String 共通方法定义

package com.*.util.string;import java.lang.reflect.Method;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Random;import org.apache.commons.lang.StringUtils;/** * the StringUtil class *  * @author brian *  */public class StringUtil {/** * 空字符串 */private static final String EMPTY_STR = "";/** * 分隔符 */private static final String SEP = ",";/** * 将为NULL的String设置为空串。 *  * @param str *            字符串 * @return String */public static String trimNull(String str) {return str == null ? EMPTY_STR : str;}/** * 将Object(MAP)中所有字符串类型字段为NULL的设置为空串。 *  * @param o *            Object（Map） */public static void removeNullString(Object o) {Class oclass = o.getClass();Method[] methods = oclass.getMethods();Map<String, Method> map = new HashMap<String, Method>();for (int i = 0; i < methods.length; i++) {Method method = methods[i];String methodName = method.getName();if (methodName.substring(0, 3).compareToIgnoreCase("set") == 0) {Class p[] = method.getParameterTypes();if (p.length == 1 && p[0].equals(String.class)) {map.put(methodName.substring(3), method);}}}for (int i = 0; i < methods.length; i++) {Method method = methods[i];String methodName = method.getName();if (methodName.substring(0, 3).compareToIgnoreCase("get") == 0) {Class p[] = method.getParameterTypes();if (p.length == 0) {try {if (method.invoke(o) == null) {Method setMethod = map.get(methodName.substring(3));if (setMethod != null) {setMethod.invoke(o, "");}}} catch (Exception e) {e.printStackTrace();}}}}}/** * 判断字符串是否为NULL和空串。 *  * @param str *            字符串 * @return boolean */public static boolean isEmpty(String str) {return !notEmpty(str);}/** * 判断字符串是否不为NULL和空串。 *  * @param str *            字符串 * @return boolean */public static boolean notEmpty(String str) {return str != null && !str.trim().isEmpty();}/** * 把一个list里面的所有str元素用提供的分隔符参数分开。 * <p> * list为空，则返回一个空串。 *  * @param list *            是Map的集合 * @param sep *            length必须等于1 * @param key *            是HMap中的id的key * @return String */public static String listToString(List list, String sep, String key) {StringBuffer sb = new StringBuffer();Object obj;Class clz;if(sep == null || sep.length()!= 1) {sep = SEP;}if(key == null || key.trim().length() <= 0) {clz = String.class;} else {clz = Map.class;}for (Iterator it = list.iterator(); it.hasNext();) {if(clz.equals(String.class)){obj =  it.next();}else{obj = ((Map) it.next()).get(key);}sb.append(NVL(obj)).append(sep);}if (sb.length() > 0) {sb = sb.deleteCharAt(sb.length() - 1);}return sb.toString();}/** * 把一个list里面的所有str元素用提供的分隔符参数分开。 * <p> * list为空，则返回一个空串。 *  * @param list *            list * @param sep *            length必须等于1。 * @return String */public static String listToString(List list, String sep) {return listToString(list,sep,null);}/** * 把一个list里面的所有str元素用SEP分隔符分开。 * <p> * list为空，则返回一个空串。 *  * @param list *            list * @return String */public static String listToString(List list) {return listToString(list,SEP,null);}/** * 在str中去除list中的所有id. * <p> *  * @param str *            是用逗号分隔的ids。比如：1,2,3,4 * @param list *            是str的集合。 * @return String */public static String stringExcepList(String str, List list) {str = SEP + str + SEP;String s;for (Iterator it = list.iterator(); it.hasNext();) {s = (String) it.next();s = SEP + s + SEP;str = str.replace(s, SEP);}if (str.length() > 2) {str = str.substring(1, str.length() - 1);} else {str = "";}return str;}/** * 在str中去除list中的所有id. * <p> *  * @param str *            是用逗号分隔的ids。比如：1,2,3,4 * @param list *            是Map的集合。 * @param key *            是HMap中的id的key * @return String */public static String stringExcepList(String str, List list, String key) {str = SEP + str + SEP;Map hs;String s;for (Iterator it = list.iterator(); it.hasNext();) {hs = (Map) it.next();s = (String) hs.get(key);s = SEP + s + SEP;str = str.replace(s, SEP);}if (str.length() > 2) {str = str.substring(1, str.length() - 1);} else {str = "";}return str;}/** * 將用逗號分割的ids中每個id用引號括起來。 *  * @param ids *            ids * @return String */public static String makeOracleNumberIdsToString(String ids) {String ret = null;if (ids == null || ids.length() <= 0) {return ret;}ids = SEP + ids + SEP;ids = ids.replaceAll(",", "','");ret = ids.substring(2, ids.length() - 2);return ret;}public static String list2Ids(List<String> ids){String idstr = StringUtils.join(ids, SEP);return makeOracleNumberIdsToString(idstr);}public static String array2Ids(String[] ids){String idstr = StringUtils.join(ids, SEP);return makeOracleNumberIdsToString(idstr);}/** * 在已知ids后面增加id *  * @param ids *            ids * @param id *            id * @return String */public static String appendToIds(String ids, String id) {if (ids == null || ids.length() <= 0) {ids = id;} else {ids = ids + SEP + id;}return ids;}/** * fit dont asistant this character"〜" +301C so change 〜 +301c to ～ +ff5e *  * @param str *            str * @return String */public static String treatSpecialChar(String str) {if (str.indexOf(0x301C) >= 0) {str = str.replace((char) 0x301C, (char) 0xff5e);}return str;}/** * "A：xxx" ->"xxx" *  * @param area *            area * @return String */public static String formatAreaStr(String area) {if (area == null || area.equals("")) {return area;}if (area.indexOf("：") < 0) {return area;}area = area.substring(area.indexOf("：") + 1);return area;}/** * NVL *  * @param Object *            str * @return String */public static String NVL(Object str) {if (str == null) {return "";}return NVL(str.toString());}/** * NVL *  * @param str *            str * @return String */public static String NVL(String str) {if (str == null) {return "";}if (str.equals("null")) {return "";}if (str.equals("null|null")) {return "";}return str;}/** * 过滤HTML 及 脚本 * @param s * @return */public static String filterString(String s){s = s.replaceAll("<", "<").replaceAll(">", ">").replaceAll("&", "&").replaceAll("\"", """);return s;}public static boolean isTrue(String str) {try {return Boolean.parseBoolean(str);} catch (Exception e) {return false;}}public static Long toLong(String str) {if (isEmpty(str)) return null;try {return Long.parseLong(str);} catch (Exception e) {e.printStackTrace();return null;}}public static Long toLong(String str, Long defaultValue) {Long value = toLong(str);return value == null ? defaultValue : value;}public static String fetchRandomString() {SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssms");return sdf.format(new Date()) + new Random().nextInt(1000);}/** * 处理XML特殊字符 * @param text * @return */public static String transXMLText(String text){if(text!=null){return text.replaceAll("<","<").replaceAll(">",">").replaceAll("&","&").replaceAll("'","'").replaceAll("\"", """).trim();}return "";}public static String transTextXML(String text){if(text!=null){return text.replaceAll("<","<").replaceAll(">",">").replaceAll("&","&").replaceAll("'","'").replaceAll(""", "\"");}return "";}}