设计模式之责任链模式

Posted 2021-01-18 duheng-biu

实现：

　　链条和节点：

    public class Process implements Filter {
        private List<Filter> filters = new ArrayList<>();
        int index = 0;
    
        public void add(Filter filter) {
    
            filters.add(filter);
    
        }
    
        // 调用filter的方法
        @Override
        public void doFilter(Request request, Reponse reponse, Process process) {
            if (index == filters.size())
                return;
            Filter fc = filters.get(index);
            index++;
    
            fc.doFilter(request, reponse, process);
    
        }
    }
    处理结点：
    public class SenstiveFilter implements Filter {
        @Override
        public void doFilter(Request request, Reponse reponse,Process process) {
            request.request = request.request.replaceAll("不想学习","爱学习").concat("----》SenstiveFilter");
            process.doFilter(request, reponse, process);
            reponse.reponse = reponse.reponse.concat("----》SenstiveFilter");
        }
    
    }
    
    public class ScriptFilter implements Filter {
    
        @Override
        public void doFilter(Request request,Reponse reponse,Process process) {
             request.request = request.request.replaceAll("<","[").replaceAll(">", "]").concat("----》ScriptFilter");
             process.doFilter(request, reponse, process);
             reponse.reponse = reponse.reponse.concat("----》ScriptFilter");
        }
    
    }

解析：