java实现字符串和数字转换工具

本文实例为大家分享了java字符串和数字转换工具的具体代码，供大家参考，具体内容如下

package com.test.util;


public class NumberUtil {

 
 public static String num2Str(Object num) {
  String str = null;

  if (num == null) {
   str = "";
  }
  else {
   str = String.valueOf(num);
  }
  return str;
 }

 
 public static Integer getInteger(Object obj) {
  return getInteger(obj, 0);
 }

 
 public static Integer getInteger(Object obj, int def) {
  String str = obj == null ? "" : obj.toString();

  Integer i = null;

  if (str.trim().length() == 0) {
   i = new Integer(def);
  }
  else {
   try {
    i = Integer.valueOf(str);
   }
   catch (Exception e) {
   }
  }

  return i == null ? new Integer(def) : i;
 }

 
 public static Long getLong(Object obj) {
  return getLong(obj, 0);
 }

 
 public static Long getLong(Object obj, long def) {
  String str = obj == null ? "" : obj.toString();

  Long l = null;

  if (str.trim().length() == 0) {
   l = new Long(def);
  }
  else {
   try {
    l = Long.valueOf(str);
   }
   catch (Exception e) {
   }
  }

  return l == null ? new Long(def) : l;
 }

 
 public static int getIntegerValue(Object obj) {
  return getIntegerValue(obj, 0);
 }

 
 public static int getIntegerValue(Object obj, int def) {
  return getInteger(obj, def).intValue();
 }

 
 public static long getLongValue(Object obj) {
  return getLongValue(obj, 0);
 }

 
 public static long getLongValue(Object obj, long def) {
  return getLong(obj, def).longValue();
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。