Java常用工具类---字符编码工具类、数据类型转换工具类

偏执的太偏执、 2022-01-29 10:07 633阅读 0赞

package com.jarvis.base.util;
 
 import java.io.UnsupportedEncodingException;
 
 /**
 * 
 * Title:字符编码工具类
 * 
 * 
 * Description:
 * 
 * 
 * Copyright: Copyright (c) 2007
 * 
 * 
 * Company:
 * 
 * 
 * @author:
 * @version 1.0
 */
 public class CharTools {
 
 	/**
 	 * 转换编码 ISO-8859-1到GB2312
 	 * 
 	 * @param text
 	 * @return
 	 */
 	public static final String ISO2GB(String text) {
 		String result = "";
 		try {
 			result = new String(text.getBytes("ISO-8859-1"), "GB2312");
 		} catch (UnsupportedEncodingException ex) {
 			result = ex.toString();
 		}
 		return result;
 	}
 
 	/**
 	 * 转换编码 GB2312到ISO-8859-1
 	 * 
 	 * @param text
 	 * @return
 	 */
 	public static final String GB2ISO(String text) {
 		String result = "";
 		try {
 			result = new String(text.getBytes("GB2312"), "ISO-8859-1");
 		} catch (UnsupportedEncodingException ex) {
 			ex.printStackTrace();
 		}
 		return result;
 	}
 
 	/**
 	 * Utf8URL编码
 	 * 
 	 * @param s
 	 * @return
 	 */
 	public static final String Utf8URLencode(String text) {
 		StringBuffer result = new StringBuffer();
 
 		for (int i = 0; i < text.length(); i++) {
 
 			char c = text.charAt(i);
 			if (c >= 0 && c <= 255) {
 				result.append(c);
 			} else {
 
 				byte[] b = new byte[0];
 				try {
 					b = Character.toString(c).getBytes("UTF-8");
 				} catch (Exception ex) {
 				}
 
 				for (int j = 0; j < b.length; j++) {
 					int k = b[j];
 					if (k < 0)
 						k += 256;
 					result.append("%" + Integer.toHexString(k).toUpperCase());
 				}
 
 			}
 		}
 
 		return result.toString();
 	}
 
 	/**
 	 * Utf8URL解码
 	 * 
 	 * @param text
 	 * @return
 	 */
 	public static final String Utf8URLdecode(String text) {
 		String result = "";
 		int p = 0;
 
 		if (text != null && text.length() > 0) {
 			text = text.toLowerCase();
 			p = text.indexOf("%e");
 			if (p == -1)
 				return text;
 
 			while (p != -1) {
 				result += text.substring(0, p);
 				text = text.substring(p, text.length());
 				if (text == "" || text.length() < 9)
 					return result;
 
 				result += CodeToWord(text.substring(0, 9));
 				text = text.substring(9, text.length());
 				p = text.indexOf("%e");
 			}
 
 		}
 
 		return result + text;
 	}
 
 	/**
 	 * utf8URL编码转字符
 	 * 
 	 * @param text
 	 * @return
 	 */
 	private static final String CodeToWord(String text) {
 		String result;
 
 		if (Utf8codeCheck(text)) {
 			byte[] code = new byte[3];
 			code[0] = (byte) (Integer.parseInt(text.substring(1, 3), 16) - 256);
 			code[1] = (byte) (Integer.parseInt(text.substring(4, 6), 16) - 256);
 			code[2] = (byte) (Integer.parseInt(text.substring(7, 9), 16) - 256);
 			try {
 				result = new String(code, "UTF-8");
 			} catch (UnsupportedEncodingException ex) {
 				result = null;
 			}
 		} else {
 			result = text;
 		}
 
 		return result;
 	}
 
 	/**
 	 * 编码是否有效
 	 * 
 	 * @param text
 	 * @return
 	 */
 	@SuppressWarnings("unused")
 	private static final boolean Utf8codeCheck(String text) {
 		String sign = "";
 		if (text.startsWith("%e"))
 			for (int i = 0, p = 0; p != -1; i++) {
 				p = text.indexOf("%", p);
 				if (p != -1)
 					p++;
 				sign += p;
 			}
 		return sign.equals("147-1");
 	}
 
 	/**
 	 * 判断是否Utf8Url编码
 	 * 
 	 * @param text
 	 * @return
 	 */
 	public static final boolean isUtf8Url(String text) {
 		text = text.toLowerCase();
 		int p = text.indexOf("%");
 		if (p != -1 && text.length() - p > 9) {
 			text = text.substring(p, p + 9);
 		}
 		return Utf8codeCheck(text);
 	}
 
 	/**
 	 * 测试
 	 * 
 	 * @param args
 	 */
 	public static void main(String[] args) {
 
 		// CharTools charTools = new CharTools();
 
 		String url;
 
 		url = "http://www.google.com/search?hl=zh-CN&newwindow=1&q=%E4%B8%AD%E5%9B%BD%E5%A4%A7%E7%99%BE%E7%A7%91%E5%9C%A8%E7%BA%BF%E5%85%A8%E6%96%87%E6%A3%80%E7%B4%A2&btnG=%E6%90%9C%E7%B4%A2&lr=";
 		if (CharTools.isUtf8Url(url)) {
 			System.out.println(CharTools.Utf8URLdecode(url));
 		} else {
 			// System.out.println(URLDecoder.decode(url));
 		}
 
 		url = "http://www.baidu.com/baidu?word=%D6%D0%B9%FA%B4%F3%B0%D9%BF%C6%D4%DA%CF%DF%C8%AB%CE%C4%BC%EC%CB%F7&tn=myie2dg";
 		if (CharTools.isUtf8Url(url)) {
 			System.out.println(CharTools.Utf8URLdecode(url));
 		} else {
 			// System.out.println(URLDecoder.decode(url));
 		}
 
 	}
 
 }
 
 
 
 
 
 package com.jarvis.base.util;
 
 import java.util.List;
 
 /** 
 * @Title: ConvertHelper.java 
 * @Package com.jarvis.base.util 
 * @Description:数据类型转换
 * @version V1.0 
 */ 
 public class ConvertHelper
 {
 	/**
 	 * 把字串转化为整数,若转化失败，则返回0
 	 *
 	 * @param str
 	 * 字串
 	 * @return
 	 */
 	public static int strToInt(String str) {
 		if (str == null) {
 			return 0;
 		}
 
 		try {
 			return Integer.parseInt(str);
 		} catch (Exception ex) {
 			ex.printStackTrace();
 			System.err.println(str + "转换成int类型失败，请检查数据来源");
 		}
 		return 0;
 	}
 
 	/**
 	 * 把字串转化为长整型数,若转化失败，则返回0
 	 *
 	 * @param str
 	 * 要转化为长整型的字串
 	 * @return
 	 */
 	public static long strToLong(String str) {
 		if (str == null) {
 			return 0;
 		}
 
 		try {
 			return Long.parseLong(str);
 		} catch (Exception ex) {
 			ex.printStackTrace();
 			System.err.println(str + "转换成long类型失败，请检查数据来源");
 		}
 		return 0;
 	}
 
 	/**
 	 * 把字串转化为Float型数据,若转化失败，则返回0
 	 *
 	 * @param str
 	 * 要转化为Float的字串
 	 * @return
 	 */
 	public static float strToFloat(String str) {
 		if (str == null) {
 			return 0;
 		}
 		try {
 			return Float.parseFloat(str);
 		} catch (Exception ex) {
 			ex.printStackTrace();
 			System.err.println(str + "转换成float类型失败，请检查数据来源");
 		}
 		return 0;
 	}
 
 	/**
 	 * 把字串转化为Double型数据，若转化失败，则返回0
 	 * 
 	 * @param str
 	 * 要转化为Double的字串
 	 * @return
 	 */
 	public static double strToDouble(String str) {
 		if (str == null) {
 			return 0;
 		}
 		try {
 			return Double.parseDouble(str);
 		} catch (Exception ex) {
 			ex.printStackTrace();
 			System.err.println(str + "转换成double类型失败，请检查数据来源");
 		}
 		return 0;
 	}
 
 	/**
 	 * 描述：字符转为一个元素的Object数组
 	 * 
 	 * @param str
 	 * @return
 	 */
 	public static Object[] strToArry(String str) {
 		if (str == null) {
 			return null;
 		} else {
 			return new Object[] { str };
 		}
 	}
 
 	/**
 	 * 对于一个字符串数组，把字符串数组中的每一个字串转换为整数。 返回一个转换后的整型数组，对于每一个字串若转换失败，则对 应的整型值就为0
 	 *
 	 * @param strArray
 	 * 要转化的数组
 	 * @return
 	 */
 	public static int[] strArrayToIntArray(String[] strArray) {
 		int[] intArray = new int[strArray.length];
 		for (int i = 0; i < strArray.length; i++) {
 			intArray[i] = strToInt(strArray[i]);
 		}
 		return intArray;
 	}
 
 	/**
 	 * 描述：数组转换为字符串
 	 * 
 	 * @param arg0
 	 * 数组
 	 * @return
 	 */
 	public static String arrToString(Object[] arg0) {
 		if (arg0 == null) {
 			return "";
 		}
 		return arrToString(arg0, ",");
 	}
 
 	/**
 	 * 描述：数据转换为字符串
 	 * 
 	 * @param arg0
 	 * 数组
 	 * @param arg1
 	 * 取数组个数
 	 * @return
 	 */
 	public static String arrToString(Object[] arg0, int arg1) {
 		if (arg0 == null) {
 			return "";
 		}
 		return arrToString(arg0, ",", arg1);
 	}
 
 	/**
 	 * 描述：数据转换为字符串
 	 * 
 	 * @param arg0
 	 * 数组
 	 * @param arg1
 	 * 间隔符号
 	 * @return
 	 */
 	public static String arrToString(Object[] arg0, String arg1) {
 		return arrToString(arg0, arg1, 0);
 	}
 
 	/**
 	 * 描述：数据转换为字符串
 	 * 
 	 * @param arg0
 	 * 数组
 	 * @param arg1
 	 * 间隔符号
 	 * @param arg2
 	 * 取数组个数
 	 * @return
 	 */
 	public static String arrToString(Object[] arg0, String arg1, int arg2) {
 		if (arg0 == null || arg0.length == 0) {
 			return "";
 		} else {
 			StringBuffer sb = new StringBuffer();
 			int length = arg0.length;
 			if (arg2 != 0) {
 				length = arg2;
 			}
 			for (int i = 0; i < length; i++) {
 				if (arg1 == null)
 					arg1 = "";
 				sb.append(arg0[i]).append(arg1);
 			}
 			sb.delete(sb.lastIndexOf(arg1), sb.length());
 			return sb.toString();
 		}
 	}
 
 	/**
 	 * 描述：List转换为字符串
 	 * 
 	 * @param list
 	 * List数据
 	 * @param separation
 	 * 间隔符
 	 * @return
 	 */
 	public static String listToString(List<?> list) {
 		return listToString(list, ",");
 	}
 
 	/**
 	 * 描述：List转换为字符串
 	 * 
 	 * @param list
 	 * List数据
 	 * @param separation
 	 * 间隔符
 	 * @return
 	 */
 	public static String listToString(List<?> list, String separation) {
 		return arrToString(listToStringArray(list), separation);
 	}
 
 	/**
 	 * 描述：字串数据元素包装
 	 * 
 	 * @param sArr
 	 * 字串数据
 	 * @param pre
 	 * 前缀
 	 * @param aft
 	 * 后缀
 	 * @return
 	 */
 	public static String[] strArrDoPack(String[] sArr, String pre, String aft) {
 		return strArrDoPack(sArr, pre, aft, 1, 0);
 	}
 
 	/**
 	 * 描述：字串数据元素包装
 	 * 
 	 * @param sArr
 	 * 字串数据
 	 * @param pre
 	 * 前缀
 	 * @param aft
 	 * 后缀
 	 * @param num
 	 * 生成个数
 	 * @return
 	 */
 	public static String[] strArrDoPack(String[] sArr, String pre, String aft, int num) {
 		return strArrDoPack(sArr, pre, aft, num, 0);
 	}
 
 	/**
 	 * 描述：字串数据元素包装
 	 * 
 	 * @param sArr
 	 * 字串数据
 	 * @param pre
 	 * 前缀
 	 * @param aft
 	 * 后缀
 	 * @param num
 	 * 生成个数
 	 * @param step
 	 * 数字值1：加，-1：减，0：不变
 	 * @return
 	 */
 	public static String[] strArrDoPack(String[] sArr, String pre, String aft, int num, int step) {
 		String[] arr = null;
 		if (sArr != null) {
 			boolean isAdd = false;
 			if (step > 0) {
 				isAdd = true;
 			}
 
 			if (num < 0) {
 				num = 1;
 			}
 
 			arr = new String[sArr.length * num];
 			int icount = 0;
 			for (int i = 0; i < num; i++) {
 				for (int j = 0; j < sArr.length; j++) {
 					if (StringHelper.isNotEmpty(pre)) {
 						arr[icount] = pre + sArr[j];
 					}
 					if (StringHelper.isNotEmpty(aft)) {
 						arr[icount] += aft;
 					}
 					icount++;
 				}
 
 				boolean b = false;
 				if (step != 0) {
 					pre = stepNumInStr(pre, isAdd);
 					b = true;
 				}
 				if (!b) {
 					if (step != 0) {
 						aft = stepNumInStr(aft, isAdd);
 					}
 				}
 			}
 
 		}
 		return arr;
 	}
 
 	/**
 	 * 描述：生成字符串
 	 * 
 	 * @param arg0
 	 * 字符串元素
 	 * @param arg1
 	 * 生成个数
 	 * @return
 	 */
 	public static String createStr(String arg0, int arg1) {
 		if (arg0 == null) {
 			return "";
 		}
 		return createStr(arg0, arg1, ",");
 	}
 
 	/**
 	 * 描述：生成字符串
 	 * 
 	 * @param arg0
 	 * 字符串元素
 	 * @param arg1
 	 * 生成个数
 	 * @param arg2
 	 * 间隔符号
 	 * @return
 	 */
 	public static String createStr(String arg0, int arg1, String arg2) {
 		if (arg0 == null) {
 			return "";
 		} else {
 			StringBuffer sb = new StringBuffer();
 			for (int i = 0; i < arg1; i++) {
 				if (arg2 == null)
 					arg2 = "";
 				sb.append(arg0).append(arg2);
 			}
 			if (sb.length() > 0) {
 				sb.delete(sb.lastIndexOf(arg2), sb.length());
 			}
 
 			return sb.toString();
 		}
 	}
 
 	/**
 	 * 描述：生成字符串数据
 	 * 
 	 * @param arg0
 	 * 字符串元素
 	 * @param arg1
 	 * 生成个数
 	 * @param arg2
 	 * 间隔符号
 	 * @return
 	 */
 	public static String[] createStrArr(String arg0, int arg1) {
 		if (arg0 == null) {
 			return null;
 		} else {
 			String[] arr = new String[arg1];
 			for (int i = 0; i < arg1; i++) {
 				arr[i] = arg0;
 			}
 
 			return arr;
 		}
 	}
 
 	/**
 	 * 描述：只保留字符串的英文字母和“_”号
 	 * 
 	 * @param str
 	 * @return
 	 */
 	public static String replaceAllSign(String str) {
 		if (str != null && str.length() > 0) {
 			str = str.replaceAll("[^a-zA-Z_]", "");
 		}
 		return str;
 	}
 
 	/**
 	 * 描述：字串中的数字值加1
 	 * 
 	 * @param str
 	 * 字串
 	 * @param isAdd
 	 * 数字值true：加，false：减
 	 * @return
 	 */
 	public static String stepNumInStr(String str, boolean isAdd) {
 		String sNum = str.replaceAll("[^0-9]", ",").trim();
 		if (sNum == null || sNum.length() == 0) {
 			return str;
 		}
 		String[] sNumArr = sNum.split(",");
 
 		for (int i = 0; i < sNumArr.length; i++) {
 			if (sNumArr[i] != null && sNumArr[i].length() > 0) {
 				int itemp = Integer.parseInt(sNumArr[i]);
 				if (isAdd) {
 					itemp += 1;
 				} else {
 					itemp -= 1;
 				}
 				str = str.replaceFirst(sNumArr[i], String.valueOf(itemp));
 				break;
 			}
 		}
 
 		return str;
 	}
 
 	/**
 	 * 描述：list 转换为 String[]
 	 * 
 	 * @param list
 	 * @return
 	 */
 	public static String[] listToStringArray(List<?> list) {
 		if (list == null || list.size() == 0) {
 			return null;
 		}
 		return (String[]) list.toArray(new String[list.size()]);
 	}
 
 }