한신의 장군 되기: 위임 모드

//开发的同事进行抽象 public interface IEmployee { void doing(String command); } //下面假设有三哥员工 public class EmployeeA implements IEmployee{ @Override public void doing(String command) { System.out.println("我是员工A，擅长做数据库设计，现在开始做" + command); } } public class EmployeeB implements IEmployee { @Override public void doing(String command) { System.out.println("我是员工B，擅长做架构，现在开始做" + command); } } public class EmployeeC implements IEmployee { @Override public void doing(String command) { System.out.println("我是员工C，擅长做业务，现在开始做" + command); } }

import java.util.HashMap; import java.util.Map; public class Leader { private Map employeeMap = new HashMap<>(); //既然是项目经历，那他心里，肯定知道每个开发同事擅长的领域是什么 public Leader() { employeeMap.put("数据库设计", new EmployeeA()); employeeMap.put("架构设计", new EmployeeB()); employeeMap.put("业务代码", new EmployeeC()); } //leader接收到老板Boss的任务命令后 public void doing(String command) { //项目经理通过任务命令，找到对应的开发同事， // 然后把对应任务明给这位同事，这位同事就可以去干活了 employeeMap.get(command).doing(command); } }

public class Boss { //Boss也得根据每个项目经理锁负责的领域进行任务分配 public void command(String command, Leader leader) { leader.doing(command); } }

public class DelegateDemoTest { public static void main(String[] args) { new Boss().command("架构设计", new Leader()); } }

我是员工B，擅长做架构，现在开始做架构设计

protected void doService(HttpServletRequest request, HttpServletResponse response) throws Exception { //转发、分派 doDispatch(request, response); } /** * Process the actual dispatching to the handler. * 处理实际分派给处理程序 * 
The handler will be obtained by applying the servlet's HandlerMappings in order. * The HandlerAdapter will be obtained by querying the servlet's installed HandlerAdapters * to find the first that supports the handler class. * 
All HTTP methods are handled by this method. It's up to HandlerAdapters or handlers * themselves to decide which methods are acceptable. * @param request current HTTP request * @param response current HTTP response * @throws Exception in case of any kind of processing failure */ protected void doDispatch(HttpServletRequest request, HttpServletResponse response) throws Exception { ... }