public class SentenceAnalyzer {
	private char[] interpunction = new char[] { '！', '…', '!', '?', ',', '@',
			'“', '”', '"', '\'', '《', '》', '{', '}', '(', ')', ';', ':', '>',
			'<', '~', '_', '.', '[', ']', '/', '-', '：' };
 
	public SentenceAnalyzer() {
		interpunctionSet = new HashSet<Character>();
		for (char interpunctionChar : interpunction) {
			interpunctionSet.add(interpunctionChar);
		}
		interpunction = null;
	}
 
	private Set<Character> interpunctionSet;
 
	public String analyze(String str) {
		int length = str.length();
		StringBuffer buffer = new StringBuffer(length);
		boolean last = false;
		for (int i = 0; i < length; i++) {
			char ch = str.charAt(i);
			if (interpunctionSet.contains(ch)) {
				continue;
			}
			boolean al = isAlphanumeric(ch);
			// 合并连续的英文和数字
			if ((!al) || (!last)) {
				buffer.append(' ');
			}
			if (ch != ' ') {
				buffer.append(ch);
			}
 
			last = al;
		}
		return buffer.toString();
	}
 
	public boolean isAlphanumeric(char ch) {
		return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')
				|| (ch >= '0' && ch <= '9');
	}
 
	public static void main(String[] args) {
		SentenceAnalyzer analyzer = new SentenceAnalyzer();
		System.out.println(analyzer.analyze("姻缘天注定;-)你对你的另一半有何看法;-)"));
	}
    }