数据库表情转码与解码技术探讨

package test;

public class test2 {
public static void main(String[] args) {

System.out.println(" \ud83d\udc6b\u98ce\u6c34\u8d22\u8fd0 ");

String decodeUnicode1 = decodeUnicode1("\ud83d\udc6b\u98ce\u6c34\u8d22\u8fd0");
System.out.println("decodeUnicode1:"+decodeUnicode1);




}
public static String decodeUnicode1(final String dataStr) {
    try{
     System.out.println("dataStr------------"+dataStr);
        final StringBuffer buffer = new StringBuffer(dataStr==null?"":dataStr);
        if("".equals(dataStr) && dataStr.contains("\\u")) {
            buffer.delete(0,buffer.length());
            int start = 0;
            int end = 0;
            while (start > -1) {
                end = dataStr.indexOf("\\u", start + 2);
                String a="";//如果夹着非unicode编码的字符串，存放在这
                String charStr = "";
                if (end == -1) {
                    if(dataStr.substring(start + 2, dataStr.length()).length()>4){
                        charStr = dataStr.substring(start + 2, start + 6);
                        a = dataStr.substring(start + 6, dataStr.length())  ;