大家好哇,我是梦辛工作室的灵,在最近的开发中,有许多需要判断的分支处理,且处理内容较多且复杂,代码就容易越写越复杂,导致后期无法继续更新跌打,然后基于这个环境,我用责任链模式写了一个工具类用于解决这个问题,并将数据、判断、处理分隔开来,这样代码的重用性也增强了,下面来看下使用效果:
使用方法如下:
这里可自定义判断器和处理器,并自由组合,并链接起来,这里的判读器需实现一个检查方法,返回true 才会执行Handler的hand 方法,
而处理器返回true的话,就表示不在继续往后判断了,返回false表示,代码还是会下一个判断器进行判断
class Data1Check implements IfCheck{@Overridepublic boolean check(Object[] args) {if(args != null && args.length > 0 && "data1".equals(args[0])){System.out.println("Data1Check==>" + args[0] + "检查成功,处理");return true;}System.out.println("Data1Check==>" + args[0] + "检查失败,不处理");return false;}}class Data1Handler implements IfHandler{@Overridepublic boolean hand(Object[] args) {System.out.print(args[0]);System.out.println("已被Data1Handler处理");return false;}}class Data2Check implements IfCheck{@Overridepublic boolean check(Object[] args) {if(args != null && args.length > 0 && "data2".equals(args[0])){System.out.println("Data2Check==>" + args[0] + "检查成功,处理");return true;}System.out.println("Data2Check==>" + args[0] + "检查失败,不处理");return false;}}class Data2Handler implements IfHandler{@Overridepublic boolean hand(Object[] args) {System.out.print(args[0]);System.out.println("已被Data2Handler处理");return true;}}
然后再来看下完整的代码:
IfChain
public class IfChain {private IfChain nextChain;private Object[] args;private IfHandler handler;private IfCheck ifCheck;public IfChain(IfCheck ifCheck,IfHandler handler){this.ifCheck = ifCheck;this.handler = handler;}private boolean check(){if (ifCheck.check(args)){return handler.hand(args);}return false;}public IfCheck getIfCheck() {return ifCheck;}public void setIfCheck(IfCheck ifCheck) {this.ifCheck = ifCheck;}public IfChain getNextChain() {return nextChain;}public void setNextChain(IfChain nextChain) {this.nextChain = nextChain;}public Object[] getArgs() {return args;}public void setArgs(Object[] args) {this.args = args;}public IfHandler getHandler() {return handler;}public void setHandler(IfHandler handler) {this.handler = handler;}public void startCheck(){if (!check() && nextChain != null){nextChain.setArgs(args);nextChain.startCheck();}}}
IfHandler
public interface IfHandler {boolean hand(Object[] args);
}
IfCheck
public interface IfCheck {boolean check(Object[] args);
}
TestIfChain
public class TestIfChain {class Data1Check implements IfCheck{@Overridepublic boolean check(Object[] args) {if(args != null && args.length > 0 && "data1".equals(args[0])){System.out.println("Data1Check==>" + args[0] + "检查成功,处理");return true;}System.out.println("Data1Check==>" + args[0] + "检查失败,不处理");return false;}}class Data1Handler implements IfHandler{@Overridepublic boolean hand(Object[] args) {System.out.print(args[0]);System.out.println("已被Data1Handler处理");return false;}}class Data2Check implements IfCheck{@Overridepublic boolean check(Object[] args) {if(args != null && args.length > 0 && "data2".equals(args[0])){System.out.println("Data2Check==>" + args[0] + "检查成功,处理");return true;}System.out.println("Data2Check==>" + args[0] + "检查失败,不处理");return false;}}class Data2Handler implements IfHandler{@Overridepublic boolean hand(Object[] args) {System.out.print(args[0]);System.out.println("已被Data2Handler处理");return true;}}@Testpublic void doTest(){doCheck("data1");doCheck("data2");doCheck("data3");}private void doCheck(String data) {Object[] args = new Object[]{data};IfChain ifChainData1 = new IfChain(new Data1Check(),new Data1Handler());ifChainData1.setArgs(args);IfChain ifChainData2 = new IfChain(new Data2Check(),new Data2Handler());ifChainData2.setArgs(args);ifChainData1.setNextChain(ifChainData2);ifChainData1.startCheck();}private void doCheck2(String data){if("data1".equals(data)){System.out.println("data1已被Data1Handler");return;}if("data2".equals(data)){System.out.println("data1已被Data2Handler");return;}}
}
好了,今天的分享就到这里了
github连接 https://github.com/wintton/MxTestSql.git