/* ==================================================================   
 * Created [2009-4-27 下午11:32:55] by Jon.King 
 * ==================================================================  
 * TSS 
 * ================================================================== 
 * mailTo:jinpujun@hotmail.com
 * Copyright (c) Jon.King, 2009-2012 
 * ================================================================== 
 */

package com.jinhe.tss.core.util;

import java.io.UnsupportedEncodingException;

import com.jinhe.tss.core.exception.BusinessException;

/**
 * 字符串工具类：
 * <li>字符串转码工具：将字符串的编码进行转换（默认为GBK转UTF-8）
 * </p>
 */
public class StringUtil {

    /**
     * <p>
     * 转换字符串编码方式
     * </p>
     * 
     * @param str
     * @param oldCharset
     * @param charset
     * @return
     */
    public static String convertCoding(String str, String oldCharset, String charset) {
        byte[] bytes;
        try {
            bytes = str.getBytes(oldCharset);
        } catch (UnsupportedEncodingException e1) {
            throw new BusinessException("字符串编码转换失败，不支持的编码方式：" + oldCharset, e1);
        }
        try {
            return new String(bytes, charset);
        } catch (UnsupportedEncodingException e) {
            throw new BusinessException("字符串编码转换失败，不支持的编码方式：" + charset, e);
        }
    }

    /**
     * GBK格式字符串转UTF-8格式
     */
    public static String gbk2Utf8(String str) {
        return convertCoding(str, "GBK", "UTF-8");
    }

    /**
     * UTF-8格式字符串转GBK格式
     */
    public static String utf82Gbk(String str) {
        return convertCoding(str, "UTF-8", "GBK");
    }

 
    public static void main(String[] args) {
        String str = "Portletyyy~!@#$%^&*()_+-=[]{}\\|;':\",./<>?原型实现模型訾鄣迂蟓";
 
        System.out.println(str);
        System.out.println(gbk2Utf8(utf82Gbk(str)));
        System.out.println(utf82Gbk(gbk2Utf8(str)));
    }

}