StringUtil7.java
public class StringUtil7 {
private long longValue;//要分位的数字
private int digit;//分位位数
private String formatStr;//分位后的字符串
public StringUtil7(){}
public long getLongValue() {
return longValue;
}
public void setLongValue(long longValue) {
this.longValue = longValue;
}
public int getDigit() {
return digit;
}
public void setDigit(int digit) {
this.digit = digit;
}
public String getFormatStr() {
StringBuffer sb= new StringBuffer(String.valueOf(longValue));
sb=sb.reverse();//反转
int l=sb.length();
if(digit==0) digit=1;//如果分位位数为0，设置字符串的长度为分位位数
int count=0;
/*计算出插入的分位符个数*/
if(l%digit==0) count=l/digit-1;
else count=l/digit;
for (int i = 0; i < count; i++) {
sb=sb.insert((i+1)*digit+i, ",");//在分位位置插入分位符
}
return sb.reverse().toString();
}
public void setFormatStr(String formatStr) {
this.formatStr = formatStr;
}
}
index.jsp
<body>
<form action="result.jsp" method="post">
<table>
<tr>
<td align="right">请输入数字：</td>
<td><input type="text" name="longValue"/></td>
</tr>
<tr>
<td align="right">请输入分位位数：</td>
<td><input type="text" name="digit"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="分位显示"/></td>
</tr>
</table>
</form>
</body>
result.jsp
<body>
<%
request.setCharacterEncoding("utf-8");
String longValueStr= request.getParameter("longValue");
String digit=request.getParameter("digit");
long longValue=Long.parseLong(longValueStr);
int d= Integer.parseInt(digit);
%>
<jsp:useBean id="strBean" class="com.count.StringUtil7"></jsp:useBean>
<jsp:setProperty property="longValue" name="strBean" value="<%=longValue %>"/>
<jsp:setProperty property="digit" name="strBean" value="<%=d %>"/>
<table>
<tr>
<td>分位之前的数字：</td>
<td align="left">
<jsp:getProperty property="longValue" name="strBean"/>
</td>
</tr>
<tr>
<td>分位之后的字符串：</td>
<td align="left">
<jsp:getProperty property="formatStr" name="strBean"/>
</td>
</tr>
</table>
</body>
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