultSet rs = null; String name=request.getParameter("name"); String password=request.getParameter("password"); String drive = "com.mysql.jdbc.Driver"; System.out.println("ajax后台交互成功"); try{ Class.forName(drive); conn = DriverManager .getConnection("jdbc:mysql://localhost:3306/test?user=root&password=123"); System.out.println("数据库连接成功"); String sql="insert into user_table(name,password)"; sql+=" values(?,?)"; stmt = conn.prepareStatement(sql); stmt.setString(1,name); stmt.setString(2,password); stmt.executeUpdate(); System.out.println("success");// out.flush();// out.close(); }catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); }finally { try { //注意关闭原则：从里到外 if (rs != null) { rs.close(); } if (stmt != null) { stmt.close(); } if (conn != null) { conn.close(); } } catch (SQLException e) { e.printStackTrace(); } } } public void init() throws ServletException { // Put your code here }} 截图：
