一）登录页面
1 <%@page import="java.sql.*"%> 2 <%@ page language="java" contentType="text/html; charset=UTF-8" 3 pageEncoding="UTF-8"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>学生信息</title> 9 </head> 10 <body> 11 学生信息列表 12 <br> 13 <% 14 try 15 { 16 //连接数据库 17 18 //1)、加载驱动 19 Class.forName("oracle.jdbc.driver.OracleDriver"); 20 String strUrl="jdbc:oracle:thin:@localhost:1521:ORCL"; 21 22 Connection conn=DriverManager.getConnection(strUrl, "test", "test"); 23 //2)、得到连接 24 25 //读取 26 Statement st=conn.createStatement(); 27 ResultSet rs=st.executeQuery("select t.* from T_STUDENT t"); 28 //输出结果集 29 if(rs!=null) 30 { 31 while(rs.next()) 32 { 33 out.print("sno="+rs.getString("sno")+" "); 34 out.print("name="+rs.getString("sname")+" "); 35 out.print("ssex="+rs.getString("ssex")+""); 36 out.print("sbirthday="+rs.getDate("sbirthday")+" "); 37 out.print("class="+rs.getString("class")+"<br>"); 38 } 39 } 40 //释放资源 41 st.close(); 42 conn.close(); 43 rs.close(); 44 } 45 catch(Exception ex) 46 { 47 ex.printStackTrace(); 48 } 49 %> 50 添加学生信息 51 <form action="savet_student" method="post"> 52 学号<input type="text" name="sno"><br> 53 名称<input type="text" name="sname"><br> 54 性别<input type="text" name="ssex"><br> 55 生日<input type="text" name="sbirthday"><br> 56 班级<input type="text" name="class"><br> 57 <input type="submit" value="保存"> 58 </form> 59 60 </body> 61 </html>
二）转码页面
1 package com.haiqi.web; 2 3 import java.io.IOException; 4 import javax.servlet.Filter; 5 import javax.servlet.FilterChain; 6 import javax.servlet.FilterConfig; 7 import javax.servlet.ServletException; 8 import javax.servlet.ServletRequest; 9 import javax.servlet.ServletResponse; 10 11 12 public class myfilter implements Filter { 13 14 public myfilter() { 15 // TODO Auto-generated constructor stub 16 } 17 18 19 public void destroy() { 20 // TODO Auto-generated method stub 21 } 22 23 24 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { 25 request.setCharacterEncoding("UTF-8"); 26 response.setContentType("text/html"); 27 response.setCharacterEncoding("UTF-8"); 28 chain.doFilter(request, response); 29 } 30 31 32 public void init(FilterConfig fConfig) throws ServletException { 33 // TODO Auto-generated method stub 34 } 35 36 }
三）跳转页面
1 package com.haiqi.web; 2 3 import java.io.IOException; 4 import java.sql.*; 5 6 import javax.servlet.ServletException; 7 import javax.servlet.http.HttpServlet; 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse; 10 11 public class savet_student extends HttpServlet { 12 private static final long serialVersionUID = 1L; 13 14 public savet_student() { 15 super(); 16 // TODO Auto-generated constructor stub 17 } 18 19 protected void doGet(HttpServletRequest request, HttpServletResponse response) 20 throws ServletException, IOException { 21 // 处理保存数据的请求 22 23 // 1)接收参数 24 String sno = request.getParameter("sno"); 25 String sname = request.getParameter("sname"); 26 String ssex = request.getParameter("ssex"); 27 String sbirthday = request.getParameter("sbirthday"); 28 String sclass = request.getParameter("class"); 29 // 2)验证 30 31 if (sno != null && sno.trim().length() != 0 && sname != null && sname.trim().length() != 0) 32 33 { 34 try { 35 Class.forName("oracle.jdbc.driver.OracleDriver"); 36 String strUrl = "jdbc:oracle:thin:@localhost:1521:ORCL"; 37 38 Connection conn = DriverManager.getConnection(strUrl, "test", "test"); 39 40 // 2)、得到连接 41 // 3)保存 42 // 读取 43 PreparedStatement pst = conn.prepareStatement("insert into t_student(sno,sname,ssex,class)" + "values(?,?,?,?)"); 44 pst.setString(1, sno); 45 pst.setString(2, sname); 46 pst.setString(3, ssex); 47 // pst.setDate(parameterIndex, x); 48 pst.setString(4, sclass); 49 pst.executeUpdate(); 50 51 pst.close(); 52 conn.close(); 53 // 4)跳转页面 54 response.setHeader("refresh", "3;URL=index.jsp"); 55 response.getWriter().write("请正确提交数据"); 56 57 } 58 catch (Exception e) { 59 e.printStackTrace(); 60 } 61 } 62 63 else { 64 response.setHeader("reflush", "3;URL=index.jsp"); 65 response.getWriter().write("请正确提交数据"); 66 } 67 68 //response.getWriter().append("Served at: ").append(request.getContextPath()); 69 } 70 71 protected void doPost(HttpServletRequest request, HttpServletResponse response) 72 throws ServletException, IOException { 73 74 doGet(request, response); 75 } 76 77 }