jdbc实现简单的增删改查

先是Book类。

略

然后一个主页，写一个表单，提交Book的信息到AddBook。

略

AddBook.jsp连接jdbc，并向Book表插入。

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import ="java.sql.Connection"%>
<%@ page import ="java.sql.DriverManager"%>
<%@ page import ="java.sql.PreparedStatement"%>
<%@ page import ="java.sql.ResultSet"%>
<%@ page import ="java.sql.Statement"%>
<%@ page  import ="java.sql.*"%> 

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">

    <title>uuuu</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
  </head>

  <body>
          <%request.setCharacterEncoding("UTF-8"); %>
        <jsp:useBean id = "book"  class = "Book" ></jsp:useBean>
        <jsp:setProperty property="" name="book"/>
  <%
           try{
            Class.forName("oracle.jdbc.driver.OracleDriver");
            //new oracle.jdbc.driver.OracleDriver();
            Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE", "yu", "123");
           String sql = "insert into Book(id,name,price,book_count,author)values(?,?,?,?,?)";
           PreparedStatement ps = conn.prepareStatement(sql);
           ps.setInt(1, book.getId());
           ps.setString(2, book.getName());
           ps.setDouble(3, book.getPrice());
           ps.setInt(4, book.getBookCount());
           ps.setString(5, book.getAuthor());
           int row = ps.executeUpdate();
           if(row > 0){
                   out.print("成功了" + row + "条数据");
            }
            ps.close();
            conn.close();
    }catch(Exception e){
               e.printStackTrace();
   }     

 %>
 <br>
 <a href="index.jsp">返回</a>
  </body>
</html>

增  的 思路就是这么简单。

查询需要用到ResultSet。

修改只需update的sql语句。

删除只需delete的sql语句。