求一个验证 (数字,字母(不分大小写) ,中文汉字) 的正则表达式

u4E00-u9FA5uF900-uFA2D
加上
w

   public static void main(String[] args) {
        // TODO implement RegexStuff.main
        String regex = "([\u4E00-\u9FA5\uF900-\uFA2D]|\\w)+";
        //Pattern pattern = Pattern.compile(regex);

        String str1 = "abcF";
        String str2 = "as212";
        String str3 = "das你好1d";
        String str4 = "34D4H好";
        String str5 = "大家";
        System.out.println(str1.matches(regex)); // true
        System.out.println(str2.matches(regex)); // true
        System.out.println(str3.matches(regex)); // true
        System.out.println(str4.matches(regex)); // true
        System.out.println(str5.matches(regex)); // true

    }

参考：http://benchild.iteye.com/blog/689603