我通过消息代理(Stomp)获取了这个字符串:
João
这就是它应该的样子:
João
有没有办法在Java中还原它?!谢谢!
我通过消息代理(Stomp)获取了这个字符串:
João
这就是它应该的样子:
João
U+00C3 Ã c3 83 LATIN CAPITAL LETTER A WITH TILDE
U+00C2 Â c3 82 LATIN CAPITAL LETTER A WITH CIRCUMFLEX
U+00A3 £ c2 a3 POUND SIGN
U+00E3 ã c3 a3 LATIN SMALL LETTER A WITH TILDE
我很难确定这是否是一个数据(编码)转换问题。这些数据可能只是有问题吗?
如果数据没有问题,那么我们必须假设您正在错误地解释编码。我们不知道原始编码,并且除非您做了一些不同的事情,否则Java的默认编码为UTF-16。我不明白在任何常见编码中编码的João
如何被解释为UTF-16中的João
为了确保,我用这个Python脚本来检查,没有找到匹配项。就我而言,我不完全确定它是否涵盖了所有编码或者是否缺少了某些角落的情况。
#!/usr/bin/env python
# -- coding: utf-8 --
import pkgutil
import encodings
good = u'João'
bad = u'João'
false_positives = set(["aliases"])
found = set(name for imp, name, ispkg in pkgutil.iter_modules(encodings.__path__) if not ispkg)
found.difference_update(false_positives)
print found
for x in found:
for y in found:
res = None
try:
res = good.encode(x).decode(y)
print res,x,y
except:
pass
if not res is None:
if res == bad:
print "FOUND"
exit(1)
package peter.test;
import java.io.UnsupportedEncodingException;
/**
* User: peter
* Date: 2012-04-12
* Time: 11:02 AM
*/
public class TestEncoding {
public static void main(String args[]) throws UnsupportedEncodingException {
//In some cases a hack works. But best is to prevent it from ever happening.
String good = "João";
String bad = "João";
//this line demonstrates what the "broken" string should look like if it is reversible.
String broken = breakString(good, bad);
//here we show that it is fixable if broken like breakString() does it.
fixString(good, broken);
//this line attempts to fix the string, but it is not fixable unless broken in the same way as breakString()
fixString(good, bad);
}
private static String fixString(String good, String bad) throws UnsupportedEncodingException {
byte[] bytes = bad.getBytes("latin1"); //read the Java bytes as if they were latin1 (if this works, it should result in the same number of bytes as java characters; if using UTF8, it would be more bytes)
String fixed = new String(bytes, "UTF8"); //take the raw bytes, and try to convert them to a string as if they were UTF8
System.out.println("Good: " + good);
System.out.println("Bad: " + bad);
System.out.println("bytes1.length: " + bytes.length);
System.out.println("fixed: " + fixed);
System.out.println();
return fixed;
}
private static String breakString(String good, String bad) throws UnsupportedEncodingException {
byte[] bytes = good.getBytes("UTF8");
String broken = new String(bytes, "latin1");
System.out.println("Good: " + good);
System.out.println("Bad: " + bad);
System.out.println("bytes1.length: " + bytes.length);
System.out.println("broken: " + broken);
System.out.println();
return broken;
}
}
以下是使用Sun jdk 1.7.0_03的结果:
Good: João
Bad: João
bytes1.length: 5
broken: João
Good: João
Bad: João
bytes1.length: 5
fixed: João
Good: João
Bad: João
bytes1.length: 6
fixed: Jo�£o