分享万能java字符串编码转换工具类

女爷i 2022-08-22 11:29 238阅读 0赞

原文：[分享万能java字符串编码转换工具类][java]

源代码下载地址：[http://www.zuidaima.com/share/1795356301560832.htm][java]

package com.zuidaima.util;
    
    import java.io.UnsupportedEncodingException;
    
    /**
     * 转换字符串的编码
     */
    public class ChangeCharset {
    	/** 7位ASCII字符，也叫作ISO646-US、Unicode字符集的基本拉丁块 */
    	public static final String US_ASCII = "US-ASCII";
    
    	/** ISO 拉丁字母表 No.1，也叫作 ISO-LATIN-1 */
    	public static final String ISO_8859_1 = "ISO-8859-1";
    
    	/** 8 位 UCS 转换格式 */
    	public static final String UTF_8 = "UTF-8";
    
    	/** 16 位 UCS 转换格式，Big Endian（最低地址存放高位字节）字节顺序 */
    	public static final String UTF_16BE = "UTF-16BE";
    
    	/** 16 位 UCS 转换格式，Little-endian（最高地址存放低位字节）字节顺序 */
    	public static final String UTF_16LE = "UTF-16LE";
    
    	/** 16 位 UCS 转换格式，字节顺序由可选的字节顺序标记来标识 */
    	public static final String UTF_16 = "UTF-16";
    
    	/** 中文超大字符集 */
    	public static final String GBK = "GBK";
    
    	/**
    	 * 将字符编码转换成US-ASCII码
    	 */
    	public String toASCII(String str) throws UnsupportedEncodingException {
    		return this.changeCharset(str, US_ASCII);
    	}
    
    	/**
    	 * 将字符编码转换成ISO-8859-1码
    	 */
    	public String toISO_8859_1(String str) throws UnsupportedEncodingException {
    		return this.changeCharset(str, ISO_8859_1);
    	}
    
    	/**
    	 * 将字符编码转换成UTF-8码
    	 */
    	public String toUTF_8(String str) throws UnsupportedEncodingException {
    		return this.changeCharset(str, UTF_8);
    	}
    
    	/**
    	 * 将字符编码转换成UTF-16BE码
    	 */
    	public String toUTF_16BE(String str) throws UnsupportedEncodingException {
    		return this.changeCharset(str, UTF_16BE);
    	}
    
    	/**
    	 * 将字符编码转换成UTF-16LE码
    	 */
    	public String toUTF_16LE(String str) throws UnsupportedEncodingException {
    		return this.changeCharset(str, UTF_16LE);
    	}
    
    	/**
    	 * 将字符编码转换成UTF-16码
    	 */
    	public String toUTF_16(String str) throws UnsupportedEncodingException {
    		return this.changeCharset(str, UTF_16);
    	}
    
    	/**
    	 * 将字符编码转换成GBK码
    	 */
    	public String toGBK(String str) throws UnsupportedEncodingException {
    		return this.changeCharset(str, GBK);
    	}
    
    	/**
    	 * 字符串编码转换的实现方法
    	 * 
    	 * @param str
    	 *            待转换编码的字符串
    	 * @param newCharset
    	 *            目标编码
    	 * @return
    	 * @throws UnsupportedEncodingException
    	 */
    	public String changeCharset(String str, String newCharset)
    			throws UnsupportedEncodingException {
    		if (str != null) {
    			// 用默认字符编码解码字符串。
    			byte[] bs = str.getBytes();
    			// 用新的字符编码生成字符串
    			return new String(bs, newCharset);
    		}
    		return null;
    	}
    
    	/**
    	 * 字符串编码转换的实现方法
    	 * 
    	 * @param str
    	 *            待转换编码的字符串
    	 * @param oldCharset
    	 *            原编码
    	 * @param newCharset
    	 *            目标编码
    	 * @return
    	 * @throws UnsupportedEncodingException
    	 */
    	public String changeCharset(String str, String oldCharset, String newCharset)
    			throws UnsupportedEncodingException {
    		if (str != null) {
    			// 用旧的字符编码解码字符串。解码可能会出现异常。
    			byte[] bs = str.getBytes(oldCharset);
    			// 用新的字符编码生成字符串
    			return new String(bs, newCharset);
    		}
    		return null;
    	}
    
    	public static void main(String[] args) throws UnsupportedEncodingException {
    		ChangeCharset test = new ChangeCharset();
    		String str = "This is a 中文的 String!";
    		System.out.println("str: " + str);
    		String gbk = test.toGBK(str);
    		System.out.println("转换成GBK码: " + gbk);
    		System.out.println();
    		String ascii = test.toASCII(str);
    		System.out.println("转换成US-ASCII码: " + ascii);
    		gbk = test.changeCharset(ascii, ChangeCharset.US_ASCII,
    				ChangeCharset.GBK);
    		System.out.println("再把ASCII码的字符串转换成GBK码: " + gbk);
    		System.out.println();
    		String iso88591 = test.toISO_8859_1(str);
    		System.out.println("转换成ISO-8859-1码: " + iso88591);
    		gbk = test.changeCharset(iso88591, ChangeCharset.ISO_8859_1,
    				ChangeCharset.GBK);
    		System.out.println("再把ISO-8859-1码的字符串转换成GBK码: " + gbk);
    		System.out.println();
    		String utf8 = test.toUTF_8(str);
    		System.out.println("转换成UTF-8码: " + utf8);
    		gbk = test.changeCharset(utf8, ChangeCharset.UTF_8, ChangeCharset.GBK);
    		System.out.println("再把UTF-8码的字符串转换成GBK码: " + gbk);
    		System.out.println();
    		String utf16be = test.toUTF_16BE(str);
    		System.out.println("转换成UTF-16BE码:" + utf16be);
    		gbk = test.changeCharset(utf16be, ChangeCharset.UTF_16BE,
    				ChangeCharset.GBK);
    		System.out.println("再把UTF-16BE码的字符串转换成GBK码: " + gbk);
    		System.out.println();
    		String utf16le = test.toUTF_16LE(str);
    		System.out.println("转换成UTF-16LE码:" + utf16le);
    		gbk = test.changeCharset(utf16le, ChangeCharset.UTF_16LE,
    				ChangeCharset.GBK);
    		System.out.println("再把UTF-16LE码的字符串转换成GBK码: " + gbk);
    		System.out.println();
    		String utf16 = test.toUTF_16(str);
    		System.out.println("转换成UTF-16码:" + utf16);
    		gbk = test.changeCharset(utf16, ChangeCharset.UTF_16LE,
    				ChangeCharset.GBK);
    		System.out.println("再把UTF-16码的字符串转换成GBK码: " + gbk);
    		String s = new String("中文".getBytes("UTF-8"), "UTF-8");
    		System.out.println(s);
    	}
    }

输出结果：

![20140425163321343.jpg][]

另外关于java字符编码可以参考这个帖子:[Java编码浅析（注意区分三个概念）][Java]

[java]: http://www.zuidaima.com/share/1795356301560832.htm
[20140425163321343.jpg]: http://static.zuidaima.com/images/1/201404/20140425163321343.jpg
[Java]: http://www.iteye.com/topic/311583