package com.qxueyou.scc.base.util;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.math.MathContext;
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import java.text.DecimalFormat;
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import java.util.Random;
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import java.util.regex.Pattern;
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import org.apache.commons.lang3.StringUtils;
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import org.springframework.web.servlet.ModelAndView;
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import com.qxueyou.scc.exercise.model.ExerciseItemAnswerU;
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public class CommonUtils {
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/** 一位小数 */
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public static final String PARTEN_ONE = "#.#";
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/** 二位小数 */
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public static final String PARTEN_TWO = "#.##";
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//地球半径
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private static final double EARTH_RADIUS = 6378.137;
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/**
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* 答案显示图形颜色 自定义
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* @return
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*/
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public static String[] getColors(){
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String[] colors = new String[]{"#4572a7","#aa4643","#89a54e","#80699b","#3d96ae","#a56f8f","#9f7961","#6f83a5"};
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return colors;
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}
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/**
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* 课程表显示图形颜色 自定义
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* @return
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*/
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public static String[] getRGBColors(){
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String[] colors = new String[]{"21,199,165","130,191,173","155,238,222","178,235,202","210,210,174","205,186,117",
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"220,205,166","233,174,160","240,94,104","169,169,169"};
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return colors;
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}
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/**
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* 换算为2位小数
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* @return
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*/
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public static String formatDecimalFormat(Object obj, String parten){
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DecimalFormat decimal = new DecimalFormat(parten);
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return decimal.format(obj);
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}
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/**
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* 删除字符最后的符号
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* @return
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*/
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public static String removeStrLastComma(String string){
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String str = string;
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if(StringUtils.isBlank(str)){
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return str;
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}
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String lastStr = str.substring(str.length()-1);
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if(lastStr.indexOf(',') > -1){
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str = str.substring(0, str.length()-1);
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}
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return str;
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}
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/**
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* 转换答案值 0,1,2
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* @param correct
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* @return
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*/
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public static byte parseInteractCorrectValue(String correct){
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byte value;
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if("true".equals(correct)){
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value=ExerciseItemAnswerU.CORRECT_RIGHT;//正确
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}else if("false".equals(correct)){
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value=ExerciseItemAnswerU.CORRECT_ERROR;//错误
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}else{
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value=7;//未知
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}
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return value;
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}
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/**
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* // 进行加法运算
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* @param d1
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* @param d2
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* @return
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*/
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public static double add(double d1, double d2){
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BigDecimal b1 = new BigDecimal(String.valueOf(d1));
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BigDecimal b2 = new BigDecimal(String.valueOf(d2));
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return b1.add(b2).doubleValue();
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}
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/**
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* // 进行减法运算
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* @param d1
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* @param d2
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* @return
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*/
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public static double subtract(double d1, double d2){
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BigDecimal b1 = new BigDecimal(String.valueOf(d1));
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BigDecimal b2 = new BigDecimal(String.valueOf(d2));
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return b1.subtract(b2).doubleValue();
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}
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/**
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* // 进行乘法运算
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* @param d1
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* @param d2
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* @return
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*/
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public static double multiply(double d1, double d2){
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BigDecimal b1 = new BigDecimal(String.valueOf(d1));
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BigDecimal b2 = new BigDecimal(String.valueOf(d2));
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return b1.multiply(b2).doubleValue();
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}
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/**
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* // 进行除法运算 四舍五入
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* @param d1
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* @param d2
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* @return
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*/
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public static double divide(double d1,double d2,int len) {// 进行除法运算
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BigDecimal b1 = new BigDecimal(String.valueOf(d1));
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BigDecimal b2 = new BigDecimal(String.valueOf(d2));
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return b1.divide(b2,len,BigDecimal.ROUND_HALF_UP).doubleValue();
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}
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/**
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* // 进行除法运算 四舍五入
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* @param d1
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* @param d2
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* @return
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*/
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public static double divide(String d1,String d2,int len) {// 进行除法运算
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BigDecimal b1 = new BigDecimal(d1);
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BigDecimal b2 = new BigDecimal(d2);
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return b1.divide(b2,len,BigDecimal.ROUND_HALF_UP).doubleValue();
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}
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/**
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* // 进行除法运算 四舍五入
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* @param d1
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* @param d2
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* @return
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*/
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public static BigDecimal divide(BigDecimal b1,BigDecimal b2,int len) {// 进行除法运算
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return b1.divide(b2, new MathContext(len));
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}
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public CommonUtils() {
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// TODO Auto-generated constructor stub
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}
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/*
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*
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* 按指定长度截取源字符串，若源字符串不大于指定长度，则原样返回
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*/
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public static String cutString(String res, Integer length, String suffix) {
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if (StringUtils.isEmpty(res)) {
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return "";
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}
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if (res.length() <= length) {
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return res;
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}
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return res.substring(0, length) + (suffix == null ? "" : suffix);
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}
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/**
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* 生成流水号 ： module+时间戳 + 5位随机数，长度20位
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*/
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public static String generateNo(String module){
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Random rand = new Random();
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String random = String.valueOf(rand.nextInt(100000));
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int index = 0;
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while( random.length() < 5 && index < 5 ){
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index++;
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random = "0".concat(random);
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}
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return module + System.currentTimeMillis() + random ;
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}
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/**
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* 计算单位数字
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*
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* @param number
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* @return
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*/
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public static String getNumberByUnit(BigInteger number){
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if(number == null){
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return "0";
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}
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if(number.compareTo(new BigInteger("10000")) < 0){// 小于1万
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return String.valueOf(number);
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}
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if(number.compareTo(new BigInteger("10000")) >= 0
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&& number.compareTo(new BigInteger("100000000")) < 0){// 大于1万 小于一亿 前进1位为1.2万
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return Math.ceil(number.doubleValue()/1000)/10 + "万";
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}
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if(number.compareTo(new BigInteger("100000000")) >= 0){// 大于一亿 前进1位为1.2亿
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return Math.ceil(number.doubleValue()/1000000)/10 + "亿";
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}
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return "0";
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}
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/**
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* 格式化文本
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* @param str
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* @return
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*/
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public static String formatText(String str){
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String text = str;
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if (StringUtils.isNotBlank(str)) {
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text = text.replace("\n", "<br/>");
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}
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return text;
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}
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//
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private static double rad(double d){
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return d * Math.PI / 180.0;
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}
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//获取两个坐标距离
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public static double GetDistance(double long1, double lat1, double long2, double lat2) {
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double a, b, d, sa2, sb2;
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double latA = rad(lat1);
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double latB = rad(lat2);
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a = latA - latB;
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b = rad(long1 - long2);
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sa2 = Math.sin(a / 2.0);
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sb2 = Math.sin(b / 2.0);
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d = 2 * EARTH_RADIUS
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* Math.asin(Math.sqrt(sa2 * sa2 + Math.cos(latA)
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* Math.cos(latB) * sb2 * sb2));
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return d;
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}
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/**
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* 银行卡验证
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*
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* @param cardNo
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* @return
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*/
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public static boolean isBankCard(String cardNo){
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return Pattern.matches("^\\d{8,27}$", cardNo);
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}
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/**
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* ftl-返回错误信息页面
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* @param mv
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* @param msg
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* @return
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*/
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public static ModelAndView resultDeletePage(ModelAndView mv,String msg){
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mv = new ModelAndView("/deletePage");
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mv.addObject("content", msg);
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return mv;
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}
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/** 得到classId*/
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public static String getClassId(String classId){
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return StringUtils.isEmpty(classId)?(StringUtils.isEmpty(ClientUtils.getClassId())?StringUtils.EMPTY:ClientUtils.getClassId()):classId;
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}
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}
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