java string乱码
题目出在预发、生产和当地环境的体系编码体式格局不一致，当地体系默许是UTF-8，而预发、生产环境默许是GBK编码，因而致使涌现乱码。
假如不指定编码体式格局，则默许以体系的编码体式格局。
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") //检察体系默许编码体式格局
解决方法以下：
1、运用string时举行转码
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、将乱码的字符串举行转码
String decodeStr=null; decodeStr = URLDecoder.decode(url, "utf-8");
因而在运用String的时刻，不管 encode 或许 decode都要指定编码体式格局，不然就和体系环境耦合了。
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