一个简单的从web页面获取数据插入数据库的小程序
Posted hl若水
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1.数据库新建一张表：Student_information，表中三个字段，name(nvarchar(50),null),sex(nvarchar(50),null),age(numeric(18,0),null)
2.先新建一个Main.jsp.
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <form action ="EmployeServlet" method="post"> <h1 align ="center" id ="biaotou">增加学生信息</h1> <table align="center"> <tr> <td>姓名:<td> <td><input type="text" name="emplyname" value=""/></td> <tr> <tr> <td>性别:</td> <td><input type="radio" name="sex" value="男">男 <input type="radio" name="sex" value="女">女 </td> </tr> <tr> <td>年龄:<td> <td><input type="text" name="age" value=""/></td> <tr> <tr> <td><td> <td><button type="submit" value="submit">提交</button></td> <tr> </table> </form> </body> </html>
3.新建一个Employ类，存放学生属性
package testjsp;
public class Employ {
private String name;
private String sex;
private int age;
public void setName(String name){
this.name=name;
}
public String getName(){
return this.name;
}
public void setSex(String sex){
this.sex=sex;
}
public String getSex(){
return this.sex;
}
public void setAge(int age){
this.age=age;
}
public int getAge(){
return this.age;
}
}
4.新建一个TestJsp类，获取数据，连接数据库，插入数据
package testjsp; import java.io.IOException; import java.sql.Connection; import java.sql.Driver; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.SQLException; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import test.EmployeServlet; public class TestJsp { public boolean addEmploy(Employ ee){ System.out.println(ee.getName()); System.out.println(ee.getSex()); System.out.println(ee.getAge()); String a=ee.getName(); String b=ee.getSex(); int c=ee.getAge(); System.out.println(a+b+c); String URL="jdbc:sqlserver://localhost:1433;DatabaseName=TEST_CAL"; String USER="sa"; String PASSWORD="XXXXXX"; Connection conn=null; PreparedStatement pstmt=null; try{ //加载驱动程序 Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); //获得数据库连接 conn=(Connection)DriverManager.getConnection(URL,USER,PASSWORD); System.out.println(conn); String sql="insert into Student_information (name,sex,age) values(?,?,?)"; pstmt=conn.prepareStatement(sql); pstmt.setString(1,ee.getName()); pstmt.setString(2,ee.getSex()); pstmt.setInt(3, ee.getAge()); pstmt.execute(); }catch(ClassNotFoundException e){ e.printStackTrace(); }catch(SQLException e){ e.printStackTrace(); } return true; } public static void main(String[] args) { // TestJsp n=new TestJsp(); // n.addEmploy(); } }
5.新建一个Servlet类
package test; 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; import testjsp.Employ; import testjsp.TestJsp; /** * Servlet implementation class EmployeServlet */ @WebServlet("/EmployeServlet") public class EmployeServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public EmployeServlet() { 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()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); // String name=new String(request.getParameter("emplyname").getBytes("iso-8859-1"),"utf-8");//搜到的答案，不知道怎么用 String name=request.getParameter("emplyname"); String sex=request.getParameter("sex"); String age=request.getParameter("age"); Employ em=new Employ(); em.setName(name); em.setSex(sex); em.setAge(Integer.parseInt(age)); System.out.println(name); System.out.println(sex); System.out.println(Integer.parseInt(age)); TestJsp te=new TestJsp(); te.addEmploy(em); } }
6.新建一个web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app>
<welcome-file-list>
<welcome-file>MainPage.jsp</welcome-file>
</welcome-file-list>
<servlet>
<!-- servlet名称，与servlet-mapping中的servlet-name必须一致 -->
<servlet-name>EmployeServlet</servlet-name>
<!--Servlet类的位置-->
<servlet-class>test.EmployeServlet</servlet-class>
</servlet>
<servlet-mapping>
<!-- servlet名称，与上面中的servlet-name必须一致 -->
<servlet-name>EmployeServlet</servlet-name>
<url-pattern>/EmployeServlet/</url-pattern>
</servlet-mapping>
</web-app>
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