CORTest.java

package JavaPatternDemos;

/**
 * ChainofResponsibility,责任链
 *
 * 重要的式链式结构，一级一级的处理
 *
 * 对比命令模式，命名模式更加简单一点，COR就是多了链式结构，
 * 客户端可以更简单，同时也可以处理更加复杂的情况。
 *
 */
public class CORTest {

 public static void main(String[] args) {

 CORRequest req = new CORRequest();

 CORHandler timehandler = new CORTimeHandler();
 CORHandler loghandler = new CORLoggerHandler();
 timehandler.setNextHandler(loghandler);

 timehandler.handle(req);
 }

}

class CORRequest{
 private String level;
 private String type;

 public String getType() {
 return type;
 }
 public String getLevel() {
 return level;
 }
}


abstract class CORHandler{
 protected CORHandler nextHandler;

 public CORHandler getNextHandler() {
 return nextHandler;
 }

 public void setNextHandler(CORHandler nextHandler) {
 this.nextHandler = nextHandler;
 }
 public abstract void handle(CORRequest req);
}


class CORTimeHandler extends CORHandler{

 @Override
 public void handle(CORRequest req) {
 if(req.getLevel() == "LEVEL_1"){
 // 处理reqeust
 }
 else{
 // 下一个继续处理
 nextHandler.handle(req);
 }

 }
}

class CORLoggerHandler extends CORHandler{

 @Override
 public void handle(CORRequest req) {
 if(req.getLevel() == "LEAVL_2"){
 // 处理
 }
 else{
 nextHandler.handle(req);
 }
 }
}