package com.moral.common.util;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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public class StringUtils {
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public static final char UNDERLINE = '_';
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/**
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* 驼峰格式字符串转换为下划线格式字符串
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*
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* @param param
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* @return
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*/
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public static String camelToUnderline(String param) {
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if (param == null || "".equals(param.trim())) {
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return "";
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}
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int len = param.length();
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StringBuilder sb = new StringBuilder(len);
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for (int i = 0; i < len; i++) {
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char c = param.charAt(i);
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if (Character.isUpperCase(c)) {
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sb.append(UNDERLINE);
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sb.append(Character.toLowerCase(c));
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} else {
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sb.append(c);
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}
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}
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return sb.toString();
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}
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/**
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* //首字母转大写
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*
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* @param s
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* @return
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*/
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public static String toUpperCaseFirstOne(String s){
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StringBuilder sb = new StringBuilder(s);
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sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
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return sb.toString();
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}
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public static boolean isNullOrEmpty(String toTest) {
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return toTest == null || toTest.length() == 0;
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}
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public static Object stringToObject4Type(Class<?> type,String value) throws Exception{
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Object result = value;
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if (type == double.class || type == Double.class) {
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result = Double.parseDouble(value);
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} else if (type == float.class || type == Float.class) {
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result = Float.parseFloat(value);
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} else if (type == long.class || type == Long.class) {
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result = Long.parseLong(value);
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} else if (type == int.class || type == Integer.class) {
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result = Integer.parseInt(value);
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} else if (type == short.class || type == Short.class) {
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result = Short.parseShort(value);
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} else if (type == boolean.class || type == Boolean.class) {
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result = Boolean.parseBoolean(value);
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} else if (type == Date.class) {
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value = value.replace("T", " ");
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SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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try {
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result = df.parse(value);
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} catch (Exception e) {
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df = new SimpleDateFormat("yyyy-MM-dd HH:mm");
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try {
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result = df.parse(value);
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} catch (ParseException e1) {
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df = new SimpleDateFormat("yyyy-MM-dd");
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try {
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result = df.parse(value);
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} catch (ParseException e2) {
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}
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}
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}
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}
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return result;
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}
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/**
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* 中英文字符长度控制
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* @param str
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* @param maxLength
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* @return
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*/
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public static String subStringCN(final String str, final int maxLength) {
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if (str == null) {
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return str;
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}
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String suffix = "...";
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int suffixLen = suffix.length();
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final StringBuffer sbuffer = new StringBuffer();
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final char[] chr = str.trim().toCharArray();
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int len = 0;
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for (int i = 0; i < chr.length; i++) {
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if (chr[i] >= 0xa1) {
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len += 2;
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} else {
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len++;
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}
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}
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if(len<=maxLength){
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return str;
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}
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len = 0;
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for (int i = 0; i < chr.length; i++) {
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if (chr[i] >= 0xa1) {
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len += 2;
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if (len + suffixLen > maxLength) {
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break;
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}else {
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sbuffer.append(chr[i]);
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}
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} else {
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len++;
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if (len + suffixLen > maxLength) {
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break;
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}else {
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sbuffer.append(chr[i]);
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}
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}
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}
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sbuffer.append(suffix);
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return sbuffer.toString();
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}
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public static boolean isNumericZidai(String str) {
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for (int i = 0; i < str.length(); i++) {
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System.out.println(str.charAt(i));
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if (!Character.isDigit(str.charAt(i))) {
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return false;
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}
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}
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return true;
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}
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}
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