StringUtil

import java.util.Arrays;import java.util.Collections;import java.util.List;/** * 字符串工具类 *  */public class StringUtil {public static final String CHARSET_NAME = "UTF-8";/** * 根据传入的字符串生成字符串集合 *  * @param val * @return List<String> */@SuppressWarnings("unchecked")public static List<String> stringToList(String val) {if (val != null) {String[] list = val.split("[ ]*,[ ]*");return Arrays.asList(list);} else {return Collections.EMPTY_LIST;}}/** * 转换对象为字符串,如果对象为空，返回为"" *  * @param obj *            Object * @return String */public static String nvl(Object obj) {if (obj == null) {return "";}if (obj instanceof String) {return (String) obj;}return obj.toString();}/** * 检查字符串是否不为空 *  * @param obj *            a string to check * @return true if the string is not empty */public static boolean isNotBlank(Object obj) {if (!nvl(obj).trim().equals("")) {return true;}return false;}/** * 检查字符串是否为空 *  * @param obj *            a string to check * @return true if the string is empty */public static boolean isBlank(Object obj) {return !isNotBlank(obj);}/** * 计算中文字的个数 *  * @author tyun * @since 2012/12/20 */public static int chineseCount(String word) {int v = 0;char c;for (int cc = 0; cc < word.length(); cc++) {c = word.charAt(cc);if (!(c >= 32 && c <= 126))v++;}return v;}/** * 首字符前面补空格 *  * @param val *            值 * @param length *            补足长度 * @return String */public static String padLeftSpace(String val, int length) {return padSpace(val, length, CHARSET_NAME, true);}/** * 尾数后补空格 *  * @param val *            值 * @param length *            补足长度 * @return String */public static String padRightSpace(String val, int length) {return padSpace(val, length, CHARSET_NAME, false);}/** * 字符串添加空格 *  * @param val *            值 * @param length *            变换int用文字数生成 * @param charsetName *            编码格式 * @param isLeft *            true：左边补空格（首字符前），false：右边补空格（尾数后） * @return String */public static String padSpace(String val, int length, String charsetName,boolean isLeft) {if (val == null) {return "";}int num = 0;String sRet = "";try {num = length - val.getBytes(charsetName).length;if (num <= 0) {return val;}StringBuffer result = new StringBuffer();for (int i = 0; i < num; i++) {result.append((char) 32);}if (isLeft == true) {sRet = result.toString() + val;} else {sRet = val + result.toString();}} catch (Exception e) {e.printStackTrace();}return sRet;}/** * 首字符前面补0 *  * @param val *            值 * @param length *            补足长度 * @return String */public static String padLeftZero(String val, int length) {return padZero(val, length, CHARSET_NAME, true);}/** * 字符串添加0 *  * @param val *            值 * @param length *            变换int用文字数生成 * @param charsetName *            编码格式 * @param isLeft *            true：左边补0（首字符前），false：右边补0（尾数后） * @return String */public static String padZero(String val, int length, String charsetName,boolean isLeft) {if (val == null) {return "";}int num = 0;String sRet = "";try {num = length - val.getBytes(charsetName).length;if (num <= 0) {return val;}StringBuffer result = new StringBuffer();for (int i = 0; i < num; i++) {result.append((char) 48);}if (isLeft == true) {sRet = result.toString() + val;} else {sRet = val + result.toString();}} catch (Exception e) {e.printStackTrace();}return sRet;}/** * 计算字符串的长度. 一个字符长度为1，一个汉字的长度为2. *  * @param String * @return int */public static int lengthOfString(String value) {if (value == null)return 0;StringBuffer buff = new StringBuffer(value);int length = 0;String stmp;for (int i = 0; i < buff.length(); i++) {stmp = buff.substring(i, i + 1);try {stmp = new String(stmp.getBytes(CHARSET_NAME));} catch (Exception e) {e.printStackTrace();}if (stmp.getBytes().length > 1) {length += 2;} else {length += 1;}}return length;}/** * 将字符串转为整型字符串 *  * @param value * @return */public static String str2IntStr(String value) {int iRet = 0;try {value = isBlank(value) ? "0" : value;iRet = Integer.parseInt(value);} catch (Exception e) {e.printStackTrace();}return "" + iRet;}/** * 判断字符串是否仅含英文或数字，不含中文 *  * @param val * @return */public static boolean isEnglish(String val) {if (isBlank(val)) {return false;}return val.getBytes().length == val.length();}}