字符串编码规则

最新推荐文章于 2024-12-09 12:00:00 发布

changjunkui

最新推荐文章于 2024-12-09 12:00:00 发布

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分类专栏： java

本文链接：https://blog.youkuaiyun.com/changjunkui/article/details/20363035

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本文详细介绍了如何使用Java进行不同字符编码之间的转换，包括UTF-8、ISO-8859-1、GBK等编码方式，并展示了如何将字符串转换为字节数组及如何将字节数组再转换回字符串。

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System.out.println("default charset : "+Charset.defaultCharset());
String str = "abc你好";//string with UTF-8 charset

byte[] bytes = str.getBytes(Charset.forName("UTF-8"));//convert to byte array with UTF-8 encode
for (byte b : bytes)
{
System.out.print(b + " ");
}
System.out.println("\n");

Charset.defaultCharset() 表示平台默认的编码格式；

byte[] bytes = str.getBytes(Charset.forName("UTF-8"))表示通过UTF-8把字符串解析成为字节数组；

str12 = new String(bytes,"ISO-8859-1");表示把字节数组以ISO-8859-1编码转化为字符串；

byte[] bytesdefault = str.getBytes(Charset.defaultCharset());

for(byte b: bytesdefault)
{
System.out.print(b+" ");
}
System.out.println("\n");

byte[] bytesUnicode = str.getBytes(Charset.forName("Unicode"));
for(byte b: bytesUnicode)
{
System.out.print(b+" ");
}
System.out.print("\n");
System.out.println(bytesUnicode.length);

System.out.println("----------");

byte[] bytesISO88591 = str.getBytes(Charset.forName("ISO-8859-1"));
for(byte b: bytesISO88591)
{
System.out.print(b+" ");
}
System.out.println("");

String str12;
try {
str12 = new String(bytesISO88591,"ISO-8859-1");
System.out.print(str12);
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

System.out.print("\n");
try
{
String str1 = new String(bytes, "UTF-8");//to UTF-8 string
String str2 = new String(bytes, "ISO-8859-1");//to ISO-8859-1 string
String str3 = new String(bytes, "GBK");//to GBK string

System.out.println(str1);//abc你好
System.out.println(str2);//abc??????
System.out.println(str3);//abc浣犲ソ

System.out.println();

byte[] bytes2 = str2.getBytes(Charset.forName("ISO-8859-1"));

for (byte b : bytes2)
{
System.out.print(b + " ");
}

System.out.println();
String str22 = new String(bytes2, "UTF-8");
System.out.println(str22);//abc你好

System.out.println();

byte[] bytes3 = str3.getBytes(Charset.forName("GBK"));
for (byte b : bytes3)
{
System.out.print(b + " ");
}
System.out.println();
String str33 = new String(bytes3, "UTF-8");
System.out.println(str33);//abc你好
} catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}