判断编码格式

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判断字符的编码格式（处理中文乱码）

String subject = cursor.getString(1);if (!TextUtils.isEmpty(subject)) {try {if (java.nio.charset.Charset.forName("UTF-8").newEncoder().canEncode(subject)&& java.nio.charset.Charset.forName("ISO-8859-1").newEncoder().canEncode(subject)) {subject = new String(subject.getBytes("ISO-8859-1"), "UTF-8");} else if (java.nio.charset.Charset.forName("UTF-8").newEncoder().canEncode(subject)) {subject = new String(subject.getBytes(),"UTF-8");} else if (java.nio.charset.Charset.forName("ISO-8859-1").newEncoder().canEncode(subject)) {subject = new String(subject.getBytes(),"ISO-8859-1");} else {EncodedStringValue v = new EncodedStringValue(cursor.getInt(2),PduPersister.getBytes(subject));subject = v.getString();}} catch (Exception e) {EncodedStringValue v = new EncodedStringValue(cursor.getInt(2),PduPersister.getBytes(subject));subject = v.getString();}}