String source="你好吗朋友helloworld"; for (int i = 0; i < source.length(); i++) { if ((source.charAt(i) >= 'A' && source.charAt(i) <= 'Z') || (source.charAt(i) >= 'a' && source.charAt(i) <= 'z') || (source.charAt(i) >= '0' && source.charAt(i) <= '9')) { String Chinese=source.substring(0, i); String Others=source.substring(i, source.length()); } }