java-Unicode与中文的转换

package utils;

import org.apache.commons.lang3.StringUtils;

public class UnicodeUtils {

    public static String unicode2String(String unicode){
        if(StringUtils.isBlank(unicode))return null;
        StringBuilder sb = new StringBuilder();
        int i = -1;
        int pos = 0;

        while((i=unicode.indexOf("\\u", pos)) != -1){
            sb.append(unicode.substring(pos, i));
            if(i+5 < unicode.length()){
                pos = i+6;
                sb.append((char)Integer.parseInt(unicode.substring(i+2, i+6), 16));
            }
        }

        return sb.toString();
    }

    public static String string2Unicode(String string) {

        if(StringUtils.isBlank(string))return null;
        StringBuffer unicode = new StringBuffer();

        for (int i = 0; i < string.length(); i++) {

            // 取出每一个字符
            char c = string.charAt(i);

            // 转换为unicode
            unicode.append("\\u" + Integer.toHexString(c));
        }

        return unicode.toString();
    }

    public static void main(String[] args) {
       String string=UnicodeUtils.unicode2String("\\u4e0e\\u4e2d\\u6587\\u7684\\u8f6c\\u6362");
       System.out.println(string);

       String unicode=UnicodeUtils.string2Unicode("Unicode与中文的转换");
       System.out.println(unicode);

    }
}

输出结果：

与中文的转换
\u55\u6e\u69\u63\u6f\u64\u65\u4e0e\u4e2d\u6587\u7684\u8f6c\u6362