index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@ taglib tagdir="/WEB-INF/tags" prefix="inquire" %>
<%
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>My JSP 'index.jsp' starting page</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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action=""method=post name=form>
排序查询:
<br><input type="radio" name="orderType"value="price">按价格排序
<input type="radio" name="orderType"value="madeTime">按生产日期排序
<br><input type=submit name="g" value="提交">
</form>
<% String orderType=request.getParameter("orderType");
if(orderType==null)
orderType=""; %>
<inquire:SortTag orderType="<%=orderType%>"/>
根据排序方式:<%=orderType %>,排序的记录:
<br/><%=orderResult %>
</body>
</html>
oederTag.tag
<%@ tag pageEncoding="GB2312" %>
<%@ tag import="java.sql.*" %>
<%@ attribute name="orderType" required="true" %>
<%@ variable name-given="orderResult" scope="AT_END" %>
<% String orderCondition=
"SELECT * FROM product ORDER BY "+orderType;
StringBuffer result;
result=new StringBuffer();
try{ Class.forName("com.mysql.jdbc.Driver");
}
catch(Exception e){}
Connection con;
Statement sql;
ResultSet rs;
int n=0;
try{ result.append("<table border=1>");
String uri="jdbc:mysql://127.0.0.1/warehouse";
con=DriverManager.getConnection(uri,"root","");
DatabaseMetaData metadata=con.getMetaData();
ResultSet rs1=metadata.getColumns(null,null,"product",null);
int 字段个数=0;
result.append("<tr>");
while(rs1.next()){
字段个数++;
String clumnName=rs1.getString(4);
result.append("<td>"+clumnName+"</td>");
}
result.append("</tr>");
sql=con.createStatement();
rs=sql.executeQuery(orderCondition);
while(rs.next()){
result.append("<tr>");
for(int k=1;k<=字段个数;k++)
result.append("<td>"+rs.getString(k)+"</td>");
result.append("</tr>");
}
result.append("</table>");
con.close();
}
catch(SQLException e){
result.append("");
}
//返回orderResult对象 :
jspContext.setAttribute("orderResult",new String(result));
%>
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