删除条件提交页面：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <body> 请选择删除记录条件<hr width="100%" size="3"> <form action="delete_stu_2.jsp" method="post"> 性名：<input type="text" name="name"><br><br> 性别：男<input type="radio" value="man" name="sex"> 女<input type="radio" value="woman" name="sex"><br><br> 体重范围：<p> 最小<input type="text" name="w1"><br><br> 最大<input type="text" name="w2"><p> <input type="submit" value="提 交"> <input type="reset" value="取 消"> </form> </body> </html>
从提交页面获取查询信息，在数据库表中查询满足该条件的记录。
<%@ page contentType="java" import="java.sql.*" pageEncoding="utf-8"%> <html> <body> <%String driverName="com.mysql.jdbc.Driver"; String userName="root"; String userPwd="123456"; String dbName="student"; String url1="jdbc:mysql://localhost:3306/"+dbName; String url2="?user="+userName+"&password="+userPwd; String url3="&useUnicode=true&characterEncoding=UTF-8"; String url=url1+url2+url3; Class.forName(driverName); Connection conn=DriverManager.getConnection(url); request.setCharacterEncoding("utf-8"); String name=request.getParameter("name"); String sex=request.getParameter("sex"); String ww1=request.getParameter("w1"); String ww2=request.getParameter("w2"); String s="1=1"; if(!name.equals(""))s=s+"and name='"+name+"'"; if(sex!=null)s=s+"and sex='"+sex+"'"; float w1,w2; if(!ww1.equals("")){w1=Float.parseFloat(ww1);s=s+"and weight>="+w1;} if(!ww2.equals("")){w2=Float.parseFloat(ww2);s=s+"and weight<="+w2;} String sql="delete from stu_info where"+s; PreparedStatement pstmt=conn.prepareStatement(sql); int n=pstmt.executeUpdate(); if(n==1){%>数据删除操作成功！<br><%} else{ %>数据删除操作失败<br><%} if(pstmt!=null){pstmt.close();} if(conn!=null){conn.close();} %> </body> </html>