JAVA里面如何格式化数字
写了个测试类希望能帮助到大家。这两个方法只需要传入你要格式话的数据,就可以返回你想要的结果了。 package com.line;public class T9 {
/**
* b格式化一般数据为财务格式,eg:123,456,789.00/b
*
* @param source
* String
* @return String
*/
public static String getCaiWuData(String source) {
StringBuffer str = new StringBuffer("");
if (source != null !source.equals("") source.length() 0
!source.equals("null")) {
if (source.lastIndexOf(",") 0) {
source =formatStr(source);
}
int dotIndex = 0;
if (source.indexOf(".") 0) {
source += ".00";
}
dotIndex = source.indexOf(".");
int index = 0;
String opt = "";
opt = source.substring(0, 1);
if (opt.equals("-")) {
source = source.substring(1);
str.append("-");
dotIndex = source.indexOf(".");
}
if (dotIndex 3) {
index += 1;
str.append(source.substring(0, dotIndex));
}
if (dotIndex % 3 == 0) {
index += dotIndex / 3;
} else {
index += (dotIndex - dotIndex % 3) / 3;
}
if (index 0 dotIndex = 3) {
for (int i = index; i 0; i--) {
if (i == index) {
str.append(source.substring(0, dotIndex - i * 3));
}
if (dotIndex - i * 3 0) {
str.append(",");
}
if (i = 1) {
str.append(source.substring(dotIndex - i * 3, dotIndex
- (i - 1) * 3));
}
}
}
str.append(source.substring(dotIndex));
}
if (source.length() - source.lastIndexOf(".") 3) {
str.append("0");
}
int dot_index = str.toString().indexOf(".") + 2;
int str_len = str.toString().length();
char[] strArr = str.toString().toCharArray();
StringBuffer rev = new StringBuffer();
for (int i = str_len - 1; i 0; i--) {// 除去尾数0,小数点后保留2位
if (i dot_index
Integer.parseInt(new Character(strArr[i]).toString()) 0) {
rev.append(str.toString().substring(0, i + 1));
break;
} else if (i == dot_index (int) strArr[i] = 0) {
rev.append(str.toString().substring(0, dot_index + 1));
break;
}
}
return rev.toString();
}
/**
* b格式化财务数据为一般字符串,eg:123456789.00/b
*
* @param source
* String
* @return String
*/
public static String formatStr(String source) {
StringBuffer str = new StringBuffer("");
if (source != null !source.equals("") source.length() 0
!source.equals("null")) {
String temp = source.substring(0, 1);
if (temp.equals("-")) {
source = source.substring(1);
str.append("-");
}
String[] myarr = source.split(",");
int lastIndex = source.lastIndexOf(",");
if (lastIndex 0) {
for (int i = 0; i myarr.length; i++) {
str.append(myarr[i]);
}
}
if (source.lastIndexOf(",") 0) {
str.append(source);
}
if (source.lastIndexOf(".") 0) {
str.append(".00");
}
if (source.length() - source.lastIndexOf(".") 3
!"0".equals(source)) {
str.append("0");
}
} else {
return (str.append("0.00").toString());
}
return str.toString();
}
/**
* @param args
*/
public static void main(String[] args) {
T9 t=new T9();
System.out.println(t.getCaiWuData("1231313"));
System.out.println(t.formatStr("1,231,313.00"));
}}
java.text.DecimalFormat如何将数字格式化为金额格式,而且小数点保留任意位
DecimalFormat myformat = new DecimalFormat();
myformat.applyPattern("##,###.000");
System.out.println(myformat.format(11112345.12345));
java数字格式化
用 %3.2f格式化后, 替换逗号即可;
同理, 用 #,##0.00 格式化后, 替换, 为空格即可.
你的需求:
double x = 1234.5;
DecimalFormat df = new DecimalFormat("#,###.0");
String xs = df.format(x);
xs = xs.replace(",", " ").replace(".", ",");
System.out.println(xs);
输出
1 234,5
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