毕业设计：学生选课系统以及毕业设计选题系统

package codeConvert; public class CodeConvert { public CodeConvert() {} public String native2unicode(String s) { if (s == null || s.length() == 0) { return null; } byte[] buffer = new byte[s.length()]; for (int i = 0; i < s.length(); i++) { buffer[i] = (byte) s.charAt(i); } return new String(buffer); } public String unicode2native(String s) { if (s == null || s.length() == 0) { return null; } char[] buffer = new char[s.length() * 2]; char c; int j = 0; for (int i = 0; i < s.length(); i++) { if (s.charAt(i) >= 0x100) { c = s.charAt(i); byte[] buf = ("" + c).getBytes(); buffer[j++] = (char) buf[0]; buffer[j++] = (char) buf[1]; } else { buffer[j++] = s.charAt(i); } } return new String(buffer, 0, j); } }