FormatUtil

package com.css.common.util;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * 用于操作字符串的工具类
 *
 * @version 1.0
 *
 */
public class FormatUtil {
 
 /**
  * 过滤空格
  * @param str
  * @return
  */
 public static String trim(String str) {
  String temp = "";
  if(str==null){
   return temp;
  }
  for (int i = 0; i < str.length(); i++) {
   temp = (new StringBuilder()).append(temp).append(str.substring(i, i + 1).trim()).toString();
  }
  return temp;
 }

 /**
  * 判断对象是否为空
  * @param str
  * @return
  */
 public static boolean isNotNull(Object str) {
  boolean b = false;
  if (str == null) {
   return b;
  }
  if (str instanceof String) {
   String value = str.toString();
   if (value != null && trim(value).length() > 0) {
    b = true;
   }
  } else if (str instanceof Double) {
   Double value = (Double) str;
   if (value != null && value.doubleValue() > 0) {
    b = true;
   }
  } else if (str instanceof Integer) {
   Integer value = (Integer) str;
   if (value != null && value.intValue() > 0) {
    b = true;
   }
  } else if (str instanceof Long) {
   Long value = (Long) str;
   if (value != null && value.longValue() > 0) {
    b = true;
   }
  } else if (str instanceof String[]) {
   String value[] = (String[]) str;
   if (value != null && value.length > 0) {
    b = true;
   }
  } else if (str instanceof Long[]) {
   Long value[] = (Long[]) str;
   if (value != null && value.length > 0) {
    b = true;
   }
  } else if (str instanceof Byte) {
   Byte value = (Byte) str;
   if (value != null && value.byteValue() > 0) {
    b = true;
   }
  } else if (str instanceof Map) {
   Map value = (Map) str;
   if (str != null && value.size() > 0) {
    b = true;
   }
  } else if (str instanceof List) {
   List value = (List) str;
   if (str != null && value.size() > 0) {
    b = true;
   }
  } else if (str != null) {
   b = true;
  }
  return b;
 }
 
 /**
     * Splits a string into substrings based on the supplied delimiter
     * character. Each extracted substring will be trimmed of leading
     * and trailing whitespace.
     *
     * @param str The string to split
     * @param delimiter The character that delimits the string
     * @return A string array containing the resultant substrings
     */
    public static final List split(String str, char delimiter) {
        // return no groups if we have an empty string
        if ((str == null) || "".equals(str)) {
            return new ArrayList();
        }

        ArrayList parts = new ArrayList();
        int currentIndex;
        int previousIndex = 0;

        while ((currentIndex = str.indexOf(delimiter, previousIndex)) > 0) {
            String part = str.substring(previousIndex, currentIndex).trim();
            parts.add(part);
            previousIndex = currentIndex + 1;
        }

        parts.add(str.substring(previousIndex, str.length()).trim());

        return parts;
    }

}