数据格式化帮助类

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package hk.buttonwood.ops.common;

import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.lang.StringUtils;

public class FmtUtils {
private static final String pattern = "yyyy-MM-dd HH:mm:ss";

private static final String pattern1 = "yyyyww";

private static final String pattern2 = "yyyy-MM-dd";

private static final String pattern3 = "MM/dd";

private static final String pattern4 = "MM/dd HH:mm";

private static final String pattern5 = "yyyyMMdd";

private static final String pattern6 = "HHmmssSS";

private static final String pattern7 = "HHmm";

private static final String pattern8 = "yyMMdd";

static final String M = "M";

static final String K = "K";

public static String formatDate(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.format(d);
}

public static String formatDateWeekInYear(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf1 = new SimpleDateFormat(pattern1);
return sdf1.format(d);
}

public static String formatPercent(BigDecimal b) {
if (b == null) {
return "";
} else {
String pattern = "0.00";
DecimalFormat df = new DecimalFormat(pattern);
return df.format(b.doubleValue() * 100) + "%";
}
}

public static String formatDateWithoutTime(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf2 = new SimpleDateFormat(pattern2);
return sdf2.format(d);
}

public static String formatDateShort(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf3 = new SimpleDateFormat(pattern3);
return sdf3.format(d);
}

public static String formatDateMiddle(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf4 = new SimpleDateFormat(pattern4);
return sdf4.format(d);
}

public static String formatDateyyyyMMdd(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf5 = new SimpleDateFormat(pattern5);
return sdf5.format(d);
}

public static String formatDateyyMMdd(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf8 = new SimpleDateFormat(pattern8);
return sdf8.format(d);
}

public static Date int2Date(Integer i) {
SimpleDateFormat sdf5 = new SimpleDateFormat(pattern5);
try {
return sdf5.parse(String.valueOf(i));
} catch (ParseException e) {
return null;
}
}

public static Integer date2int(Date d) {
if (d == null) {
return null;
}
SimpleDateFormat sdf5 = new SimpleDateFormat(pattern5);
String s = sdf5.format(d);
return Integer.valueOf(s);
}

public static String formatDateHHmmssSS(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf6 = new SimpleDateFormat(pattern6);
String s = sdf6.format(d);
return StringUtils.left(s, 8);
}

public static String formatDateHHmm(Date d) {
if (d == null) {
return "";
}
SimpleDateFormat sdf7 = new SimpleDateFormat(pattern7);
return sdf7.format(d);
}

public static String blank(Object o) {
if (o == null) {
return "*空白*";
}
if (StringUtils.isEmpty(String.valueOf(o))) {
return "*空白*";
}
return StringUtils.isEmpty(o.toString()) ? "*空白*" : o.toString();
}
/*
* 指定精度格式化BigDemcial
* @param:对应值
* @param:精度，#.00小数点后两位
* @return:返回格式化后的数据
*/
public static String formatDecimalWithScale(String value,String scale){
String v=null;
try{
BigDecimal bigDecimal=new BigDecimal(value);
v=new java.text.DecimalFormat(scale).format(bigDecimal);
}catch(Exception e){
v="0.0000000000";
e.printStackTrace();
}
return v;
}
public static String empty(Object o) {
if (o == null) {
return "";
}
if (StringUtils.isEmpty(String.valueOf(o))) {
return "";
}
return StringUtils.isEmpty(o.toString()) ? "" : o.toString();
}

public static String hold3Decimal(BigDecimal d) { // 保留3位小数位，按四舍五入
try {
String pattern = "0.000";
DecimalFormat df = new DecimalFormat(pattern);
String s = df.format(d);
if (s.equals("-0.000")) {
s = "0.000";
}
return s;
} catch (Exception ex) {
return "";
}

}

public static String hold2Decimal(BigDecimal d) { // 保留2位小数位，按四舍五入
try {
String pattern = "0.00";
DecimalFormat df = new DecimalFormat(pattern);
String s = df.format(d);
if (s.equals("-0.00")) {
s = "0.00";
}
return s;
} catch (Exception ex) {
return "";
}
}

public static String hold1Decimal(BigDecimal d) { // 保留1位小数位，按四舍五入
try {
String pattern = "0.0";
DecimalFormat df = new DecimalFormat(pattern);
String s = df.format(d);
if (s.equals("-0.00")) {
s = "0.00";
}
return s;
} catch (Exception ex) {
return "";
}
}

public static String formatDecimal(BigDecimal d) { // 格式化数字显示
// 2342565.555->2,342,565.56
try {
String pattern = "##,##0.00";
DecimalFormat declimalFormat = new DecimalFormat(pattern);
String s = declimalFormat.format(d.doubleValue());
if (s.equals("-0.00")) {
s = "0.00";
}
return s;
} catch (Exception ex) {
return "";
}

}

public static String hold0Decimal(BigDecimal d) { // 格式化数字显示
try {
String pattern = "####0.##";
DecimalFormat declimalFormat = new DecimalFormat(pattern);
String s = declimalFormat.format(d.doubleValue());
if (s.equals("-0.00")) {
s = "0.00";
}
return s;
} catch (Exception ex) {
return "";
}
}

public static String noDecimal(BigDecimal d) { // 只保留整数
try {
String pattern = "####0";
DecimalFormat declimalFormat = new DecimalFormat(pattern);
String s = declimalFormat.format(d.doubleValue());
if (s.equals("-0")) {
s = "0";
}
return s;
} catch (Exception ex) {
return "";
}
}

public static String formatInt(BigDecimal d) { // 格式化数字显示
// 2342565.555->2,342,565.56
try {
String pattern = "##,##0";
DecimalFormat declimalFormat = new DecimalFormat(pattern);
String s = declimalFormat.format(d.doubleValue());
if (s.equals("-0")) {
s = "0";
}
return s;
} catch (Exception ex) {
return "";
}
}

public static String formatInt(Integer d) { // 格式化数字显示
// 2342565.555->2,342,565.56
try {
String pattern = "##,##0";
DecimalFormat declimalFormat = new DecimalFormat(pattern);
String s = declimalFormat.format(d);
if (s.equals("-0")) {
s = "0";
}
return s;
} catch (Exception ex) {
return "";
}
}

public static String formatLong(Long d) { // 格式化数字显示
// 2342565.555->2,342,565.56
try {
String pattern = "##,##0";
DecimalFormat declimalFormat = new DecimalFormat(pattern);
String s = declimalFormat.format(d);
if (s.equals("-0")) {
s = "0";
}
return s;
} catch (Exception ex) {
return "";
}
}

public static String shortQty(Integer qty) { // 将数量转换格式，1000->1K,1000000->1M
try {
String retVal = "";
double d = 0.0;
if (qty.doubleValue() >= 1000000) { // 大于1000000
d = qty.doubleValue() / 1000000;
if ((d * 10) / ((int) d * 10) != 1)
retVal = (new Double(d).toString() + M);
// retVal=formatDecimal(new BigDecimal(d))+M;
else
retVal = new Integer((int) d).toString() + M;
return retVal;
}
if (qty.doubleValue() >= 1000) { // 大于1000
d = qty.doubleValue() / 1000;
if ((d * 10) / ((int) d * 10) != 1)
retVal = (new Double(d).toString() + K);
else
retVal = new Integer((int) d).toString() + K;
return retVal;
}
if (qty.doubleValue() <= -1000000) { // 小于-1000000
d = qty.doubleValue() / 1000000;
if ((d * 10) / ((int) d * 10) != 1)
retVal = (new Double(d).toString() + M);
else
retVal = new Integer((int) d).toString() + M;
return retVal;
}
if (qty.doubleValue() <= -1000) { // 小于1000
d = qty.doubleValue() / 1000;
if ((d * 10) / ((int) d * 10) != 1)
retVal = (new Double(d).toString() + K);
else
retVal = new Integer((int) d).toString() + K;
return retVal;
}
if (qty.doubleValue() - Math.floor(qty.doubleValue()) == 0) // 整数返回整数，有小数返回小数
retVal = (new Long(qty.longValue()).toString());
else
retVal = (new Double(qty.doubleValue()).toString());
return retVal;
} catch (Exception ex) {
return "";
}
}

public static void main(String[] args) {
Date d = new Date();
System.out.println(d);
System.out.println(formatDateHHmmssSS(d));
}
}

数据格式化帮助类

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原文地址：http://www.cnblogs.com/maybo/p/5182535.html