java aes GetAlgorithProvider and UnicodeChinese

package com.jiepu;

import java.security.Provider.Service;
import java.security.Provider;
import java.security.Security;
import java.util.Set;


public class GetAlgorithProvider {

	public static void main(String[] args) {
		
		
		Provider[] provider=Security.getProviders();

		for (Provider provider2 : provider) {
			//String json=JSON.toJSONString(provider2);
			Set<Service> set=provider2.getServices();
			//System.out.println(set);
			for (Service service : set) {
				//System.out.println(service.getType()+","+service.getAlgorithm());
				System.out.println(service.getAlgorithm());
				
			}
		}
	}
}

package com.jiepu;

public class UnicodeChinese{


	public static String decodeUnicode(String theString) {
		char aChar;
		int len = theString.length();
		StringBuffer outBuffer = new StringBuffer(len);
		for (int x = 0; x < len;) {
			aChar = theString.charAt(x++);
			if (aChar == '\\') {
				aChar = theString.charAt(x++);
				if (aChar == 'u') {
					// Read the xxxx
					int value = 0;
					for (int i = 0; i < 4; i++) {
						aChar = theString.charAt(x++);
						switch (aChar) {
						case '0':
						case '1':
						case '2':
						case '3':
						case '4':
						case '5':
						case '6':
						case '7':
						case '8':
						case '9':
							value = (value << 4) + aChar - '0';
							break;
						case 'a':
						case 'b':
						case 'c':
						case 'd':
						case 'e':
						case 'f':
							value = (value << 4) + 10 + aChar - 'a';
							break;
						case 'A':
						case 'B':
						case 'C':
						case 'D':
						case 'E':
						case 'F':
							value = (value << 4) + 10 + aChar - 'A';
							break;
						default:
							throw new IllegalArgumentException(
									"Malformed   \\uxxxx   encoding.");
						}

					}
					outBuffer.append((char) value);
				} else {
					if (aChar == 't')
						aChar = '\t';
					else if (aChar == 'r')
						aChar = '\r';
					else if (aChar == 'n')
						aChar = '
';
					else if (aChar == 'f')
						aChar = '\f';
					outBuffer.append(aChar);
				}
			} else
				outBuffer.append(aChar);
		}
		return outBuffer.toString();
	}
	/**
	 *    unicode
	 * 
	 * @param str
	 * @return   unicode  
	 */
	public static String chineseToUnicode(String str) {
		StringBuffer result = new StringBuffer();
		for (int i = 0; i < str.length(); i++) {
			result.append("\\u" + Integer.toHexString(str.charAt(i)));
		}
		return result.toString();
	}

	/**
	 * unicode   
	 * 
	 * @param str
	 * @return   
	 */
	public static String unicodeToChinese(String str) {
		StringBuffer sb = new StringBuffer();
		for(char ch:str.toCharArray())
			sb.append(ch);
		//sb.append(str.toCharArray());
		return sb.toString();
	}

	public static void main(String args[]) {
		// unicode  �?
		String str = "\u767b\u5f55\u793e\u533a";		
		System.out.println(unicodeToChinese(str));
		for (char c : str.toCharArray())
			System.out.print(c);

		System.out.println();
		String result =chineseToUnicode("    ");
		System.out.println(result);

		System.out.println(chineseToUnicode(" 2                "));
		String hehe="\u7b2c2\u671f\u5168\u6c11\u6709\u5956\u7b54\u9898\u7efc\u827a\u771f\u4eba\u79c0\u5b8c\u7f8e\u843d\u5e55";
		str = unicodeToChinese("\u7b2c2\u671f\u5168\u6c11\u6709\u5956\u7b54\u9898\u7efc\u827a\u771f\u4eba\u79c0\u5b8c\u7f8e\u843d\u5e55");
		System.out.println(str);
		System.out.println(decodeUnicode(hehe));

	}

}