new41.jsp
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.Connection"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String driverName = "com.mysql.jdbc.Driver";
String userName = "root";
String userPwd = "mysql123";
String dbName = "test";
String url = "jdbc:mysql://localhost:3306/" + dbName + "?useUnicode=true&characterEncoding=utf8";
Class.forName(driverName);
Connection conn = DriverManager.getConnection(url,userName,userPwd);
request.setCharacterEncoding("utf-8");
String sql = "delete from stu_info where weight >= ?";
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setFloat(1, 90);
int n = pstmt.executeUpdate();
if(n >= 1)
{
out.print("数据删除成功，共删除" + n + "条记录");
}
else
{
out.print("数据删除失败！");
}
if(pstmt != null)
{
pstmt.close();
}
if(conn != null)
{
conn.close();
}
%>
</body>
</html>
