import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
interface Filter {
String doFilter(String str, FilterChain chain);
}
class HtmlFilter implements Filter {
public String doFilter(String msg, FilterChain chain) {
String r = msg;
// 過濾msg中的HTML標記
r = r.replace("<", "<").replace(">", ">");
r = chain.doFilter(r, chain);
return r;
}
}
class SensitiveFilter implements Filter {
public String doFilter(String msg, FilterChain chain) {
String r = msg;
// 過濾敏感詞
r = r.replace("敏感", "").replace("被就業", "就業");
r = chain.doFilter(r, chain);
return r;
}
}
class FilterChain implements Filter {
public List<Filter> filters = new ArrayList<Filter>();
public FilterChain addFilter(Filter f) {
filters.add(f);
return this;
}
Iterator it = null;
public String doFilter(String msg, FilterChain chain) {
if (it == null) {
it = filters.iterator();
}
String result = msg;
// 執行filters中的doFilter方法即可
if (it.hasNext()) {
Filter f = (Filter) it.next();
result = (String) f.doFilter(msg, chain);
}
return result;
}
}
class MsgProcessor {
private String msg;
private FilterChain chain;
public MsgProcessor(String msg, FilterChain chain) {
this.msg = msg;
this.chain = chain;
}
public String process() {
return chain.doFilter(msg, chain);
}
}
public class MainClass {
public static void main(String[] args) {
// 需要被過濾的語句
String msg = "被就業了：），敏感資訊，<script>";
// 搞一個過過濾鏈
FilterChain chain = new FilterChain();
chain.addFilter(new HtmlFilter()).addFilter(new SensitiveFilter());
// 例項化處理類
MsgProcessor mp = new MsgProcessor(msg, chain);
String r = mp.process();
System.out.println(r);
}
}

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