Java Charset
【摘要】
package com.demo.test; import java.nio.charset.Charset;import java.util.Arrays; /**（1）在中国，字符串转化默认使用GBK编码（2）转化表 英文（L） 中文（L） 混合（英文L1 + 中文L2）DEFAULT(GBK) L 2...
-
package com.demo.test;
-
-
import java.nio.charset.Charset;
-
import java.util.Arrays;
-
-
/**
-
（1）在中国，字符串转化默认使用GBK编码
-
（2）转化表
-
英文（L） 中文（L） 混合（英文L1 + 中文L2）
-
DEFAULT(GBK) L 2*L L1 + 2*L2
-
ISO8859-1 L L L1 + L2
-
ASCII L L L1 + L2
-
GBK L 2*L L1 + 2*L2
-
UTF-8 L 3*L L1 + 3*L2
-
UNICODE 2*L+2 2*L+2 2*(L1 + L2)+2
-
*/
-
public class CharsetDemo {
-
-
public static void main(String[] args) {
-
System.out.println("ASCII " + Charset.isSupported("ASCII"));//true
-
System.out.println("Shift_JIS " + Charset.isSupported("Shift_JIS"));//true
-
-
System.out.println("ISO-8859-1 " + Charset.isSupported("ISO-8859-1"));//true
-
System.out.println("I-S-O-8859-1 " + Charset.isSupported("I-S-O-8859-1"));//false
-
System.out.println("ISO8859-1 " + Charset.isSupported("ISO8859-1"));//true
-
System.out.println("ISO8859_1 " + Charset.isSupported("ISO8859_1"));//true
-
//error: java.nio.charset.IllegalCharsetNameException
-
// System.out.println("ISO8859 1 " + Charset.isSupported("ISO8859 1"));
-
//ISO8859必须有第一版的标识否则不合法
-
System.out.println("ISO8859 " + Charset.isSupported("ISO8859"));//false
-
-
//ISO/IEC8859-1，又称Latin-1或“ 西欧语言”，但这里用Latin-1却是不合法的
-
System.out.println("Latin-1 " + Charset.isSupported("Latin-1"));//false
-
-
System.out.println("UTF8 " + Charset.isSupported("UTF8"));//true
-
System.out.println("UTF-8 " + Charset.isSupported("UTF-8"));//true
-
System.out.println("UTF_8 " + Charset.isSupported("UTF_8"));//false
-
//CharsetName跟大小写无关
-
System.out.println("Unicode " + Charset.isSupported("Unicode"));//true
-
System.out.println("uNiCoDe " + Charset.isSupported("uNiCoDe"));//true
-
-
String str1 = "hello world";//11位
-
System.out.println(Arrays.toString(str1.toCharArray()));
-
System.out.println(Arrays.toString(toCharBytes(str1)));
-
System.out.println(Arrays.toString(str1.getBytes()));//11位，[104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100]
-
System.out.println(Arrays.toString(str1.getBytes(Charset.forName("ISO8859-1"))));//11位，[104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100]
-
System.out.println(Arrays.toString(str1.getBytes(Charset.forName("ASCII"))));//11位，[104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100]
-
System.out.println(Arrays.toString(str1.getBytes(Charset.forName("GBK"))));//11位，[104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100]
-
System.out.println(Arrays.toString(str1.getBytes(Charset.forName("UTF-8"))));//11位，[104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100]
-
System.out.println(Arrays.toString(str1.getBytes(Charset.forName("Unicode"))));//24位，[-2, -1, 0, 104, 0, 101, 0, 108, 0, 108, 0, 111, 0, 32, 0, 119, 0, 111, 0, 114, 0, 108, 0, 100]
-
System.out.println();
-
-
String str2 = "可惜不是你";//5位
-
System.out.println(Arrays.toString(str2.toCharArray()));
-
System.out.println(Arrays.toString(toCharBytes(str2)));
-
System.out.println(Arrays.toString(str2.getBytes()));//10位，[-65, -55, -49, -89, -78, -69, -54, -57, -60, -29]
-
System.out.println(Arrays.toString(str2.getBytes(Charset.forName("ISO8859-1"))));//5位，[63, 63, 63, 63, 63]
-
System.out.println(Arrays.toString(str2.getBytes(Charset.forName("ASCII"))));//5位，[63, 63, 63, 63, 63]
-
System.out.println(Arrays.toString(str2.getBytes(Charset.forName("GBK"))));//10位，[-65, -55, -49, -89, -78, -69, -54, -57, -60, -29]
-
System.out.println(Arrays.toString(str2.getBytes(Charset.forName("UTF-8"))));//15位，[-27, -113, -81, -26, -125, -100, -28, -72, -115, -26, -104, -81, -28, -67, -96]
-
System.out.println(Arrays.toString(str2.getBytes(Charset.forName("Unicode"))));//12位，[-2, -1, 83, -17, 96, -36, 78, 13, 102, 47, 79, 96]
-
System.out.println();
-
-
String str3 = "love!我爱你哟！";//5+5位
-
System.out.println(Arrays.toString(str3.toCharArray()));
-
System.out.println(Arrays.toString(toCharBytes(str3)));
-
System.out.println(Arrays.toString(str3.getBytes()));//15位，[108, 111, 118, 101, 33, -50, -46, -80, -82, -60, -29, -45, -76, -93, -95]
-
System.out.println(Arrays.toString(str3.getBytes(Charset.forName("ISO8859-1"))));//10位，[108, 111, 118, 101, 33, 63, 63, 63, 63, 63]
-
System.out.println(Arrays.toString(str3.getBytes(Charset.forName("ASCII"))));//10位，[108, 111, 118, 101, 33, 63, 63, 63, 63, 63]
-
System.out.println(Arrays.toString(str3.getBytes(Charset.forName("GBK"))));//15位，[108, 111, 118, 101, 33, -50, -46, -80, -82, -60, -29, -45, -76, -93, -95]
-
System.out.println(Arrays.toString(str3.getBytes(Charset.forName("UTF-8"))));//20位，[108, 111, 118, 101, 33, -26, -120, -111, -25, -120, -79, -28, -67, -96, -27, -109, -97, -17, -68, -127]
-
System.out.println(Arrays.toString(str3.getBytes(Charset.forName("Unicode"))));//22位，[-2, -1, 0, 108, 0, 111, 0, 118, 0, 101, 0, 33, 98, 17, 114, 49, 79, 96, 84, -33, -1, 1]
-
}
-
-
public static byte[] toCharBytes(String str) {
-
char[] charArr = str.toCharArray();
-
byte[] byteArr = new byte[charArr.length*2];
-
for(int i=0;i<charArr.length;i++) {
-
//当字符是英文时，该位的编码与ASCII和ISO8859-1均相同
-
byteArr[2*i] = (byte)(charArr[i] & 0xFF);
-
//当字符是英文的时候，高位是0；如果字符是中文，那么高位不为0。并且该编码也与GBK、UTF8、Unicode都不同
-
byteArr[2*i+1] = (byte)((charArr[i] & 0xFF00) >>> 8);
-
}
-
return byteArr;
-
}
-
}
文章来源: blog.csdn.net，作者：福州-司马懿，版权归原作者所有，如需转载，请联系作者。
原文链接：blog.csdn.net/chy555chy/article/details/52045782
【版权声明】本文为华为云社区用户转载文章，如果您发现本社区中有涉嫌抄袭的内容，欢迎发送邮件进行举报，并提供相关证据，一经查实，本社区将立刻删除涉嫌侵权内容，举报邮箱：
cloudbbs@huaweicloud.com
- 点赞
- 收藏
- 关注作者
评论（0）