字段的转码

if (note.equals(new String(note.getBytes("GB2312"), "GB2312"))) {
                note = new String(note.getBytes("GB2312"), "utf-8");
            } else if (note.equals(new String(note.getBytes("iso-8859-1"), "iso-8859-1"))) {
                note = new String(note.getBytes("iso-8859-1"), "utf-8");
            } else if (note.equals(new String(note.getBytes("UTF-8"), "UTF-8"))) {
                note = new String(note.getBytes("UTF-8"), "utf-8");
            } else if (note.equals(new String(note.getBytes("GBK"), "GBK"))) {
                note = new String(note.getBytes("GBK"), "utf-8");
            }