html页面的单选按钮和下拉列表框的默认值显示数据库的值！（紧急）

<form id="query_form" method="post" action="">

<p><font color="#317eac" size="5" face="微软雅黑">Mail Settings</font></p>

<ul style="list-style-type:square">

<li><p>Overdue bugs Reminder Yes<input type="radio" value="Yes" name="pastDue"/>

No<input type="radio" value="No" name="pastDue" checked="checked"/></p></li>

<li><p>Bugs to Process Reminder Yes<input type="radio" value="Yes" name="aboutOf"/>

//加判断啊

No<input type="radio" value="No" name="aboutOf" checked="checked"/></p></li>

</ul>

<p id="location"><font size="3" face="微软雅黑">Will Overdue Bugs Reminder(Days):</font>

<select name='sldd' style='width:100pxheight: 25px'>

<option value="1" selected="selected">1</option>

<option value="2">2</option>

<option value="3">3</option>

<option value="4">4</option>

<option value="5">5</option>

<option value="6">6</option>

<option value="7">7</option>

</select>

</p>

<p id="searchs"><input type="button" value="Confirm" onclick="history_query()"/></p>

</form>

jsp下拉列表框默认显示查询的一条数据可以给select标签赋值，只取其中的一条数据即可。

import java.util.ArrayList

import java.util.Iterator

public class Test{

ArrayList list

// constructorbuilds some sample data.

public Test(){

this.list = new ArrayList()

this.list.add(new String[]{"1", "January"})

this.list.add(new String[]{"2", "February"})

this.list.add(new String[]{"3", "March"})

this.list.add(new String[]{"4", "April"})

this.list.add(new String[]{"5", "May"})

this.list.add(new String[]{"6", "June"})

this.list.add(new String[]{"7", "July"})

this.list.add(new String[]{"8", "August"})

this.list.add(new String[]{"9", "September"})

this.list.add(new String[]{"10", "October"})

this.list.add(new String[]{"11", "November"})

this.list.add(new String[]{"12", "December"})

}

[B]

/**

* @return The months of the year as HTML Option tags.

* @param The number of the selected month as a string.

*/

public String getMonthAsOptions(String selectedMonth){

StringBuffer sb = new StringBuffer()

for(Iterator i = this.list.iterator()i.hasNext()){

String[] m = (String[])i.next()

String monthNumber = m[0]

String monthText = m[1]

sb.append("<option value=\"")

sb.append(monthNumber)

sb.append("\"")

if(monthNumber.equals(selectedMonth))

sb.append(" selected")

sb.append(">")

sb.append(monthText)

sb.append("</option>\n")

}

return sb.toString()

}

[/B]

// main method for testing and debugging only

public static void main(String[] args){

String selectedMonth = "4"

if(args.length >0)

selectedMonth = args[0]

Test test = new Test()

System.out.println(test.getMonthAsOptions(selectedMonth))

}

}

<option value="0" selected="selected">默认值</option>

要默认的 加上 selected="selected"。

<option selected="selected" value="<?php echo $result['genrename']?>"><?php echo $result['genrename']?></option>

默认的值是上个option得到的，程序中没有<option selected="selected" value="<s:property value='#cost.costcent'/>">的。

效果是如果yc的值等于0，select默认选中否，如果等于1，则默认选中是。

不使用控件。

拓展资料：

background-color是用来设置元素的背景颜色。

ex：

<div style="background-color:red width:200pxheight:200px"></div>。

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