unicode与汉字之间的转换

/**
* 中文转unicode
* @param  str
* @return unicode
*/
public String  chineseToUnicode(String str)
{
String result = "";
for (int i = 0; i < str.length(); i++)
{
int chr1 = (char) str.charAt(i);
result  += "\\u" + Integer.toHexString(chr1);
}
return result;
}
/**
* unicode转中文
* @param  str
* @return 中文
*/
public static String UnicodeTochinese(String dataStr) {
int index = 0;
StringBuffer buffer = new StringBuffer();

while(index<dataStr.length()) {
if(!"\\u".equals(dataStr.substring(index,index+2))){
buffer.append(dataStr.charAt(index));
index++;
continue;
}
String charStr = "";
charStr = dataStr.substring(index+2,index+6);
char letter = (char) Integer.parseInt(charStr, 16 );
buffer.append(letter);
index+=6;
}
return buffer.toString();
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Test t = new Test();
String s = "中文";
String rs = t.chineseToUnicode(s);
System.out.println("unicode: "+rs.trim());
System.out.println("chinese: "+t.UnicodeTochinese(rs.trim()));
}