java设计模式之责任链模式，一个也不能少，每个人都是主角

<dependency>
 <groupId>com.google.guava</groupId>
 <artifactId>guava</artifactId>
 <version>18.0</version>
</dependency>

public class NoMode { private static final Escaper XSS= HtmlEscapers.htmlEscaper(); public static void main(String[] args) { System.out.println("替换前"); String request = "测试佣金，<script>，关注java程序员思维"; System.out.println(request); System.out.println("--------------------"); request = dealRequest(request); System.out.println("替换后"); System.out.println(request); }public static String dealRequest(String request){ request = request.replaceAll("佣金","***"); request = XSS.escape(request); return request; }}

public interface Strategy { public String dealRequest(String request);}public class XssStrategy implements Strategy { private static final Escaper XSS = HtmlEscapers.htmlEscaper(); @Override public String dealRequest(String request) { return XSS.escape(request); }}public class SensitiveStrategy implements Strategy { @Override public String dealRequest(String request) { return request.replaceAll("佣金", "***"); }}public class SensitiveStrategy implements Strategy { @Override public String dealRequest(String request) { return request.replaceAll("佣金", "***"); }}public class Client { private Strategy strategy;  public Client(Strategy strategy) { this.strategy = strategy; } public void setStrategy(Strategy strategy) { this.strategy = strategy; } public String dealRequest(String request){ return strategy.dealRequest(request); }}public class Test { public static void main(String[] args) { String request = "测试佣金，<script>，关注java程序员思维"; System.out.println("request: " + request); Strategy strategy = new XssStrategy(); Client client = new Client(strategy); request = client.dealRequest(request); client.setStrategy(new SensitiveStrategy()); request = client.dealRequest(request); System.out.println("最终结果：" + request); }}

public class ClientOptimize { private List<Strategy> list = new ArrayList<Strategy>(); public ClientOptimize addStrategy(Strategy strategy){ list.add(strategy); return this; } public String dealRequest(String request){ for(Strategy strategy : list){ request = strategy.dealRequest(request); } return request; }}public class ClientOptimizeTest { public static void main(String[] args) { String request = "测试佣金，<script>，关注java程序员思维"; System.out.println("request: " + request); ClientOptimize clientOptimize = new ClientOptimize(); request = clientOptimize.addStrategy(new XssStrategy()).addStrategy(new SensitiveStrategy()).dealRequest(request); System.out.println("最终结果：" + request); }}

public class Request { private String requestValue; public Request(String requestValue) { this.requestValue = requestValue; } public String getRequestValue() { return requestValue; } public void setRequestValue(String requestValue) { this.requestValue = requestValue; }}public class Response { private String responseValue; public Response(){} public Response(String responseValue) { this.responseValue = responseValue; } public String getResponseValue() { return responseValue; } public void setResponseValue(String responseValue) { this.responseValue = responseValue; }}public interface Filter { void doFilter(Request request,Response response,FilterChain chain);}public class XssFilter implements Filter{ private static final Escaper XSS= HtmlEscapers.htmlEscaper(); @Override public void doFilter(Request request, Response response, FilterChain chain) { System.out.println("xssFilter 开始执行"); request.setRequestValue(XSS.escape(request.getRequestValue())); chain.doFilter(request,response,chain); System.out.println("xssFilter 执行完毕"); } public static void main(String[] args) { System.out.println(XSS.escape("<script>,dfsafdsa")); }}public class SensitiveFilter implements Filter{ @Override public void doFilter(Request request, Response response, FilterChain chain) { System.out.println("SensitiveFilter 开始执行"); request.setRequestValue(replaceSensitive(request.getRequestValue())); chain.doFilter(request,response,chain); System.out.println("SensitiveFilter 执行完毕"); } public String replaceSensitive(String value){ return value.replaceAll("佣金","***"); }}public class FilterChain implements Filter { private List<Filter> filters = new ArrayList<Filter>(); private int index = 0; public FilterChain addFilter(Filter filter) { filters.add(filter); return this; } public void doFilter(Request request, Response response, FilterChain chain) { if (index == filters.size()) { response.setResponseValue(request.getRequestValue()); return; } Filter filter = filters.get(index); index++; filter.doFilter(request, response, chain); }}public class Test { public static void main(String[] args) { Request request = new Request("测试佣金，<script>，关注java程序员思维"); System.out.println("request：" + request.getRequestValue()); Response response = new Response(); FilterChain filterChain = new FilterChain(); filterChain.addFilter(new XssFilter()).addFilter(new SensitiveFilter()); filterChain.doFilter(request,response,filterChain); System.out.println("最终结果：" + response.getResponseValue()); }}