将数字字符串格式化为指定长度
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将数字字符串格式化为指定长度
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將數(shù)字字符串格式化為指定長度的JavaScript函數(shù)
function formatNum(number,len){var strLength = len - number.length;//格式長度減去數(shù)字的長度，就是數(shù)字前補"0"的個數(shù)for(var i=0; i<strLength;i++){number = "0"+number;}return number;} **判斷和改變長度** function convert(){var number = document.getElementById("number").value;var num_len = document.getElementById("num_len").value;if(number==""){alert("請輸入要格式化的數(shù)字！");document.getElementById("number").focus();return;}if(isNaN(number)){alert("您輸入的數(shù)字不正確！");document.getElementById("number").focus();return;}if(num_len==""){alert("請輸入格式化后字符串的長度！");document.getElementById("num_len").focus();return;}if(isNaN(number)){alert("您輸入的格式化字符串的長度不正確！");document.getElementById("num_len").focus();return;}document.getElementById("convertStr").value = formatNum(number,num_len); } <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% 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>將數(shù)字字符串格式化為指定長度</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">--><script language="javascript"> /***格式化數(shù)字*@number ：要格式化的數(shù)字*@len：格式長度 *@return ：返回格式化后的數(shù)字*/function formatNum(number,len){var strLength = len - number.length;//格式長度減去數(shù)字的長度，就是數(shù)字前補"0"的個數(shù)for(var i=0; i<strLength;i++){number = "0"+number;}return number;}function convert(){var number = document.getElementById("number").value;var num_len = document.getElementById("num_len").value;if(number==""){alert("請輸入要格式化的數(shù)字！");document.getElementById("number").focus();return;}if(isNaN(number)){alert("您輸入的數(shù)字不正確！");document.getElementById("number").focus();return;}if(num_len==""){alert("請輸入格式化后字符串的長度！");document.getElementById("num_len").focus();return;}if(isNaN(number)){alert("您輸入的格式化字符串的長度不正確！");document.getElementById("num_len").focus();return;}document.getElementById("convertStr").value = formatNum(number,num_len);}</script><style type="text/css">table{font-size: 13px;font-family: 楷體;color:navy;}input{font-size: 13px;font-family: 楷體;color:navy;}font{font-size: 12px;font-family: 楷體;color:orangered;}.style1{width: 500px;height: 160px;}</style></head><body><fieldset class="style1"><legend>數(shù)字字符串格式化</legend><form action="" id="myform"><table align="center"><tr><td>請輸入要格式化的數(shù)字：</td></tr> <tr><td><input type="text" id="number"> </td></tr><tr><td>請輸入格式化后字符串的長度：</td></tr> <tr><td><input type="text" id="num_len"/></td></tr><tr><td>格式化后的字符串：</td></tr> <tr><td><input type="text" id="convertStr"/></td></tr> <tr><td align="center"><input type="button" value="轉 換" "convert()"></td></tr></table></form></fieldset></body> </html>總結
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