String str = "n1e你v00a?Az$Z000?#99?9900眯2_悄s3你y4@好?!6求救你d75a8t";

Pattern p= Pattern.compile("[u4e00-u9fa5]");//把汉字截取出来。

Matcher m= p.matcher(str);

while(m.find()){

System.out.print(m.group());

}

String str = "n1e你v00a?Az$Z000?#99?9900眯2_悄s3你y4@好?!6求救你d75a8t";

String a = "";

String b = "";

String d = "";

String s = "";

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

char c = str.charAt(i);

if(48<=c && c<=58){

a+=c;

} else if(64<=c && c<=91){

b+=c;

}else if(96<=c && c<=123){

b+=c;

}else{

if(((String.valueOf(c)).getBytes().length)>1){

d+=c;

}else{

s+=c;

}

}

}

System.out.println(a);

System.out.println(b);

System.out.println(d);

System.out.println(s);