169 lines
3.7 KiB
Java
169 lines
3.7 KiB
Java
package com.tenwa.reckon.util;
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import java.math.BigDecimal;
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import java.util.List;
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import java.util.regex.Pattern;
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/**
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*
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* @author SHIHONGFEI
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* @version 1.0
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* @copyright (C) TENWA 2011
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* @date 2011-2-17
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* @desc ( 数字类型处理类)
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*/
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public class NumTools {
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/**
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* 判断是否为浮点数，包括double和float
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*
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* @param str
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* 传入的字符串
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* @return 是浮点数返回true,否则返回false
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*/
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public static boolean isDouble(String str) {
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Pattern pattern = Pattern.compile("^[-\\+]?[.\\d]*$");
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return pattern.matcher(str).matches();
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}
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/**
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* 判断是否为整数
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*
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* @param str
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* 传入的字符串
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* @return 是整数返回true,否则返回false
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*/
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public static boolean isInteger(String str) {
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System.out.println(":::");
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Pattern pattern = Pattern.compile("^[-\\+]?[\\d]*$");
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return pattern.matcher(str).matches();
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}
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/**
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*
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* @param value
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* @return
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*/
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public static String getZeroStr(String value) {
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try {
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String temp_n = value;
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if (temp_n == null || temp_n.equals("") || temp_n.equals("null")) {
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temp_n = "0";
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}
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return temp_n;
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} catch (Exception e) {
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}
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return "0";
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}
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/**
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* double四舍五入处理 scale--精度
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*
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* @param dbl
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* @param scale
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* @return
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*/
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public double rnddouble(double dbl, int scale) {
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try {
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BigDecimal temp_bd = new BigDecimal(dbl);
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double newdbl = temp_bd.setScale(scale, BigDecimal.ROUND_HALF_UP).doubleValue();
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return newdbl;
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} catch (Exception e) {
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}
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return 0;
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}
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/**
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*
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* @param str
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* 要处理的数值
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* @param num
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* 精确到小数点后位数
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* @return
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*/
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public static String formatNumberDoubleScale(String str, int num) {
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try {
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String temp_num = str;
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if ((temp_num == null) || (temp_num.equals(""))) {
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temp_num = "";
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} else {
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temp_num = new BigDecimal(temp_num).setScale(num, BigDecimal.ROUND_HALF_UP).toString();
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}
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return temp_num;
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} catch (Exception e) {
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}
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return "0";
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}
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/**
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*
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* (从第startList开始求和corpus的值)
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*
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* @param corpus
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* @param startList
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* 开始求和起点,从1开始
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* @return
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*/
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public static String getSumCorpusOverage(List<String> corpus, int startList) {
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BigDecimal bd = new BigDecimal("0");
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for (int i = startList - 1; i < corpus.size(); i++) {
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bd = bd.add(new BigDecimal(corpus.get(i).toString()));
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}
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return bd.toString();
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}
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// 数字格式化 xx,xxx,xxx.xx
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public static String formatNumberDouble(double numstr) {
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try {
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String temp_num = String.valueOf(numstr);
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if ((temp_num == null) || (temp_num.equals(""))) {
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temp_num = "";
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} else {
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java.text.DecimalFormat ft = new java.text.DecimalFormat("#,##0.00");
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BigDecimal bd = new BigDecimal(temp_num);
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temp_num = ft.format(bd);
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}
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return temp_num;
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} catch (Exception e) {
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}
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return "";
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}
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public static String calculationStr(String num1, String num2, char type, int accuracy) {
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String rs = "";
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num1 = num1.equals("") ? "0" : num1;
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num2 = num2.equals("") ? "0" : num2;
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BigDecimal bigNum1 = new BigDecimal(num1);
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BigDecimal bigNum2 = new BigDecimal(num2);
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switch (type) {
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case '+':
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rs = bigNum1.add(bigNum2).setScale(accuracy, BigDecimal.ROUND_HALF_UP).toString();
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break;
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case '-':
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rs = bigNum1.subtract(bigNum2).setScale(accuracy, BigDecimal.ROUND_HALF_UP).toString();
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break;
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case '*':
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rs = bigNum1.multiply(bigNum2).setScale(accuracy, BigDecimal.ROUND_HALF_UP).toString();
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break;
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case '/':
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if (bigNum1.equals("0")) {
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rs = "0";
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break;
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}
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rs = bigNum1.divide(bigNum2, accuracy, BigDecimal.ROUND_HALF_UP).toString();
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break;
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default:
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break;
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}
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return rs;
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}
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public static char ADD = '+';
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public static char SUBTRACT = '-';
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public static char MULTIPLY = '*';
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public static char DIVIDE = '/';
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}
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