jsp+mysql数据库操作常用方法实例总结

3. delete 删除：

<%@ page contentType="text/html;charset=gb2312" %> 
<%@ page import="java.sql.*" %> 
 
 
 
 
 

<% Connection con; 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement stmt; 
Statement s; 
ResultSet rs; 
String id=request.getParameter("id");
try
{ 
stmt=con.createStatement();
String sql="delete from student where id="+id; 
stmt.executeUpdate(sql); 
s=con.createStatement(); 
rs=s.executeQuery("SELECT * FROM student"); 
out.print(""); 
out.print("");
out.print(""); 
out.print(""); 
out.print(""); 
while(rs.next()) 
{ out.print(""); 
out.print(""); 
out.print(""); 
out.print(""); 
String idstr=rs.getString(1);
out.print(""); 
out.print(""); 
out.print(""); 
out.print("") ; 
} 
out.print("
考生数据
添加考生信息
"+"姓名"); 
out.print("
"+"年龄"); 
out.print("
"+"出生日期"); 
out.print("
"+"操作"); 
out.print("
"+rs.getString(2)+"
"+rs.getString(3)+"
"+rs.getString(4)+"
"+idstr+"
删除
修改
"); 
con.close(); 
} 
catch(SQLException e1) 
{ 
out.print("SQL异常！！！！"); 
} 
%>

 

4. update 示例1：

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>







<%String id=request.getParameter("id");
 Connection con; 
 String name=null;
 String age=null;
 String birth=null;
 String id1=null;
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement sql; 
ResultSet rs; 
try
{ 
sql=con.createStatement(); 
rs=sql.executeQuery("SELECT * FROM student");
while(rs.next()) 
{ 
 name=rs.getString(2);
 age=rs.getString(3);
 birth=rs.getString(4);
 id1=rs.getString(1);
}
con.close(); 
} 
catch(SQLException e1) 
{ 
out.print("SQL异常！！！！"); 
} 
%>



 
  
 
姓名：
  
 
 

 年龄：
  
 
 
出生日期：
  
  

 
     

5. update 示例2：    

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.sql.*" %> 
<%
String name=request.getParameter("name");
String age=request.getParameter("age");
String birth=request.getParameter("birth");
String id1=request.getParameter("id1");
System.out.println(id1);
Connection con=null;
try
{ 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement sql; 
sql=con.createStatement(); 
String sql2="update student set name='"+name+"',age='"+age+"',birth='"+birth+"' where id="+id1;
System.out.print(sql2);
int s=sql.executeUpdate(sql2);
}
catch(Exception e){
System.out.println(e);
}
%>
恭喜你，修改成功！

查看

6. insert 插入

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.sql.*" %> 
<%
String name=request.getParameter("name");
String age=request.getParameter("age");
String birth=request.getParameter("birth");
Connection con=null;
try
{ 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement sql; 
sql=con.createStatement(); 
String sql2="insert into student(name,age,birth) values('"+name+"','"+age+"','"+birth+"')";
System.out.print(sql2);
int s=sql.executeUpdate(sql2);
}
catch(Exception e){
System.out.println(e);
}
%>
恭喜你，添加成功！

查看

7. 创建数据库

/*
MySQL Data Transfer
Source Host: localhost
Source Database: student
Target Host: localhost
Target Database: student
Date: 2009-3-27 13:24:01
*/
SET FOREIGN_KEY_CHECKS=0;
create database student;
use student;
-- ----------------------------
-- Table structure for student
-- ----------------------------
CREATE TABLE `student` (
 `id` int(11) NOT NULL auto_increment,
 `name` varchar(255) default NULL,
 `age` varchar(255) default NULL,
 `birth` varchar(255) default NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=gbk;

希望本文所述对大家的JSP程序设计有所帮助。