java string garbled characters
The problem lies in the inconsistent system encoding methods of pre-release, production and local environments. The system default is UTF-8, while the default encoding for pre-release and production environments is GBK, resulting in garbled characters.
If the encoding method is not specified, the system encoding method will be used by default.
String csn = Charset.defaultCharset().name(); try { // use charset name decode() variant which provides caching. return decode(csn, ba, off, len); } catch (UnsupportedEncodingException x) { warnUnsupportedCharset(csn); } try { return decode("ISO-8859-1", ba, off, len); } catch (UnsupportedEncodingException x) { // If this code is hit during VM initialization, MessageUtils is // the only way we will be able to get any kind of error message. MessageUtils.err("ISO-8859-1 charset not available: " + x.toString()); // If we can not find ISO-8859-1 (a required encoding) then things // are seriously wrong with the installation. System.exit(1); return null; } System.getProperty("file.encoding") //查看系统默认编码方式
The solution is as follows:
1. Transcode when using string
System.out.println(str); String str1 = new String(str.getBytes("ISO-8859-1"), "utf-8"); System.out.println(str1); String str2 = new String(str.getBytes("gb2312"), "utf-8"); System.out.println(str2); String str3 = new String(str.getBytes("gbk"), "utf-8"); System.out.println(str3);
2. Transcoding garbled strings
String decodeStr=null; decodeStr = URLDecoder.decode(url, "utf-8");
Therefore, when using String, the encoding method must be specified regardless of encode or decode, otherwise it will be coupled with the system environment.
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